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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkcanvline.c,v 1.1.1.1 2001/06/13 04:56:46 dtashley Exp $ */ |
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/* |
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* tkCanvLine.c -- |
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* |
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* This file implements line items for canvas widgets. |
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* |
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* Copyright (c) 1991-1994 The Regents of the University of California. |
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* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
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* Copyright (c) 1998-1999 by Scriptics Corporation. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tkcanvline.c,v 1.1.1.1 2001/06/13 04:56:46 dtashley Exp $ |
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*/ |
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#include <stdio.h> |
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#include "tkInt.h" |
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#include "tkPort.h" |
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#include "tkCanvas.h" |
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/* |
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* The structure below defines the record for each line item. |
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*/ |
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typedef enum { |
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ARROWS_NONE, ARROWS_FIRST, ARROWS_LAST, ARROWS_BOTH |
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} Arrows; |
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typedef struct LineItem { |
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Tk_Item header; /* Generic stuff that's the same for all |
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* types. MUST BE FIRST IN STRUCTURE. */ |
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Tk_Outline outline; /* Outline structure */ |
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Tk_Canvas canvas; /* Canvas containing item. Needed for |
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* parsing arrow shapes. */ |
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int numPoints; /* Number of points in line (always >= 0). */ |
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double *coordPtr; /* Pointer to malloc-ed array containing |
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* x- and y-coords of all points in line. |
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* X-coords are even-valued indices, y-coords |
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* are corresponding odd-valued indices. If |
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* the line has arrowheads then the first |
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* and last points have been adjusted to refer |
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* to the necks of the arrowheads rather than |
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* their tips. The actual endpoints are |
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* stored in the *firstArrowPtr and |
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* *lastArrowPtr, if they exist. */ |
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int capStyle; /* Cap style for line. */ |
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int joinStyle; /* Join style for line. */ |
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GC arrowGC; /* Graphics context for drawing arrowheads. */ |
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Arrows arrow; /* Indicates whether or not to draw arrowheads: |
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* "none", "first", "last", or "both". */ |
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float arrowShapeA; /* Distance from tip of arrowhead to center. */ |
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float arrowShapeB; /* Distance from tip of arrowhead to trailing |
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* point, measured along shaft. */ |
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float arrowShapeC; /* Distance of trailing points from outside |
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* edge of shaft. */ |
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double *firstArrowPtr; /* Points to array of PTS_IN_ARROW points |
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* describing polygon for arrowhead at first |
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* point in line. First point of arrowhead |
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* is tip. Malloc'ed. NULL means no arrowhead |
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* at first point. */ |
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double *lastArrowPtr; /* Points to polygon for arrowhead at last |
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* point in line (PTS_IN_ARROW points, first |
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* of which is tip). Malloc'ed. NULL means |
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* no arrowhead at last point. */ |
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Tk_SmoothMethod *smooth; /* Non-zero means draw line smoothed (i.e. |
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* with Bezier splines). */ |
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int splineSteps; /* Number of steps in each spline segment. */ |
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} LineItem; |
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/* |
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* Number of points in an arrowHead: |
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*/ |
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#define PTS_IN_ARROW 6 |
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/* |
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* Prototypes for procedures defined in this file: |
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*/ |
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static int ArrowheadPostscript _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, LineItem *linePtr, |
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double *arrowPtr)); |
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static void ComputeLineBbox _ANSI_ARGS_((Tk_Canvas canvas, |
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LineItem *linePtr)); |
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static int ConfigureLine _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, Tk_Item *itemPtr, int argc, |
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Tcl_Obj *CONST argv[], int flags)); |
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static int ConfigureArrows _ANSI_ARGS_((Tk_Canvas canvas, |
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LineItem *linePtr)); |
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static int CreateLine _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, struct Tk_Item *itemPtr, |
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int argc, Tcl_Obj *CONST argv[])); |
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static void DeleteLine _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, Display *display)); |
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static void DisplayLine _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, Display *display, Drawable dst, |
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int x, int y, int width, int height)); |
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static int GetLineIndex _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, Tk_Item *itemPtr, |
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Tcl_Obj *obj, int *indexPtr)); |
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static int LineCoords _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, Tk_Item *itemPtr, |
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int argc, Tcl_Obj *CONST argv[])); |
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static void LineDeleteCoords _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, int first, int last)); |
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static void LineInsert _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, int beforeThis, Tcl_Obj *obj)); |
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static int LineToArea _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, double *rectPtr)); |
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static double LineToPoint _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, double *coordPtr)); |
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static int LineToPostscript _ANSI_ARGS_((Tcl_Interp *interp, |
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Tk_Canvas canvas, Tk_Item *itemPtr, int prepass)); |
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static int ArrowParseProc _ANSI_ARGS_((ClientData clientData, |
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Tcl_Interp *interp, Tk_Window tkwin, |
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CONST char *value, char *recordPtr, int offset)); |
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static char * ArrowPrintProc _ANSI_ARGS_((ClientData clientData, |
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Tk_Window tkwin, char *recordPtr, int offset, |
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Tcl_FreeProc **freeProcPtr)); |
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static int ParseArrowShape _ANSI_ARGS_((ClientData clientData, |
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Tcl_Interp *interp, Tk_Window tkwin, |
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CONST char *value, char *recordPtr, int offset)); |
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static char * PrintArrowShape _ANSI_ARGS_((ClientData clientData, |
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Tk_Window tkwin, char *recordPtr, int offset, |
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Tcl_FreeProc **freeProcPtr)); |
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static void ScaleLine _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, double originX, double originY, |
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double scaleX, double scaleY)); |
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static void TranslateLine _ANSI_ARGS_((Tk_Canvas canvas, |
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Tk_Item *itemPtr, double deltaX, double deltaY)); |
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/* |
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* Information used for parsing configuration specs. If you change any |
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* of the default strings, be sure to change the corresponding default |
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* values in CreateLine. |
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*/ |
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static Tk_CustomOption arrowShapeOption = { |
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(Tk_OptionParseProc *) ParseArrowShape, |
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PrintArrowShape, (ClientData) NULL |
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}; |
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static Tk_CustomOption arrowOption = { |
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(Tk_OptionParseProc *) ArrowParseProc, |
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ArrowPrintProc, (ClientData) NULL |
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}; |
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static Tk_CustomOption smoothOption = { |
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(Tk_OptionParseProc *) TkSmoothParseProc, |
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TkSmoothPrintProc, (ClientData) NULL |
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}; |
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static Tk_CustomOption stateOption = { |
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(Tk_OptionParseProc *) TkStateParseProc, |
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TkStatePrintProc, (ClientData) 2 |
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}; |
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static Tk_CustomOption tagsOption = { |
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(Tk_OptionParseProc *) Tk_CanvasTagsParseProc, |
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Tk_CanvasTagsPrintProc, (ClientData) NULL |
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}; |
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static Tk_CustomOption dashOption = { |
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(Tk_OptionParseProc *) TkCanvasDashParseProc, |
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TkCanvasDashPrintProc, (ClientData) NULL |
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}; |
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static Tk_CustomOption offsetOption = { |
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(Tk_OptionParseProc *) TkOffsetParseProc, |
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TkOffsetPrintProc, |
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(ClientData) (TK_OFFSET_RELATIVE|TK_OFFSET_INDEX) |
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}; |
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static Tk_CustomOption pixelOption = { |
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(Tk_OptionParseProc *) TkPixelParseProc, |
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TkPixelPrintProc, (ClientData) NULL |
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}; |
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static Tk_ConfigSpec configSpecs[] = { |
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{TK_CONFIG_CUSTOM, "-activedash", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(LineItem, outline.activeDash), |
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TK_CONFIG_NULL_OK, &dashOption}, |
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{TK_CONFIG_COLOR, "-activefill", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(LineItem, outline.activeColor), |
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TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_BITMAP, "-activestipple", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(LineItem, outline.activeStipple), |
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TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_CUSTOM, "-activewidth", (char *) NULL, (char *) NULL, |
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"0.0", Tk_Offset(LineItem, outline.activeWidth), |
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TK_CONFIG_DONT_SET_DEFAULT, &pixelOption}, |
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{TK_CONFIG_CUSTOM, "-arrow", (char *) NULL, (char *) NULL, |
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"none", Tk_Offset(LineItem, arrow), TK_CONFIG_DONT_SET_DEFAULT, &arrowOption}, |
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{TK_CONFIG_CUSTOM, "-arrowshape", (char *) NULL, (char *) NULL, |
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"8 10 3", Tk_Offset(LineItem, arrowShapeA), |
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TK_CONFIG_DONT_SET_DEFAULT, &arrowShapeOption}, |
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{TK_CONFIG_CAP_STYLE, "-capstyle", (char *) NULL, (char *) NULL, |
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"butt", Tk_Offset(LineItem, capStyle), TK_CONFIG_DONT_SET_DEFAULT}, |
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{TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL, |
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"black", Tk_Offset(LineItem, outline.color), TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_CUSTOM, "-dash", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(LineItem, outline.dash), |
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TK_CONFIG_NULL_OK, &dashOption}, |
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{TK_CONFIG_PIXELS, "-dashoffset", (char *) NULL, (char *) NULL, |
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"0", Tk_Offset(LineItem, outline.offset), |
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TK_CONFIG_DONT_SET_DEFAULT}, |
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{TK_CONFIG_CUSTOM, "-disableddash", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(LineItem, outline.disabledDash), |
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TK_CONFIG_NULL_OK, &dashOption}, |
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{TK_CONFIG_COLOR, "-disabledfill", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(LineItem, outline.disabledColor), |
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TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_BITMAP, "-disabledstipple", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(LineItem, outline.disabledStipple), |
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TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_CUSTOM, "-disabledwidth", (char *) NULL, (char *) NULL, |
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"0.0", Tk_Offset(LineItem, outline.disabledWidth), |
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TK_CONFIG_DONT_SET_DEFAULT, &pixelOption}, |
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{TK_CONFIG_JOIN_STYLE, "-joinstyle", (char *) NULL, (char *) NULL, |
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"round", Tk_Offset(LineItem, joinStyle), TK_CONFIG_DONT_SET_DEFAULT}, |
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{TK_CONFIG_CUSTOM, "-offset", (char *) NULL, (char *) NULL, |
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"0,0", Tk_Offset(LineItem, outline.tsoffset), |
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TK_CONFIG_DONT_SET_DEFAULT, &offsetOption}, |
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{TK_CONFIG_CUSTOM, "-smooth", (char *) NULL, (char *) NULL, |
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"0", Tk_Offset(LineItem, smooth), |
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TK_CONFIG_DONT_SET_DEFAULT, &smoothOption}, |
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{TK_CONFIG_INT, "-splinesteps", (char *) NULL, (char *) NULL, |
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"12", Tk_Offset(LineItem, splineSteps), TK_CONFIG_DONT_SET_DEFAULT}, |
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{TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, |
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&stateOption}, |
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{TK_CONFIG_BITMAP, "-stipple", (char *) NULL, (char *) NULL, |
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(char *) NULL, Tk_Offset(LineItem, outline.stipple), |
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TK_CONFIG_NULL_OK}, |
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{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL, |
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(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, |
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{TK_CONFIG_CUSTOM, "-width", (char *) NULL, (char *) NULL, |
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"1.0", Tk_Offset(LineItem, outline.width), |
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TK_CONFIG_DONT_SET_DEFAULT, &pixelOption}, |
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, |
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(char *) NULL, 0, 0} |
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}; |
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/* |
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* The structures below defines the line item type by means |
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* of procedures that can be invoked by generic item code. |
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*/ |
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Tk_ItemType tkLineType = { |
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"line", /* name */ |
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sizeof(LineItem), /* itemSize */ |
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CreateLine, /* createProc */ |
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configSpecs, /* configSpecs */ |
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ConfigureLine, /* configureProc */ |
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LineCoords, /* coordProc */ |
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DeleteLine, /* deleteProc */ |
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DisplayLine, /* displayProc */ |
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TK_CONFIG_OBJS, /* flags */ |
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LineToPoint, /* pointProc */ |
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LineToArea, /* areaProc */ |
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LineToPostscript, /* postscriptProc */ |
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ScaleLine, /* scaleProc */ |
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TranslateLine, /* translateProc */ |
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(Tk_ItemIndexProc *) GetLineIndex, /* indexProc */ |
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(Tk_ItemCursorProc *) NULL, /* icursorProc */ |
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(Tk_ItemSelectionProc *) NULL, /* selectionProc */ |
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(Tk_ItemInsertProc *) LineInsert, /* insertProc */ |
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LineDeleteCoords, /* dTextProc */ |
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(Tk_ItemType *) NULL, /* nextPtr */ |
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}; |
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/* |
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* The definition below determines how large are static arrays |
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* used to hold spline points (splines larger than this have to |
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* have their arrays malloc-ed). |
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*/ |
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#define MAX_STATIC_POINTS 200 |
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/* |
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*-------------------------------------------------------------- |
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* |
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* CreateLine -- |
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* |
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* This procedure is invoked to create a new line item in |
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* a canvas. |
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* |
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* Results: |
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* A standard Tcl return value. If an error occurred in |
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* creating the item, then an error message is left in |
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* the interp's result; in this case itemPtr is left uninitialized, |
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* so it can be safely freed by the caller. |
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* |
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* Side effects: |
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* A new line item is created. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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static int |
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CreateLine(interp, canvas, itemPtr, argc, argv) |
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Tcl_Interp *interp; /* Interpreter for error reporting. */ |
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Tk_Canvas canvas; /* Canvas to hold new item. */ |
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Tk_Item *itemPtr; /* Record to hold new item; header |
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* has been initialized by caller. */ |
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int argc; /* Number of arguments in argv. */ |
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Tcl_Obj *CONST argv[]; /* Arguments describing line. */ |
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{ |
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LineItem *linePtr = (LineItem *) itemPtr; |
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int i; |
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/* |
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* Carry out initialization that is needed to set defaults and to |
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* allow proper cleanup after errors during the the remainder of |
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* this procedure. |
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*/ |
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Tk_CreateOutline(&(linePtr->outline)); |
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linePtr->canvas = canvas; |
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linePtr->numPoints = 0; |
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linePtr->coordPtr = NULL; |
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linePtr->capStyle = CapButt; |
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linePtr->joinStyle = JoinRound; |
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linePtr->arrowGC = None; |
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linePtr->arrow = ARROWS_NONE; |
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linePtr->arrowShapeA = (float)8.0; |
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linePtr->arrowShapeB = (float)10.0; |
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linePtr->arrowShapeC = (float)3.0; |
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linePtr->firstArrowPtr = NULL; |
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linePtr->lastArrowPtr = NULL; |
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linePtr->smooth = (Tk_SmoothMethod *) NULL; |
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linePtr->splineSteps = 12; |
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/* |
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* Count the number of points and then parse them into a point |
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* array. Leading arguments are assumed to be points if they |
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* start with a digit or a minus sign followed by a digit. |
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*/ |
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for (i = 0; i < argc; i++) { |
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char *arg = Tcl_GetStringFromObj(argv[i], NULL); |
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if ((arg[0] == '-') && (arg[1] >= 'a') |
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&& (arg[1] <= 'z')) { |
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break; |
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} |
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} |
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if (i && (LineCoords(interp, canvas, itemPtr, i, argv) != TCL_OK)) { |
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goto error; |
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} |
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if (ConfigureLine(interp, canvas, itemPtr, argc-i, argv+i, 0) == TCL_OK) { |
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return TCL_OK; |
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} |
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error: |
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DeleteLine(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); |
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return TCL_ERROR; |
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} |
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/* |
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*-------------------------------------------------------------- |
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* |
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* LineCoords -- |
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* |
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* This procedure is invoked to process the "coords" widget |
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* command on lines. See the user documentation for details |
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* on what it does. |
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* |
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* Results: |
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* Returns TCL_OK or TCL_ERROR, and sets the interp's result. |
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* |
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* Side effects: |
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* The coordinates for the given item may be changed. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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static int |
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LineCoords(interp, canvas, itemPtr, argc, argv) |
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Tcl_Interp *interp; /* Used for error reporting. */ |
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Tk_Canvas canvas; /* Canvas containing item. */ |
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Tk_Item *itemPtr; /* Item whose coordinates are to be |
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* read or modified. */ |
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int argc; /* Number of coordinates supplied in |
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* argv. */ |
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Tcl_Obj *CONST argv[]; /* Array of coordinates: x1, y1, |
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* x2, y2, ... */ |
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{ |
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LineItem *linePtr = (LineItem *) itemPtr; |
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int i, numPoints; |
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double *coordPtr; |
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if (argc == 0) { |
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int numCoords; |
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Tcl_Obj *subobj, *obj = Tcl_NewObj(); |
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numCoords = 2*linePtr->numPoints; |
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if (linePtr->firstArrowPtr != NULL) { |
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coordPtr = linePtr->firstArrowPtr; |
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} else { |
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coordPtr = linePtr->coordPtr; |
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} |
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for (i = 0; i < numCoords; i++, coordPtr++) { |
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if (i == 2) { |
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coordPtr = linePtr->coordPtr+2; |
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} |
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if ((linePtr->lastArrowPtr != NULL) && (i == (numCoords-2))) { |
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coordPtr = linePtr->lastArrowPtr; |
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} |
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subobj = Tcl_NewDoubleObj(*coordPtr); |
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Tcl_ListObjAppendElement(interp, obj, subobj); |
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} |
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Tcl_SetObjResult(interp, obj); |
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return TCL_OK; |
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} |
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if (argc == 1) { |
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if (Tcl_ListObjGetElements(interp, argv[0], &argc, |
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(Tcl_Obj ***) &argv) != TCL_OK) { |
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return TCL_ERROR; |
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} |
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} |
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|
if (argc & 1) { |
|
|
Tcl_AppendResult(interp, |
|
|
"odd number of coordinates specified for line", |
|
|
(char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} else if (argc < 4) { |
|
|
Tcl_AppendResult(interp, |
|
|
"too few coordinates specified for line", |
|
|
(char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} else { |
|
|
numPoints = argc/2; |
|
|
if (linePtr->numPoints != numPoints) { |
|
|
coordPtr = (double *) ckalloc((unsigned) |
|
|
(sizeof(double) * argc)); |
|
|
if (linePtr->coordPtr != NULL) { |
|
|
ckfree((char *) linePtr->coordPtr); |
|
|
} |
|
|
linePtr->coordPtr = coordPtr; |
|
|
linePtr->numPoints = numPoints; |
|
|
} |
|
|
coordPtr = linePtr->coordPtr; |
|
|
for (i = 0; i <argc; i++) { |
|
|
if (Tk_CanvasGetCoordFromObj(interp, canvas, argv[i], |
|
|
coordPtr++) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Update arrowheads by throwing away any existing arrow-head |
|
|
* information and calling ConfigureArrows to recompute it. |
|
|
*/ |
|
|
|
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
ckfree((char *) linePtr->firstArrowPtr); |
|
|
linePtr->firstArrowPtr = NULL; |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
ckfree((char *) linePtr->lastArrowPtr); |
|
|
linePtr->lastArrowPtr = NULL; |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_NONE) { |
|
|
ConfigureArrows(canvas, linePtr); |
|
|
} |
|
|
ComputeLineBbox(canvas, linePtr); |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ConfigureLine -- |
|
|
* |
|
|
* This procedure is invoked to configure various aspects |
|
|
* of a line item such as its background color. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl result code. If an error occurs, then |
|
|
* an error message is left in the interp's result. |
|
|
* |
|
|
* Side effects: |
|
|
* Configuration information, such as colors and stipple |
|
|
* patterns, may be set for itemPtr. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
ConfigureLine(interp, canvas, itemPtr, argc, argv, flags) |
|
|
Tcl_Interp *interp; /* Used for error reporting. */ |
|
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
|
|
Tk_Item *itemPtr; /* Line item to reconfigure. */ |
|
|
int argc; /* Number of elements in argv. */ |
|
|
Tcl_Obj *CONST argv[]; /* Arguments describing things to configure. */ |
|
|
int flags; /* Flags to pass to Tk_ConfigureWidget. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
XGCValues gcValues; |
|
|
GC newGC, arrowGC; |
|
|
unsigned long mask; |
|
|
Tk_Window tkwin; |
|
|
Tk_State state; |
|
|
|
|
|
tkwin = Tk_CanvasTkwin(canvas); |
|
|
if (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, (char **) argv, |
|
|
(char *) linePtr, flags|TK_CONFIG_OBJS) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* A few of the options require additional processing, such as |
|
|
* graphics contexts. |
|
|
*/ |
|
|
|
|
|
state = itemPtr->state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
if (linePtr->outline.activeWidth > linePtr->outline.width || |
|
|
linePtr->outline.activeDash.number != 0 || |
|
|
linePtr->outline.activeColor != NULL || |
|
|
linePtr->outline.activeStipple != None) { |
|
|
itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT; |
|
|
} else { |
|
|
itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT; |
|
|
} |
|
|
mask = Tk_ConfigOutlineGC(&gcValues, canvas, itemPtr, |
|
|
&(linePtr->outline)); |
|
|
if (mask) { |
|
|
if (linePtr->arrow == ARROWS_NONE) { |
|
|
gcValues.cap_style = linePtr->capStyle; |
|
|
mask |= GCCapStyle; |
|
|
} |
|
|
gcValues.join_style = linePtr->joinStyle; |
|
|
mask |= GCJoinStyle; |
|
|
newGC = Tk_GetGC(tkwin, mask, &gcValues); |
|
|
gcValues.line_width = 0; |
|
|
arrowGC = Tk_GetGC(tkwin, mask, &gcValues); |
|
|
} else { |
|
|
newGC = arrowGC = None; |
|
|
} |
|
|
if (linePtr->outline.gc != None) { |
|
|
Tk_FreeGC(Tk_Display(tkwin), linePtr->outline.gc); |
|
|
} |
|
|
if (linePtr->arrowGC != None) { |
|
|
Tk_FreeGC(Tk_Display(tkwin), linePtr->arrowGC); |
|
|
} |
|
|
linePtr->outline.gc = newGC; |
|
|
linePtr->arrowGC = arrowGC; |
|
|
|
|
|
/* |
|
|
* Keep spline parameters within reasonable limits. |
|
|
*/ |
|
|
|
|
|
if (linePtr->splineSteps < 1) { |
|
|
linePtr->splineSteps = 1; |
|
|
} else if (linePtr->splineSteps > 100) { |
|
|
linePtr->splineSteps = 100; |
|
|
} |
|
|
|
|
|
if ((!linePtr->numPoints) || (state==TK_STATE_HIDDEN)) { |
|
|
ComputeLineBbox(canvas, linePtr); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Setup arrowheads, if needed. If arrowheads are turned off, |
|
|
* restore the line's endpoints (they were shortened when the |
|
|
* arrowheads were added). |
|
|
*/ |
|
|
|
|
|
if ((linePtr->firstArrowPtr != NULL) && (linePtr->arrow != ARROWS_FIRST) |
|
|
&& (linePtr->arrow != ARROWS_BOTH)) { |
|
|
linePtr->coordPtr[0] = linePtr->firstArrowPtr[0]; |
|
|
linePtr->coordPtr[1] = linePtr->firstArrowPtr[1]; |
|
|
ckfree((char *) linePtr->firstArrowPtr); |
|
|
linePtr->firstArrowPtr = NULL; |
|
|
} |
|
|
if ((linePtr->lastArrowPtr != NULL) && (linePtr->arrow != ARROWS_LAST) |
|
|
&& (linePtr->arrow != ARROWS_BOTH)) { |
|
|
int i; |
|
|
|
|
|
i = 2*(linePtr->numPoints-1); |
|
|
linePtr->coordPtr[i] = linePtr->lastArrowPtr[0]; |
|
|
linePtr->coordPtr[i+1] = linePtr->lastArrowPtr[1]; |
|
|
ckfree((char *) linePtr->lastArrowPtr); |
|
|
linePtr->lastArrowPtr = NULL; |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_NONE) { |
|
|
ConfigureArrows(canvas, linePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Recompute bounding box for line. |
|
|
*/ |
|
|
|
|
|
ComputeLineBbox(canvas, linePtr); |
|
|
|
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* DeleteLine -- |
|
|
* |
|
|
* This procedure is called to clean up the data structure |
|
|
* associated with a line item. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Resources associated with itemPtr are released. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DeleteLine(canvas, itemPtr, display) |
|
|
Tk_Canvas canvas; /* Info about overall canvas widget. */ |
|
|
Tk_Item *itemPtr; /* Item that is being deleted. */ |
|
|
Display *display; /* Display containing window for |
|
|
* canvas. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
|
|
|
Tk_DeleteOutline(display, &(linePtr->outline)); |
|
|
if (linePtr->coordPtr != NULL) { |
|
|
ckfree((char *) linePtr->coordPtr); |
|
|
} |
|
|
if (linePtr->arrowGC != None) { |
|
|
Tk_FreeGC(display, linePtr->arrowGC); |
|
|
} |
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
ckfree((char *) linePtr->firstArrowPtr); |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
ckfree((char *) linePtr->lastArrowPtr); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ComputeLineBbox -- |
|
|
* |
|
|
* This procedure is invoked to compute the bounding box of |
|
|
* all the pixels that may be drawn as part of a line. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The fields x1, y1, x2, and y2 are updated in the header |
|
|
* for itemPtr. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ComputeLineBbox(canvas, linePtr) |
|
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
|
|
LineItem *linePtr; /* Item whose bbos is to be |
|
|
* recomputed. */ |
|
|
{ |
|
|
double *coordPtr; |
|
|
int i, intWidth; |
|
|
double width; |
|
|
Tk_State state = linePtr->header.state; |
|
|
Tk_TSOffset *tsoffset; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
if (!(linePtr->numPoints) || (state==TK_STATE_HIDDEN)) { |
|
|
linePtr->header.x1 = -1; |
|
|
linePtr->header.x2 = -1; |
|
|
linePtr->header.y1 = -1; |
|
|
linePtr->header.y2 = -1; |
|
|
return; |
|
|
} |
|
|
|
|
|
width = linePtr->outline.width; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)linePtr) { |
|
|
if (linePtr->outline.activeWidth>width) { |
|
|
width = linePtr->outline.activeWidth; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (linePtr->outline.disabledWidth>0) { |
|
|
width = linePtr->outline.disabledWidth; |
|
|
} |
|
|
} |
|
|
|
|
|
coordPtr = linePtr->coordPtr; |
|
|
linePtr->header.x1 = linePtr->header.x2 = (int) *coordPtr; |
|
|
linePtr->header.y1 = linePtr->header.y2 = (int) coordPtr[1]; |
|
|
|
|
|
/* |
|
|
* Compute the bounding box of all the points in the line, |
|
|
* then expand in all directions by the line's width to take |
|
|
* care of butting or rounded corners and projecting or |
|
|
* rounded caps. This expansion is an overestimate (worst-case |
|
|
* is square root of two over two) but it's simple. Don't do |
|
|
* anything special for curves. This causes an additional |
|
|
* overestimate in the bounding box, but is faster. |
|
|
*/ |
|
|
|
|
|
for (i = 1, coordPtr = linePtr->coordPtr+2; i < linePtr->numPoints; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint((Tk_Item *) linePtr, coordPtr); |
|
|
} |
|
|
width = linePtr->outline.width; |
|
|
if (width < 1.0) { |
|
|
width = 1.0; |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_NONE) { |
|
|
if (linePtr->arrow != ARROWS_LAST) { |
|
|
TkIncludePoint((Tk_Item *) linePtr, linePtr->firstArrowPtr); |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_FIRST) { |
|
|
TkIncludePoint((Tk_Item *) linePtr, linePtr->lastArrowPtr); |
|
|
} |
|
|
} |
|
|
|
|
|
tsoffset = &linePtr->outline.tsoffset; |
|
|
if (tsoffset->flags & TK_OFFSET_INDEX) { |
|
|
double *coordPtr = linePtr->coordPtr + (tsoffset->flags & ~TK_OFFSET_INDEX); |
|
|
if (tsoffset->flags <= 0) { |
|
|
coordPtr = linePtr->coordPtr; |
|
|
if ((linePtr->arrow == ARROWS_FIRST) || (linePtr->arrow == ARROWS_BOTH)) { |
|
|
coordPtr = linePtr->firstArrowPtr; |
|
|
} |
|
|
} |
|
|
if (tsoffset->flags > (linePtr->numPoints * 2)) { |
|
|
coordPtr = linePtr->coordPtr + (linePtr->numPoints * 2); |
|
|
if ((linePtr->arrow == ARROWS_LAST) || (linePtr->arrow == ARROWS_BOTH)) { |
|
|
coordPtr = linePtr->lastArrowPtr; |
|
|
} |
|
|
} |
|
|
tsoffset->xoffset = (int) (coordPtr[0] + 0.5); |
|
|
tsoffset->yoffset = (int) (coordPtr[1] + 0.5); |
|
|
} else { |
|
|
if (tsoffset->flags & TK_OFFSET_LEFT) { |
|
|
tsoffset->xoffset = linePtr->header.x1; |
|
|
} else if (tsoffset->flags & TK_OFFSET_CENTER) { |
|
|
tsoffset->xoffset = (linePtr->header.x1 + linePtr->header.x2)/2; |
|
|
} else if (tsoffset->flags & TK_OFFSET_RIGHT) { |
|
|
tsoffset->xoffset = linePtr->header.x2; |
|
|
} |
|
|
if (tsoffset->flags & TK_OFFSET_TOP) { |
|
|
tsoffset->yoffset = linePtr->header.y1; |
|
|
} else if (tsoffset->flags & TK_OFFSET_MIDDLE) { |
|
|
tsoffset->yoffset = (linePtr->header.y1 + linePtr->header.y2)/2; |
|
|
} else if (tsoffset->flags & TK_OFFSET_BOTTOM) { |
|
|
tsoffset->yoffset = linePtr->header.y2; |
|
|
} |
|
|
} |
|
|
|
|
|
intWidth = (int) (width + 0.5); |
|
|
linePtr->header.x1 -= intWidth; |
|
|
linePtr->header.x2 += intWidth; |
|
|
linePtr->header.y1 -= intWidth; |
|
|
linePtr->header.y2 += intWidth; |
|
|
|
|
|
if (linePtr->numPoints==1) { |
|
|
linePtr->header.x1 -= 1; |
|
|
linePtr->header.x2 += 1; |
|
|
linePtr->header.y1 -= 1; |
|
|
linePtr->header.y2 += 1; |
|
|
return; |
|
|
} |
|
|
|
|
|
/* |
|
|
* For mitered lines, make a second pass through all the points. |
|
|
* Compute the locations of the two miter vertex points and add |
|
|
* those into the bounding box. |
|
|
*/ |
|
|
|
|
|
if (linePtr->joinStyle == JoinMiter) { |
|
|
for (i = linePtr->numPoints, coordPtr = linePtr->coordPtr; i >= 3; |
|
|
i--, coordPtr += 2) { |
|
|
double miter[4]; |
|
|
int j; |
|
|
|
|
|
if (TkGetMiterPoints(coordPtr, coordPtr+2, coordPtr+4, |
|
|
width, miter, miter+2)) { |
|
|
for (j = 0; j < 4; j += 2) { |
|
|
TkIncludePoint((Tk_Item *) linePtr, miter+j); |
|
|
} |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Add in the sizes of arrowheads, if any. |
|
|
*/ |
|
|
|
|
|
if (linePtr->arrow != ARROWS_NONE) { |
|
|
if (linePtr->arrow != ARROWS_LAST) { |
|
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint((Tk_Item *) linePtr, coordPtr); |
|
|
} |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_FIRST) { |
|
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint((Tk_Item *) linePtr, coordPtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Add one more pixel of fudge factor just to be safe (e.g. |
|
|
* X may round differently than we do). |
|
|
*/ |
|
|
|
|
|
linePtr->header.x1 -= 1; |
|
|
linePtr->header.x2 += 1; |
|
|
linePtr->header.y1 -= 1; |
|
|
linePtr->header.y2 += 1; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* DisplayLine -- |
|
|
* |
|
|
* This procedure is invoked to draw a line item in a given |
|
|
* drawable. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* ItemPtr is drawn in drawable using the transformation |
|
|
* information in canvas. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
DisplayLine(canvas, itemPtr, display, drawable, x, y, width, height) |
|
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
|
|
Tk_Item *itemPtr; /* Item to be displayed. */ |
|
|
Display *display; /* Display on which to draw item. */ |
|
|
Drawable drawable; /* Pixmap or window in which to draw |
|
|
* item. */ |
|
|
int x, y, width, height; /* Describes region of canvas that |
|
|
* must be redisplayed (not used). */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
XPoint staticPoints[MAX_STATIC_POINTS]; |
|
|
XPoint *pointPtr; |
|
|
XPoint *pPtr; |
|
|
double *coordPtr, linewidth; |
|
|
int i, numPoints; |
|
|
Tk_State state = itemPtr->state; |
|
|
Pixmap stipple = linePtr->outline.stipple; |
|
|
|
|
|
if ((!linePtr->numPoints)||(linePtr->outline.gc==None)) { |
|
|
return; |
|
|
} |
|
|
|
|
|
if (state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
linewidth = linePtr->outline.width; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (linePtr->outline.activeStipple!=None) { |
|
|
stipple = linePtr->outline.activeStipple; |
|
|
} |
|
|
if (linePtr->outline.activeWidth>linewidth) { |
|
|
linewidth = linePtr->outline.activeWidth; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (linePtr->outline.disabledStipple!=None) { |
|
|
stipple = linePtr->outline.disabledStipple; |
|
|
} |
|
|
if (linePtr->outline.disabledWidth>linewidth) { |
|
|
linewidth = linePtr->outline.activeWidth; |
|
|
} |
|
|
} |
|
|
/* |
|
|
* Build up an array of points in screen coordinates. Use a |
|
|
* static array unless the line has an enormous number of points; |
|
|
* in this case, dynamically allocate an array. For smoothed lines, |
|
|
* generate the curve points on each redisplay. |
|
|
*/ |
|
|
|
|
|
if ((linePtr->smooth) && (linePtr->numPoints > 2)) { |
|
|
numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, |
|
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
|
|
(double *) NULL); |
|
|
} else { |
|
|
numPoints = linePtr->numPoints; |
|
|
} |
|
|
|
|
|
if (numPoints <= MAX_STATIC_POINTS) { |
|
|
pointPtr = staticPoints; |
|
|
} else { |
|
|
pointPtr = (XPoint *) ckalloc((unsigned) (numPoints * sizeof(XPoint))); |
|
|
} |
|
|
|
|
|
if ((linePtr->smooth) && (linePtr->numPoints > 2)) { |
|
|
numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, |
|
|
linePtr->numPoints, linePtr->splineSteps, pointPtr, |
|
|
(double *) NULL); |
|
|
} else { |
|
|
for (i = 0, coordPtr = linePtr->coordPtr, pPtr = pointPtr; |
|
|
i < linePtr->numPoints; i += 1, coordPtr += 2, pPtr++) { |
|
|
Tk_CanvasDrawableCoords(canvas, coordPtr[0], coordPtr[1], |
|
|
&pPtr->x, &pPtr->y); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Display line, the free up line storage if it was dynamically |
|
|
* allocated. If we're stippling, then modify the stipple offset |
|
|
* in the GC. Be sure to reset the offset when done, since the |
|
|
* GC is supposed to be read-only. |
|
|
*/ |
|
|
|
|
|
if (Tk_ChangeOutlineGC(canvas, itemPtr, &(linePtr->outline))) { |
|
|
Tk_CanvasSetOffset(canvas, linePtr->arrowGC, &linePtr->outline.tsoffset); |
|
|
} |
|
|
if (numPoints>1) { |
|
|
XDrawLines(display, drawable, linePtr->outline.gc, pointPtr, numPoints, |
|
|
CoordModeOrigin); |
|
|
} else { |
|
|
int intwidth = (int) (linewidth + 0.5); |
|
|
if (intwidth<1) { |
|
|
intwidth=1; |
|
|
} |
|
|
XFillArc(display, drawable, linePtr->outline.gc, |
|
|
pointPtr->x - intwidth/2, pointPtr->y - intwidth/2, |
|
|
(unsigned int)intwidth+1, (unsigned int)intwidth+1, 0, 64*360); |
|
|
} |
|
|
if (pointPtr != staticPoints) { |
|
|
ckfree((char *) pointPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Display arrowheads, if they are wanted. |
|
|
*/ |
|
|
|
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
TkFillPolygon(canvas, linePtr->firstArrowPtr, PTS_IN_ARROW, |
|
|
display, drawable, linePtr->arrowGC, NULL); |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
TkFillPolygon(canvas, linePtr->lastArrowPtr, PTS_IN_ARROW, |
|
|
display, drawable, linePtr->arrowGC, NULL); |
|
|
} |
|
|
if (Tk_ResetOutlineGC(canvas, itemPtr, &(linePtr->outline))) { |
|
|
XSetTSOrigin(display, linePtr->arrowGC, 0, 0); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* LineInsert -- |
|
|
* |
|
|
* Insert coords into a line item at a given index. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The coords in the given item is modified. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
LineInsert(canvas, itemPtr, beforeThis, obj) |
|
|
Tk_Canvas canvas; /* Canvas containing text item. */ |
|
|
Tk_Item *itemPtr; /* Line item to be modified. */ |
|
|
int beforeThis; /* Index before which new coordinates |
|
|
* are to be inserted. */ |
|
|
Tcl_Obj *obj; /* New coordinates to be inserted. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
int length, argc, i; |
|
|
double *new, *coordPtr; |
|
|
Tk_State state = itemPtr->state; |
|
|
Tcl_Obj **objv; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
if (!obj || (Tcl_ListObjGetElements((Tcl_Interp *) NULL, obj, &argc, &objv) != TCL_OK) |
|
|
|| !argc || argc&1) { |
|
|
return; |
|
|
} |
|
|
length = 2*linePtr->numPoints; |
|
|
if (beforeThis < 0) { |
|
|
beforeThis = 0; |
|
|
} |
|
|
if (beforeThis > length) { |
|
|
beforeThis = length; |
|
|
} |
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
linePtr->coordPtr[0] = linePtr->firstArrowPtr[0]; |
|
|
linePtr->coordPtr[1] = linePtr->firstArrowPtr[1]; |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
linePtr->coordPtr[length-2] = linePtr->lastArrowPtr[0]; |
|
|
linePtr->coordPtr[length-1] = linePtr->lastArrowPtr[1]; |
|
|
} |
|
|
new = (double *) ckalloc((unsigned)(sizeof(double) * (length + argc))); |
|
|
for(i=0; i<beforeThis; i++) { |
|
|
new[i] = linePtr->coordPtr[i]; |
|
|
} |
|
|
for(i=0; i<argc; i++) { |
|
|
if (Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,objv[i], |
|
|
new+(i+beforeThis))!=TCL_OK) { |
|
|
Tcl_ResetResult(((TkCanvas *)canvas)->interp); |
|
|
ckfree((char *) new); |
|
|
return; |
|
|
} |
|
|
} |
|
|
|
|
|
for(i=beforeThis; i<length; i++) { |
|
|
new[i+argc] = linePtr->coordPtr[i]; |
|
|
} |
|
|
if(linePtr->coordPtr) ckfree((char *)linePtr->coordPtr); |
|
|
linePtr->coordPtr = new; |
|
|
linePtr->numPoints = (length + argc)/2; |
|
|
|
|
|
if ((length>3) && (state != TK_STATE_HIDDEN)) { |
|
|
/* |
|
|
* This is some optimizing code that will result that only the part |
|
|
* of the polygon that changed (and the objects that are overlapping |
|
|
* with that part) need to be redrawn. A special flag is set that |
|
|
* instructs the general canvas code not to redraw the whole |
|
|
* object. If this flag is not set, the canvas will do the redrawing, |
|
|
* otherwise I have to do it here. |
|
|
*/ |
|
|
itemPtr->redraw_flags |= TK_ITEM_DONT_REDRAW; |
|
|
|
|
|
if (beforeThis>0) {beforeThis -= 2; argc+=2; } |
|
|
if ((beforeThis+argc)<length) argc+=2; |
|
|
if (linePtr->smooth) { |
|
|
if(beforeThis>0) { |
|
|
beforeThis-=2; argc+=2; |
|
|
} |
|
|
if((beforeThis+argc+2)<length) { |
|
|
argc+=2; |
|
|
} |
|
|
} |
|
|
itemPtr->x1 = itemPtr->x2 = (int) linePtr->coordPtr[beforeThis]; |
|
|
itemPtr->y1 = itemPtr->y2 = (int) linePtr->coordPtr[beforeThis+1]; |
|
|
if ((linePtr->firstArrowPtr != NULL) && (beforeThis<1)) { |
|
|
/* include old first arrow */ |
|
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
} |
|
|
} |
|
|
if ((linePtr->lastArrowPtr != NULL) && ((beforeThis+argc)>=length)) { |
|
|
/* include old last arrow */ |
|
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
} |
|
|
} |
|
|
coordPtr = linePtr->coordPtr+beforeThis+2; |
|
|
for(i=2; i<argc; i+=2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
coordPtr+=2; |
|
|
} |
|
|
} |
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
ckfree((char *) linePtr->firstArrowPtr); |
|
|
linePtr->firstArrowPtr = NULL; |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
ckfree((char *) linePtr->lastArrowPtr); |
|
|
linePtr->lastArrowPtr = NULL; |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_NONE) { |
|
|
ConfigureArrows(canvas, linePtr); |
|
|
} |
|
|
|
|
|
if(itemPtr->redraw_flags & TK_ITEM_DONT_REDRAW) { |
|
|
double width; |
|
|
int intWidth; |
|
|
if ((linePtr->firstArrowPtr != NULL) && (beforeThis>2)) { |
|
|
/* include new first arrow */ |
|
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
} |
|
|
} |
|
|
if ((linePtr->lastArrowPtr != NULL) && ((beforeThis+argc)<(length-2))) { |
|
|
/* include new right arrow */ |
|
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
} |
|
|
} |
|
|
width = linePtr->outline.width; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (linePtr->outline.activeWidth>width) { |
|
|
width = linePtr->outline.activeWidth; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (linePtr->outline.disabledWidth>0) { |
|
|
width = linePtr->outline.disabledWidth; |
|
|
} |
|
|
} |
|
|
intWidth = (int) (width + 0.5); |
|
|
if (intWidth < 1) { |
|
|
intWidth = 1; |
|
|
} |
|
|
itemPtr->x1 -= intWidth; itemPtr->y1 -= intWidth; |
|
|
itemPtr->x2 += intWidth; itemPtr->y2 += intWidth; |
|
|
Tk_CanvasEventuallyRedraw(canvas, itemPtr->x1, itemPtr->y1, |
|
|
itemPtr->x2, itemPtr->y2); |
|
|
} |
|
|
|
|
|
ComputeLineBbox(canvas, linePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* LineDeleteCoords -- |
|
|
* |
|
|
* Delete one or more coordinates from a line item. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Characters between "first" and "last", inclusive, get |
|
|
* deleted from itemPtr. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
LineDeleteCoords(canvas, itemPtr, first, last) |
|
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
|
|
Tk_Item *itemPtr; /* Item in which to delete characters. */ |
|
|
int first; /* Index of first character to delete. */ |
|
|
int last; /* Index of last character to delete. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
int count, i, first1, last1; |
|
|
int length = 2*linePtr->numPoints; |
|
|
double *coordPtr; |
|
|
Tk_State state = itemPtr->state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
first &= -2; |
|
|
last &= -2; |
|
|
|
|
|
if (first < 0) { |
|
|
first = 0; |
|
|
} |
|
|
if (last >= length) { |
|
|
last = length-2; |
|
|
} |
|
|
if (first > last) { |
|
|
return; |
|
|
} |
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
linePtr->coordPtr[0] = linePtr->firstArrowPtr[0]; |
|
|
linePtr->coordPtr[1] = linePtr->firstArrowPtr[1]; |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
linePtr->coordPtr[length-2] = linePtr->lastArrowPtr[0]; |
|
|
linePtr->coordPtr[length-1] = linePtr->lastArrowPtr[1]; |
|
|
} |
|
|
first1 = first; last1 = last; |
|
|
if(first1>0) first1 -= 2; |
|
|
if(last1<length-2) last1 += 2; |
|
|
if (linePtr->smooth) { |
|
|
if(first1>0) first1 -= 2; |
|
|
if(last1<length-2) last1 += 2; |
|
|
} |
|
|
|
|
|
if((first1<2) && (last1 >= length-2)) { |
|
|
/* |
|
|
* This is some optimizing code that will result that only the part |
|
|
* of the line that changed (and the objects that are overlapping |
|
|
* with that part) need to be redrawn. A special flag is set that |
|
|
* instructs the general canvas code not to redraw the whole |
|
|
* object. If this flag is set, the redrawing has to be done here, |
|
|
* otherwise the general Canvas code will take care of it. |
|
|
*/ |
|
|
|
|
|
itemPtr->redraw_flags |= TK_ITEM_DONT_REDRAW; |
|
|
itemPtr->x1 = itemPtr->x2 = (int) linePtr->coordPtr[first1]; |
|
|
itemPtr->y1 = itemPtr->y2 = (int) linePtr->coordPtr[first1+1]; |
|
|
if ((linePtr->firstArrowPtr != NULL) && (first1<2)) { |
|
|
/* include old first arrow */ |
|
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
} |
|
|
} |
|
|
if ((linePtr->lastArrowPtr != NULL) && (last1>=length-2)) { |
|
|
/* include old last arrow */ |
|
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
} |
|
|
} |
|
|
coordPtr = linePtr->coordPtr+first1+2; |
|
|
for (i=first1+2; i<=last1; i+=2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
coordPtr+=2; |
|
|
} |
|
|
} |
|
|
|
|
|
count = last + 2 - first; |
|
|
for (i=last+2; i<length; i++) { |
|
|
linePtr->coordPtr[i-count] = linePtr->coordPtr[i]; |
|
|
} |
|
|
linePtr->numPoints -= count/2; |
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
ckfree((char *) linePtr->firstArrowPtr); |
|
|
linePtr->firstArrowPtr = NULL; |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
ckfree((char *) linePtr->lastArrowPtr); |
|
|
linePtr->lastArrowPtr = NULL; |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_NONE) { |
|
|
ConfigureArrows(canvas, linePtr); |
|
|
} |
|
|
if(itemPtr->redraw_flags & TK_ITEM_DONT_REDRAW) { |
|
|
double width; |
|
|
int intWidth; |
|
|
if ((linePtr->firstArrowPtr != NULL) && (first1<4)) { |
|
|
/* include new first arrow */ |
|
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
} |
|
|
} |
|
|
if ((linePtr->lastArrowPtr != NULL) && (last1>(length-4))) { |
|
|
/* include new right arrow */ |
|
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
TkIncludePoint(itemPtr, coordPtr); |
|
|
} |
|
|
} |
|
|
width = linePtr->outline.width; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (linePtr->outline.activeWidth>width) { |
|
|
width = linePtr->outline.activeWidth; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (linePtr->outline.disabledWidth>0) { |
|
|
width = linePtr->outline.disabledWidth; |
|
|
} |
|
|
} |
|
|
intWidth = (int) (width + 0.5); |
|
|
if (intWidth < 1) { |
|
|
intWidth = 1; |
|
|
} |
|
|
itemPtr->x1 -= intWidth; itemPtr->y1 -= intWidth; |
|
|
itemPtr->x2 += intWidth; itemPtr->y2 += intWidth; |
|
|
Tk_CanvasEventuallyRedraw(canvas, itemPtr->x1, itemPtr->y1, |
|
|
itemPtr->x2, itemPtr->y2); |
|
|
} |
|
|
ComputeLineBbox(canvas, linePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* LineToPoint -- |
|
|
* |
|
|
* Computes the distance from a given point to a given |
|
|
* line, in canvas units. |
|
|
* |
|
|
* Results: |
|
|
* The return value is 0 if the point whose x and y coordinates |
|
|
* are pointPtr[0] and pointPtr[1] is inside the line. If the |
|
|
* point isn't inside the line then the return value is the |
|
|
* distance from the point to the line. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static double |
|
|
LineToPoint(canvas, itemPtr, pointPtr) |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item to check against point. */ |
|
|
double *pointPtr; /* Pointer to x and y coordinates. */ |
|
|
{ |
|
|
Tk_State state = itemPtr->state; |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
double *coordPtr, *linePoints; |
|
|
double staticSpace[2*MAX_STATIC_POINTS]; |
|
|
double poly[10]; |
|
|
double bestDist, dist, width; |
|
|
int numPoints, count; |
|
|
int changedMiterToBevel; /* Non-zero means that a mitered corner |
|
|
* had to be treated as beveled after all |
|
|
* because the angle was < 11 degrees. */ |
|
|
|
|
|
bestDist = 1.0e36; |
|
|
|
|
|
/* |
|
|
* Handle smoothed lines by generating an expanded set of points |
|
|
* against which to do the check. |
|
|
*/ |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
width = linePtr->outline.width; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (linePtr->outline.activeWidth>width) { |
|
|
width = linePtr->outline.activeWidth; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (linePtr->outline.disabledWidth>0) { |
|
|
width = linePtr->outline.disabledWidth; |
|
|
} |
|
|
} |
|
|
|
|
|
if ((linePtr->smooth) && (linePtr->numPoints > 2)) { |
|
|
numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, |
|
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
|
|
(double *) NULL); |
|
|
if (numPoints <= MAX_STATIC_POINTS) { |
|
|
linePoints = staticSpace; |
|
|
} else { |
|
|
linePoints = (double *) ckalloc((unsigned) |
|
|
(2*numPoints*sizeof(double))); |
|
|
} |
|
|
numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, |
|
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
|
|
linePoints); |
|
|
} else { |
|
|
numPoints = linePtr->numPoints; |
|
|
linePoints = linePtr->coordPtr; |
|
|
} |
|
|
|
|
|
if (width < 1.0) { |
|
|
width = 1.0; |
|
|
} |
|
|
|
|
|
if (!numPoints || itemPtr->state==TK_STATE_HIDDEN) { |
|
|
return bestDist; |
|
|
} else if (numPoints == 1) { |
|
|
bestDist = hypot(linePoints[0] - pointPtr[0], linePoints[1] - pointPtr[1]) |
|
|
- width/2.0; |
|
|
if (bestDist < 0) bestDist = 0; |
|
|
return bestDist; |
|
|
} |
|
|
|
|
|
/* |
|
|
* The overall idea is to iterate through all of the edges of |
|
|
* the line, computing a polygon for each edge and testing the |
|
|
* point against that polygon. In addition, there are additional |
|
|
* tests to deal with rounded joints and caps. |
|
|
*/ |
|
|
|
|
|
changedMiterToBevel = 0; |
|
|
for (count = numPoints, coordPtr = linePoints; count >= 2; |
|
|
count--, coordPtr += 2) { |
|
|
|
|
|
/* |
|
|
* If rounding is done around the first point then compute |
|
|
* the distance between the point and the point. |
|
|
*/ |
|
|
|
|
|
if (((linePtr->capStyle == CapRound) && (count == numPoints)) |
|
|
|| ((linePtr->joinStyle == JoinRound) |
|
|
&& (count != numPoints))) { |
|
|
dist = hypot(coordPtr[0] - pointPtr[0], coordPtr[1] - pointPtr[1]) |
|
|
- width/2.0; |
|
|
if (dist <= 0.0) { |
|
|
bestDist = 0.0; |
|
|
goto done; |
|
|
} else if (dist < bestDist) { |
|
|
bestDist = dist; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Compute the polygonal shape corresponding to this edge, |
|
|
* consisting of two points for the first point of the edge |
|
|
* and two points for the last point of the edge. |
|
|
*/ |
|
|
|
|
|
if (count == numPoints) { |
|
|
TkGetButtPoints(coordPtr+2, coordPtr, width, |
|
|
linePtr->capStyle == CapProjecting, poly, poly+2); |
|
|
} else if ((linePtr->joinStyle == JoinMiter) && !changedMiterToBevel) { |
|
|
poly[0] = poly[6]; |
|
|
poly[1] = poly[7]; |
|
|
poly[2] = poly[4]; |
|
|
poly[3] = poly[5]; |
|
|
} else { |
|
|
TkGetButtPoints(coordPtr+2, coordPtr, width, 0, |
|
|
poly, poly+2); |
|
|
|
|
|
/* |
|
|
* If this line uses beveled joints, then check the distance |
|
|
* to a polygon comprising the last two points of the previous |
|
|
* polygon and the first two from this polygon; this checks |
|
|
* the wedges that fill the mitered joint. |
|
|
*/ |
|
|
|
|
|
if ((linePtr->joinStyle == JoinBevel) || changedMiterToBevel) { |
|
|
poly[8] = poly[0]; |
|
|
poly[9] = poly[1]; |
|
|
dist = TkPolygonToPoint(poly, 5, pointPtr); |
|
|
if (dist <= 0.0) { |
|
|
bestDist = 0.0; |
|
|
goto done; |
|
|
} else if (dist < bestDist) { |
|
|
bestDist = dist; |
|
|
} |
|
|
changedMiterToBevel = 0; |
|
|
} |
|
|
} |
|
|
if (count == 2) { |
|
|
TkGetButtPoints(coordPtr, coordPtr+2, width, |
|
|
linePtr->capStyle == CapProjecting, poly+4, poly+6); |
|
|
} else if (linePtr->joinStyle == JoinMiter) { |
|
|
if (TkGetMiterPoints(coordPtr, coordPtr+2, coordPtr+4, |
|
|
width, poly+4, poly+6) == 0) { |
|
|
changedMiterToBevel = 1; |
|
|
TkGetButtPoints(coordPtr, coordPtr+2, width, |
|
|
0, poly+4, poly+6); |
|
|
} |
|
|
} else { |
|
|
TkGetButtPoints(coordPtr, coordPtr+2, width, 0, |
|
|
poly+4, poly+6); |
|
|
} |
|
|
poly[8] = poly[0]; |
|
|
poly[9] = poly[1]; |
|
|
dist = TkPolygonToPoint(poly, 5, pointPtr); |
|
|
if (dist <= 0.0) { |
|
|
bestDist = 0.0; |
|
|
goto done; |
|
|
} else if (dist < bestDist) { |
|
|
bestDist = dist; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* If caps are rounded, check the distance to the cap around the |
|
|
* final end point of the line. |
|
|
*/ |
|
|
|
|
|
if (linePtr->capStyle == CapRound) { |
|
|
dist = hypot(coordPtr[0] - pointPtr[0], coordPtr[1] - pointPtr[1]) |
|
|
- width/2.0; |
|
|
if (dist <= 0.0) { |
|
|
bestDist = 0.0; |
|
|
goto done; |
|
|
} else if (dist < bestDist) { |
|
|
bestDist = dist; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* If there are arrowheads, check the distance to the arrowheads. |
|
|
*/ |
|
|
|
|
|
if (linePtr->arrow != ARROWS_NONE) { |
|
|
if (linePtr->arrow != ARROWS_LAST) { |
|
|
dist = TkPolygonToPoint(linePtr->firstArrowPtr, PTS_IN_ARROW, |
|
|
pointPtr); |
|
|
if (dist <= 0.0) { |
|
|
bestDist = 0.0; |
|
|
goto done; |
|
|
} else if (dist < bestDist) { |
|
|
bestDist = dist; |
|
|
} |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_FIRST) { |
|
|
dist = TkPolygonToPoint(linePtr->lastArrowPtr, PTS_IN_ARROW, |
|
|
pointPtr); |
|
|
if (dist <= 0.0) { |
|
|
bestDist = 0.0; |
|
|
goto done; |
|
|
} else if (dist < bestDist) { |
|
|
bestDist = dist; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
done: |
|
|
if ((linePoints != staticSpace) && (linePoints != linePtr->coordPtr)) { |
|
|
ckfree((char *) linePoints); |
|
|
} |
|
|
return bestDist; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* LineToArea -- |
|
|
* |
|
|
* This procedure is called to determine whether an item |
|
|
* lies entirely inside, entirely outside, or overlapping |
|
|
* a given rectangular area. |
|
|
* |
|
|
* Results: |
|
|
* -1 is returned if the item is entirely outside the |
|
|
* area, 0 if it overlaps, and 1 if it is entirely |
|
|
* inside the given area. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static int |
|
|
LineToArea(canvas, itemPtr, rectPtr) |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item to check against line. */ |
|
|
double *rectPtr; |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
double staticSpace[2*MAX_STATIC_POINTS]; |
|
|
double *linePoints; |
|
|
int numPoints, result; |
|
|
double radius, width; |
|
|
Tk_State state = itemPtr->state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
width = linePtr->outline.width; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (linePtr->outline.activeWidth>width) { |
|
|
width = linePtr->outline.activeWidth; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (linePtr->outline.disabledWidth>0) { |
|
|
width = linePtr->outline.disabledWidth; |
|
|
} |
|
|
} |
|
|
|
|
|
radius = (width+1.0)/2.0; |
|
|
|
|
|
if ((state==TK_STATE_HIDDEN) || !linePtr->numPoints) { |
|
|
return -1; |
|
|
} else if (linePtr->numPoints == 1) { |
|
|
double oval[4]; |
|
|
oval[0] = linePtr->coordPtr[0]-radius; |
|
|
oval[1] = linePtr->coordPtr[1]-radius; |
|
|
oval[2] = linePtr->coordPtr[0]+radius; |
|
|
oval[3] = linePtr->coordPtr[1]+radius; |
|
|
return TkOvalToArea(oval, rectPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Handle smoothed lines by generating an expanded set of points |
|
|
* against which to do the check. |
|
|
*/ |
|
|
|
|
|
if ((linePtr->smooth) && (linePtr->numPoints > 2)) { |
|
|
numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, |
|
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
|
|
(double *) NULL); |
|
|
if (numPoints <= MAX_STATIC_POINTS) { |
|
|
linePoints = staticSpace; |
|
|
} else { |
|
|
linePoints = (double *) ckalloc((unsigned) |
|
|
(2*numPoints*sizeof(double))); |
|
|
} |
|
|
numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, |
|
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
|
|
linePoints); |
|
|
} else { |
|
|
numPoints = linePtr->numPoints; |
|
|
linePoints = linePtr->coordPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Check the segments of the line. |
|
|
*/ |
|
|
|
|
|
if (width < 1.0) { |
|
|
width = 1.0; |
|
|
} |
|
|
|
|
|
result = TkThickPolyLineToArea(linePoints, numPoints, |
|
|
width, linePtr->capStyle, linePtr->joinStyle, |
|
|
rectPtr); |
|
|
if (result == 0) { |
|
|
goto done; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Check arrowheads, if any. |
|
|
*/ |
|
|
|
|
|
if (linePtr->arrow != ARROWS_NONE) { |
|
|
if (linePtr->arrow != ARROWS_LAST) { |
|
|
if (TkPolygonToArea(linePtr->firstArrowPtr, PTS_IN_ARROW, |
|
|
rectPtr) != result) { |
|
|
result = 0; |
|
|
goto done; |
|
|
} |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_FIRST) { |
|
|
if (TkPolygonToArea(linePtr->lastArrowPtr, PTS_IN_ARROW, |
|
|
rectPtr) != result) { |
|
|
result = 0; |
|
|
goto done; |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
done: |
|
|
if ((linePoints != staticSpace) && (linePoints != linePtr->coordPtr)) { |
|
|
ckfree((char *) linePoints); |
|
|
} |
|
|
return result; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ScaleLine -- |
|
|
* |
|
|
* This procedure is invoked to rescale a line item. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The line referred to by itemPtr is rescaled so that the |
|
|
* following transformation is applied to all point |
|
|
* coordinates: |
|
|
* x' = originX + scaleX*(x-originX) |
|
|
* y' = originY + scaleY*(y-originY) |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ScaleLine(canvas, itemPtr, originX, originY, scaleX, scaleY) |
|
|
Tk_Canvas canvas; /* Canvas containing line. */ |
|
|
Tk_Item *itemPtr; /* Line to be scaled. */ |
|
|
double originX, originY; /* Origin about which to scale rect. */ |
|
|
double scaleX; /* Amount to scale in X direction. */ |
|
|
double scaleY; /* Amount to scale in Y direction. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
double *coordPtr; |
|
|
int i; |
|
|
|
|
|
/* |
|
|
* Delete any arrowheads before scaling all the points (so that |
|
|
* the end-points of the line get restored). |
|
|
*/ |
|
|
|
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
linePtr->coordPtr[0] = linePtr->firstArrowPtr[0]; |
|
|
linePtr->coordPtr[1] = linePtr->firstArrowPtr[1]; |
|
|
ckfree((char *) linePtr->firstArrowPtr); |
|
|
linePtr->firstArrowPtr = NULL; |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
int i; |
|
|
|
|
|
i = 2*(linePtr->numPoints-1); |
|
|
linePtr->coordPtr[i] = linePtr->lastArrowPtr[0]; |
|
|
linePtr->coordPtr[i+1] = linePtr->lastArrowPtr[1]; |
|
|
ckfree((char *) linePtr->lastArrowPtr); |
|
|
linePtr->lastArrowPtr = NULL; |
|
|
} |
|
|
for (i = 0, coordPtr = linePtr->coordPtr; i < linePtr->numPoints; |
|
|
i++, coordPtr += 2) { |
|
|
coordPtr[0] = originX + scaleX*(*coordPtr - originX); |
|
|
coordPtr[1] = originY + scaleY*(coordPtr[1] - originY); |
|
|
} |
|
|
if (linePtr->arrow != ARROWS_NONE) { |
|
|
ConfigureArrows(canvas, linePtr); |
|
|
} |
|
|
ComputeLineBbox(canvas, linePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* GetLineIndex -- |
|
|
* |
|
|
* Parse an index into a line item and return either its value |
|
|
* or an error. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl result. If all went well, then *indexPtr is |
|
|
* filled in with the index (into itemPtr) corresponding to |
|
|
* string. Otherwise an error message is left in |
|
|
* interp->result. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
GetLineIndex(interp, canvas, itemPtr, obj, indexPtr) |
|
|
Tcl_Interp *interp; /* Used for error reporting. */ |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item for which the index is being |
|
|
* specified. */ |
|
|
Tcl_Obj *obj; /* Specification of a particular coord |
|
|
* in itemPtr's line. */ |
|
|
int *indexPtr; /* Where to store converted index. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
size_t length; |
|
|
char *string = Tcl_GetStringFromObj(obj, (int *) &length); |
|
|
|
|
|
if (string[0] == 'e') { |
|
|
if (strncmp(string, "end", length) == 0) { |
|
|
*indexPtr = 2*linePtr->numPoints; |
|
|
} else { |
|
|
badIndex: |
|
|
|
|
|
/* |
|
|
* Some of the paths here leave messages in interp->result, |
|
|
* so we have to clear it out before storing our own message. |
|
|
*/ |
|
|
|
|
|
Tcl_SetResult(interp, (char *) NULL, TCL_STATIC); |
|
|
Tcl_AppendResult(interp, "bad index \"", string, "\"", |
|
|
(char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else if (string[0] == '@') { |
|
|
int i; |
|
|
double x ,y, bestDist, dist, *coordPtr; |
|
|
char *end, *p; |
|
|
|
|
|
p = string+1; |
|
|
x = strtod(p, &end); |
|
|
if ((end == p) || (*end != ',')) { |
|
|
goto badIndex; |
|
|
} |
|
|
p = end+1; |
|
|
y = strtod(p, &end); |
|
|
if ((end == p) || (*end != 0)) { |
|
|
goto badIndex; |
|
|
} |
|
|
bestDist = 1.0e36; |
|
|
coordPtr = linePtr->coordPtr; |
|
|
*indexPtr = 0; |
|
|
for(i=0; i<linePtr->numPoints; i++) { |
|
|
dist = hypot(coordPtr[0] - x, coordPtr[1] - y); |
|
|
if (dist<bestDist) { |
|
|
bestDist = dist; |
|
|
*indexPtr = 2*i; |
|
|
} |
|
|
coordPtr += 2; |
|
|
} |
|
|
} else { |
|
|
if (Tcl_GetIntFromObj(interp, obj, indexPtr) != TCL_OK) { |
|
|
goto badIndex; |
|
|
} |
|
|
*indexPtr &= -2; /* if index is odd, make it even */ |
|
|
if (*indexPtr < 0){ |
|
|
*indexPtr = 0; |
|
|
} else if (*indexPtr > (2*linePtr->numPoints)) { |
|
|
*indexPtr = (2*linePtr->numPoints); |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TranslateLine -- |
|
|
* |
|
|
* This procedure is called to move a line by a given amount. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The position of the line is offset by (xDelta, yDelta), and |
|
|
* the bounding box is updated in the generic part of the item |
|
|
* structure. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
TranslateLine(canvas, itemPtr, deltaX, deltaY) |
|
|
Tk_Canvas canvas; /* Canvas containing item. */ |
|
|
Tk_Item *itemPtr; /* Item that is being moved. */ |
|
|
double deltaX, deltaY; /* Amount by which item is to be |
|
|
* moved. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
double *coordPtr; |
|
|
int i; |
|
|
|
|
|
for (i = 0, coordPtr = linePtr->coordPtr; i < linePtr->numPoints; |
|
|
i++, coordPtr += 2) { |
|
|
coordPtr[0] += deltaX; |
|
|
coordPtr[1] += deltaY; |
|
|
} |
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
coordPtr[0] += deltaX; |
|
|
coordPtr[1] += deltaY; |
|
|
} |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
|
|
i++, coordPtr += 2) { |
|
|
coordPtr[0] += deltaX; |
|
|
coordPtr[1] += deltaY; |
|
|
} |
|
|
} |
|
|
ComputeLineBbox(canvas, linePtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ParseArrowShape -- |
|
|
* |
|
|
* This procedure is called back during option parsing to |
|
|
* parse arrow shape information. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a standard Tcl result: TCL_OK means |
|
|
* that the arrow shape information was parsed ok, and |
|
|
* TCL_ERROR means it couldn't be parsed. |
|
|
* |
|
|
* Side effects: |
|
|
* Arrow information in recordPtr is updated. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static int |
|
|
ParseArrowShape(clientData, interp, tkwin, value, recordPtr, offset) |
|
|
ClientData clientData; /* Not used. */ |
|
|
Tcl_Interp *interp; /* Used for error reporting. */ |
|
|
Tk_Window tkwin; /* Not used. */ |
|
|
CONST char *value; /* Textual specification of arrow shape. */ |
|
|
char *recordPtr; /* Pointer to item record in which to |
|
|
* store arrow information. */ |
|
|
int offset; /* Offset of shape information in widget |
|
|
* record. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) recordPtr; |
|
|
double a, b, c; |
|
|
int argc; |
|
|
char **argv = NULL; |
|
|
|
|
|
if (offset != Tk_Offset(LineItem, arrowShapeA)) { |
|
|
panic("ParseArrowShape received bogus offset"); |
|
|
} |
|
|
|
|
|
if (Tcl_SplitList(interp, (char *) value, &argc, &argv) != TCL_OK) { |
|
|
syntaxError: |
|
|
Tcl_ResetResult(interp); |
|
|
Tcl_AppendResult(interp, "bad arrow shape \"", value, |
|
|
"\": must be list with three numbers", (char *) NULL); |
|
|
if (argv != NULL) { |
|
|
ckfree((char *) argv); |
|
|
} |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (argc != 3) { |
|
|
goto syntaxError; |
|
|
} |
|
|
if ((Tk_CanvasGetCoord(interp, linePtr->canvas, argv[0], &a) != TCL_OK) |
|
|
|| (Tk_CanvasGetCoord(interp, linePtr->canvas, argv[1], &b) |
|
|
!= TCL_OK) |
|
|
|| (Tk_CanvasGetCoord(interp, linePtr->canvas, argv[2], &c) |
|
|
!= TCL_OK)) { |
|
|
goto syntaxError; |
|
|
} |
|
|
linePtr->arrowShapeA = (float)a; |
|
|
linePtr->arrowShapeB = (float)b; |
|
|
linePtr->arrowShapeC = (float)c; |
|
|
ckfree((char *) argv); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* PrintArrowShape -- |
|
|
* |
|
|
* This procedure is a callback invoked by the configuration |
|
|
* code to return a printable value describing an arrow shape. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static char * |
|
|
PrintArrowShape(clientData, tkwin, recordPtr, offset, freeProcPtr) |
|
|
ClientData clientData; /* Not used. */ |
|
|
Tk_Window tkwin; /* Window associated with linePtr's widget. */ |
|
|
char *recordPtr; /* Pointer to item record containing current |
|
|
* shape information. */ |
|
|
int offset; /* Offset of arrow information in record. */ |
|
|
Tcl_FreeProc **freeProcPtr; /* Store address of procedure to call to |
|
|
* free string here. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) recordPtr; |
|
|
char *buffer; |
|
|
|
|
|
buffer = (char *) ckalloc(120); |
|
|
sprintf(buffer, "%.5g %.5g %.5g", linePtr->arrowShapeA, |
|
|
linePtr->arrowShapeB, linePtr->arrowShapeC); |
|
|
*freeProcPtr = TCL_DYNAMIC; |
|
|
return buffer; |
|
|
} |
|
|
|
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ArrowParseProc -- |
|
|
* |
|
|
* This procedure is invoked during option processing to handle |
|
|
* the "-arrow" option. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl return value. |
|
|
* |
|
|
* Side effects: |
|
|
* The arrow for a given item gets replaced by the arrow |
|
|
* indicated in the value argument. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
ArrowParseProc(clientData, interp, tkwin, value, widgRec, offset) |
|
|
ClientData clientData; /* some flags.*/ |
|
|
Tcl_Interp *interp; /* Used for reporting errors. */ |
|
|
Tk_Window tkwin; /* Window containing canvas widget. */ |
|
|
CONST char *value; /* Value of option. */ |
|
|
char *widgRec; /* Pointer to record for item. */ |
|
|
int offset; /* Offset into item. */ |
|
|
{ |
|
|
int c; |
|
|
size_t length; |
|
|
|
|
|
register Arrows *arrowPtr = (Arrows *) (widgRec + offset); |
|
|
|
|
|
if(value == NULL || *value == 0) { |
|
|
*arrowPtr = ARROWS_NONE; |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
c = value[0]; |
|
|
length = strlen(value); |
|
|
|
|
|
if ((c == 'n') && (strncmp(value, "none", length) == 0)) { |
|
|
*arrowPtr = ARROWS_NONE; |
|
|
return TCL_OK; |
|
|
} |
|
|
if ((c == 'f') && (strncmp(value, "first", length) == 0)) { |
|
|
*arrowPtr = ARROWS_FIRST; |
|
|
return TCL_OK; |
|
|
} |
|
|
if ((c == 'l') && (strncmp(value, "last", length) == 0)) { |
|
|
*arrowPtr = ARROWS_LAST; |
|
|
return TCL_OK; |
|
|
} |
|
|
if ((c == 'b') && (strncmp(value, "both", length) == 0)) { |
|
|
*arrowPtr = ARROWS_BOTH; |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
Tcl_AppendResult(interp, "bad arrow spec \"", value, |
|
|
"\": must be none, first, last, or both", |
|
|
(char *) NULL); |
|
|
*arrowPtr = ARROWS_NONE; |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ArrowPrintProc -- |
|
|
* |
|
|
* This procedure is invoked by the Tk configuration code |
|
|
* to produce a printable string for the "-arrow" |
|
|
* configuration option. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a string describing the arrows for |
|
|
* the item referred to by "widgRec". In addition, *freeProcPtr |
|
|
* is filled in with the address of a procedure to call to free |
|
|
* the result string when it's no longer needed (or NULL to |
|
|
* indicate that the string doesn't need to be freed). |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static char * |
|
|
ArrowPrintProc(clientData, tkwin, widgRec, offset, freeProcPtr) |
|
|
ClientData clientData; /* Ignored. */ |
|
|
Tk_Window tkwin; /* Window containing canvas widget. */ |
|
|
char *widgRec; /* Pointer to record for item. */ |
|
|
int offset; /* Offset into item. */ |
|
|
Tcl_FreeProc **freeProcPtr; /* Pointer to variable to fill in with |
|
|
* information about how to reclaim |
|
|
* storage for return string. */ |
|
|
{ |
|
|
register Arrows *arrowPtr = (Arrows *) (widgRec + offset); |
|
|
|
|
|
switch (*arrowPtr) { |
|
|
case ARROWS_FIRST: |
|
|
return "first"; |
|
|
case ARROWS_LAST: |
|
|
return "last"; |
|
|
case ARROWS_BOTH: |
|
|
return "both"; |
|
|
default: |
|
|
return "none"; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ConfigureArrows -- |
|
|
* |
|
|
* If arrowheads have been requested for a line, this |
|
|
* procedure makes arrangements for the arrowheads. |
|
|
* |
|
|
* Results: |
|
|
* Always returns TCL_OK. |
|
|
* |
|
|
* Side effects: |
|
|
* Information in linePtr is set up for one or two arrowheads. |
|
|
* the firstArrowPtr and lastArrowPtr polygons are allocated |
|
|
* and initialized, if need be, and the end points of the line |
|
|
* are adjusted so that a thick line doesn't stick out past |
|
|
* the arrowheads. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static int |
|
|
ConfigureArrows(canvas, linePtr) |
|
|
Tk_Canvas canvas; /* Canvas in which arrows will be |
|
|
* displayed (interp and tkwin |
|
|
* fields are needed). */ |
|
|
LineItem *linePtr; /* Item to configure for arrows. */ |
|
|
{ |
|
|
double *poly, *coordPtr; |
|
|
double dx, dy, length, sinTheta, cosTheta, temp; |
|
|
double fracHeight; /* Line width as fraction of |
|
|
* arrowhead width. */ |
|
|
double backup; /* Distance to backup end points |
|
|
* so the line ends in the middle |
|
|
* of the arrowhead. */ |
|
|
double vertX, vertY; /* Position of arrowhead vertex. */ |
|
|
double shapeA, shapeB, shapeC; /* Adjusted coordinates (see |
|
|
* explanation below). */ |
|
|
double width; |
|
|
Tk_State state = linePtr->header.state; |
|
|
|
|
|
if (linePtr->numPoints <2) { |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
width = linePtr->outline.width; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)linePtr) { |
|
|
if (linePtr->outline.activeWidth>width) { |
|
|
width = linePtr->outline.activeWidth; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (linePtr->outline.disabledWidth>0) { |
|
|
width = linePtr->outline.disabledWidth; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* The code below makes a tiny increase in the shape parameters |
|
|
* for the line. This is a bit of a hack, but it seems to result |
|
|
* in displays that more closely approximate the specified parameters. |
|
|
* Without the adjustment, the arrows come out smaller than expected. |
|
|
*/ |
|
|
|
|
|
shapeA = linePtr->arrowShapeA + 0.001; |
|
|
shapeB = linePtr->arrowShapeB + 0.001; |
|
|
shapeC = linePtr->arrowShapeC + width/2.0 + 0.001; |
|
|
|
|
|
/* |
|
|
* If there's an arrowhead on the first point of the line, compute |
|
|
* its polygon and adjust the first point of the line so that the |
|
|
* line doesn't stick out past the leading edge of the arrowhead. |
|
|
*/ |
|
|
|
|
|
fracHeight = (width/2.0)/shapeC; |
|
|
backup = fracHeight*shapeB + shapeA*(1.0 - fracHeight)/2.0; |
|
|
if (linePtr->arrow != ARROWS_LAST) { |
|
|
poly = linePtr->firstArrowPtr; |
|
|
if (poly == NULL) { |
|
|
poly = (double *) ckalloc((unsigned) |
|
|
(2*PTS_IN_ARROW*sizeof(double))); |
|
|
poly[0] = poly[10] = linePtr->coordPtr[0]; |
|
|
poly[1] = poly[11] = linePtr->coordPtr[1]; |
|
|
linePtr->firstArrowPtr = poly; |
|
|
} |
|
|
dx = poly[0] - linePtr->coordPtr[2]; |
|
|
dy = poly[1] - linePtr->coordPtr[3]; |
|
|
length = hypot(dx, dy); |
|
|
if (length == 0) { |
|
|
sinTheta = cosTheta = 0.0; |
|
|
} else { |
|
|
sinTheta = dy/length; |
|
|
cosTheta = dx/length; |
|
|
} |
|
|
vertX = poly[0] - shapeA*cosTheta; |
|
|
vertY = poly[1] - shapeA*sinTheta; |
|
|
temp = shapeC*sinTheta; |
|
|
poly[2] = poly[0] - shapeB*cosTheta + temp; |
|
|
poly[8] = poly[2] - 2*temp; |
|
|
temp = shapeC*cosTheta; |
|
|
poly[3] = poly[1] - shapeB*sinTheta - temp; |
|
|
poly[9] = poly[3] + 2*temp; |
|
|
poly[4] = poly[2]*fracHeight + vertX*(1.0-fracHeight); |
|
|
poly[5] = poly[3]*fracHeight + vertY*(1.0-fracHeight); |
|
|
poly[6] = poly[8]*fracHeight + vertX*(1.0-fracHeight); |
|
|
poly[7] = poly[9]*fracHeight + vertY*(1.0-fracHeight); |
|
|
|
|
|
/* |
|
|
* Polygon done. Now move the first point towards the second so |
|
|
* that the corners at the end of the line are inside the |
|
|
* arrowhead. |
|
|
*/ |
|
|
|
|
|
linePtr->coordPtr[0] = poly[0] - backup*cosTheta; |
|
|
linePtr->coordPtr[1] = poly[1] - backup*sinTheta; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Similar arrowhead calculation for the last point of the line. |
|
|
*/ |
|
|
|
|
|
if (linePtr->arrow != ARROWS_FIRST) { |
|
|
coordPtr = linePtr->coordPtr + 2*(linePtr->numPoints-2); |
|
|
poly = linePtr->lastArrowPtr; |
|
|
if (poly == NULL) { |
|
|
poly = (double *) ckalloc((unsigned) |
|
|
(2*PTS_IN_ARROW*sizeof(double))); |
|
|
poly[0] = poly[10] = coordPtr[2]; |
|
|
poly[1] = poly[11] = coordPtr[3]; |
|
|
linePtr->lastArrowPtr = poly; |
|
|
} |
|
|
dx = poly[0] - coordPtr[0]; |
|
|
dy = poly[1] - coordPtr[1]; |
|
|
length = hypot(dx, dy); |
|
|
if (length == 0) { |
|
|
sinTheta = cosTheta = 0.0; |
|
|
} else { |
|
|
sinTheta = dy/length; |
|
|
cosTheta = dx/length; |
|
|
} |
|
|
vertX = poly[0] - shapeA*cosTheta; |
|
|
vertY = poly[1] - shapeA*sinTheta; |
|
|
temp = shapeC*sinTheta; |
|
|
poly[2] = poly[0] - shapeB*cosTheta + temp; |
|
|
poly[8] = poly[2] - 2*temp; |
|
|
temp = shapeC*cosTheta; |
|
|
poly[3] = poly[1] - shapeB*sinTheta - temp; |
|
|
poly[9] = poly[3] + 2*temp; |
|
|
poly[4] = poly[2]*fracHeight + vertX*(1.0-fracHeight); |
|
|
poly[5] = poly[3]*fracHeight + vertY*(1.0-fracHeight); |
|
|
poly[6] = poly[8]*fracHeight + vertX*(1.0-fracHeight); |
|
|
poly[7] = poly[9]*fracHeight + vertY*(1.0-fracHeight); |
|
|
coordPtr[2] = poly[0] - backup*cosTheta; |
|
|
coordPtr[3] = poly[1] - backup*sinTheta; |
|
|
} |
|
|
|
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* LineToPostscript -- |
|
|
* |
|
|
* This procedure is called to generate Postscript for |
|
|
* line items. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a standard Tcl result. If an error |
|
|
* occurs in generating Postscript then an error message is |
|
|
* left in the interp's result, replacing whatever used |
|
|
* to be there. If no error occurs, then Postscript for the |
|
|
* item is appended to the result. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
LineToPostscript(interp, canvas, itemPtr, prepass) |
|
|
Tcl_Interp *interp; /* Leave Postscript or error message |
|
|
* here. */ |
|
|
Tk_Canvas canvas; /* Information about overall canvas. */ |
|
|
Tk_Item *itemPtr; /* Item for which Postscript is |
|
|
* wanted. */ |
|
|
int prepass; /* 1 means this is a prepass to |
|
|
* collect font information; 0 means |
|
|
* final Postscript is being created. */ |
|
|
{ |
|
|
LineItem *linePtr = (LineItem *) itemPtr; |
|
|
char buffer[64 + TCL_INTEGER_SPACE]; |
|
|
char *style; |
|
|
|
|
|
double width; |
|
|
XColor *color; |
|
|
Pixmap stipple; |
|
|
Tk_State state = itemPtr->state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
width = linePtr->outline.width; |
|
|
color = linePtr->outline.color; |
|
|
stipple = linePtr->outline.stipple; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
|
|
if (linePtr->outline.activeWidth>width) { |
|
|
width = linePtr->outline.activeWidth; |
|
|
} |
|
|
if (linePtr->outline.activeColor!=NULL) { |
|
|
color = linePtr->outline.activeColor; |
|
|
} |
|
|
if (linePtr->outline.activeStipple!=None) { |
|
|
stipple = linePtr->outline.activeStipple; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (linePtr->outline.disabledWidth>0) { |
|
|
width = linePtr->outline.disabledWidth; |
|
|
} |
|
|
if (linePtr->outline.disabledColor!=NULL) { |
|
|
color = linePtr->outline.disabledColor; |
|
|
} |
|
|
if (linePtr->outline.disabledStipple!=None) { |
|
|
stipple = linePtr->outline.disabledStipple; |
|
|
} |
|
|
} |
|
|
|
|
|
if (color == NULL || linePtr->numPoints<1 || linePtr->coordPtr==NULL) { |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
if (linePtr->numPoints==1) { |
|
|
sprintf(buffer, "%.15g %.15g translate %.15g %.15g", |
|
|
linePtr->coordPtr[0], Tk_CanvasPsY(canvas, linePtr->coordPtr[1]), |
|
|
width/2.0, width/2.0); |
|
|
Tcl_AppendResult(interp, "matrix currentmatrix\n",buffer, |
|
|
" scale 1 0 moveto 0 0 1 0 360 arc\nsetmatrix\n", (char *) NULL); |
|
|
if (Tk_CanvasPsColor(interp, canvas, color) |
|
|
!= TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (stipple != None) { |
|
|
Tcl_AppendResult(interp, "clip ", (char *) NULL); |
|
|
if (Tk_CanvasPsStipple(interp, canvas, stipple) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else { |
|
|
Tcl_AppendResult(interp, "fill\n", (char *) NULL); |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
/* |
|
|
* Generate a path for the line's center-line (do this differently |
|
|
* for straight lines and smoothed lines). |
|
|
*/ |
|
|
|
|
|
if ((!linePtr->smooth) || (linePtr->numPoints < 3)) { |
|
|
Tk_CanvasPsPath(interp, canvas, linePtr->coordPtr, linePtr->numPoints); |
|
|
} else { |
|
|
if ((stipple == None) && linePtr->smooth->postscriptProc) { |
|
|
linePtr->smooth->postscriptProc(interp, canvas, |
|
|
linePtr->coordPtr, linePtr->numPoints, linePtr->splineSteps); |
|
|
} else { |
|
|
/* |
|
|
* Special hack: Postscript printers don't appear to be able |
|
|
* to turn a path drawn with "curveto"s into a clipping path |
|
|
* without exceeding resource limits, so TkMakeBezierPostscript |
|
|
* won't work for stippled curves. Instead, generate all of |
|
|
* the intermediate points here and output them into the |
|
|
* Postscript file with "lineto"s instead. |
|
|
*/ |
|
|
|
|
|
double staticPoints[2*MAX_STATIC_POINTS]; |
|
|
double *pointPtr; |
|
|
int numPoints; |
|
|
|
|
|
numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, |
|
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
|
|
(double *) NULL); |
|
|
pointPtr = staticPoints; |
|
|
if (numPoints > MAX_STATIC_POINTS) { |
|
|
pointPtr = (double *) ckalloc((unsigned) |
|
|
(numPoints * 2 * sizeof(double))); |
|
|
} |
|
|
numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, |
|
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
|
|
pointPtr); |
|
|
Tk_CanvasPsPath(interp, canvas, pointPtr, numPoints); |
|
|
if (pointPtr != staticPoints) { |
|
|
ckfree((char *) pointPtr); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* Set other line-drawing parameters and stroke out the line. |
|
|
*/ |
|
|
|
|
|
style = "0 setlinecap\n"; |
|
|
if (linePtr->capStyle == CapRound) { |
|
|
style = "1 setlinecap\n"; |
|
|
} else if (linePtr->capStyle == CapProjecting) { |
|
|
style = "2 setlinecap\n"; |
|
|
} |
|
|
Tcl_AppendResult(interp, style, (char *) NULL); |
|
|
style = "0 setlinejoin\n"; |
|
|
if (linePtr->joinStyle == JoinRound) { |
|
|
style = "1 setlinejoin\n"; |
|
|
} else if (linePtr->joinStyle == JoinBevel) { |
|
|
style = "2 setlinejoin\n"; |
|
|
} |
|
|
Tcl_AppendResult(interp, style, (char *) NULL); |
|
|
|
|
|
if (Tk_CanvasPsOutline(canvas, itemPtr, |
|
|
&(linePtr->outline)) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Output polygons for the arrowheads, if there are any. |
|
|
*/ |
|
|
|
|
|
if (linePtr->firstArrowPtr != NULL) { |
|
|
if (stipple != None) { |
|
|
Tcl_AppendResult(interp, "grestore gsave\n", |
|
|
(char *) NULL); |
|
|
} |
|
|
if (ArrowheadPostscript(interp, canvas, linePtr, |
|
|
linePtr->firstArrowPtr) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
if (linePtr->lastArrowPtr != NULL) { |
|
|
if (stipple != None) { |
|
|
Tcl_AppendResult(interp, "grestore gsave\n", (char *) NULL); |
|
|
} |
|
|
if (ArrowheadPostscript(interp, canvas, linePtr, |
|
|
linePtr->lastArrowPtr) != TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ArrowheadPostscript -- |
|
|
* |
|
|
* This procedure is called to generate Postscript for |
|
|
* an arrowhead for a line item. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a standard Tcl result. If an error |
|
|
* occurs in generating Postscript then an error message is |
|
|
* left in the interp's result, replacing whatever used |
|
|
* to be there. If no error occurs, then Postscript for the |
|
|
* arrowhead is appended to the result. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
ArrowheadPostscript(interp, canvas, linePtr, arrowPtr) |
|
|
Tcl_Interp *interp; /* Leave Postscript or error message |
|
|
* here. */ |
|
|
Tk_Canvas canvas; /* Information about overall canvas. */ |
|
|
LineItem *linePtr; /* Line item for which Postscript is |
|
|
* being generated. */ |
|
|
double *arrowPtr; /* Pointer to first of five points |
|
|
* describing arrowhead polygon. */ |
|
|
{ |
|
|
Pixmap stipple; |
|
|
Tk_State state = linePtr->header.state; |
|
|
|
|
|
if(state == TK_STATE_NULL) { |
|
|
state = ((TkCanvas *)canvas)->canvas_state; |
|
|
} |
|
|
|
|
|
stipple = linePtr->outline.stipple; |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)linePtr) { |
|
|
if (linePtr->outline.activeStipple!=None) { |
|
|
stipple = linePtr->outline.activeStipple; |
|
|
} |
|
|
} else if (state==TK_STATE_DISABLED) { |
|
|
if (linePtr->outline.activeStipple!=None) { |
|
|
stipple = linePtr->outline.disabledStipple; |
|
|
} |
|
|
} |
|
|
|
|
|
Tk_CanvasPsPath(interp, canvas, arrowPtr, PTS_IN_ARROW); |
|
|
if (stipple != None) { |
|
|
Tcl_AppendResult(interp, "clip ", (char *) NULL); |
|
|
if (Tk_CanvasPsStipple(interp, canvas, stipple) |
|
|
!= TCL_OK) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} else { |
|
|
Tcl_AppendResult(interp, "fill\n", (char *) NULL); |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tkCanvLine.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 2:35a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TKCANVLINE.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
|
| 3 |
|
/* |
| 4 |
|
* tkCanvLine.c -- |
| 5 |
|
* |
| 6 |
|
* This file implements line items for canvas widgets. |
| 7 |
|
* |
| 8 |
|
* Copyright (c) 1991-1994 The Regents of the University of California. |
| 9 |
|
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
| 10 |
|
* Copyright (c) 1998-1999 by Scriptics Corporation. |
| 11 |
|
* |
| 12 |
|
* See the file "license.terms" for information on usage and redistribution |
| 13 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 14 |
|
* |
| 15 |
|
* RCS: @(#) $Id: tkcanvline.c,v 1.1.1.1 2001/06/13 04:56:46 dtashley Exp $ |
| 16 |
|
*/ |
| 17 |
|
|
| 18 |
|
#include <stdio.h> |
| 19 |
|
#include "tkInt.h" |
| 20 |
|
#include "tkPort.h" |
| 21 |
|
#include "tkCanvas.h" |
| 22 |
|
|
| 23 |
|
/* |
| 24 |
|
* The structure below defines the record for each line item. |
| 25 |
|
*/ |
| 26 |
|
|
| 27 |
|
typedef enum { |
| 28 |
|
ARROWS_NONE, ARROWS_FIRST, ARROWS_LAST, ARROWS_BOTH |
| 29 |
|
} Arrows; |
| 30 |
|
|
| 31 |
|
typedef struct LineItem { |
| 32 |
|
Tk_Item header; /* Generic stuff that's the same for all |
| 33 |
|
* types. MUST BE FIRST IN STRUCTURE. */ |
| 34 |
|
Tk_Outline outline; /* Outline structure */ |
| 35 |
|
Tk_Canvas canvas; /* Canvas containing item. Needed for |
| 36 |
|
* parsing arrow shapes. */ |
| 37 |
|
int numPoints; /* Number of points in line (always >= 0). */ |
| 38 |
|
double *coordPtr; /* Pointer to malloc-ed array containing |
| 39 |
|
* x- and y-coords of all points in line. |
| 40 |
|
* X-coords are even-valued indices, y-coords |
| 41 |
|
* are corresponding odd-valued indices. If |
| 42 |
|
* the line has arrowheads then the first |
| 43 |
|
* and last points have been adjusted to refer |
| 44 |
|
* to the necks of the arrowheads rather than |
| 45 |
|
* their tips. The actual endpoints are |
| 46 |
|
* stored in the *firstArrowPtr and |
| 47 |
|
* *lastArrowPtr, if they exist. */ |
| 48 |
|
int capStyle; /* Cap style for line. */ |
| 49 |
|
int joinStyle; /* Join style for line. */ |
| 50 |
|
GC arrowGC; /* Graphics context for drawing arrowheads. */ |
| 51 |
|
Arrows arrow; /* Indicates whether or not to draw arrowheads: |
| 52 |
|
* "none", "first", "last", or "both". */ |
| 53 |
|
float arrowShapeA; /* Distance from tip of arrowhead to center. */ |
| 54 |
|
float arrowShapeB; /* Distance from tip of arrowhead to trailing |
| 55 |
|
* point, measured along shaft. */ |
| 56 |
|
float arrowShapeC; /* Distance of trailing points from outside |
| 57 |
|
* edge of shaft. */ |
| 58 |
|
double *firstArrowPtr; /* Points to array of PTS_IN_ARROW points |
| 59 |
|
* describing polygon for arrowhead at first |
| 60 |
|
* point in line. First point of arrowhead |
| 61 |
|
* is tip. Malloc'ed. NULL means no arrowhead |
| 62 |
|
* at first point. */ |
| 63 |
|
double *lastArrowPtr; /* Points to polygon for arrowhead at last |
| 64 |
|
* point in line (PTS_IN_ARROW points, first |
| 65 |
|
* of which is tip). Malloc'ed. NULL means |
| 66 |
|
* no arrowhead at last point. */ |
| 67 |
|
Tk_SmoothMethod *smooth; /* Non-zero means draw line smoothed (i.e. |
| 68 |
|
* with Bezier splines). */ |
| 69 |
|
int splineSteps; /* Number of steps in each spline segment. */ |
| 70 |
|
} LineItem; |
| 71 |
|
|
| 72 |
|
/* |
| 73 |
|
* Number of points in an arrowHead: |
| 74 |
|
*/ |
| 75 |
|
|
| 76 |
|
#define PTS_IN_ARROW 6 |
| 77 |
|
|
| 78 |
|
/* |
| 79 |
|
* Prototypes for procedures defined in this file: |
| 80 |
|
*/ |
| 81 |
|
|
| 82 |
|
static int ArrowheadPostscript _ANSI_ARGS_((Tcl_Interp *interp, |
| 83 |
|
Tk_Canvas canvas, LineItem *linePtr, |
| 84 |
|
double *arrowPtr)); |
| 85 |
|
static void ComputeLineBbox _ANSI_ARGS_((Tk_Canvas canvas, |
| 86 |
|
LineItem *linePtr)); |
| 87 |
|
static int ConfigureLine _ANSI_ARGS_((Tcl_Interp *interp, |
| 88 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, int argc, |
| 89 |
|
Tcl_Obj *CONST argv[], int flags)); |
| 90 |
|
static int ConfigureArrows _ANSI_ARGS_((Tk_Canvas canvas, |
| 91 |
|
LineItem *linePtr)); |
| 92 |
|
static int CreateLine _ANSI_ARGS_((Tcl_Interp *interp, |
| 93 |
|
Tk_Canvas canvas, struct Tk_Item *itemPtr, |
| 94 |
|
int argc, Tcl_Obj *CONST argv[])); |
| 95 |
|
static void DeleteLine _ANSI_ARGS_((Tk_Canvas canvas, |
| 96 |
|
Tk_Item *itemPtr, Display *display)); |
| 97 |
|
static void DisplayLine _ANSI_ARGS_((Tk_Canvas canvas, |
| 98 |
|
Tk_Item *itemPtr, Display *display, Drawable dst, |
| 99 |
|
int x, int y, int width, int height)); |
| 100 |
|
static int GetLineIndex _ANSI_ARGS_((Tcl_Interp *interp, |
| 101 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, |
| 102 |
|
Tcl_Obj *obj, int *indexPtr)); |
| 103 |
|
static int LineCoords _ANSI_ARGS_((Tcl_Interp *interp, |
| 104 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, |
| 105 |
|
int argc, Tcl_Obj *CONST argv[])); |
| 106 |
|
static void LineDeleteCoords _ANSI_ARGS_((Tk_Canvas canvas, |
| 107 |
|
Tk_Item *itemPtr, int first, int last)); |
| 108 |
|
static void LineInsert _ANSI_ARGS_((Tk_Canvas canvas, |
| 109 |
|
Tk_Item *itemPtr, int beforeThis, Tcl_Obj *obj)); |
| 110 |
|
static int LineToArea _ANSI_ARGS_((Tk_Canvas canvas, |
| 111 |
|
Tk_Item *itemPtr, double *rectPtr)); |
| 112 |
|
static double LineToPoint _ANSI_ARGS_((Tk_Canvas canvas, |
| 113 |
|
Tk_Item *itemPtr, double *coordPtr)); |
| 114 |
|
static int LineToPostscript _ANSI_ARGS_((Tcl_Interp *interp, |
| 115 |
|
Tk_Canvas canvas, Tk_Item *itemPtr, int prepass)); |
| 116 |
|
static int ArrowParseProc _ANSI_ARGS_((ClientData clientData, |
| 117 |
|
Tcl_Interp *interp, Tk_Window tkwin, |
| 118 |
|
CONST char *value, char *recordPtr, int offset)); |
| 119 |
|
static char * ArrowPrintProc _ANSI_ARGS_((ClientData clientData, |
| 120 |
|
Tk_Window tkwin, char *recordPtr, int offset, |
| 121 |
|
Tcl_FreeProc **freeProcPtr)); |
| 122 |
|
static int ParseArrowShape _ANSI_ARGS_((ClientData clientData, |
| 123 |
|
Tcl_Interp *interp, Tk_Window tkwin, |
| 124 |
|
CONST char *value, char *recordPtr, int offset)); |
| 125 |
|
static char * PrintArrowShape _ANSI_ARGS_((ClientData clientData, |
| 126 |
|
Tk_Window tkwin, char *recordPtr, int offset, |
| 127 |
|
Tcl_FreeProc **freeProcPtr)); |
| 128 |
|
static void ScaleLine _ANSI_ARGS_((Tk_Canvas canvas, |
| 129 |
|
Tk_Item *itemPtr, double originX, double originY, |
| 130 |
|
double scaleX, double scaleY)); |
| 131 |
|
static void TranslateLine _ANSI_ARGS_((Tk_Canvas canvas, |
| 132 |
|
Tk_Item *itemPtr, double deltaX, double deltaY)); |
| 133 |
|
|
| 134 |
|
/* |
| 135 |
|
* Information used for parsing configuration specs. If you change any |
| 136 |
|
* of the default strings, be sure to change the corresponding default |
| 137 |
|
* values in CreateLine. |
| 138 |
|
*/ |
| 139 |
|
|
| 140 |
|
static Tk_CustomOption arrowShapeOption = { |
| 141 |
|
(Tk_OptionParseProc *) ParseArrowShape, |
| 142 |
|
PrintArrowShape, (ClientData) NULL |
| 143 |
|
}; |
| 144 |
|
static Tk_CustomOption arrowOption = { |
| 145 |
|
(Tk_OptionParseProc *) ArrowParseProc, |
| 146 |
|
ArrowPrintProc, (ClientData) NULL |
| 147 |
|
}; |
| 148 |
|
static Tk_CustomOption smoothOption = { |
| 149 |
|
(Tk_OptionParseProc *) TkSmoothParseProc, |
| 150 |
|
TkSmoothPrintProc, (ClientData) NULL |
| 151 |
|
}; |
| 152 |
|
static Tk_CustomOption stateOption = { |
| 153 |
|
(Tk_OptionParseProc *) TkStateParseProc, |
| 154 |
|
TkStatePrintProc, (ClientData) 2 |
| 155 |
|
}; |
| 156 |
|
static Tk_CustomOption tagsOption = { |
| 157 |
|
(Tk_OptionParseProc *) Tk_CanvasTagsParseProc, |
| 158 |
|
Tk_CanvasTagsPrintProc, (ClientData) NULL |
| 159 |
|
}; |
| 160 |
|
static Tk_CustomOption dashOption = { |
| 161 |
|
(Tk_OptionParseProc *) TkCanvasDashParseProc, |
| 162 |
|
TkCanvasDashPrintProc, (ClientData) NULL |
| 163 |
|
}; |
| 164 |
|
static Tk_CustomOption offsetOption = { |
| 165 |
|
(Tk_OptionParseProc *) TkOffsetParseProc, |
| 166 |
|
TkOffsetPrintProc, |
| 167 |
|
(ClientData) (TK_OFFSET_RELATIVE|TK_OFFSET_INDEX) |
| 168 |
|
}; |
| 169 |
|
static Tk_CustomOption pixelOption = { |
| 170 |
|
(Tk_OptionParseProc *) TkPixelParseProc, |
| 171 |
|
TkPixelPrintProc, (ClientData) NULL |
| 172 |
|
}; |
| 173 |
|
|
| 174 |
|
static Tk_ConfigSpec configSpecs[] = { |
| 175 |
|
{TK_CONFIG_CUSTOM, "-activedash", (char *) NULL, (char *) NULL, |
| 176 |
|
(char *) NULL, Tk_Offset(LineItem, outline.activeDash), |
| 177 |
|
TK_CONFIG_NULL_OK, &dashOption}, |
| 178 |
|
{TK_CONFIG_COLOR, "-activefill", (char *) NULL, (char *) NULL, |
| 179 |
|
(char *) NULL, Tk_Offset(LineItem, outline.activeColor), |
| 180 |
|
TK_CONFIG_NULL_OK}, |
| 181 |
|
{TK_CONFIG_BITMAP, "-activestipple", (char *) NULL, (char *) NULL, |
| 182 |
|
(char *) NULL, Tk_Offset(LineItem, outline.activeStipple), |
| 183 |
|
TK_CONFIG_NULL_OK}, |
| 184 |
|
{TK_CONFIG_CUSTOM, "-activewidth", (char *) NULL, (char *) NULL, |
| 185 |
|
"0.0", Tk_Offset(LineItem, outline.activeWidth), |
| 186 |
|
TK_CONFIG_DONT_SET_DEFAULT, &pixelOption}, |
| 187 |
|
{TK_CONFIG_CUSTOM, "-arrow", (char *) NULL, (char *) NULL, |
| 188 |
|
"none", Tk_Offset(LineItem, arrow), TK_CONFIG_DONT_SET_DEFAULT, &arrowOption}, |
| 189 |
|
{TK_CONFIG_CUSTOM, "-arrowshape", (char *) NULL, (char *) NULL, |
| 190 |
|
"8 10 3", Tk_Offset(LineItem, arrowShapeA), |
| 191 |
|
TK_CONFIG_DONT_SET_DEFAULT, &arrowShapeOption}, |
| 192 |
|
{TK_CONFIG_CAP_STYLE, "-capstyle", (char *) NULL, (char *) NULL, |
| 193 |
|
"butt", Tk_Offset(LineItem, capStyle), TK_CONFIG_DONT_SET_DEFAULT}, |
| 194 |
|
{TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL, |
| 195 |
|
"black", Tk_Offset(LineItem, outline.color), TK_CONFIG_NULL_OK}, |
| 196 |
|
{TK_CONFIG_CUSTOM, "-dash", (char *) NULL, (char *) NULL, |
| 197 |
|
(char *) NULL, Tk_Offset(LineItem, outline.dash), |
| 198 |
|
TK_CONFIG_NULL_OK, &dashOption}, |
| 199 |
|
{TK_CONFIG_PIXELS, "-dashoffset", (char *) NULL, (char *) NULL, |
| 200 |
|
"0", Tk_Offset(LineItem, outline.offset), |
| 201 |
|
TK_CONFIG_DONT_SET_DEFAULT}, |
| 202 |
|
{TK_CONFIG_CUSTOM, "-disableddash", (char *) NULL, (char *) NULL, |
| 203 |
|
(char *) NULL, Tk_Offset(LineItem, outline.disabledDash), |
| 204 |
|
TK_CONFIG_NULL_OK, &dashOption}, |
| 205 |
|
{TK_CONFIG_COLOR, "-disabledfill", (char *) NULL, (char *) NULL, |
| 206 |
|
(char *) NULL, Tk_Offset(LineItem, outline.disabledColor), |
| 207 |
|
TK_CONFIG_NULL_OK}, |
| 208 |
|
{TK_CONFIG_BITMAP, "-disabledstipple", (char *) NULL, (char *) NULL, |
| 209 |
|
(char *) NULL, Tk_Offset(LineItem, outline.disabledStipple), |
| 210 |
|
TK_CONFIG_NULL_OK}, |
| 211 |
|
{TK_CONFIG_CUSTOM, "-disabledwidth", (char *) NULL, (char *) NULL, |
| 212 |
|
"0.0", Tk_Offset(LineItem, outline.disabledWidth), |
| 213 |
|
TK_CONFIG_DONT_SET_DEFAULT, &pixelOption}, |
| 214 |
|
{TK_CONFIG_JOIN_STYLE, "-joinstyle", (char *) NULL, (char *) NULL, |
| 215 |
|
"round", Tk_Offset(LineItem, joinStyle), TK_CONFIG_DONT_SET_DEFAULT}, |
| 216 |
|
{TK_CONFIG_CUSTOM, "-offset", (char *) NULL, (char *) NULL, |
| 217 |
|
"0,0", Tk_Offset(LineItem, outline.tsoffset), |
| 218 |
|
TK_CONFIG_DONT_SET_DEFAULT, &offsetOption}, |
| 219 |
|
{TK_CONFIG_CUSTOM, "-smooth", (char *) NULL, (char *) NULL, |
| 220 |
|
"0", Tk_Offset(LineItem, smooth), |
| 221 |
|
TK_CONFIG_DONT_SET_DEFAULT, &smoothOption}, |
| 222 |
|
{TK_CONFIG_INT, "-splinesteps", (char *) NULL, (char *) NULL, |
| 223 |
|
"12", Tk_Offset(LineItem, splineSteps), TK_CONFIG_DONT_SET_DEFAULT}, |
| 224 |
|
{TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL, |
| 225 |
|
(char *) NULL, Tk_Offset(Tk_Item, state), TK_CONFIG_NULL_OK, |
| 226 |
|
&stateOption}, |
| 227 |
|
{TK_CONFIG_BITMAP, "-stipple", (char *) NULL, (char *) NULL, |
| 228 |
|
(char *) NULL, Tk_Offset(LineItem, outline.stipple), |
| 229 |
|
TK_CONFIG_NULL_OK}, |
| 230 |
|
{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL, |
| 231 |
|
(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption}, |
| 232 |
|
{TK_CONFIG_CUSTOM, "-width", (char *) NULL, (char *) NULL, |
| 233 |
|
"1.0", Tk_Offset(LineItem, outline.width), |
| 234 |
|
TK_CONFIG_DONT_SET_DEFAULT, &pixelOption}, |
| 235 |
|
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL, |
| 236 |
|
(char *) NULL, 0, 0} |
| 237 |
|
}; |
| 238 |
|
|
| 239 |
|
/* |
| 240 |
|
* The structures below defines the line item type by means |
| 241 |
|
* of procedures that can be invoked by generic item code. |
| 242 |
|
*/ |
| 243 |
|
|
| 244 |
|
Tk_ItemType tkLineType = { |
| 245 |
|
"line", /* name */ |
| 246 |
|
sizeof(LineItem), /* itemSize */ |
| 247 |
|
CreateLine, /* createProc */ |
| 248 |
|
configSpecs, /* configSpecs */ |
| 249 |
|
ConfigureLine, /* configureProc */ |
| 250 |
|
LineCoords, /* coordProc */ |
| 251 |
|
DeleteLine, /* deleteProc */ |
| 252 |
|
DisplayLine, /* displayProc */ |
| 253 |
|
TK_CONFIG_OBJS, /* flags */ |
| 254 |
|
LineToPoint, /* pointProc */ |
| 255 |
|
LineToArea, /* areaProc */ |
| 256 |
|
LineToPostscript, /* postscriptProc */ |
| 257 |
|
ScaleLine, /* scaleProc */ |
| 258 |
|
TranslateLine, /* translateProc */ |
| 259 |
|
(Tk_ItemIndexProc *) GetLineIndex, /* indexProc */ |
| 260 |
|
(Tk_ItemCursorProc *) NULL, /* icursorProc */ |
| 261 |
|
(Tk_ItemSelectionProc *) NULL, /* selectionProc */ |
| 262 |
|
(Tk_ItemInsertProc *) LineInsert, /* insertProc */ |
| 263 |
|
LineDeleteCoords, /* dTextProc */ |
| 264 |
|
(Tk_ItemType *) NULL, /* nextPtr */ |
| 265 |
|
}; |
| 266 |
|
|
| 267 |
|
/* |
| 268 |
|
* The definition below determines how large are static arrays |
| 269 |
|
* used to hold spline points (splines larger than this have to |
| 270 |
|
* have their arrays malloc-ed). |
| 271 |
|
*/ |
| 272 |
|
|
| 273 |
|
#define MAX_STATIC_POINTS 200 |
| 274 |
|
|
| 275 |
|
/* |
| 276 |
|
*-------------------------------------------------------------- |
| 277 |
|
* |
| 278 |
|
* CreateLine -- |
| 279 |
|
* |
| 280 |
|
* This procedure is invoked to create a new line item in |
| 281 |
|
* a canvas. |
| 282 |
|
* |
| 283 |
|
* Results: |
| 284 |
|
* A standard Tcl return value. If an error occurred in |
| 285 |
|
* creating the item, then an error message is left in |
| 286 |
|
* the interp's result; in this case itemPtr is left uninitialized, |
| 287 |
|
* so it can be safely freed by the caller. |
| 288 |
|
* |
| 289 |
|
* Side effects: |
| 290 |
|
* A new line item is created. |
| 291 |
|
* |
| 292 |
|
*-------------------------------------------------------------- |
| 293 |
|
*/ |
| 294 |
|
|
| 295 |
|
static int |
| 296 |
|
CreateLine(interp, canvas, itemPtr, argc, argv) |
| 297 |
|
Tcl_Interp *interp; /* Interpreter for error reporting. */ |
| 298 |
|
Tk_Canvas canvas; /* Canvas to hold new item. */ |
| 299 |
|
Tk_Item *itemPtr; /* Record to hold new item; header |
| 300 |
|
* has been initialized by caller. */ |
| 301 |
|
int argc; /* Number of arguments in argv. */ |
| 302 |
|
Tcl_Obj *CONST argv[]; /* Arguments describing line. */ |
| 303 |
|
{ |
| 304 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 305 |
|
int i; |
| 306 |
|
|
| 307 |
|
/* |
| 308 |
|
* Carry out initialization that is needed to set defaults and to |
| 309 |
|
* allow proper cleanup after errors during the the remainder of |
| 310 |
|
* this procedure. |
| 311 |
|
*/ |
| 312 |
|
|
| 313 |
|
Tk_CreateOutline(&(linePtr->outline)); |
| 314 |
|
linePtr->canvas = canvas; |
| 315 |
|
linePtr->numPoints = 0; |
| 316 |
|
linePtr->coordPtr = NULL; |
| 317 |
|
linePtr->capStyle = CapButt; |
| 318 |
|
linePtr->joinStyle = JoinRound; |
| 319 |
|
linePtr->arrowGC = None; |
| 320 |
|
linePtr->arrow = ARROWS_NONE; |
| 321 |
|
linePtr->arrowShapeA = (float)8.0; |
| 322 |
|
linePtr->arrowShapeB = (float)10.0; |
| 323 |
|
linePtr->arrowShapeC = (float)3.0; |
| 324 |
|
linePtr->firstArrowPtr = NULL; |
| 325 |
|
linePtr->lastArrowPtr = NULL; |
| 326 |
|
linePtr->smooth = (Tk_SmoothMethod *) NULL; |
| 327 |
|
linePtr->splineSteps = 12; |
| 328 |
|
|
| 329 |
|
/* |
| 330 |
|
* Count the number of points and then parse them into a point |
| 331 |
|
* array. Leading arguments are assumed to be points if they |
| 332 |
|
* start with a digit or a minus sign followed by a digit. |
| 333 |
|
*/ |
| 334 |
|
|
| 335 |
|
for (i = 0; i < argc; i++) { |
| 336 |
|
char *arg = Tcl_GetStringFromObj(argv[i], NULL); |
| 337 |
|
if ((arg[0] == '-') && (arg[1] >= 'a') |
| 338 |
|
&& (arg[1] <= 'z')) { |
| 339 |
|
break; |
| 340 |
|
} |
| 341 |
|
} |
| 342 |
|
if (i && (LineCoords(interp, canvas, itemPtr, i, argv) != TCL_OK)) { |
| 343 |
|
goto error; |
| 344 |
|
} |
| 345 |
|
if (ConfigureLine(interp, canvas, itemPtr, argc-i, argv+i, 0) == TCL_OK) { |
| 346 |
|
return TCL_OK; |
| 347 |
|
} |
| 348 |
|
|
| 349 |
|
error: |
| 350 |
|
DeleteLine(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas))); |
| 351 |
|
return TCL_ERROR; |
| 352 |
|
} |
| 353 |
|
|
| 354 |
|
/* |
| 355 |
|
*-------------------------------------------------------------- |
| 356 |
|
* |
| 357 |
|
* LineCoords -- |
| 358 |
|
* |
| 359 |
|
* This procedure is invoked to process the "coords" widget |
| 360 |
|
* command on lines. See the user documentation for details |
| 361 |
|
* on what it does. |
| 362 |
|
* |
| 363 |
|
* Results: |
| 364 |
|
* Returns TCL_OK or TCL_ERROR, and sets the interp's result. |
| 365 |
|
* |
| 366 |
|
* Side effects: |
| 367 |
|
* The coordinates for the given item may be changed. |
| 368 |
|
* |
| 369 |
|
*-------------------------------------------------------------- |
| 370 |
|
*/ |
| 371 |
|
|
| 372 |
|
static int |
| 373 |
|
LineCoords(interp, canvas, itemPtr, argc, argv) |
| 374 |
|
Tcl_Interp *interp; /* Used for error reporting. */ |
| 375 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
| 376 |
|
Tk_Item *itemPtr; /* Item whose coordinates are to be |
| 377 |
|
* read or modified. */ |
| 378 |
|
int argc; /* Number of coordinates supplied in |
| 379 |
|
* argv. */ |
| 380 |
|
Tcl_Obj *CONST argv[]; /* Array of coordinates: x1, y1, |
| 381 |
|
* x2, y2, ... */ |
| 382 |
|
{ |
| 383 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 384 |
|
int i, numPoints; |
| 385 |
|
double *coordPtr; |
| 386 |
|
|
| 387 |
|
if (argc == 0) { |
| 388 |
|
int numCoords; |
| 389 |
|
Tcl_Obj *subobj, *obj = Tcl_NewObj(); |
| 390 |
|
|
| 391 |
|
numCoords = 2*linePtr->numPoints; |
| 392 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 393 |
|
coordPtr = linePtr->firstArrowPtr; |
| 394 |
|
} else { |
| 395 |
|
coordPtr = linePtr->coordPtr; |
| 396 |
|
} |
| 397 |
|
for (i = 0; i < numCoords; i++, coordPtr++) { |
| 398 |
|
if (i == 2) { |
| 399 |
|
coordPtr = linePtr->coordPtr+2; |
| 400 |
|
} |
| 401 |
|
if ((linePtr->lastArrowPtr != NULL) && (i == (numCoords-2))) { |
| 402 |
|
coordPtr = linePtr->lastArrowPtr; |
| 403 |
|
} |
| 404 |
|
subobj = Tcl_NewDoubleObj(*coordPtr); |
| 405 |
|
Tcl_ListObjAppendElement(interp, obj, subobj); |
| 406 |
|
} |
| 407 |
|
Tcl_SetObjResult(interp, obj); |
| 408 |
|
return TCL_OK; |
| 409 |
|
} |
| 410 |
|
if (argc == 1) { |
| 411 |
|
if (Tcl_ListObjGetElements(interp, argv[0], &argc, |
| 412 |
|
(Tcl_Obj ***) &argv) != TCL_OK) { |
| 413 |
|
return TCL_ERROR; |
| 414 |
|
} |
| 415 |
|
} |
| 416 |
|
if (argc & 1) { |
| 417 |
|
Tcl_AppendResult(interp, |
| 418 |
|
"odd number of coordinates specified for line", |
| 419 |
|
(char *) NULL); |
| 420 |
|
return TCL_ERROR; |
| 421 |
|
} else if (argc < 4) { |
| 422 |
|
Tcl_AppendResult(interp, |
| 423 |
|
"too few coordinates specified for line", |
| 424 |
|
(char *) NULL); |
| 425 |
|
return TCL_ERROR; |
| 426 |
|
} else { |
| 427 |
|
numPoints = argc/2; |
| 428 |
|
if (linePtr->numPoints != numPoints) { |
| 429 |
|
coordPtr = (double *) ckalloc((unsigned) |
| 430 |
|
(sizeof(double) * argc)); |
| 431 |
|
if (linePtr->coordPtr != NULL) { |
| 432 |
|
ckfree((char *) linePtr->coordPtr); |
| 433 |
|
} |
| 434 |
|
linePtr->coordPtr = coordPtr; |
| 435 |
|
linePtr->numPoints = numPoints; |
| 436 |
|
} |
| 437 |
|
coordPtr = linePtr->coordPtr; |
| 438 |
|
for (i = 0; i <argc; i++) { |
| 439 |
|
if (Tk_CanvasGetCoordFromObj(interp, canvas, argv[i], |
| 440 |
|
coordPtr++) != TCL_OK) { |
| 441 |
|
return TCL_ERROR; |
| 442 |
|
} |
| 443 |
|
} |
| 444 |
|
|
| 445 |
|
/* |
| 446 |
|
* Update arrowheads by throwing away any existing arrow-head |
| 447 |
|
* information and calling ConfigureArrows to recompute it. |
| 448 |
|
*/ |
| 449 |
|
|
| 450 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 451 |
|
ckfree((char *) linePtr->firstArrowPtr); |
| 452 |
|
linePtr->firstArrowPtr = NULL; |
| 453 |
|
} |
| 454 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 455 |
|
ckfree((char *) linePtr->lastArrowPtr); |
| 456 |
|
linePtr->lastArrowPtr = NULL; |
| 457 |
|
} |
| 458 |
|
if (linePtr->arrow != ARROWS_NONE) { |
| 459 |
|
ConfigureArrows(canvas, linePtr); |
| 460 |
|
} |
| 461 |
|
ComputeLineBbox(canvas, linePtr); |
| 462 |
|
} |
| 463 |
|
return TCL_OK; |
| 464 |
|
} |
| 465 |
|
|
| 466 |
|
/* |
| 467 |
|
*-------------------------------------------------------------- |
| 468 |
|
* |
| 469 |
|
* ConfigureLine -- |
| 470 |
|
* |
| 471 |
|
* This procedure is invoked to configure various aspects |
| 472 |
|
* of a line item such as its background color. |
| 473 |
|
* |
| 474 |
|
* Results: |
| 475 |
|
* A standard Tcl result code. If an error occurs, then |
| 476 |
|
* an error message is left in the interp's result. |
| 477 |
|
* |
| 478 |
|
* Side effects: |
| 479 |
|
* Configuration information, such as colors and stipple |
| 480 |
|
* patterns, may be set for itemPtr. |
| 481 |
|
* |
| 482 |
|
*-------------------------------------------------------------- |
| 483 |
|
*/ |
| 484 |
|
|
| 485 |
|
static int |
| 486 |
|
ConfigureLine(interp, canvas, itemPtr, argc, argv, flags) |
| 487 |
|
Tcl_Interp *interp; /* Used for error reporting. */ |
| 488 |
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
| 489 |
|
Tk_Item *itemPtr; /* Line item to reconfigure. */ |
| 490 |
|
int argc; /* Number of elements in argv. */ |
| 491 |
|
Tcl_Obj *CONST argv[]; /* Arguments describing things to configure. */ |
| 492 |
|
int flags; /* Flags to pass to Tk_ConfigureWidget. */ |
| 493 |
|
{ |
| 494 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 495 |
|
XGCValues gcValues; |
| 496 |
|
GC newGC, arrowGC; |
| 497 |
|
unsigned long mask; |
| 498 |
|
Tk_Window tkwin; |
| 499 |
|
Tk_State state; |
| 500 |
|
|
| 501 |
|
tkwin = Tk_CanvasTkwin(canvas); |
| 502 |
|
if (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, (char **) argv, |
| 503 |
|
(char *) linePtr, flags|TK_CONFIG_OBJS) != TCL_OK) { |
| 504 |
|
return TCL_ERROR; |
| 505 |
|
} |
| 506 |
|
|
| 507 |
|
/* |
| 508 |
|
* A few of the options require additional processing, such as |
| 509 |
|
* graphics contexts. |
| 510 |
|
*/ |
| 511 |
|
|
| 512 |
|
state = itemPtr->state; |
| 513 |
|
|
| 514 |
|
if(state == TK_STATE_NULL) { |
| 515 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 516 |
|
} |
| 517 |
|
|
| 518 |
|
if (linePtr->outline.activeWidth > linePtr->outline.width || |
| 519 |
|
linePtr->outline.activeDash.number != 0 || |
| 520 |
|
linePtr->outline.activeColor != NULL || |
| 521 |
|
linePtr->outline.activeStipple != None) { |
| 522 |
|
itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT; |
| 523 |
|
} else { |
| 524 |
|
itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT; |
| 525 |
|
} |
| 526 |
|
mask = Tk_ConfigOutlineGC(&gcValues, canvas, itemPtr, |
| 527 |
|
&(linePtr->outline)); |
| 528 |
|
if (mask) { |
| 529 |
|
if (linePtr->arrow == ARROWS_NONE) { |
| 530 |
|
gcValues.cap_style = linePtr->capStyle; |
| 531 |
|
mask |= GCCapStyle; |
| 532 |
|
} |
| 533 |
|
gcValues.join_style = linePtr->joinStyle; |
| 534 |
|
mask |= GCJoinStyle; |
| 535 |
|
newGC = Tk_GetGC(tkwin, mask, &gcValues); |
| 536 |
|
gcValues.line_width = 0; |
| 537 |
|
arrowGC = Tk_GetGC(tkwin, mask, &gcValues); |
| 538 |
|
} else { |
| 539 |
|
newGC = arrowGC = None; |
| 540 |
|
} |
| 541 |
|
if (linePtr->outline.gc != None) { |
| 542 |
|
Tk_FreeGC(Tk_Display(tkwin), linePtr->outline.gc); |
| 543 |
|
} |
| 544 |
|
if (linePtr->arrowGC != None) { |
| 545 |
|
Tk_FreeGC(Tk_Display(tkwin), linePtr->arrowGC); |
| 546 |
|
} |
| 547 |
|
linePtr->outline.gc = newGC; |
| 548 |
|
linePtr->arrowGC = arrowGC; |
| 549 |
|
|
| 550 |
|
/* |
| 551 |
|
* Keep spline parameters within reasonable limits. |
| 552 |
|
*/ |
| 553 |
|
|
| 554 |
|
if (linePtr->splineSteps < 1) { |
| 555 |
|
linePtr->splineSteps = 1; |
| 556 |
|
} else if (linePtr->splineSteps > 100) { |
| 557 |
|
linePtr->splineSteps = 100; |
| 558 |
|
} |
| 559 |
|
|
| 560 |
|
if ((!linePtr->numPoints) || (state==TK_STATE_HIDDEN)) { |
| 561 |
|
ComputeLineBbox(canvas, linePtr); |
| 562 |
|
return TCL_OK; |
| 563 |
|
} |
| 564 |
|
|
| 565 |
|
/* |
| 566 |
|
* Setup arrowheads, if needed. If arrowheads are turned off, |
| 567 |
|
* restore the line's endpoints (they were shortened when the |
| 568 |
|
* arrowheads were added). |
| 569 |
|
*/ |
| 570 |
|
|
| 571 |
|
if ((linePtr->firstArrowPtr != NULL) && (linePtr->arrow != ARROWS_FIRST) |
| 572 |
|
&& (linePtr->arrow != ARROWS_BOTH)) { |
| 573 |
|
linePtr->coordPtr[0] = linePtr->firstArrowPtr[0]; |
| 574 |
|
linePtr->coordPtr[1] = linePtr->firstArrowPtr[1]; |
| 575 |
|
ckfree((char *) linePtr->firstArrowPtr); |
| 576 |
|
linePtr->firstArrowPtr = NULL; |
| 577 |
|
} |
| 578 |
|
if ((linePtr->lastArrowPtr != NULL) && (linePtr->arrow != ARROWS_LAST) |
| 579 |
|
&& (linePtr->arrow != ARROWS_BOTH)) { |
| 580 |
|
int i; |
| 581 |
|
|
| 582 |
|
i = 2*(linePtr->numPoints-1); |
| 583 |
|
linePtr->coordPtr[i] = linePtr->lastArrowPtr[0]; |
| 584 |
|
linePtr->coordPtr[i+1] = linePtr->lastArrowPtr[1]; |
| 585 |
|
ckfree((char *) linePtr->lastArrowPtr); |
| 586 |
|
linePtr->lastArrowPtr = NULL; |
| 587 |
|
} |
| 588 |
|
if (linePtr->arrow != ARROWS_NONE) { |
| 589 |
|
ConfigureArrows(canvas, linePtr); |
| 590 |
|
} |
| 591 |
|
|
| 592 |
|
/* |
| 593 |
|
* Recompute bounding box for line. |
| 594 |
|
*/ |
| 595 |
|
|
| 596 |
|
ComputeLineBbox(canvas, linePtr); |
| 597 |
|
|
| 598 |
|
return TCL_OK; |
| 599 |
|
} |
| 600 |
|
|
| 601 |
|
/* |
| 602 |
|
*-------------------------------------------------------------- |
| 603 |
|
* |
| 604 |
|
* DeleteLine -- |
| 605 |
|
* |
| 606 |
|
* This procedure is called to clean up the data structure |
| 607 |
|
* associated with a line item. |
| 608 |
|
* |
| 609 |
|
* Results: |
| 610 |
|
* None. |
| 611 |
|
* |
| 612 |
|
* Side effects: |
| 613 |
|
* Resources associated with itemPtr are released. |
| 614 |
|
* |
| 615 |
|
*-------------------------------------------------------------- |
| 616 |
|
*/ |
| 617 |
|
|
| 618 |
|
static void |
| 619 |
|
DeleteLine(canvas, itemPtr, display) |
| 620 |
|
Tk_Canvas canvas; /* Info about overall canvas widget. */ |
| 621 |
|
Tk_Item *itemPtr; /* Item that is being deleted. */ |
| 622 |
|
Display *display; /* Display containing window for |
| 623 |
|
* canvas. */ |
| 624 |
|
{ |
| 625 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 626 |
|
|
| 627 |
|
Tk_DeleteOutline(display, &(linePtr->outline)); |
| 628 |
|
if (linePtr->coordPtr != NULL) { |
| 629 |
|
ckfree((char *) linePtr->coordPtr); |
| 630 |
|
} |
| 631 |
|
if (linePtr->arrowGC != None) { |
| 632 |
|
Tk_FreeGC(display, linePtr->arrowGC); |
| 633 |
|
} |
| 634 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 635 |
|
ckfree((char *) linePtr->firstArrowPtr); |
| 636 |
|
} |
| 637 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 638 |
|
ckfree((char *) linePtr->lastArrowPtr); |
| 639 |
|
} |
| 640 |
|
} |
| 641 |
|
|
| 642 |
|
/* |
| 643 |
|
*-------------------------------------------------------------- |
| 644 |
|
* |
| 645 |
|
* ComputeLineBbox -- |
| 646 |
|
* |
| 647 |
|
* This procedure is invoked to compute the bounding box of |
| 648 |
|
* all the pixels that may be drawn as part of a line. |
| 649 |
|
* |
| 650 |
|
* Results: |
| 651 |
|
* None. |
| 652 |
|
* |
| 653 |
|
* Side effects: |
| 654 |
|
* The fields x1, y1, x2, and y2 are updated in the header |
| 655 |
|
* for itemPtr. |
| 656 |
|
* |
| 657 |
|
*-------------------------------------------------------------- |
| 658 |
|
*/ |
| 659 |
|
|
| 660 |
|
static void |
| 661 |
|
ComputeLineBbox(canvas, linePtr) |
| 662 |
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
| 663 |
|
LineItem *linePtr; /* Item whose bbos is to be |
| 664 |
|
* recomputed. */ |
| 665 |
|
{ |
| 666 |
|
double *coordPtr; |
| 667 |
|
int i, intWidth; |
| 668 |
|
double width; |
| 669 |
|
Tk_State state = linePtr->header.state; |
| 670 |
|
Tk_TSOffset *tsoffset; |
| 671 |
|
|
| 672 |
|
if(state == TK_STATE_NULL) { |
| 673 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 674 |
|
} |
| 675 |
|
|
| 676 |
|
if (!(linePtr->numPoints) || (state==TK_STATE_HIDDEN)) { |
| 677 |
|
linePtr->header.x1 = -1; |
| 678 |
|
linePtr->header.x2 = -1; |
| 679 |
|
linePtr->header.y1 = -1; |
| 680 |
|
linePtr->header.y2 = -1; |
| 681 |
|
return; |
| 682 |
|
} |
| 683 |
|
|
| 684 |
|
width = linePtr->outline.width; |
| 685 |
|
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)linePtr) { |
| 686 |
|
if (linePtr->outline.activeWidth>width) { |
| 687 |
|
width = linePtr->outline.activeWidth; |
| 688 |
|
} |
| 689 |
|
} else if (state==TK_STATE_DISABLED) { |
| 690 |
|
if (linePtr->outline.disabledWidth>0) { |
| 691 |
|
width = linePtr->outline.disabledWidth; |
| 692 |
|
} |
| 693 |
|
} |
| 694 |
|
|
| 695 |
|
coordPtr = linePtr->coordPtr; |
| 696 |
|
linePtr->header.x1 = linePtr->header.x2 = (int) *coordPtr; |
| 697 |
|
linePtr->header.y1 = linePtr->header.y2 = (int) coordPtr[1]; |
| 698 |
|
|
| 699 |
|
/* |
| 700 |
|
* Compute the bounding box of all the points in the line, |
| 701 |
|
* then expand in all directions by the line's width to take |
| 702 |
|
* care of butting or rounded corners and projecting or |
| 703 |
|
* rounded caps. This expansion is an overestimate (worst-case |
| 704 |
|
* is square root of two over two) but it's simple. Don't do |
| 705 |
|
* anything special for curves. This causes an additional |
| 706 |
|
* overestimate in the bounding box, but is faster. |
| 707 |
|
*/ |
| 708 |
|
|
| 709 |
|
for (i = 1, coordPtr = linePtr->coordPtr+2; i < linePtr->numPoints; |
| 710 |
|
i++, coordPtr += 2) { |
| 711 |
|
TkIncludePoint((Tk_Item *) linePtr, coordPtr); |
| 712 |
|
} |
| 713 |
|
width = linePtr->outline.width; |
| 714 |
|
if (width < 1.0) { |
| 715 |
|
width = 1.0; |
| 716 |
|
} |
| 717 |
|
if (linePtr->arrow != ARROWS_NONE) { |
| 718 |
|
if (linePtr->arrow != ARROWS_LAST) { |
| 719 |
|
TkIncludePoint((Tk_Item *) linePtr, linePtr->firstArrowPtr); |
| 720 |
|
} |
| 721 |
|
if (linePtr->arrow != ARROWS_FIRST) { |
| 722 |
|
TkIncludePoint((Tk_Item *) linePtr, linePtr->lastArrowPtr); |
| 723 |
|
} |
| 724 |
|
} |
| 725 |
|
|
| 726 |
|
tsoffset = &linePtr->outline.tsoffset; |
| 727 |
|
if (tsoffset->flags & TK_OFFSET_INDEX) { |
| 728 |
|
double *coordPtr = linePtr->coordPtr + (tsoffset->flags & ~TK_OFFSET_INDEX); |
| 729 |
|
if (tsoffset->flags <= 0) { |
| 730 |
|
coordPtr = linePtr->coordPtr; |
| 731 |
|
if ((linePtr->arrow == ARROWS_FIRST) || (linePtr->arrow == ARROWS_BOTH)) { |
| 732 |
|
coordPtr = linePtr->firstArrowPtr; |
| 733 |
|
} |
| 734 |
|
} |
| 735 |
|
if (tsoffset->flags > (linePtr->numPoints * 2)) { |
| 736 |
|
coordPtr = linePtr->coordPtr + (linePtr->numPoints * 2); |
| 737 |
|
if ((linePtr->arrow == ARROWS_LAST) || (linePtr->arrow == ARROWS_BOTH)) { |
| 738 |
|
coordPtr = linePtr->lastArrowPtr; |
| 739 |
|
} |
| 740 |
|
} |
| 741 |
|
tsoffset->xoffset = (int) (coordPtr[0] + 0.5); |
| 742 |
|
tsoffset->yoffset = (int) (coordPtr[1] + 0.5); |
| 743 |
|
} else { |
| 744 |
|
if (tsoffset->flags & TK_OFFSET_LEFT) { |
| 745 |
|
tsoffset->xoffset = linePtr->header.x1; |
| 746 |
|
} else if (tsoffset->flags & TK_OFFSET_CENTER) { |
| 747 |
|
tsoffset->xoffset = (linePtr->header.x1 + linePtr->header.x2)/2; |
| 748 |
|
} else if (tsoffset->flags & TK_OFFSET_RIGHT) { |
| 749 |
|
tsoffset->xoffset = linePtr->header.x2; |
| 750 |
|
} |
| 751 |
|
if (tsoffset->flags & TK_OFFSET_TOP) { |
| 752 |
|
tsoffset->yoffset = linePtr->header.y1; |
| 753 |
|
} else if (tsoffset->flags & TK_OFFSET_MIDDLE) { |
| 754 |
|
tsoffset->yoffset = (linePtr->header.y1 + linePtr->header.y2)/2; |
| 755 |
|
} else if (tsoffset->flags & TK_OFFSET_BOTTOM) { |
| 756 |
|
tsoffset->yoffset = linePtr->header.y2; |
| 757 |
|
} |
| 758 |
|
} |
| 759 |
|
|
| 760 |
|
intWidth = (int) (width + 0.5); |
| 761 |
|
linePtr->header.x1 -= intWidth; |
| 762 |
|
linePtr->header.x2 += intWidth; |
| 763 |
|
linePtr->header.y1 -= intWidth; |
| 764 |
|
linePtr->header.y2 += intWidth; |
| 765 |
|
|
| 766 |
|
if (linePtr->numPoints==1) { |
| 767 |
|
linePtr->header.x1 -= 1; |
| 768 |
|
linePtr->header.x2 += 1; |
| 769 |
|
linePtr->header.y1 -= 1; |
| 770 |
|
linePtr->header.y2 += 1; |
| 771 |
|
return; |
| 772 |
|
} |
| 773 |
|
|
| 774 |
|
/* |
| 775 |
|
* For mitered lines, make a second pass through all the points. |
| 776 |
|
* Compute the locations of the two miter vertex points and add |
| 777 |
|
* those into the bounding box. |
| 778 |
|
*/ |
| 779 |
|
|
| 780 |
|
if (linePtr->joinStyle == JoinMiter) { |
| 781 |
|
for (i = linePtr->numPoints, coordPtr = linePtr->coordPtr; i >= 3; |
| 782 |
|
i--, coordPtr += 2) { |
| 783 |
|
double miter[4]; |
| 784 |
|
int j; |
| 785 |
|
|
| 786 |
|
if (TkGetMiterPoints(coordPtr, coordPtr+2, coordPtr+4, |
| 787 |
|
width, miter, miter+2)) { |
| 788 |
|
for (j = 0; j < 4; j += 2) { |
| 789 |
|
TkIncludePoint((Tk_Item *) linePtr, miter+j); |
| 790 |
|
} |
| 791 |
|
} |
| 792 |
|
} |
| 793 |
|
} |
| 794 |
|
|
| 795 |
|
/* |
| 796 |
|
* Add in the sizes of arrowheads, if any. |
| 797 |
|
*/ |
| 798 |
|
|
| 799 |
|
if (linePtr->arrow != ARROWS_NONE) { |
| 800 |
|
if (linePtr->arrow != ARROWS_LAST) { |
| 801 |
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
| 802 |
|
i++, coordPtr += 2) { |
| 803 |
|
TkIncludePoint((Tk_Item *) linePtr, coordPtr); |
| 804 |
|
} |
| 805 |
|
} |
| 806 |
|
if (linePtr->arrow != ARROWS_FIRST) { |
| 807 |
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
| 808 |
|
i++, coordPtr += 2) { |
| 809 |
|
TkIncludePoint((Tk_Item *) linePtr, coordPtr); |
| 810 |
|
} |
| 811 |
|
} |
| 812 |
|
} |
| 813 |
|
|
| 814 |
|
/* |
| 815 |
|
* Add one more pixel of fudge factor just to be safe (e.g. |
| 816 |
|
* X may round differently than we do). |
| 817 |
|
*/ |
| 818 |
|
|
| 819 |
|
linePtr->header.x1 -= 1; |
| 820 |
|
linePtr->header.x2 += 1; |
| 821 |
|
linePtr->header.y1 -= 1; |
| 822 |
|
linePtr->header.y2 += 1; |
| 823 |
|
} |
| 824 |
|
|
| 825 |
|
/* |
| 826 |
|
*-------------------------------------------------------------- |
| 827 |
|
* |
| 828 |
|
* DisplayLine -- |
| 829 |
|
* |
| 830 |
|
* This procedure is invoked to draw a line item in a given |
| 831 |
|
* drawable. |
| 832 |
|
* |
| 833 |
|
* Results: |
| 834 |
|
* None. |
| 835 |
|
* |
| 836 |
|
* Side effects: |
| 837 |
|
* ItemPtr is drawn in drawable using the transformation |
| 838 |
|
* information in canvas. |
| 839 |
|
* |
| 840 |
|
*-------------------------------------------------------------- |
| 841 |
|
*/ |
| 842 |
|
|
| 843 |
|
static void |
| 844 |
|
DisplayLine(canvas, itemPtr, display, drawable, x, y, width, height) |
| 845 |
|
Tk_Canvas canvas; /* Canvas that contains item. */ |
| 846 |
|
Tk_Item *itemPtr; /* Item to be displayed. */ |
| 847 |
|
Display *display; /* Display on which to draw item. */ |
| 848 |
|
Drawable drawable; /* Pixmap or window in which to draw |
| 849 |
|
* item. */ |
| 850 |
|
int x, y, width, height; /* Describes region of canvas that |
| 851 |
|
* must be redisplayed (not used). */ |
| 852 |
|
{ |
| 853 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 854 |
|
XPoint staticPoints[MAX_STATIC_POINTS]; |
| 855 |
|
XPoint *pointPtr; |
| 856 |
|
XPoint *pPtr; |
| 857 |
|
double *coordPtr, linewidth; |
| 858 |
|
int i, numPoints; |
| 859 |
|
Tk_State state = itemPtr->state; |
| 860 |
|
Pixmap stipple = linePtr->outline.stipple; |
| 861 |
|
|
| 862 |
|
if ((!linePtr->numPoints)||(linePtr->outline.gc==None)) { |
| 863 |
|
return; |
| 864 |
|
} |
| 865 |
|
|
| 866 |
|
if (state == TK_STATE_NULL) { |
| 867 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 868 |
|
} |
| 869 |
|
linewidth = linePtr->outline.width; |
| 870 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
| 871 |
|
if (linePtr->outline.activeStipple!=None) { |
| 872 |
|
stipple = linePtr->outline.activeStipple; |
| 873 |
|
} |
| 874 |
|
if (linePtr->outline.activeWidth>linewidth) { |
| 875 |
|
linewidth = linePtr->outline.activeWidth; |
| 876 |
|
} |
| 877 |
|
} else if (state==TK_STATE_DISABLED) { |
| 878 |
|
if (linePtr->outline.disabledStipple!=None) { |
| 879 |
|
stipple = linePtr->outline.disabledStipple; |
| 880 |
|
} |
| 881 |
|
if (linePtr->outline.disabledWidth>linewidth) { |
| 882 |
|
linewidth = linePtr->outline.activeWidth; |
| 883 |
|
} |
| 884 |
|
} |
| 885 |
|
/* |
| 886 |
|
* Build up an array of points in screen coordinates. Use a |
| 887 |
|
* static array unless the line has an enormous number of points; |
| 888 |
|
* in this case, dynamically allocate an array. For smoothed lines, |
| 889 |
|
* generate the curve points on each redisplay. |
| 890 |
|
*/ |
| 891 |
|
|
| 892 |
|
if ((linePtr->smooth) && (linePtr->numPoints > 2)) { |
| 893 |
|
numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, |
| 894 |
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
| 895 |
|
(double *) NULL); |
| 896 |
|
} else { |
| 897 |
|
numPoints = linePtr->numPoints; |
| 898 |
|
} |
| 899 |
|
|
| 900 |
|
if (numPoints <= MAX_STATIC_POINTS) { |
| 901 |
|
pointPtr = staticPoints; |
| 902 |
|
} else { |
| 903 |
|
pointPtr = (XPoint *) ckalloc((unsigned) (numPoints * sizeof(XPoint))); |
| 904 |
|
} |
| 905 |
|
|
| 906 |
|
if ((linePtr->smooth) && (linePtr->numPoints > 2)) { |
| 907 |
|
numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, |
| 908 |
|
linePtr->numPoints, linePtr->splineSteps, pointPtr, |
| 909 |
|
(double *) NULL); |
| 910 |
|
} else { |
| 911 |
|
for (i = 0, coordPtr = linePtr->coordPtr, pPtr = pointPtr; |
| 912 |
|
i < linePtr->numPoints; i += 1, coordPtr += 2, pPtr++) { |
| 913 |
|
Tk_CanvasDrawableCoords(canvas, coordPtr[0], coordPtr[1], |
| 914 |
|
&pPtr->x, &pPtr->y); |
| 915 |
|
} |
| 916 |
|
} |
| 917 |
|
|
| 918 |
|
/* |
| 919 |
|
* Display line, the free up line storage if it was dynamically |
| 920 |
|
* allocated. If we're stippling, then modify the stipple offset |
| 921 |
|
* in the GC. Be sure to reset the offset when done, since the |
| 922 |
|
* GC is supposed to be read-only. |
| 923 |
|
*/ |
| 924 |
|
|
| 925 |
|
if (Tk_ChangeOutlineGC(canvas, itemPtr, &(linePtr->outline))) { |
| 926 |
|
Tk_CanvasSetOffset(canvas, linePtr->arrowGC, &linePtr->outline.tsoffset); |
| 927 |
|
} |
| 928 |
|
if (numPoints>1) { |
| 929 |
|
XDrawLines(display, drawable, linePtr->outline.gc, pointPtr, numPoints, |
| 930 |
|
CoordModeOrigin); |
| 931 |
|
} else { |
| 932 |
|
int intwidth = (int) (linewidth + 0.5); |
| 933 |
|
if (intwidth<1) { |
| 934 |
|
intwidth=1; |
| 935 |
|
} |
| 936 |
|
XFillArc(display, drawable, linePtr->outline.gc, |
| 937 |
|
pointPtr->x - intwidth/2, pointPtr->y - intwidth/2, |
| 938 |
|
(unsigned int)intwidth+1, (unsigned int)intwidth+1, 0, 64*360); |
| 939 |
|
} |
| 940 |
|
if (pointPtr != staticPoints) { |
| 941 |
|
ckfree((char *) pointPtr); |
| 942 |
|
} |
| 943 |
|
|
| 944 |
|
/* |
| 945 |
|
* Display arrowheads, if they are wanted. |
| 946 |
|
*/ |
| 947 |
|
|
| 948 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 949 |
|
TkFillPolygon(canvas, linePtr->firstArrowPtr, PTS_IN_ARROW, |
| 950 |
|
display, drawable, linePtr->arrowGC, NULL); |
| 951 |
|
} |
| 952 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 953 |
|
TkFillPolygon(canvas, linePtr->lastArrowPtr, PTS_IN_ARROW, |
| 954 |
|
display, drawable, linePtr->arrowGC, NULL); |
| 955 |
|
} |
| 956 |
|
if (Tk_ResetOutlineGC(canvas, itemPtr, &(linePtr->outline))) { |
| 957 |
|
XSetTSOrigin(display, linePtr->arrowGC, 0, 0); |
| 958 |
|
} |
| 959 |
|
} |
| 960 |
|
|
| 961 |
|
/* |
| 962 |
|
*-------------------------------------------------------------- |
| 963 |
|
* |
| 964 |
|
* LineInsert -- |
| 965 |
|
* |
| 966 |
|
* Insert coords into a line item at a given index. |
| 967 |
|
* |
| 968 |
|
* Results: |
| 969 |
|
* None. |
| 970 |
|
* |
| 971 |
|
* Side effects: |
| 972 |
|
* The coords in the given item is modified. |
| 973 |
|
* |
| 974 |
|
*-------------------------------------------------------------- |
| 975 |
|
*/ |
| 976 |
|
|
| 977 |
|
static void |
| 978 |
|
LineInsert(canvas, itemPtr, beforeThis, obj) |
| 979 |
|
Tk_Canvas canvas; /* Canvas containing text item. */ |
| 980 |
|
Tk_Item *itemPtr; /* Line item to be modified. */ |
| 981 |
|
int beforeThis; /* Index before which new coordinates |
| 982 |
|
* are to be inserted. */ |
| 983 |
|
Tcl_Obj *obj; /* New coordinates to be inserted. */ |
| 984 |
|
{ |
| 985 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 986 |
|
int length, argc, i; |
| 987 |
|
double *new, *coordPtr; |
| 988 |
|
Tk_State state = itemPtr->state; |
| 989 |
|
Tcl_Obj **objv; |
| 990 |
|
|
| 991 |
|
if(state == TK_STATE_NULL) { |
| 992 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 993 |
|
} |
| 994 |
|
|
| 995 |
|
if (!obj || (Tcl_ListObjGetElements((Tcl_Interp *) NULL, obj, &argc, &objv) != TCL_OK) |
| 996 |
|
|| !argc || argc&1) { |
| 997 |
|
return; |
| 998 |
|
} |
| 999 |
|
length = 2*linePtr->numPoints; |
| 1000 |
|
if (beforeThis < 0) { |
| 1001 |
|
beforeThis = 0; |
| 1002 |
|
} |
| 1003 |
|
if (beforeThis > length) { |
| 1004 |
|
beforeThis = length; |
| 1005 |
|
} |
| 1006 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 1007 |
|
linePtr->coordPtr[0] = linePtr->firstArrowPtr[0]; |
| 1008 |
|
linePtr->coordPtr[1] = linePtr->firstArrowPtr[1]; |
| 1009 |
|
} |
| 1010 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 1011 |
|
linePtr->coordPtr[length-2] = linePtr->lastArrowPtr[0]; |
| 1012 |
|
linePtr->coordPtr[length-1] = linePtr->lastArrowPtr[1]; |
| 1013 |
|
} |
| 1014 |
|
new = (double *) ckalloc((unsigned)(sizeof(double) * (length + argc))); |
| 1015 |
|
for(i=0; i<beforeThis; i++) { |
| 1016 |
|
new[i] = linePtr->coordPtr[i]; |
| 1017 |
|
} |
| 1018 |
|
for(i=0; i<argc; i++) { |
| 1019 |
|
if (Tcl_GetDoubleFromObj((Tcl_Interp *) NULL,objv[i], |
| 1020 |
|
new+(i+beforeThis))!=TCL_OK) { |
| 1021 |
|
Tcl_ResetResult(((TkCanvas *)canvas)->interp); |
| 1022 |
|
ckfree((char *) new); |
| 1023 |
|
return; |
| 1024 |
|
} |
| 1025 |
|
} |
| 1026 |
|
|
| 1027 |
|
for(i=beforeThis; i<length; i++) { |
| 1028 |
|
new[i+argc] = linePtr->coordPtr[i]; |
| 1029 |
|
} |
| 1030 |
|
if(linePtr->coordPtr) ckfree((char *)linePtr->coordPtr); |
| 1031 |
|
linePtr->coordPtr = new; |
| 1032 |
|
linePtr->numPoints = (length + argc)/2; |
| 1033 |
|
|
| 1034 |
|
if ((length>3) && (state != TK_STATE_HIDDEN)) { |
| 1035 |
|
/* |
| 1036 |
|
* This is some optimizing code that will result that only the part |
| 1037 |
|
* of the polygon that changed (and the objects that are overlapping |
| 1038 |
|
* with that part) need to be redrawn. A special flag is set that |
| 1039 |
|
* instructs the general canvas code not to redraw the whole |
| 1040 |
|
* object. If this flag is not set, the canvas will do the redrawing, |
| 1041 |
|
* otherwise I have to do it here. |
| 1042 |
|
*/ |
| 1043 |
|
itemPtr->redraw_flags |= TK_ITEM_DONT_REDRAW; |
| 1044 |
|
|
| 1045 |
|
if (beforeThis>0) {beforeThis -= 2; argc+=2; } |
| 1046 |
|
if ((beforeThis+argc)<length) argc+=2; |
| 1047 |
|
if (linePtr->smooth) { |
| 1048 |
|
if(beforeThis>0) { |
| 1049 |
|
beforeThis-=2; argc+=2; |
| 1050 |
|
} |
| 1051 |
|
if((beforeThis+argc+2)<length) { |
| 1052 |
|
argc+=2; |
| 1053 |
|
} |
| 1054 |
|
} |
| 1055 |
|
itemPtr->x1 = itemPtr->x2 = (int) linePtr->coordPtr[beforeThis]; |
| 1056 |
|
itemPtr->y1 = itemPtr->y2 = (int) linePtr->coordPtr[beforeThis+1]; |
| 1057 |
|
if ((linePtr->firstArrowPtr != NULL) && (beforeThis<1)) { |
| 1058 |
|
/* include old first arrow */ |
| 1059 |
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
| 1060 |
|
i++, coordPtr += 2) { |
| 1061 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1062 |
|
} |
| 1063 |
|
} |
| 1064 |
|
if ((linePtr->lastArrowPtr != NULL) && ((beforeThis+argc)>=length)) { |
| 1065 |
|
/* include old last arrow */ |
| 1066 |
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
| 1067 |
|
i++, coordPtr += 2) { |
| 1068 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1069 |
|
} |
| 1070 |
|
} |
| 1071 |
|
coordPtr = linePtr->coordPtr+beforeThis+2; |
| 1072 |
|
for(i=2; i<argc; i+=2) { |
| 1073 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1074 |
|
coordPtr+=2; |
| 1075 |
|
} |
| 1076 |
|
} |
| 1077 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 1078 |
|
ckfree((char *) linePtr->firstArrowPtr); |
| 1079 |
|
linePtr->firstArrowPtr = NULL; |
| 1080 |
|
} |
| 1081 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 1082 |
|
ckfree((char *) linePtr->lastArrowPtr); |
| 1083 |
|
linePtr->lastArrowPtr = NULL; |
| 1084 |
|
} |
| 1085 |
|
if (linePtr->arrow != ARROWS_NONE) { |
| 1086 |
|
ConfigureArrows(canvas, linePtr); |
| 1087 |
|
} |
| 1088 |
|
|
| 1089 |
|
if(itemPtr->redraw_flags & TK_ITEM_DONT_REDRAW) { |
| 1090 |
|
double width; |
| 1091 |
|
int intWidth; |
| 1092 |
|
if ((linePtr->firstArrowPtr != NULL) && (beforeThis>2)) { |
| 1093 |
|
/* include new first arrow */ |
| 1094 |
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
| 1095 |
|
i++, coordPtr += 2) { |
| 1096 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1097 |
|
} |
| 1098 |
|
} |
| 1099 |
|
if ((linePtr->lastArrowPtr != NULL) && ((beforeThis+argc)<(length-2))) { |
| 1100 |
|
/* include new right arrow */ |
| 1101 |
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
| 1102 |
|
i++, coordPtr += 2) { |
| 1103 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1104 |
|
} |
| 1105 |
|
} |
| 1106 |
|
width = linePtr->outline.width; |
| 1107 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
| 1108 |
|
if (linePtr->outline.activeWidth>width) { |
| 1109 |
|
width = linePtr->outline.activeWidth; |
| 1110 |
|
} |
| 1111 |
|
} else if (state==TK_STATE_DISABLED) { |
| 1112 |
|
if (linePtr->outline.disabledWidth>0) { |
| 1113 |
|
width = linePtr->outline.disabledWidth; |
| 1114 |
|
} |
| 1115 |
|
} |
| 1116 |
|
intWidth = (int) (width + 0.5); |
| 1117 |
|
if (intWidth < 1) { |
| 1118 |
|
intWidth = 1; |
| 1119 |
|
} |
| 1120 |
|
itemPtr->x1 -= intWidth; itemPtr->y1 -= intWidth; |
| 1121 |
|
itemPtr->x2 += intWidth; itemPtr->y2 += intWidth; |
| 1122 |
|
Tk_CanvasEventuallyRedraw(canvas, itemPtr->x1, itemPtr->y1, |
| 1123 |
|
itemPtr->x2, itemPtr->y2); |
| 1124 |
|
} |
| 1125 |
|
|
| 1126 |
|
ComputeLineBbox(canvas, linePtr); |
| 1127 |
|
} |
| 1128 |
|
|
| 1129 |
|
/* |
| 1130 |
|
*-------------------------------------------------------------- |
| 1131 |
|
* |
| 1132 |
|
* LineDeleteCoords -- |
| 1133 |
|
* |
| 1134 |
|
* Delete one or more coordinates from a line item. |
| 1135 |
|
* |
| 1136 |
|
* Results: |
| 1137 |
|
* None. |
| 1138 |
|
* |
| 1139 |
|
* Side effects: |
| 1140 |
|
* Characters between "first" and "last", inclusive, get |
| 1141 |
|
* deleted from itemPtr. |
| 1142 |
|
* |
| 1143 |
|
*-------------------------------------------------------------- |
| 1144 |
|
*/ |
| 1145 |
|
|
| 1146 |
|
static void |
| 1147 |
|
LineDeleteCoords(canvas, itemPtr, first, last) |
| 1148 |
|
Tk_Canvas canvas; /* Canvas containing itemPtr. */ |
| 1149 |
|
Tk_Item *itemPtr; /* Item in which to delete characters. */ |
| 1150 |
|
int first; /* Index of first character to delete. */ |
| 1151 |
|
int last; /* Index of last character to delete. */ |
| 1152 |
|
{ |
| 1153 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 1154 |
|
int count, i, first1, last1; |
| 1155 |
|
int length = 2*linePtr->numPoints; |
| 1156 |
|
double *coordPtr; |
| 1157 |
|
Tk_State state = itemPtr->state; |
| 1158 |
|
|
| 1159 |
|
if(state == TK_STATE_NULL) { |
| 1160 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 1161 |
|
} |
| 1162 |
|
|
| 1163 |
|
first &= -2; |
| 1164 |
|
last &= -2; |
| 1165 |
|
|
| 1166 |
|
if (first < 0) { |
| 1167 |
|
first = 0; |
| 1168 |
|
} |
| 1169 |
|
if (last >= length) { |
| 1170 |
|
last = length-2; |
| 1171 |
|
} |
| 1172 |
|
if (first > last) { |
| 1173 |
|
return; |
| 1174 |
|
} |
| 1175 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 1176 |
|
linePtr->coordPtr[0] = linePtr->firstArrowPtr[0]; |
| 1177 |
|
linePtr->coordPtr[1] = linePtr->firstArrowPtr[1]; |
| 1178 |
|
} |
| 1179 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 1180 |
|
linePtr->coordPtr[length-2] = linePtr->lastArrowPtr[0]; |
| 1181 |
|
linePtr->coordPtr[length-1] = linePtr->lastArrowPtr[1]; |
| 1182 |
|
} |
| 1183 |
|
first1 = first; last1 = last; |
| 1184 |
|
if(first1>0) first1 -= 2; |
| 1185 |
|
if(last1<length-2) last1 += 2; |
| 1186 |
|
if (linePtr->smooth) { |
| 1187 |
|
if(first1>0) first1 -= 2; |
| 1188 |
|
if(last1<length-2) last1 += 2; |
| 1189 |
|
} |
| 1190 |
|
|
| 1191 |
|
if((first1<2) && (last1 >= length-2)) { |
| 1192 |
|
/* |
| 1193 |
|
* This is some optimizing code that will result that only the part |
| 1194 |
|
* of the line that changed (and the objects that are overlapping |
| 1195 |
|
* with that part) need to be redrawn. A special flag is set that |
| 1196 |
|
* instructs the general canvas code not to redraw the whole |
| 1197 |
|
* object. If this flag is set, the redrawing has to be done here, |
| 1198 |
|
* otherwise the general Canvas code will take care of it. |
| 1199 |
|
*/ |
| 1200 |
|
|
| 1201 |
|
itemPtr->redraw_flags |= TK_ITEM_DONT_REDRAW; |
| 1202 |
|
itemPtr->x1 = itemPtr->x2 = (int) linePtr->coordPtr[first1]; |
| 1203 |
|
itemPtr->y1 = itemPtr->y2 = (int) linePtr->coordPtr[first1+1]; |
| 1204 |
|
if ((linePtr->firstArrowPtr != NULL) && (first1<2)) { |
| 1205 |
|
/* include old first arrow */ |
| 1206 |
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
| 1207 |
|
i++, coordPtr += 2) { |
| 1208 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1209 |
|
} |
| 1210 |
|
} |
| 1211 |
|
if ((linePtr->lastArrowPtr != NULL) && (last1>=length-2)) { |
| 1212 |
|
/* include old last arrow */ |
| 1213 |
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
| 1214 |
|
i++, coordPtr += 2) { |
| 1215 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1216 |
|
} |
| 1217 |
|
} |
| 1218 |
|
coordPtr = linePtr->coordPtr+first1+2; |
| 1219 |
|
for (i=first1+2; i<=last1; i+=2) { |
| 1220 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1221 |
|
coordPtr+=2; |
| 1222 |
|
} |
| 1223 |
|
} |
| 1224 |
|
|
| 1225 |
|
count = last + 2 - first; |
| 1226 |
|
for (i=last+2; i<length; i++) { |
| 1227 |
|
linePtr->coordPtr[i-count] = linePtr->coordPtr[i]; |
| 1228 |
|
} |
| 1229 |
|
linePtr->numPoints -= count/2; |
| 1230 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 1231 |
|
ckfree((char *) linePtr->firstArrowPtr); |
| 1232 |
|
linePtr->firstArrowPtr = NULL; |
| 1233 |
|
} |
| 1234 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 1235 |
|
ckfree((char *) linePtr->lastArrowPtr); |
| 1236 |
|
linePtr->lastArrowPtr = NULL; |
| 1237 |
|
} |
| 1238 |
|
if (linePtr->arrow != ARROWS_NONE) { |
| 1239 |
|
ConfigureArrows(canvas, linePtr); |
| 1240 |
|
} |
| 1241 |
|
if(itemPtr->redraw_flags & TK_ITEM_DONT_REDRAW) { |
| 1242 |
|
double width; |
| 1243 |
|
int intWidth; |
| 1244 |
|
if ((linePtr->firstArrowPtr != NULL) && (first1<4)) { |
| 1245 |
|
/* include new first arrow */ |
| 1246 |
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
| 1247 |
|
i++, coordPtr += 2) { |
| 1248 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1249 |
|
} |
| 1250 |
|
} |
| 1251 |
|
if ((linePtr->lastArrowPtr != NULL) && (last1>(length-4))) { |
| 1252 |
|
/* include new right arrow */ |
| 1253 |
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
| 1254 |
|
i++, coordPtr += 2) { |
| 1255 |
|
TkIncludePoint(itemPtr, coordPtr); |
| 1256 |
|
} |
| 1257 |
|
} |
| 1258 |
|
width = linePtr->outline.width; |
| 1259 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
| 1260 |
|
if (linePtr->outline.activeWidth>width) { |
| 1261 |
|
width = linePtr->outline.activeWidth; |
| 1262 |
|
} |
| 1263 |
|
} else if (state==TK_STATE_DISABLED) { |
| 1264 |
|
if (linePtr->outline.disabledWidth>0) { |
| 1265 |
|
width = linePtr->outline.disabledWidth; |
| 1266 |
|
} |
| 1267 |
|
} |
| 1268 |
|
intWidth = (int) (width + 0.5); |
| 1269 |
|
if (intWidth < 1) { |
| 1270 |
|
intWidth = 1; |
| 1271 |
|
} |
| 1272 |
|
itemPtr->x1 -= intWidth; itemPtr->y1 -= intWidth; |
| 1273 |
|
itemPtr->x2 += intWidth; itemPtr->y2 += intWidth; |
| 1274 |
|
Tk_CanvasEventuallyRedraw(canvas, itemPtr->x1, itemPtr->y1, |
| 1275 |
|
itemPtr->x2, itemPtr->y2); |
| 1276 |
|
} |
| 1277 |
|
ComputeLineBbox(canvas, linePtr); |
| 1278 |
|
} |
| 1279 |
|
|
| 1280 |
|
/* |
| 1281 |
|
*-------------------------------------------------------------- |
| 1282 |
|
* |
| 1283 |
|
* LineToPoint -- |
| 1284 |
|
* |
| 1285 |
|
* Computes the distance from a given point to a given |
| 1286 |
|
* line, in canvas units. |
| 1287 |
|
* |
| 1288 |
|
* Results: |
| 1289 |
|
* The return value is 0 if the point whose x and y coordinates |
| 1290 |
|
* are pointPtr[0] and pointPtr[1] is inside the line. If the |
| 1291 |
|
* point isn't inside the line then the return value is the |
| 1292 |
|
* distance from the point to the line. |
| 1293 |
|
* |
| 1294 |
|
* Side effects: |
| 1295 |
|
* None. |
| 1296 |
|
* |
| 1297 |
|
*-------------------------------------------------------------- |
| 1298 |
|
*/ |
| 1299 |
|
|
| 1300 |
|
/* ARGSUSED */ |
| 1301 |
|
static double |
| 1302 |
|
LineToPoint(canvas, itemPtr, pointPtr) |
| 1303 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
| 1304 |
|
Tk_Item *itemPtr; /* Item to check against point. */ |
| 1305 |
|
double *pointPtr; /* Pointer to x and y coordinates. */ |
| 1306 |
|
{ |
| 1307 |
|
Tk_State state = itemPtr->state; |
| 1308 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 1309 |
|
double *coordPtr, *linePoints; |
| 1310 |
|
double staticSpace[2*MAX_STATIC_POINTS]; |
| 1311 |
|
double poly[10]; |
| 1312 |
|
double bestDist, dist, width; |
| 1313 |
|
int numPoints, count; |
| 1314 |
|
int changedMiterToBevel; /* Non-zero means that a mitered corner |
| 1315 |
|
* had to be treated as beveled after all |
| 1316 |
|
* because the angle was < 11 degrees. */ |
| 1317 |
|
|
| 1318 |
|
bestDist = 1.0e36; |
| 1319 |
|
|
| 1320 |
|
/* |
| 1321 |
|
* Handle smoothed lines by generating an expanded set of points |
| 1322 |
|
* against which to do the check. |
| 1323 |
|
*/ |
| 1324 |
|
|
| 1325 |
|
if(state == TK_STATE_NULL) { |
| 1326 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 1327 |
|
} |
| 1328 |
|
|
| 1329 |
|
width = linePtr->outline.width; |
| 1330 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
| 1331 |
|
if (linePtr->outline.activeWidth>width) { |
| 1332 |
|
width = linePtr->outline.activeWidth; |
| 1333 |
|
} |
| 1334 |
|
} else if (state==TK_STATE_DISABLED) { |
| 1335 |
|
if (linePtr->outline.disabledWidth>0) { |
| 1336 |
|
width = linePtr->outline.disabledWidth; |
| 1337 |
|
} |
| 1338 |
|
} |
| 1339 |
|
|
| 1340 |
|
if ((linePtr->smooth) && (linePtr->numPoints > 2)) { |
| 1341 |
|
numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, |
| 1342 |
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
| 1343 |
|
(double *) NULL); |
| 1344 |
|
if (numPoints <= MAX_STATIC_POINTS) { |
| 1345 |
|
linePoints = staticSpace; |
| 1346 |
|
} else { |
| 1347 |
|
linePoints = (double *) ckalloc((unsigned) |
| 1348 |
|
(2*numPoints*sizeof(double))); |
| 1349 |
|
} |
| 1350 |
|
numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, |
| 1351 |
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
| 1352 |
|
linePoints); |
| 1353 |
|
} else { |
| 1354 |
|
numPoints = linePtr->numPoints; |
| 1355 |
|
linePoints = linePtr->coordPtr; |
| 1356 |
|
} |
| 1357 |
|
|
| 1358 |
|
if (width < 1.0) { |
| 1359 |
|
width = 1.0; |
| 1360 |
|
} |
| 1361 |
|
|
| 1362 |
|
if (!numPoints || itemPtr->state==TK_STATE_HIDDEN) { |
| 1363 |
|
return bestDist; |
| 1364 |
|
} else if (numPoints == 1) { |
| 1365 |
|
bestDist = hypot(linePoints[0] - pointPtr[0], linePoints[1] - pointPtr[1]) |
| 1366 |
|
- width/2.0; |
| 1367 |
|
if (bestDist < 0) bestDist = 0; |
| 1368 |
|
return bestDist; |
| 1369 |
|
} |
| 1370 |
|
|
| 1371 |
|
/* |
| 1372 |
|
* The overall idea is to iterate through all of the edges of |
| 1373 |
|
* the line, computing a polygon for each edge and testing the |
| 1374 |
|
* point against that polygon. In addition, there are additional |
| 1375 |
|
* tests to deal with rounded joints and caps. |
| 1376 |
|
*/ |
| 1377 |
|
|
| 1378 |
|
changedMiterToBevel = 0; |
| 1379 |
|
for (count = numPoints, coordPtr = linePoints; count >= 2; |
| 1380 |
|
count--, coordPtr += 2) { |
| 1381 |
|
|
| 1382 |
|
/* |
| 1383 |
|
* If rounding is done around the first point then compute |
| 1384 |
|
* the distance between the point and the point. |
| 1385 |
|
*/ |
| 1386 |
|
|
| 1387 |
|
if (((linePtr->capStyle == CapRound) && (count == numPoints)) |
| 1388 |
|
|| ((linePtr->joinStyle == JoinRound) |
| 1389 |
|
&& (count != numPoints))) { |
| 1390 |
|
dist = hypot(coordPtr[0] - pointPtr[0], coordPtr[1] - pointPtr[1]) |
| 1391 |
|
- width/2.0; |
| 1392 |
|
if (dist <= 0.0) { |
| 1393 |
|
bestDist = 0.0; |
| 1394 |
|
goto done; |
| 1395 |
|
} else if (dist < bestDist) { |
| 1396 |
|
bestDist = dist; |
| 1397 |
|
} |
| 1398 |
|
} |
| 1399 |
|
|
| 1400 |
|
/* |
| 1401 |
|
* Compute the polygonal shape corresponding to this edge, |
| 1402 |
|
* consisting of two points for the first point of the edge |
| 1403 |
|
* and two points for the last point of the edge. |
| 1404 |
|
*/ |
| 1405 |
|
|
| 1406 |
|
if (count == numPoints) { |
| 1407 |
|
TkGetButtPoints(coordPtr+2, coordPtr, width, |
| 1408 |
|
linePtr->capStyle == CapProjecting, poly, poly+2); |
| 1409 |
|
} else if ((linePtr->joinStyle == JoinMiter) && !changedMiterToBevel) { |
| 1410 |
|
poly[0] = poly[6]; |
| 1411 |
|
poly[1] = poly[7]; |
| 1412 |
|
poly[2] = poly[4]; |
| 1413 |
|
poly[3] = poly[5]; |
| 1414 |
|
} else { |
| 1415 |
|
TkGetButtPoints(coordPtr+2, coordPtr, width, 0, |
| 1416 |
|
poly, poly+2); |
| 1417 |
|
|
| 1418 |
|
/* |
| 1419 |
|
* If this line uses beveled joints, then check the distance |
| 1420 |
|
* to a polygon comprising the last two points of the previous |
| 1421 |
|
* polygon and the first two from this polygon; this checks |
| 1422 |
|
* the wedges that fill the mitered joint. |
| 1423 |
|
*/ |
| 1424 |
|
|
| 1425 |
|
if ((linePtr->joinStyle == JoinBevel) || changedMiterToBevel) { |
| 1426 |
|
poly[8] = poly[0]; |
| 1427 |
|
poly[9] = poly[1]; |
| 1428 |
|
dist = TkPolygonToPoint(poly, 5, pointPtr); |
| 1429 |
|
if (dist <= 0.0) { |
| 1430 |
|
bestDist = 0.0; |
| 1431 |
|
goto done; |
| 1432 |
|
} else if (dist < bestDist) { |
| 1433 |
|
bestDist = dist; |
| 1434 |
|
} |
| 1435 |
|
changedMiterToBevel = 0; |
| 1436 |
|
} |
| 1437 |
|
} |
| 1438 |
|
if (count == 2) { |
| 1439 |
|
TkGetButtPoints(coordPtr, coordPtr+2, width, |
| 1440 |
|
linePtr->capStyle == CapProjecting, poly+4, poly+6); |
| 1441 |
|
} else if (linePtr->joinStyle == JoinMiter) { |
| 1442 |
|
if (TkGetMiterPoints(coordPtr, coordPtr+2, coordPtr+4, |
| 1443 |
|
width, poly+4, poly+6) == 0) { |
| 1444 |
|
changedMiterToBevel = 1; |
| 1445 |
|
TkGetButtPoints(coordPtr, coordPtr+2, width, |
| 1446 |
|
0, poly+4, poly+6); |
| 1447 |
|
} |
| 1448 |
|
} else { |
| 1449 |
|
TkGetButtPoints(coordPtr, coordPtr+2, width, 0, |
| 1450 |
|
poly+4, poly+6); |
| 1451 |
|
} |
| 1452 |
|
poly[8] = poly[0]; |
| 1453 |
|
poly[9] = poly[1]; |
| 1454 |
|
dist = TkPolygonToPoint(poly, 5, pointPtr); |
| 1455 |
|
if (dist <= 0.0) { |
| 1456 |
|
bestDist = 0.0; |
| 1457 |
|
goto done; |
| 1458 |
|
} else if (dist < bestDist) { |
| 1459 |
|
bestDist = dist; |
| 1460 |
|
} |
| 1461 |
|
} |
| 1462 |
|
|
| 1463 |
|
/* |
| 1464 |
|
* If caps are rounded, check the distance to the cap around the |
| 1465 |
|
* final end point of the line. |
| 1466 |
|
*/ |
| 1467 |
|
|
| 1468 |
|
if (linePtr->capStyle == CapRound) { |
| 1469 |
|
dist = hypot(coordPtr[0] - pointPtr[0], coordPtr[1] - pointPtr[1]) |
| 1470 |
|
- width/2.0; |
| 1471 |
|
if (dist <= 0.0) { |
| 1472 |
|
bestDist = 0.0; |
| 1473 |
|
goto done; |
| 1474 |
|
} else if (dist < bestDist) { |
| 1475 |
|
bestDist = dist; |
| 1476 |
|
} |
| 1477 |
|
} |
| 1478 |
|
|
| 1479 |
|
/* |
| 1480 |
|
* If there are arrowheads, check the distance to the arrowheads. |
| 1481 |
|
*/ |
| 1482 |
|
|
| 1483 |
|
if (linePtr->arrow != ARROWS_NONE) { |
| 1484 |
|
if (linePtr->arrow != ARROWS_LAST) { |
| 1485 |
|
dist = TkPolygonToPoint(linePtr->firstArrowPtr, PTS_IN_ARROW, |
| 1486 |
|
pointPtr); |
| 1487 |
|
if (dist <= 0.0) { |
| 1488 |
|
bestDist = 0.0; |
| 1489 |
|
goto done; |
| 1490 |
|
} else if (dist < bestDist) { |
| 1491 |
|
bestDist = dist; |
| 1492 |
|
} |
| 1493 |
|
} |
| 1494 |
|
if (linePtr->arrow != ARROWS_FIRST) { |
| 1495 |
|
dist = TkPolygonToPoint(linePtr->lastArrowPtr, PTS_IN_ARROW, |
| 1496 |
|
pointPtr); |
| 1497 |
|
if (dist <= 0.0) { |
| 1498 |
|
bestDist = 0.0; |
| 1499 |
|
goto done; |
| 1500 |
|
} else if (dist < bestDist) { |
| 1501 |
|
bestDist = dist; |
| 1502 |
|
} |
| 1503 |
|
} |
| 1504 |
|
} |
| 1505 |
|
|
| 1506 |
|
done: |
| 1507 |
|
if ((linePoints != staticSpace) && (linePoints != linePtr->coordPtr)) { |
| 1508 |
|
ckfree((char *) linePoints); |
| 1509 |
|
} |
| 1510 |
|
return bestDist; |
| 1511 |
|
} |
| 1512 |
|
|
| 1513 |
|
/* |
| 1514 |
|
*-------------------------------------------------------------- |
| 1515 |
|
* |
| 1516 |
|
* LineToArea -- |
| 1517 |
|
* |
| 1518 |
|
* This procedure is called to determine whether an item |
| 1519 |
|
* lies entirely inside, entirely outside, or overlapping |
| 1520 |
|
* a given rectangular area. |
| 1521 |
|
* |
| 1522 |
|
* Results: |
| 1523 |
|
* -1 is returned if the item is entirely outside the |
| 1524 |
|
* area, 0 if it overlaps, and 1 if it is entirely |
| 1525 |
|
* inside the given area. |
| 1526 |
|
* |
| 1527 |
|
* Side effects: |
| 1528 |
|
* None. |
| 1529 |
|
* |
| 1530 |
|
*-------------------------------------------------------------- |
| 1531 |
|
*/ |
| 1532 |
|
|
| 1533 |
|
/* ARGSUSED */ |
| 1534 |
|
static int |
| 1535 |
|
LineToArea(canvas, itemPtr, rectPtr) |
| 1536 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
| 1537 |
|
Tk_Item *itemPtr; /* Item to check against line. */ |
| 1538 |
|
double *rectPtr; |
| 1539 |
|
{ |
| 1540 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 1541 |
|
double staticSpace[2*MAX_STATIC_POINTS]; |
| 1542 |
|
double *linePoints; |
| 1543 |
|
int numPoints, result; |
| 1544 |
|
double radius, width; |
| 1545 |
|
Tk_State state = itemPtr->state; |
| 1546 |
|
|
| 1547 |
|
if(state == TK_STATE_NULL) { |
| 1548 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 1549 |
|
} |
| 1550 |
|
width = linePtr->outline.width; |
| 1551 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
| 1552 |
|
if (linePtr->outline.activeWidth>width) { |
| 1553 |
|
width = linePtr->outline.activeWidth; |
| 1554 |
|
} |
| 1555 |
|
} else if (state==TK_STATE_DISABLED) { |
| 1556 |
|
if (linePtr->outline.disabledWidth>0) { |
| 1557 |
|
width = linePtr->outline.disabledWidth; |
| 1558 |
|
} |
| 1559 |
|
} |
| 1560 |
|
|
| 1561 |
|
radius = (width+1.0)/2.0; |
| 1562 |
|
|
| 1563 |
|
if ((state==TK_STATE_HIDDEN) || !linePtr->numPoints) { |
| 1564 |
|
return -1; |
| 1565 |
|
} else if (linePtr->numPoints == 1) { |
| 1566 |
|
double oval[4]; |
| 1567 |
|
oval[0] = linePtr->coordPtr[0]-radius; |
| 1568 |
|
oval[1] = linePtr->coordPtr[1]-radius; |
| 1569 |
|
oval[2] = linePtr->coordPtr[0]+radius; |
| 1570 |
|
oval[3] = linePtr->coordPtr[1]+radius; |
| 1571 |
|
return TkOvalToArea(oval, rectPtr); |
| 1572 |
|
} |
| 1573 |
|
|
| 1574 |
|
/* |
| 1575 |
|
* Handle smoothed lines by generating an expanded set of points |
| 1576 |
|
* against which to do the check. |
| 1577 |
|
*/ |
| 1578 |
|
|
| 1579 |
|
if ((linePtr->smooth) && (linePtr->numPoints > 2)) { |
| 1580 |
|
numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, |
| 1581 |
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
| 1582 |
|
(double *) NULL); |
| 1583 |
|
if (numPoints <= MAX_STATIC_POINTS) { |
| 1584 |
|
linePoints = staticSpace; |
| 1585 |
|
} else { |
| 1586 |
|
linePoints = (double *) ckalloc((unsigned) |
| 1587 |
|
(2*numPoints*sizeof(double))); |
| 1588 |
|
} |
| 1589 |
|
numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, |
| 1590 |
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
| 1591 |
|
linePoints); |
| 1592 |
|
} else { |
| 1593 |
|
numPoints = linePtr->numPoints; |
| 1594 |
|
linePoints = linePtr->coordPtr; |
| 1595 |
|
} |
| 1596 |
|
|
| 1597 |
|
/* |
| 1598 |
|
* Check the segments of the line. |
| 1599 |
|
*/ |
| 1600 |
|
|
| 1601 |
|
if (width < 1.0) { |
| 1602 |
|
width = 1.0; |
| 1603 |
|
} |
| 1604 |
|
|
| 1605 |
|
result = TkThickPolyLineToArea(linePoints, numPoints, |
| 1606 |
|
width, linePtr->capStyle, linePtr->joinStyle, |
| 1607 |
|
rectPtr); |
| 1608 |
|
if (result == 0) { |
| 1609 |
|
goto done; |
| 1610 |
|
} |
| 1611 |
|
|
| 1612 |
|
/* |
| 1613 |
|
* Check arrowheads, if any. |
| 1614 |
|
*/ |
| 1615 |
|
|
| 1616 |
|
if (linePtr->arrow != ARROWS_NONE) { |
| 1617 |
|
if (linePtr->arrow != ARROWS_LAST) { |
| 1618 |
|
if (TkPolygonToArea(linePtr->firstArrowPtr, PTS_IN_ARROW, |
| 1619 |
|
rectPtr) != result) { |
| 1620 |
|
result = 0; |
| 1621 |
|
goto done; |
| 1622 |
|
} |
| 1623 |
|
} |
| 1624 |
|
if (linePtr->arrow != ARROWS_FIRST) { |
| 1625 |
|
if (TkPolygonToArea(linePtr->lastArrowPtr, PTS_IN_ARROW, |
| 1626 |
|
rectPtr) != result) { |
| 1627 |
|
result = 0; |
| 1628 |
|
goto done; |
| 1629 |
|
} |
| 1630 |
|
} |
| 1631 |
|
} |
| 1632 |
|
|
| 1633 |
|
done: |
| 1634 |
|
if ((linePoints != staticSpace) && (linePoints != linePtr->coordPtr)) { |
| 1635 |
|
ckfree((char *) linePoints); |
| 1636 |
|
} |
| 1637 |
|
return result; |
| 1638 |
|
} |
| 1639 |
|
|
| 1640 |
|
/* |
| 1641 |
|
*-------------------------------------------------------------- |
| 1642 |
|
* |
| 1643 |
|
* ScaleLine -- |
| 1644 |
|
* |
| 1645 |
|
* This procedure is invoked to rescale a line item. |
| 1646 |
|
* |
| 1647 |
|
* Results: |
| 1648 |
|
* None. |
| 1649 |
|
* |
| 1650 |
|
* Side effects: |
| 1651 |
|
* The line referred to by itemPtr is rescaled so that the |
| 1652 |
|
* following transformation is applied to all point |
| 1653 |
|
* coordinates: |
| 1654 |
|
* x' = originX + scaleX*(x-originX) |
| 1655 |
|
* y' = originY + scaleY*(y-originY) |
| 1656 |
|
* |
| 1657 |
|
*-------------------------------------------------------------- |
| 1658 |
|
*/ |
| 1659 |
|
|
| 1660 |
|
static void |
| 1661 |
|
ScaleLine(canvas, itemPtr, originX, originY, scaleX, scaleY) |
| 1662 |
|
Tk_Canvas canvas; /* Canvas containing line. */ |
| 1663 |
|
Tk_Item *itemPtr; /* Line to be scaled. */ |
| 1664 |
|
double originX, originY; /* Origin about which to scale rect. */ |
| 1665 |
|
double scaleX; /* Amount to scale in X direction. */ |
| 1666 |
|
double scaleY; /* Amount to scale in Y direction. */ |
| 1667 |
|
{ |
| 1668 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 1669 |
|
double *coordPtr; |
| 1670 |
|
int i; |
| 1671 |
|
|
| 1672 |
|
/* |
| 1673 |
|
* Delete any arrowheads before scaling all the points (so that |
| 1674 |
|
* the end-points of the line get restored). |
| 1675 |
|
*/ |
| 1676 |
|
|
| 1677 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 1678 |
|
linePtr->coordPtr[0] = linePtr->firstArrowPtr[0]; |
| 1679 |
|
linePtr->coordPtr[1] = linePtr->firstArrowPtr[1]; |
| 1680 |
|
ckfree((char *) linePtr->firstArrowPtr); |
| 1681 |
|
linePtr->firstArrowPtr = NULL; |
| 1682 |
|
} |
| 1683 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 1684 |
|
int i; |
| 1685 |
|
|
| 1686 |
|
i = 2*(linePtr->numPoints-1); |
| 1687 |
|
linePtr->coordPtr[i] = linePtr->lastArrowPtr[0]; |
| 1688 |
|
linePtr->coordPtr[i+1] = linePtr->lastArrowPtr[1]; |
| 1689 |
|
ckfree((char *) linePtr->lastArrowPtr); |
| 1690 |
|
linePtr->lastArrowPtr = NULL; |
| 1691 |
|
} |
| 1692 |
|
for (i = 0, coordPtr = linePtr->coordPtr; i < linePtr->numPoints; |
| 1693 |
|
i++, coordPtr += 2) { |
| 1694 |
|
coordPtr[0] = originX + scaleX*(*coordPtr - originX); |
| 1695 |
|
coordPtr[1] = originY + scaleY*(coordPtr[1] - originY); |
| 1696 |
|
} |
| 1697 |
|
if (linePtr->arrow != ARROWS_NONE) { |
| 1698 |
|
ConfigureArrows(canvas, linePtr); |
| 1699 |
|
} |
| 1700 |
|
ComputeLineBbox(canvas, linePtr); |
| 1701 |
|
} |
| 1702 |
|
|
| 1703 |
|
/* |
| 1704 |
|
*-------------------------------------------------------------- |
| 1705 |
|
* |
| 1706 |
|
* GetLineIndex -- |
| 1707 |
|
* |
| 1708 |
|
* Parse an index into a line item and return either its value |
| 1709 |
|
* or an error. |
| 1710 |
|
* |
| 1711 |
|
* Results: |
| 1712 |
|
* A standard Tcl result. If all went well, then *indexPtr is |
| 1713 |
|
* filled in with the index (into itemPtr) corresponding to |
| 1714 |
|
* string. Otherwise an error message is left in |
| 1715 |
|
* interp->result. |
| 1716 |
|
* |
| 1717 |
|
* Side effects: |
| 1718 |
|
* None. |
| 1719 |
|
* |
| 1720 |
|
*-------------------------------------------------------------- |
| 1721 |
|
*/ |
| 1722 |
|
|
| 1723 |
|
static int |
| 1724 |
|
GetLineIndex(interp, canvas, itemPtr, obj, indexPtr) |
| 1725 |
|
Tcl_Interp *interp; /* Used for error reporting. */ |
| 1726 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
| 1727 |
|
Tk_Item *itemPtr; /* Item for which the index is being |
| 1728 |
|
* specified. */ |
| 1729 |
|
Tcl_Obj *obj; /* Specification of a particular coord |
| 1730 |
|
* in itemPtr's line. */ |
| 1731 |
|
int *indexPtr; /* Where to store converted index. */ |
| 1732 |
|
{ |
| 1733 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 1734 |
|
size_t length; |
| 1735 |
|
char *string = Tcl_GetStringFromObj(obj, (int *) &length); |
| 1736 |
|
|
| 1737 |
|
if (string[0] == 'e') { |
| 1738 |
|
if (strncmp(string, "end", length) == 0) { |
| 1739 |
|
*indexPtr = 2*linePtr->numPoints; |
| 1740 |
|
} else { |
| 1741 |
|
badIndex: |
| 1742 |
|
|
| 1743 |
|
/* |
| 1744 |
|
* Some of the paths here leave messages in interp->result, |
| 1745 |
|
* so we have to clear it out before storing our own message. |
| 1746 |
|
*/ |
| 1747 |
|
|
| 1748 |
|
Tcl_SetResult(interp, (char *) NULL, TCL_STATIC); |
| 1749 |
|
Tcl_AppendResult(interp, "bad index \"", string, "\"", |
| 1750 |
|
(char *) NULL); |
| 1751 |
|
return TCL_ERROR; |
| 1752 |
|
} |
| 1753 |
|
} else if (string[0] == '@') { |
| 1754 |
|
int i; |
| 1755 |
|
double x ,y, bestDist, dist, *coordPtr; |
| 1756 |
|
char *end, *p; |
| 1757 |
|
|
| 1758 |
|
p = string+1; |
| 1759 |
|
x = strtod(p, &end); |
| 1760 |
|
if ((end == p) || (*end != ',')) { |
| 1761 |
|
goto badIndex; |
| 1762 |
|
} |
| 1763 |
|
p = end+1; |
| 1764 |
|
y = strtod(p, &end); |
| 1765 |
|
if ((end == p) || (*end != 0)) { |
| 1766 |
|
goto badIndex; |
| 1767 |
|
} |
| 1768 |
|
bestDist = 1.0e36; |
| 1769 |
|
coordPtr = linePtr->coordPtr; |
| 1770 |
|
*indexPtr = 0; |
| 1771 |
|
for(i=0; i<linePtr->numPoints; i++) { |
| 1772 |
|
dist = hypot(coordPtr[0] - x, coordPtr[1] - y); |
| 1773 |
|
if (dist<bestDist) { |
| 1774 |
|
bestDist = dist; |
| 1775 |
|
*indexPtr = 2*i; |
| 1776 |
|
} |
| 1777 |
|
coordPtr += 2; |
| 1778 |
|
} |
| 1779 |
|
} else { |
| 1780 |
|
if (Tcl_GetIntFromObj(interp, obj, indexPtr) != TCL_OK) { |
| 1781 |
|
goto badIndex; |
| 1782 |
|
} |
| 1783 |
|
*indexPtr &= -2; /* if index is odd, make it even */ |
| 1784 |
|
if (*indexPtr < 0){ |
| 1785 |
|
*indexPtr = 0; |
| 1786 |
|
} else if (*indexPtr > (2*linePtr->numPoints)) { |
| 1787 |
|
*indexPtr = (2*linePtr->numPoints); |
| 1788 |
|
} |
| 1789 |
|
} |
| 1790 |
|
return TCL_OK; |
| 1791 |
|
} |
| 1792 |
|
|
| 1793 |
|
/* |
| 1794 |
|
*-------------------------------------------------------------- |
| 1795 |
|
* |
| 1796 |
|
* TranslateLine -- |
| 1797 |
|
* |
| 1798 |
|
* This procedure is called to move a line by a given amount. |
| 1799 |
|
* |
| 1800 |
|
* Results: |
| 1801 |
|
* None. |
| 1802 |
|
* |
| 1803 |
|
* Side effects: |
| 1804 |
|
* The position of the line is offset by (xDelta, yDelta), and |
| 1805 |
|
* the bounding box is updated in the generic part of the item |
| 1806 |
|
* structure. |
| 1807 |
|
* |
| 1808 |
|
*-------------------------------------------------------------- |
| 1809 |
|
*/ |
| 1810 |
|
|
| 1811 |
|
static void |
| 1812 |
|
TranslateLine(canvas, itemPtr, deltaX, deltaY) |
| 1813 |
|
Tk_Canvas canvas; /* Canvas containing item. */ |
| 1814 |
|
Tk_Item *itemPtr; /* Item that is being moved. */ |
| 1815 |
|
double deltaX, deltaY; /* Amount by which item is to be |
| 1816 |
|
* moved. */ |
| 1817 |
|
{ |
| 1818 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 1819 |
|
double *coordPtr; |
| 1820 |
|
int i; |
| 1821 |
|
|
| 1822 |
|
for (i = 0, coordPtr = linePtr->coordPtr; i < linePtr->numPoints; |
| 1823 |
|
i++, coordPtr += 2) { |
| 1824 |
|
coordPtr[0] += deltaX; |
| 1825 |
|
coordPtr[1] += deltaY; |
| 1826 |
|
} |
| 1827 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 1828 |
|
for (i = 0, coordPtr = linePtr->firstArrowPtr; i < PTS_IN_ARROW; |
| 1829 |
|
i++, coordPtr += 2) { |
| 1830 |
|
coordPtr[0] += deltaX; |
| 1831 |
|
coordPtr[1] += deltaY; |
| 1832 |
|
} |
| 1833 |
|
} |
| 1834 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 1835 |
|
for (i = 0, coordPtr = linePtr->lastArrowPtr; i < PTS_IN_ARROW; |
| 1836 |
|
i++, coordPtr += 2) { |
| 1837 |
|
coordPtr[0] += deltaX; |
| 1838 |
|
coordPtr[1] += deltaY; |
| 1839 |
|
} |
| 1840 |
|
} |
| 1841 |
|
ComputeLineBbox(canvas, linePtr); |
| 1842 |
|
} |
| 1843 |
|
|
| 1844 |
|
/* |
| 1845 |
|
*-------------------------------------------------------------- |
| 1846 |
|
* |
| 1847 |
|
* ParseArrowShape -- |
| 1848 |
|
* |
| 1849 |
|
* This procedure is called back during option parsing to |
| 1850 |
|
* parse arrow shape information. |
| 1851 |
|
* |
| 1852 |
|
* Results: |
| 1853 |
|
* The return value is a standard Tcl result: TCL_OK means |
| 1854 |
|
* that the arrow shape information was parsed ok, and |
| 1855 |
|
* TCL_ERROR means it couldn't be parsed. |
| 1856 |
|
* |
| 1857 |
|
* Side effects: |
| 1858 |
|
* Arrow information in recordPtr is updated. |
| 1859 |
|
* |
| 1860 |
|
*-------------------------------------------------------------- |
| 1861 |
|
*/ |
| 1862 |
|
|
| 1863 |
|
/* ARGSUSED */ |
| 1864 |
|
static int |
| 1865 |
|
ParseArrowShape(clientData, interp, tkwin, value, recordPtr, offset) |
| 1866 |
|
ClientData clientData; /* Not used. */ |
| 1867 |
|
Tcl_Interp *interp; /* Used for error reporting. */ |
| 1868 |
|
Tk_Window tkwin; /* Not used. */ |
| 1869 |
|
CONST char *value; /* Textual specification of arrow shape. */ |
| 1870 |
|
char *recordPtr; /* Pointer to item record in which to |
| 1871 |
|
* store arrow information. */ |
| 1872 |
|
int offset; /* Offset of shape information in widget |
| 1873 |
|
* record. */ |
| 1874 |
|
{ |
| 1875 |
|
LineItem *linePtr = (LineItem *) recordPtr; |
| 1876 |
|
double a, b, c; |
| 1877 |
|
int argc; |
| 1878 |
|
char **argv = NULL; |
| 1879 |
|
|
| 1880 |
|
if (offset != Tk_Offset(LineItem, arrowShapeA)) { |
| 1881 |
|
panic("ParseArrowShape received bogus offset"); |
| 1882 |
|
} |
| 1883 |
|
|
| 1884 |
|
if (Tcl_SplitList(interp, (char *) value, &argc, &argv) != TCL_OK) { |
| 1885 |
|
syntaxError: |
| 1886 |
|
Tcl_ResetResult(interp); |
| 1887 |
|
Tcl_AppendResult(interp, "bad arrow shape \"", value, |
| 1888 |
|
"\": must be list with three numbers", (char *) NULL); |
| 1889 |
|
if (argv != NULL) { |
| 1890 |
|
ckfree((char *) argv); |
| 1891 |
|
} |
| 1892 |
|
return TCL_ERROR; |
| 1893 |
|
} |
| 1894 |
|
if (argc != 3) { |
| 1895 |
|
goto syntaxError; |
| 1896 |
|
} |
| 1897 |
|
if ((Tk_CanvasGetCoord(interp, linePtr->canvas, argv[0], &a) != TCL_OK) |
| 1898 |
|
|| (Tk_CanvasGetCoord(interp, linePtr->canvas, argv[1], &b) |
| 1899 |
|
!= TCL_OK) |
| 1900 |
|
|| (Tk_CanvasGetCoord(interp, linePtr->canvas, argv[2], &c) |
| 1901 |
|
!= TCL_OK)) { |
| 1902 |
|
goto syntaxError; |
| 1903 |
|
} |
| 1904 |
|
linePtr->arrowShapeA = (float)a; |
| 1905 |
|
linePtr->arrowShapeB = (float)b; |
| 1906 |
|
linePtr->arrowShapeC = (float)c; |
| 1907 |
|
ckfree((char *) argv); |
| 1908 |
|
return TCL_OK; |
| 1909 |
|
} |
| 1910 |
|
|
| 1911 |
|
/* |
| 1912 |
|
*-------------------------------------------------------------- |
| 1913 |
|
* |
| 1914 |
|
* PrintArrowShape -- |
| 1915 |
|
* |
| 1916 |
|
* This procedure is a callback invoked by the configuration |
| 1917 |
|
* code to return a printable value describing an arrow shape. |
| 1918 |
|
* |
| 1919 |
|
* Results: |
| 1920 |
|
* None. |
| 1921 |
|
* |
| 1922 |
|
* Side effects: |
| 1923 |
|
* None. |
| 1924 |
|
* |
| 1925 |
|
*-------------------------------------------------------------- |
| 1926 |
|
*/ |
| 1927 |
|
|
| 1928 |
|
/* ARGSUSED */ |
| 1929 |
|
static char * |
| 1930 |
|
PrintArrowShape(clientData, tkwin, recordPtr, offset, freeProcPtr) |
| 1931 |
|
ClientData clientData; /* Not used. */ |
| 1932 |
|
Tk_Window tkwin; /* Window associated with linePtr's widget. */ |
| 1933 |
|
char *recordPtr; /* Pointer to item record containing current |
| 1934 |
|
* shape information. */ |
| 1935 |
|
int offset; /* Offset of arrow information in record. */ |
| 1936 |
|
Tcl_FreeProc **freeProcPtr; /* Store address of procedure to call to |
| 1937 |
|
* free string here. */ |
| 1938 |
|
{ |
| 1939 |
|
LineItem *linePtr = (LineItem *) recordPtr; |
| 1940 |
|
char *buffer; |
| 1941 |
|
|
| 1942 |
|
buffer = (char *) ckalloc(120); |
| 1943 |
|
sprintf(buffer, "%.5g %.5g %.5g", linePtr->arrowShapeA, |
| 1944 |
|
linePtr->arrowShapeB, linePtr->arrowShapeC); |
| 1945 |
|
*freeProcPtr = TCL_DYNAMIC; |
| 1946 |
|
return buffer; |
| 1947 |
|
} |
| 1948 |
|
|
| 1949 |
|
|
| 1950 |
|
/* |
| 1951 |
|
*-------------------------------------------------------------- |
| 1952 |
|
* |
| 1953 |
|
* ArrowParseProc -- |
| 1954 |
|
* |
| 1955 |
|
* This procedure is invoked during option processing to handle |
| 1956 |
|
* the "-arrow" option. |
| 1957 |
|
* |
| 1958 |
|
* Results: |
| 1959 |
|
* A standard Tcl return value. |
| 1960 |
|
* |
| 1961 |
|
* Side effects: |
| 1962 |
|
* The arrow for a given item gets replaced by the arrow |
| 1963 |
|
* indicated in the value argument. |
| 1964 |
|
* |
| 1965 |
|
*-------------------------------------------------------------- |
| 1966 |
|
*/ |
| 1967 |
|
|
| 1968 |
|
static int |
| 1969 |
|
ArrowParseProc(clientData, interp, tkwin, value, widgRec, offset) |
| 1970 |
|
ClientData clientData; /* some flags.*/ |
| 1971 |
|
Tcl_Interp *interp; /* Used for reporting errors. */ |
| 1972 |
|
Tk_Window tkwin; /* Window containing canvas widget. */ |
| 1973 |
|
CONST char *value; /* Value of option. */ |
| 1974 |
|
char *widgRec; /* Pointer to record for item. */ |
| 1975 |
|
int offset; /* Offset into item. */ |
| 1976 |
|
{ |
| 1977 |
|
int c; |
| 1978 |
|
size_t length; |
| 1979 |
|
|
| 1980 |
|
register Arrows *arrowPtr = (Arrows *) (widgRec + offset); |
| 1981 |
|
|
| 1982 |
|
if(value == NULL || *value == 0) { |
| 1983 |
|
*arrowPtr = ARROWS_NONE; |
| 1984 |
|
return TCL_OK; |
| 1985 |
|
} |
| 1986 |
|
|
| 1987 |
|
c = value[0]; |
| 1988 |
|
length = strlen(value); |
| 1989 |
|
|
| 1990 |
|
if ((c == 'n') && (strncmp(value, "none", length) == 0)) { |
| 1991 |
|
*arrowPtr = ARROWS_NONE; |
| 1992 |
|
return TCL_OK; |
| 1993 |
|
} |
| 1994 |
|
if ((c == 'f') && (strncmp(value, "first", length) == 0)) { |
| 1995 |
|
*arrowPtr = ARROWS_FIRST; |
| 1996 |
|
return TCL_OK; |
| 1997 |
|
} |
| 1998 |
|
if ((c == 'l') && (strncmp(value, "last", length) == 0)) { |
| 1999 |
|
*arrowPtr = ARROWS_LAST; |
| 2000 |
|
return TCL_OK; |
| 2001 |
|
} |
| 2002 |
|
if ((c == 'b') && (strncmp(value, "both", length) == 0)) { |
| 2003 |
|
*arrowPtr = ARROWS_BOTH; |
| 2004 |
|
return TCL_OK; |
| 2005 |
|
} |
| 2006 |
|
|
| 2007 |
|
Tcl_AppendResult(interp, "bad arrow spec \"", value, |
| 2008 |
|
"\": must be none, first, last, or both", |
| 2009 |
|
(char *) NULL); |
| 2010 |
|
*arrowPtr = ARROWS_NONE; |
| 2011 |
|
return TCL_ERROR; |
| 2012 |
|
} |
| 2013 |
|
|
| 2014 |
|
/* |
| 2015 |
|
*-------------------------------------------------------------- |
| 2016 |
|
* |
| 2017 |
|
* ArrowPrintProc -- |
| 2018 |
|
* |
| 2019 |
|
* This procedure is invoked by the Tk configuration code |
| 2020 |
|
* to produce a printable string for the "-arrow" |
| 2021 |
|
* configuration option. |
| 2022 |
|
* |
| 2023 |
|
* Results: |
| 2024 |
|
* The return value is a string describing the arrows for |
| 2025 |
|
* the item referred to by "widgRec". In addition, *freeProcPtr |
| 2026 |
|
* is filled in with the address of a procedure to call to free |
| 2027 |
|
* the result string when it's no longer needed (or NULL to |
| 2028 |
|
* indicate that the string doesn't need to be freed). |
| 2029 |
|
* |
| 2030 |
|
* Side effects: |
| 2031 |
|
* None. |
| 2032 |
|
* |
| 2033 |
|
*-------------------------------------------------------------- |
| 2034 |
|
*/ |
| 2035 |
|
|
| 2036 |
|
static char * |
| 2037 |
|
ArrowPrintProc(clientData, tkwin, widgRec, offset, freeProcPtr) |
| 2038 |
|
ClientData clientData; /* Ignored. */ |
| 2039 |
|
Tk_Window tkwin; /* Window containing canvas widget. */ |
| 2040 |
|
char *widgRec; /* Pointer to record for item. */ |
| 2041 |
|
int offset; /* Offset into item. */ |
| 2042 |
|
Tcl_FreeProc **freeProcPtr; /* Pointer to variable to fill in with |
| 2043 |
|
* information about how to reclaim |
| 2044 |
|
* storage for return string. */ |
| 2045 |
|
{ |
| 2046 |
|
register Arrows *arrowPtr = (Arrows *) (widgRec + offset); |
| 2047 |
|
|
| 2048 |
|
switch (*arrowPtr) { |
| 2049 |
|
case ARROWS_FIRST: |
| 2050 |
|
return "first"; |
| 2051 |
|
case ARROWS_LAST: |
| 2052 |
|
return "last"; |
| 2053 |
|
case ARROWS_BOTH: |
| 2054 |
|
return "both"; |
| 2055 |
|
default: |
| 2056 |
|
return "none"; |
| 2057 |
|
} |
| 2058 |
|
} |
| 2059 |
|
|
| 2060 |
|
/* |
| 2061 |
|
*-------------------------------------------------------------- |
| 2062 |
|
* |
| 2063 |
|
* ConfigureArrows -- |
| 2064 |
|
* |
| 2065 |
|
* If arrowheads have been requested for a line, this |
| 2066 |
|
* procedure makes arrangements for the arrowheads. |
| 2067 |
|
* |
| 2068 |
|
* Results: |
| 2069 |
|
* Always returns TCL_OK. |
| 2070 |
|
* |
| 2071 |
|
* Side effects: |
| 2072 |
|
* Information in linePtr is set up for one or two arrowheads. |
| 2073 |
|
* the firstArrowPtr and lastArrowPtr polygons are allocated |
| 2074 |
|
* and initialized, if need be, and the end points of the line |
| 2075 |
|
* are adjusted so that a thick line doesn't stick out past |
| 2076 |
|
* the arrowheads. |
| 2077 |
|
* |
| 2078 |
|
*-------------------------------------------------------------- |
| 2079 |
|
*/ |
| 2080 |
|
|
| 2081 |
|
/* ARGSUSED */ |
| 2082 |
|
static int |
| 2083 |
|
ConfigureArrows(canvas, linePtr) |
| 2084 |
|
Tk_Canvas canvas; /* Canvas in which arrows will be |
| 2085 |
|
* displayed (interp and tkwin |
| 2086 |
|
* fields are needed). */ |
| 2087 |
|
LineItem *linePtr; /* Item to configure for arrows. */ |
| 2088 |
|
{ |
| 2089 |
|
double *poly, *coordPtr; |
| 2090 |
|
double dx, dy, length, sinTheta, cosTheta, temp; |
| 2091 |
|
double fracHeight; /* Line width as fraction of |
| 2092 |
|
* arrowhead width. */ |
| 2093 |
|
double backup; /* Distance to backup end points |
| 2094 |
|
* so the line ends in the middle |
| 2095 |
|
* of the arrowhead. */ |
| 2096 |
|
double vertX, vertY; /* Position of arrowhead vertex. */ |
| 2097 |
|
double shapeA, shapeB, shapeC; /* Adjusted coordinates (see |
| 2098 |
|
* explanation below). */ |
| 2099 |
|
double width; |
| 2100 |
|
Tk_State state = linePtr->header.state; |
| 2101 |
|
|
| 2102 |
|
if (linePtr->numPoints <2) { |
| 2103 |
|
return TCL_OK; |
| 2104 |
|
} |
| 2105 |
|
|
| 2106 |
|
if(state == TK_STATE_NULL) { |
| 2107 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 2108 |
|
} |
| 2109 |
|
|
| 2110 |
|
width = linePtr->outline.width; |
| 2111 |
|
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)linePtr) { |
| 2112 |
|
if (linePtr->outline.activeWidth>width) { |
| 2113 |
|
width = linePtr->outline.activeWidth; |
| 2114 |
|
} |
| 2115 |
|
} else if (state==TK_STATE_DISABLED) { |
| 2116 |
|
if (linePtr->outline.disabledWidth>0) { |
| 2117 |
|
width = linePtr->outline.disabledWidth; |
| 2118 |
|
} |
| 2119 |
|
} |
| 2120 |
|
|
| 2121 |
|
/* |
| 2122 |
|
* The code below makes a tiny increase in the shape parameters |
| 2123 |
|
* for the line. This is a bit of a hack, but it seems to result |
| 2124 |
|
* in displays that more closely approximate the specified parameters. |
| 2125 |
|
* Without the adjustment, the arrows come out smaller than expected. |
| 2126 |
|
*/ |
| 2127 |
|
|
| 2128 |
|
shapeA = linePtr->arrowShapeA + 0.001; |
| 2129 |
|
shapeB = linePtr->arrowShapeB + 0.001; |
| 2130 |
|
shapeC = linePtr->arrowShapeC + width/2.0 + 0.001; |
| 2131 |
|
|
| 2132 |
|
/* |
| 2133 |
|
* If there's an arrowhead on the first point of the line, compute |
| 2134 |
|
* its polygon and adjust the first point of the line so that the |
| 2135 |
|
* line doesn't stick out past the leading edge of the arrowhead. |
| 2136 |
|
*/ |
| 2137 |
|
|
| 2138 |
|
fracHeight = (width/2.0)/shapeC; |
| 2139 |
|
backup = fracHeight*shapeB + shapeA*(1.0 - fracHeight)/2.0; |
| 2140 |
|
if (linePtr->arrow != ARROWS_LAST) { |
| 2141 |
|
poly = linePtr->firstArrowPtr; |
| 2142 |
|
if (poly == NULL) { |
| 2143 |
|
poly = (double *) ckalloc((unsigned) |
| 2144 |
|
(2*PTS_IN_ARROW*sizeof(double))); |
| 2145 |
|
poly[0] = poly[10] = linePtr->coordPtr[0]; |
| 2146 |
|
poly[1] = poly[11] = linePtr->coordPtr[1]; |
| 2147 |
|
linePtr->firstArrowPtr = poly; |
| 2148 |
|
} |
| 2149 |
|
dx = poly[0] - linePtr->coordPtr[2]; |
| 2150 |
|
dy = poly[1] - linePtr->coordPtr[3]; |
| 2151 |
|
length = hypot(dx, dy); |
| 2152 |
|
if (length == 0) { |
| 2153 |
|
sinTheta = cosTheta = 0.0; |
| 2154 |
|
} else { |
| 2155 |
|
sinTheta = dy/length; |
| 2156 |
|
cosTheta = dx/length; |
| 2157 |
|
} |
| 2158 |
|
vertX = poly[0] - shapeA*cosTheta; |
| 2159 |
|
vertY = poly[1] - shapeA*sinTheta; |
| 2160 |
|
temp = shapeC*sinTheta; |
| 2161 |
|
poly[2] = poly[0] - shapeB*cosTheta + temp; |
| 2162 |
|
poly[8] = poly[2] - 2*temp; |
| 2163 |
|
temp = shapeC*cosTheta; |
| 2164 |
|
poly[3] = poly[1] - shapeB*sinTheta - temp; |
| 2165 |
|
poly[9] = poly[3] + 2*temp; |
| 2166 |
|
poly[4] = poly[2]*fracHeight + vertX*(1.0-fracHeight); |
| 2167 |
|
poly[5] = poly[3]*fracHeight + vertY*(1.0-fracHeight); |
| 2168 |
|
poly[6] = poly[8]*fracHeight + vertX*(1.0-fracHeight); |
| 2169 |
|
poly[7] = poly[9]*fracHeight + vertY*(1.0-fracHeight); |
| 2170 |
|
|
| 2171 |
|
/* |
| 2172 |
|
* Polygon done. Now move the first point towards the second so |
| 2173 |
|
* that the corners at the end of the line are inside the |
| 2174 |
|
* arrowhead. |
| 2175 |
|
*/ |
| 2176 |
|
|
| 2177 |
|
linePtr->coordPtr[0] = poly[0] - backup*cosTheta; |
| 2178 |
|
linePtr->coordPtr[1] = poly[1] - backup*sinTheta; |
| 2179 |
|
} |
| 2180 |
|
|
| 2181 |
|
/* |
| 2182 |
|
* Similar arrowhead calculation for the last point of the line. |
| 2183 |
|
*/ |
| 2184 |
|
|
| 2185 |
|
if (linePtr->arrow != ARROWS_FIRST) { |
| 2186 |
|
coordPtr = linePtr->coordPtr + 2*(linePtr->numPoints-2); |
| 2187 |
|
poly = linePtr->lastArrowPtr; |
| 2188 |
|
if (poly == NULL) { |
| 2189 |
|
poly = (double *) ckalloc((unsigned) |
| 2190 |
|
(2*PTS_IN_ARROW*sizeof(double))); |
| 2191 |
|
poly[0] = poly[10] = coordPtr[2]; |
| 2192 |
|
poly[1] = poly[11] = coordPtr[3]; |
| 2193 |
|
linePtr->lastArrowPtr = poly; |
| 2194 |
|
} |
| 2195 |
|
dx = poly[0] - coordPtr[0]; |
| 2196 |
|
dy = poly[1] - coordPtr[1]; |
| 2197 |
|
length = hypot(dx, dy); |
| 2198 |
|
if (length == 0) { |
| 2199 |
|
sinTheta = cosTheta = 0.0; |
| 2200 |
|
} else { |
| 2201 |
|
sinTheta = dy/length; |
| 2202 |
|
cosTheta = dx/length; |
| 2203 |
|
} |
| 2204 |
|
vertX = poly[0] - shapeA*cosTheta; |
| 2205 |
|
vertY = poly[1] - shapeA*sinTheta; |
| 2206 |
|
temp = shapeC*sinTheta; |
| 2207 |
|
poly[2] = poly[0] - shapeB*cosTheta + temp; |
| 2208 |
|
poly[8] = poly[2] - 2*temp; |
| 2209 |
|
temp = shapeC*cosTheta; |
| 2210 |
|
poly[3] = poly[1] - shapeB*sinTheta - temp; |
| 2211 |
|
poly[9] = poly[3] + 2*temp; |
| 2212 |
|
poly[4] = poly[2]*fracHeight + vertX*(1.0-fracHeight); |
| 2213 |
|
poly[5] = poly[3]*fracHeight + vertY*(1.0-fracHeight); |
| 2214 |
|
poly[6] = poly[8]*fracHeight + vertX*(1.0-fracHeight); |
| 2215 |
|
poly[7] = poly[9]*fracHeight + vertY*(1.0-fracHeight); |
| 2216 |
|
coordPtr[2] = poly[0] - backup*cosTheta; |
| 2217 |
|
coordPtr[3] = poly[1] - backup*sinTheta; |
| 2218 |
|
} |
| 2219 |
|
|
| 2220 |
|
return TCL_OK; |
| 2221 |
|
} |
| 2222 |
|
|
| 2223 |
|
/* |
| 2224 |
|
*-------------------------------------------------------------- |
| 2225 |
|
* |
| 2226 |
|
* LineToPostscript -- |
| 2227 |
|
* |
| 2228 |
|
* This procedure is called to generate Postscript for |
| 2229 |
|
* line items. |
| 2230 |
|
* |
| 2231 |
|
* Results: |
| 2232 |
|
* The return value is a standard Tcl result. If an error |
| 2233 |
|
* occurs in generating Postscript then an error message is |
| 2234 |
|
* left in the interp's result, replacing whatever used |
| 2235 |
|
* to be there. If no error occurs, then Postscript for the |
| 2236 |
|
* item is appended to the result. |
| 2237 |
|
* |
| 2238 |
|
* Side effects: |
| 2239 |
|
* None. |
| 2240 |
|
* |
| 2241 |
|
*-------------------------------------------------------------- |
| 2242 |
|
*/ |
| 2243 |
|
|
| 2244 |
|
static int |
| 2245 |
|
LineToPostscript(interp, canvas, itemPtr, prepass) |
| 2246 |
|
Tcl_Interp *interp; /* Leave Postscript or error message |
| 2247 |
|
* here. */ |
| 2248 |
|
Tk_Canvas canvas; /* Information about overall canvas. */ |
| 2249 |
|
Tk_Item *itemPtr; /* Item for which Postscript is |
| 2250 |
|
* wanted. */ |
| 2251 |
|
int prepass; /* 1 means this is a prepass to |
| 2252 |
|
* collect font information; 0 means |
| 2253 |
|
* final Postscript is being created. */ |
| 2254 |
|
{ |
| 2255 |
|
LineItem *linePtr = (LineItem *) itemPtr; |
| 2256 |
|
char buffer[64 + TCL_INTEGER_SPACE]; |
| 2257 |
|
char *style; |
| 2258 |
|
|
| 2259 |
|
double width; |
| 2260 |
|
XColor *color; |
| 2261 |
|
Pixmap stipple; |
| 2262 |
|
Tk_State state = itemPtr->state; |
| 2263 |
|
|
| 2264 |
|
if(state == TK_STATE_NULL) { |
| 2265 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 2266 |
|
} |
| 2267 |
|
|
| 2268 |
|
width = linePtr->outline.width; |
| 2269 |
|
color = linePtr->outline.color; |
| 2270 |
|
stipple = linePtr->outline.stipple; |
| 2271 |
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) { |
| 2272 |
|
if (linePtr->outline.activeWidth>width) { |
| 2273 |
|
width = linePtr->outline.activeWidth; |
| 2274 |
|
} |
| 2275 |
|
if (linePtr->outline.activeColor!=NULL) { |
| 2276 |
|
color = linePtr->outline.activeColor; |
| 2277 |
|
} |
| 2278 |
|
if (linePtr->outline.activeStipple!=None) { |
| 2279 |
|
stipple = linePtr->outline.activeStipple; |
| 2280 |
|
} |
| 2281 |
|
} else if (state==TK_STATE_DISABLED) { |
| 2282 |
|
if (linePtr->outline.disabledWidth>0) { |
| 2283 |
|
width = linePtr->outline.disabledWidth; |
| 2284 |
|
} |
| 2285 |
|
if (linePtr->outline.disabledColor!=NULL) { |
| 2286 |
|
color = linePtr->outline.disabledColor; |
| 2287 |
|
} |
| 2288 |
|
if (linePtr->outline.disabledStipple!=None) { |
| 2289 |
|
stipple = linePtr->outline.disabledStipple; |
| 2290 |
|
} |
| 2291 |
|
} |
| 2292 |
|
|
| 2293 |
|
if (color == NULL || linePtr->numPoints<1 || linePtr->coordPtr==NULL) { |
| 2294 |
|
return TCL_OK; |
| 2295 |
|
} |
| 2296 |
|
|
| 2297 |
|
if (linePtr->numPoints==1) { |
| 2298 |
|
sprintf(buffer, "%.15g %.15g translate %.15g %.15g", |
| 2299 |
|
linePtr->coordPtr[0], Tk_CanvasPsY(canvas, linePtr->coordPtr[1]), |
| 2300 |
|
width/2.0, width/2.0); |
| 2301 |
|
Tcl_AppendResult(interp, "matrix currentmatrix\n",buffer, |
| 2302 |
|
" scale 1 0 moveto 0 0 1 0 360 arc\nsetmatrix\n", (char *) NULL); |
| 2303 |
|
if (Tk_CanvasPsColor(interp, canvas, color) |
| 2304 |
|
!= TCL_OK) { |
| 2305 |
|
return TCL_ERROR; |
| 2306 |
|
} |
| 2307 |
|
if (stipple != None) { |
| 2308 |
|
Tcl_AppendResult(interp, "clip ", (char *) NULL); |
| 2309 |
|
if (Tk_CanvasPsStipple(interp, canvas, stipple) != TCL_OK) { |
| 2310 |
|
return TCL_ERROR; |
| 2311 |
|
} |
| 2312 |
|
} else { |
| 2313 |
|
Tcl_AppendResult(interp, "fill\n", (char *) NULL); |
| 2314 |
|
} |
| 2315 |
|
return TCL_OK; |
| 2316 |
|
} |
| 2317 |
|
/* |
| 2318 |
|
* Generate a path for the line's center-line (do this differently |
| 2319 |
|
* for straight lines and smoothed lines). |
| 2320 |
|
*/ |
| 2321 |
|
|
| 2322 |
|
if ((!linePtr->smooth) || (linePtr->numPoints < 3)) { |
| 2323 |
|
Tk_CanvasPsPath(interp, canvas, linePtr->coordPtr, linePtr->numPoints); |
| 2324 |
|
} else { |
| 2325 |
|
if ((stipple == None) && linePtr->smooth->postscriptProc) { |
| 2326 |
|
linePtr->smooth->postscriptProc(interp, canvas, |
| 2327 |
|
linePtr->coordPtr, linePtr->numPoints, linePtr->splineSteps); |
| 2328 |
|
} else { |
| 2329 |
|
/* |
| 2330 |
|
* Special hack: Postscript printers don't appear to be able |
| 2331 |
|
* to turn a path drawn with "curveto"s into a clipping path |
| 2332 |
|
* without exceeding resource limits, so TkMakeBezierPostscript |
| 2333 |
|
* won't work for stippled curves. Instead, generate all of |
| 2334 |
|
* the intermediate points here and output them into the |
| 2335 |
|
* Postscript file with "lineto"s instead. |
| 2336 |
|
*/ |
| 2337 |
|
|
| 2338 |
|
double staticPoints[2*MAX_STATIC_POINTS]; |
| 2339 |
|
double *pointPtr; |
| 2340 |
|
int numPoints; |
| 2341 |
|
|
| 2342 |
|
numPoints = linePtr->smooth->coordProc(canvas, (double *) NULL, |
| 2343 |
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
| 2344 |
|
(double *) NULL); |
| 2345 |
|
pointPtr = staticPoints; |
| 2346 |
|
if (numPoints > MAX_STATIC_POINTS) { |
| 2347 |
|
pointPtr = (double *) ckalloc((unsigned) |
| 2348 |
|
(numPoints * 2 * sizeof(double))); |
| 2349 |
|
} |
| 2350 |
|
numPoints = linePtr->smooth->coordProc(canvas, linePtr->coordPtr, |
| 2351 |
|
linePtr->numPoints, linePtr->splineSteps, (XPoint *) NULL, |
| 2352 |
|
pointPtr); |
| 2353 |
|
Tk_CanvasPsPath(interp, canvas, pointPtr, numPoints); |
| 2354 |
|
if (pointPtr != staticPoints) { |
| 2355 |
|
ckfree((char *) pointPtr); |
| 2356 |
|
} |
| 2357 |
|
} |
| 2358 |
|
} |
| 2359 |
|
|
| 2360 |
|
/* |
| 2361 |
|
* Set other line-drawing parameters and stroke out the line. |
| 2362 |
|
*/ |
| 2363 |
|
|
| 2364 |
|
style = "0 setlinecap\n"; |
| 2365 |
|
if (linePtr->capStyle == CapRound) { |
| 2366 |
|
style = "1 setlinecap\n"; |
| 2367 |
|
} else if (linePtr->capStyle == CapProjecting) { |
| 2368 |
|
style = "2 setlinecap\n"; |
| 2369 |
|
} |
| 2370 |
|
Tcl_AppendResult(interp, style, (char *) NULL); |
| 2371 |
|
style = "0 setlinejoin\n"; |
| 2372 |
|
if (linePtr->joinStyle == JoinRound) { |
| 2373 |
|
style = "1 setlinejoin\n"; |
| 2374 |
|
} else if (linePtr->joinStyle == JoinBevel) { |
| 2375 |
|
style = "2 setlinejoin\n"; |
| 2376 |
|
} |
| 2377 |
|
Tcl_AppendResult(interp, style, (char *) NULL); |
| 2378 |
|
|
| 2379 |
|
if (Tk_CanvasPsOutline(canvas, itemPtr, |
| 2380 |
|
&(linePtr->outline)) != TCL_OK) { |
| 2381 |
|
return TCL_ERROR; |
| 2382 |
|
} |
| 2383 |
|
|
| 2384 |
|
/* |
| 2385 |
|
* Output polygons for the arrowheads, if there are any. |
| 2386 |
|
*/ |
| 2387 |
|
|
| 2388 |
|
if (linePtr->firstArrowPtr != NULL) { |
| 2389 |
|
if (stipple != None) { |
| 2390 |
|
Tcl_AppendResult(interp, "grestore gsave\n", |
| 2391 |
|
(char *) NULL); |
| 2392 |
|
} |
| 2393 |
|
if (ArrowheadPostscript(interp, canvas, linePtr, |
| 2394 |
|
linePtr->firstArrowPtr) != TCL_OK) { |
| 2395 |
|
return TCL_ERROR; |
| 2396 |
|
} |
| 2397 |
|
} |
| 2398 |
|
if (linePtr->lastArrowPtr != NULL) { |
| 2399 |
|
if (stipple != None) { |
| 2400 |
|
Tcl_AppendResult(interp, "grestore gsave\n", (char *) NULL); |
| 2401 |
|
} |
| 2402 |
|
if (ArrowheadPostscript(interp, canvas, linePtr, |
| 2403 |
|
linePtr->lastArrowPtr) != TCL_OK) { |
| 2404 |
|
return TCL_ERROR; |
| 2405 |
|
} |
| 2406 |
|
} |
| 2407 |
|
return TCL_OK; |
| 2408 |
|
} |
| 2409 |
|
|
| 2410 |
|
/* |
| 2411 |
|
*-------------------------------------------------------------- |
| 2412 |
|
* |
| 2413 |
|
* ArrowheadPostscript -- |
| 2414 |
|
* |
| 2415 |
|
* This procedure is called to generate Postscript for |
| 2416 |
|
* an arrowhead for a line item. |
| 2417 |
|
* |
| 2418 |
|
* Results: |
| 2419 |
|
* The return value is a standard Tcl result. If an error |
| 2420 |
|
* occurs in generating Postscript then an error message is |
| 2421 |
|
* left in the interp's result, replacing whatever used |
| 2422 |
|
* to be there. If no error occurs, then Postscript for the |
| 2423 |
|
* arrowhead is appended to the result. |
| 2424 |
|
* |
| 2425 |
|
* Side effects: |
| 2426 |
|
* None. |
| 2427 |
|
* |
| 2428 |
|
*-------------------------------------------------------------- |
| 2429 |
|
*/ |
| 2430 |
|
|
| 2431 |
|
static int |
| 2432 |
|
ArrowheadPostscript(interp, canvas, linePtr, arrowPtr) |
| 2433 |
|
Tcl_Interp *interp; /* Leave Postscript or error message |
| 2434 |
|
* here. */ |
| 2435 |
|
Tk_Canvas canvas; /* Information about overall canvas. */ |
| 2436 |
|
LineItem *linePtr; /* Line item for which Postscript is |
| 2437 |
|
* being generated. */ |
| 2438 |
|
double *arrowPtr; /* Pointer to first of five points |
| 2439 |
|
* describing arrowhead polygon. */ |
| 2440 |
|
{ |
| 2441 |
|
Pixmap stipple; |
| 2442 |
|
Tk_State state = linePtr->header.state; |
| 2443 |
|
|
| 2444 |
|
if(state == TK_STATE_NULL) { |
| 2445 |
|
state = ((TkCanvas *)canvas)->canvas_state; |
| 2446 |
|
} |
| 2447 |
|
|
| 2448 |
|
stipple = linePtr->outline.stipple; |
| 2449 |
|
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)linePtr) { |
| 2450 |
|
if (linePtr->outline.activeStipple!=None) { |
| 2451 |
|
stipple = linePtr->outline.activeStipple; |
| 2452 |
|
} |
| 2453 |
|
} else if (state==TK_STATE_DISABLED) { |
| 2454 |
|
if (linePtr->outline.activeStipple!=None) { |
| 2455 |
|
stipple = linePtr->outline.disabledStipple; |
| 2456 |
|
} |
| 2457 |
|
} |
| 2458 |
|
|
| 2459 |
|
Tk_CanvasPsPath(interp, canvas, arrowPtr, PTS_IN_ARROW); |
| 2460 |
|
if (stipple != None) { |
| 2461 |
|
Tcl_AppendResult(interp, "clip ", (char *) NULL); |
| 2462 |
|
if (Tk_CanvasPsStipple(interp, canvas, stipple) |
| 2463 |
|
!= TCL_OK) { |
| 2464 |
|
return TCL_ERROR; |
| 2465 |
|
} |
| 2466 |
|
} else { |
| 2467 |
|
Tcl_AppendResult(interp, "fill\n", (char *) NULL); |
| 2468 |
|
} |
| 2469 |
|
return TCL_OK; |
| 2470 |
|
} |
| 2471 |
|
|
| 2472 |
|
/* End of tkcanvline.c */ |
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