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dashley |
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/* $Header$ */
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dashley |
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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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308 |
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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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|
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 |
dashley |
69 |
/* End of tkcanvline.c */
|