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dashley |
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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkcanvimg.c,v 1.1.1.1 2001/06/13 04:56:24 dtashley Exp $ */
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/*
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* tkCanvImg.c --
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*
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* This file implements image items for canvas widgets.
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*
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* Copyright (c) 1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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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: tkcanvimg.c,v 1.1.1.1 2001/06/13 04:56:24 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 image item.
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*/
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typedef struct ImageItem {
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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_Canvas canvas; /* Canvas containing the image. */
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double x, y; /* Coordinates of positioning point for
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* image. */
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Tk_Anchor anchor; /* Where to anchor image relative to
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* (x,y). */
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char *imageString; /* String describing -image option (malloc-ed).
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* NULL means no image right now. */
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char *activeImageString; /* String describing -activeimage option.
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* NULL means no image right now. */
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char *disabledImageString; /* String describing -disabledimage option.
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* NULL means no image right now. */
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Tk_Image image; /* Image to display in window, or NULL if
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* no image at present. */
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Tk_Image activeImage; /* Image to display in window, or NULL if
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* no image at present. */
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Tk_Image disabledImage; /* Image to display in window, or NULL if
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* no image at present. */
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} ImageItem;
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/*
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* Information used for parsing configuration specs:
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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_ConfigSpec configSpecs[] = {
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{TK_CONFIG_STRING, "-activeimage", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(ImageItem, activeImageString),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL,
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"center", Tk_Offset(ImageItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_STRING, "-disabledimage", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(ImageItem, disabledImageString),
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TK_CONFIG_NULL_OK},
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{TK_CONFIG_STRING, "-image", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(ImageItem, imageString), TK_CONFIG_NULL_OK},
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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_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
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(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
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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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* Prototypes for procedures defined in this file:
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*/
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static void ImageChangedProc _ANSI_ARGS_((ClientData clientData,
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int x, int y, int width, int height, int imgWidth,
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int imgHeight));
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static int ImageCoords _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[]));
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static int ImageToArea _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, double *rectPtr));
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static double ImageToPoint _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, double *coordPtr));
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static int ImageToPostscript _ANSI_ARGS_((Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int prepass));
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static void ComputeImageBbox _ANSI_ARGS_((Tk_Canvas canvas,
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ImageItem *imgPtr));
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static int ConfigureImage _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 CreateImage _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 DeleteImage _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, Display *display));
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static void DisplayImage _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 void ScaleImage _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 TranslateImage _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, double deltaX, double deltaY));
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/*
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* The structures below defines the image item type in terms of
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* procedures that can be invoked by generic item code.
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*/
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Tk_ItemType tkImageType = {
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"image", /* name */
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sizeof(ImageItem), /* itemSize */
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CreateImage, /* createProc */
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configSpecs, /* configSpecs */
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ConfigureImage, /* configureProc */
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ImageCoords, /* coordProc */
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DeleteImage, /* deleteProc */
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DisplayImage, /* displayProc */
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TK_CONFIG_OBJS, /* flags */
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ImageToPoint, /* pointProc */
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ImageToArea, /* areaProc */
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ImageToPostscript, /* postscriptProc */
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ScaleImage, /* scaleProc */
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TranslateImage, /* translateProc */
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(Tk_ItemIndexProc *) NULL, /* indexProc */
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(Tk_ItemCursorProc *) NULL, /* icursorProc */
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(Tk_ItemSelectionProc *) NULL, /* selectionProc */
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(Tk_ItemInsertProc *) NULL, /* insertProc */
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(Tk_ItemDCharsProc *) NULL, /* dTextProc */
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(Tk_ItemType *) NULL, /* nextPtr */
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};
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/*
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*--------------------------------------------------------------
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*
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* CreateImage --
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*
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* This procedure is invoked to create a new image
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* item in 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 image 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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CreateImage(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 rectangle. */
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{
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ImageItem *imgPtr = (ImageItem *) itemPtr;
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int i;
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if (argc==1) {
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i = 1;
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} else {
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char *arg = Tcl_GetStringFromObj((Tcl_Obj *) argv[1], NULL);
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if (((argc>1) && (arg[0] == '-')
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&& (arg[1] >= 'a') && (arg[1] <= 'z'))) {
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i = 1;
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} else {
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i = 2;
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}
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}
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if (argc < i) {
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189 |
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Tcl_AppendResult(interp, "wrong # args: should be \"",
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Tk_PathName(Tk_CanvasTkwin(canvas)), " create ",
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itemPtr->typePtr->name, " x y ?options?\"",
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(char *) NULL);
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return TCL_ERROR;
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}
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/*
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* Initialize item's record.
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*/
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199 |
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imgPtr->canvas = canvas;
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imgPtr->anchor = TK_ANCHOR_CENTER;
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imgPtr->imageString = NULL;
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203 |
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imgPtr->activeImageString = NULL;
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204 |
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imgPtr->disabledImageString = NULL;
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205 |
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imgPtr->image = NULL;
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206 |
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imgPtr->activeImage = NULL;
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imgPtr->disabledImage = NULL;
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208 |
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209 |
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/*
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210 |
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* Process the arguments to fill in the item record.
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211 |
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*/
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212 |
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213 |
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if ((ImageCoords(interp, canvas, itemPtr, i, argv) != TCL_OK)) {
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goto error;
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}
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if (ConfigureImage(interp, canvas, itemPtr, argc-i, argv+i, 0) == TCL_OK) {
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return TCL_OK;
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}
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error:
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DeleteImage(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
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return TCL_ERROR;
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}
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225 |
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/*
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*--------------------------------------------------------------
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227 |
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*
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* ImageCoords --
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229 |
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*
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230 |
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* This procedure is invoked to process the "coords" widget
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231 |
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* command on image items. See the user documentation for
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232 |
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* details on what it does.
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*
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234 |
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* Results:
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235 |
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* Returns TCL_OK or TCL_ERROR, and sets the interp's result.
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236 |
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*
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237 |
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* Side effects:
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238 |
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* The coordinates for the given item may be changed.
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*
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240 |
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*--------------------------------------------------------------
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241 |
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*/
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242 |
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static int
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ImageCoords(interp, canvas, itemPtr, argc, argv)
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245 |
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Tcl_Interp *interp; /* Used for error reporting. */
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Tk_Canvas canvas; /* Canvas containing item. */
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247 |
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Tk_Item *itemPtr; /* Item whose coordinates are to be
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248 |
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* read or modified. */
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249 |
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int argc; /* Number of coordinates supplied in
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250 |
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* argv. */
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251 |
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Tcl_Obj *CONST argv[]; /* Array of coordinates: x1, y1,
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252 |
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* x2, y2, ... */
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253 |
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{
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254 |
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ImageItem *imgPtr = (ImageItem *) itemPtr;
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256 |
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if (argc == 0) {
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257 |
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Tcl_Obj *obj = Tcl_NewObj();
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258 |
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Tcl_Obj *subobj = Tcl_NewDoubleObj(imgPtr->x);
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259 |
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Tcl_ListObjAppendElement(interp, obj, subobj);
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subobj = Tcl_NewDoubleObj(imgPtr->y);
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Tcl_ListObjAppendElement(interp, obj, subobj);
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Tcl_SetObjResult(interp, obj);
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263 |
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} else if (argc < 3) {
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264 |
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if (argc==1) {
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265 |
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if (Tcl_ListObjGetElements(interp, argv[0], &argc,
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266 |
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(Tcl_Obj ***) &argv) != TCL_OK) {
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267 |
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return TCL_ERROR;
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268 |
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} else if (argc != 2) {
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269 |
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char buf[64];
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270 |
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271 |
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sprintf(buf, "wrong # coordinates: expected 2, got %d", argc);
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272 |
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Tcl_SetResult(interp, buf, TCL_VOLATILE);
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273 |
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return TCL_ERROR;
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274 |
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}
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275 |
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}
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276 |
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if ((Tk_CanvasGetCoordFromObj(interp, canvas, argv[0], &imgPtr->x) != TCL_OK)
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277 |
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|| (Tk_CanvasGetCoordFromObj(interp, canvas, argv[1],
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278 |
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&imgPtr->y) != TCL_OK)) {
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279 |
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return TCL_ERROR;
|
280 |
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}
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281 |
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ComputeImageBbox(canvas, imgPtr);
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282 |
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} else {
|
283 |
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char buf[64];
|
284 |
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285 |
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sprintf(buf, "wrong # coordinates: expected 0 or 2, got %d", argc);
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286 |
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Tcl_SetResult(interp, buf, TCL_VOLATILE);
|
287 |
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return TCL_ERROR;
|
288 |
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}
|
289 |
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return TCL_OK;
|
290 |
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}
|
291 |
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|
292 |
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/*
|
293 |
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*--------------------------------------------------------------
|
294 |
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*
|
295 |
|
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* ConfigureImage --
|
296 |
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*
|
297 |
|
|
* This procedure is invoked to configure various aspects
|
298 |
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* of an image item, such as its anchor position.
|
299 |
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|
*
|
300 |
|
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* Results:
|
301 |
|
|
* A standard Tcl result code. If an error occurs, then
|
302 |
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* an error message is left in the interp's result.
|
303 |
|
|
*
|
304 |
|
|
* Side effects:
|
305 |
|
|
* Configuration information may be set for itemPtr.
|
306 |
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|
*
|
307 |
|
|
*--------------------------------------------------------------
|
308 |
|
|
*/
|
309 |
|
|
|
310 |
|
|
static int
|
311 |
|
|
ConfigureImage(interp, canvas, itemPtr, argc, argv, flags)
|
312 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */
|
313 |
|
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Tk_Canvas canvas; /* Canvas containing itemPtr. */
|
314 |
|
|
Tk_Item *itemPtr; /* Image item to reconfigure. */
|
315 |
|
|
int argc; /* Number of elements in argv. */
|
316 |
|
|
Tcl_Obj *CONST argv[]; /* Arguments describing things to configure. */
|
317 |
|
|
int flags; /* Flags to pass to Tk_ConfigureWidget. */
|
318 |
|
|
{
|
319 |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr;
|
320 |
|
|
Tk_Window tkwin;
|
321 |
|
|
Tk_Image image;
|
322 |
|
|
|
323 |
|
|
tkwin = Tk_CanvasTkwin(canvas);
|
324 |
|
|
if (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, (char **) argv,
|
325 |
|
|
(char *) imgPtr, flags|TK_CONFIG_OBJS) != TCL_OK) {
|
326 |
|
|
return TCL_ERROR;
|
327 |
|
|
}
|
328 |
|
|
|
329 |
|
|
/*
|
330 |
|
|
* Create the image. Save the old image around and don't free it
|
331 |
|
|
* until after the new one is allocated. This keeps the reference
|
332 |
|
|
* count from going to zero so the image doesn't have to be recreated
|
333 |
|
|
* if it hasn't changed.
|
334 |
|
|
*/
|
335 |
|
|
|
336 |
|
|
if (imgPtr->activeImageString != NULL) {
|
337 |
|
|
itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT;
|
338 |
|
|
} else {
|
339 |
|
|
itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT;
|
340 |
|
|
}
|
341 |
|
|
if (imgPtr->imageString != NULL) {
|
342 |
|
|
image = Tk_GetImage(interp, tkwin, imgPtr->imageString,
|
343 |
|
|
ImageChangedProc, (ClientData) imgPtr);
|
344 |
|
|
if (image == NULL) {
|
345 |
|
|
return TCL_ERROR;
|
346 |
|
|
}
|
347 |
|
|
} else {
|
348 |
|
|
image = NULL;
|
349 |
|
|
}
|
350 |
|
|
if (imgPtr->image != NULL) {
|
351 |
|
|
Tk_FreeImage(imgPtr->image);
|
352 |
|
|
}
|
353 |
|
|
imgPtr->image = image;
|
354 |
|
|
if (imgPtr->activeImageString != NULL) {
|
355 |
|
|
image = Tk_GetImage(interp, tkwin, imgPtr->activeImageString,
|
356 |
|
|
ImageChangedProc, (ClientData) imgPtr);
|
357 |
|
|
if (image == NULL) {
|
358 |
|
|
return TCL_ERROR;
|
359 |
|
|
}
|
360 |
|
|
} else {
|
361 |
|
|
image = NULL;
|
362 |
|
|
}
|
363 |
|
|
if (imgPtr->activeImage != NULL) {
|
364 |
|
|
Tk_FreeImage(imgPtr->activeImage);
|
365 |
|
|
}
|
366 |
|
|
imgPtr->activeImage = image;
|
367 |
|
|
if (imgPtr->disabledImageString != NULL) {
|
368 |
|
|
image = Tk_GetImage(interp, tkwin, imgPtr->disabledImageString,
|
369 |
|
|
ImageChangedProc, (ClientData) imgPtr);
|
370 |
|
|
if (image == NULL) {
|
371 |
|
|
return TCL_ERROR;
|
372 |
|
|
}
|
373 |
|
|
} else {
|
374 |
|
|
image = NULL;
|
375 |
|
|
}
|
376 |
|
|
if (imgPtr->disabledImage != NULL) {
|
377 |
|
|
Tk_FreeImage(imgPtr->disabledImage);
|
378 |
|
|
}
|
379 |
|
|
imgPtr->disabledImage = image;
|
380 |
|
|
ComputeImageBbox(canvas, imgPtr);
|
381 |
|
|
return TCL_OK;
|
382 |
|
|
}
|
383 |
|
|
|
384 |
|
|
/*
|
385 |
|
|
*--------------------------------------------------------------
|
386 |
|
|
*
|
387 |
|
|
* DeleteImage --
|
388 |
|
|
*
|
389 |
|
|
* This procedure is called to clean up the data structure
|
390 |
|
|
* associated with a image item.
|
391 |
|
|
*
|
392 |
|
|
* Results:
|
393 |
|
|
* None.
|
394 |
|
|
*
|
395 |
|
|
* Side effects:
|
396 |
|
|
* Resources associated with itemPtr are released.
|
397 |
|
|
*
|
398 |
|
|
*--------------------------------------------------------------
|
399 |
|
|
*/
|
400 |
|
|
|
401 |
|
|
static void
|
402 |
|
|
DeleteImage(canvas, itemPtr, display)
|
403 |
|
|
Tk_Canvas canvas; /* Info about overall canvas widget. */
|
404 |
|
|
Tk_Item *itemPtr; /* Item that is being deleted. */
|
405 |
|
|
Display *display; /* Display containing window for
|
406 |
|
|
* canvas. */
|
407 |
|
|
{
|
408 |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr;
|
409 |
|
|
|
410 |
|
|
if (imgPtr->imageString != NULL) {
|
411 |
|
|
ckfree(imgPtr->imageString);
|
412 |
|
|
}
|
413 |
|
|
if (imgPtr->activeImageString != NULL) {
|
414 |
|
|
ckfree(imgPtr->activeImageString);
|
415 |
|
|
}
|
416 |
|
|
if (imgPtr->disabledImageString != NULL) {
|
417 |
|
|
ckfree(imgPtr->disabledImageString);
|
418 |
|
|
}
|
419 |
|
|
if (imgPtr->image != NULL) {
|
420 |
|
|
Tk_FreeImage(imgPtr->image);
|
421 |
|
|
}
|
422 |
|
|
if (imgPtr->activeImage != NULL) {
|
423 |
|
|
Tk_FreeImage(imgPtr->activeImage);
|
424 |
|
|
}
|
425 |
|
|
if (imgPtr->disabledImage != NULL) {
|
426 |
|
|
Tk_FreeImage(imgPtr->disabledImage);
|
427 |
|
|
}
|
428 |
|
|
}
|
429 |
|
|
|
430 |
|
|
/*
|
431 |
|
|
*--------------------------------------------------------------
|
432 |
|
|
*
|
433 |
|
|
* ComputeImageBbox --
|
434 |
|
|
*
|
435 |
|
|
* This procedure is invoked to compute the bounding box of
|
436 |
|
|
* all the pixels that may be drawn as part of a image item.
|
437 |
|
|
* This procedure is where the child image's placement is
|
438 |
|
|
* computed.
|
439 |
|
|
*
|
440 |
|
|
* Results:
|
441 |
|
|
* None.
|
442 |
|
|
*
|
443 |
|
|
* Side effects:
|
444 |
|
|
* The fields x1, y1, x2, and y2 are updated in the header
|
445 |
|
|
* for itemPtr.
|
446 |
|
|
*
|
447 |
|
|
*--------------------------------------------------------------
|
448 |
|
|
*/
|
449 |
|
|
|
450 |
|
|
/* ARGSUSED */
|
451 |
|
|
static void
|
452 |
|
|
ComputeImageBbox(canvas, imgPtr)
|
453 |
|
|
Tk_Canvas canvas; /* Canvas that contains item. */
|
454 |
|
|
ImageItem *imgPtr; /* Item whose bbox is to be
|
455 |
|
|
* recomputed. */
|
456 |
|
|
{
|
457 |
|
|
int width, height;
|
458 |
|
|
int x, y;
|
459 |
|
|
Tk_Image image;
|
460 |
|
|
Tk_State state = imgPtr->header.state;
|
461 |
|
|
|
462 |
|
|
if(state == TK_STATE_NULL) {
|
463 |
|
|
state = ((TkCanvas *)canvas)->canvas_state;
|
464 |
|
|
}
|
465 |
|
|
image = imgPtr->image;
|
466 |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == (Tk_Item *)imgPtr) {
|
467 |
|
|
if (imgPtr->activeImage != NULL) {
|
468 |
|
|
image = imgPtr->activeImage;
|
469 |
|
|
}
|
470 |
|
|
} else if (state == TK_STATE_DISABLED) {
|
471 |
|
|
if (imgPtr->disabledImage != NULL) {
|
472 |
|
|
image = imgPtr->disabledImage;
|
473 |
|
|
}
|
474 |
|
|
}
|
475 |
|
|
|
476 |
|
|
x = (int) (imgPtr->x + ((imgPtr->x >= 0) ? 0.5 : - 0.5));
|
477 |
|
|
y = (int) (imgPtr->y + ((imgPtr->y >= 0) ? 0.5 : - 0.5));
|
478 |
|
|
|
479 |
|
|
if ((state == TK_STATE_HIDDEN) || (image == None)) {
|
480 |
|
|
imgPtr->header.x1 = imgPtr->header.x2 = x;
|
481 |
|
|
imgPtr->header.y1 = imgPtr->header.y2 = y;
|
482 |
|
|
return;
|
483 |
|
|
}
|
484 |
|
|
|
485 |
|
|
/*
|
486 |
|
|
* Compute location and size of image, using anchor information.
|
487 |
|
|
*/
|
488 |
|
|
|
489 |
|
|
Tk_SizeOfImage(image, &width, &height);
|
490 |
|
|
switch (imgPtr->anchor) {
|
491 |
|
|
case TK_ANCHOR_N:
|
492 |
|
|
x -= width/2;
|
493 |
|
|
break;
|
494 |
|
|
case TK_ANCHOR_NE:
|
495 |
|
|
x -= width;
|
496 |
|
|
break;
|
497 |
|
|
case TK_ANCHOR_E:
|
498 |
|
|
x -= width;
|
499 |
|
|
y -= height/2;
|
500 |
|
|
break;
|
501 |
|
|
case TK_ANCHOR_SE:
|
502 |
|
|
x -= width;
|
503 |
|
|
y -= height;
|
504 |
|
|
break;
|
505 |
|
|
case TK_ANCHOR_S:
|
506 |
|
|
x -= width/2;
|
507 |
|
|
y -= height;
|
508 |
|
|
break;
|
509 |
|
|
case TK_ANCHOR_SW:
|
510 |
|
|
y -= height;
|
511 |
|
|
break;
|
512 |
|
|
case TK_ANCHOR_W:
|
513 |
|
|
y -= height/2;
|
514 |
|
|
break;
|
515 |
|
|
case TK_ANCHOR_NW:
|
516 |
|
|
break;
|
517 |
|
|
case TK_ANCHOR_CENTER:
|
518 |
|
|
x -= width/2;
|
519 |
|
|
y -= height/2;
|
520 |
|
|
break;
|
521 |
|
|
}
|
522 |
|
|
|
523 |
|
|
/*
|
524 |
|
|
* Store the information in the item header.
|
525 |
|
|
*/
|
526 |
|
|
|
527 |
|
|
imgPtr->header.x1 = x;
|
528 |
|
|
imgPtr->header.y1 = y;
|
529 |
|
|
imgPtr->header.x2 = x + width;
|
530 |
|
|
imgPtr->header.y2 = y + height;
|
531 |
|
|
}
|
532 |
|
|
|
533 |
|
|
/*
|
534 |
|
|
*--------------------------------------------------------------
|
535 |
|
|
*
|
536 |
|
|
* DisplayImage --
|
537 |
|
|
*
|
538 |
|
|
* This procedure is invoked to draw a image item in a given
|
539 |
|
|
* drawable.
|
540 |
|
|
*
|
541 |
|
|
* Results:
|
542 |
|
|
* None.
|
543 |
|
|
*
|
544 |
|
|
* Side effects:
|
545 |
|
|
* ItemPtr is drawn in drawable using the transformation
|
546 |
|
|
* information in canvas.
|
547 |
|
|
*
|
548 |
|
|
*--------------------------------------------------------------
|
549 |
|
|
*/
|
550 |
|
|
|
551 |
|
|
static void
|
552 |
|
|
DisplayImage(canvas, itemPtr, display, drawable, x, y, width, height)
|
553 |
|
|
Tk_Canvas canvas; /* Canvas that contains item. */
|
554 |
|
|
Tk_Item *itemPtr; /* Item to be displayed. */
|
555 |
|
|
Display *display; /* Display on which to draw item. */
|
556 |
|
|
Drawable drawable; /* Pixmap or window in which to draw
|
557 |
|
|
* item. */
|
558 |
|
|
int x, y, width, height; /* Describes region of canvas that
|
559 |
|
|
* must be redisplayed (not used). */
|
560 |
|
|
{
|
561 |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr;
|
562 |
|
|
short drawableX, drawableY;
|
563 |
|
|
Tk_Image image;
|
564 |
|
|
Tk_State state = itemPtr->state;
|
565 |
|
|
|
566 |
|
|
if(state == TK_STATE_NULL) {
|
567 |
|
|
state = ((TkCanvas *)canvas)->canvas_state;
|
568 |
|
|
}
|
569 |
|
|
|
570 |
|
|
image = imgPtr->image;
|
571 |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
572 |
|
|
if (imgPtr->activeImage != NULL) {
|
573 |
|
|
image = imgPtr->activeImage;
|
574 |
|
|
}
|
575 |
|
|
} else if (state == TK_STATE_DISABLED) {
|
576 |
|
|
if (imgPtr->disabledImage != NULL) {
|
577 |
|
|
image = imgPtr->disabledImage;
|
578 |
|
|
}
|
579 |
|
|
}
|
580 |
|
|
|
581 |
|
|
if (image == NULL) {
|
582 |
|
|
return;
|
583 |
|
|
}
|
584 |
|
|
|
585 |
|
|
/*
|
586 |
|
|
* Translate the coordinates to those of the image, then redisplay it.
|
587 |
|
|
*/
|
588 |
|
|
|
589 |
|
|
Tk_CanvasDrawableCoords(canvas, (double) x, (double) y,
|
590 |
|
|
&drawableX, &drawableY);
|
591 |
|
|
Tk_RedrawImage(image, x - imgPtr->header.x1, y - imgPtr->header.y1,
|
592 |
|
|
width, height, drawable, drawableX, drawableY);
|
593 |
|
|
}
|
594 |
|
|
|
595 |
|
|
/*
|
596 |
|
|
*--------------------------------------------------------------
|
597 |
|
|
*
|
598 |
|
|
* ImageToPoint --
|
599 |
|
|
*
|
600 |
|
|
* Computes the distance from a given point to a given
|
601 |
|
|
* rectangle, in canvas units.
|
602 |
|
|
*
|
603 |
|
|
* Results:
|
604 |
|
|
* The return value is 0 if the point whose x and y coordinates
|
605 |
|
|
* are coordPtr[0] and coordPtr[1] is inside the image. If the
|
606 |
|
|
* point isn't inside the image then the return value is the
|
607 |
|
|
* distance from the point to the image.
|
608 |
|
|
*
|
609 |
|
|
* Side effects:
|
610 |
|
|
* None.
|
611 |
|
|
*
|
612 |
|
|
*--------------------------------------------------------------
|
613 |
|
|
*/
|
614 |
|
|
|
615 |
|
|
static double
|
616 |
|
|
ImageToPoint(canvas, itemPtr, coordPtr)
|
617 |
|
|
Tk_Canvas canvas; /* Canvas containing item. */
|
618 |
|
|
Tk_Item *itemPtr; /* Item to check against point. */
|
619 |
|
|
double *coordPtr; /* Pointer to x and y coordinates. */
|
620 |
|
|
{
|
621 |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr;
|
622 |
|
|
double x1, x2, y1, y2, xDiff, yDiff;
|
623 |
|
|
|
624 |
|
|
x1 = imgPtr->header.x1;
|
625 |
|
|
y1 = imgPtr->header.y1;
|
626 |
|
|
x2 = imgPtr->header.x2;
|
627 |
|
|
y2 = imgPtr->header.y2;
|
628 |
|
|
|
629 |
|
|
/*
|
630 |
|
|
* Point is outside rectangle.
|
631 |
|
|
*/
|
632 |
|
|
|
633 |
|
|
if (coordPtr[0] < x1) {
|
634 |
|
|
xDiff = x1 - coordPtr[0];
|
635 |
|
|
} else if (coordPtr[0] > x2) {
|
636 |
|
|
xDiff = coordPtr[0] - x2;
|
637 |
|
|
} else {
|
638 |
|
|
xDiff = 0;
|
639 |
|
|
}
|
640 |
|
|
|
641 |
|
|
if (coordPtr[1] < y1) {
|
642 |
|
|
yDiff = y1 - coordPtr[1];
|
643 |
|
|
} else if (coordPtr[1] > y2) {
|
644 |
|
|
yDiff = coordPtr[1] - y2;
|
645 |
|
|
} else {
|
646 |
|
|
yDiff = 0;
|
647 |
|
|
}
|
648 |
|
|
|
649 |
|
|
return hypot(xDiff, yDiff);
|
650 |
|
|
}
|
651 |
|
|
|
652 |
|
|
/*
|
653 |
|
|
*--------------------------------------------------------------
|
654 |
|
|
*
|
655 |
|
|
* ImageToArea --
|
656 |
|
|
*
|
657 |
|
|
* This procedure is called to determine whether an item
|
658 |
|
|
* lies entirely inside, entirely outside, or overlapping
|
659 |
|
|
* a given rectangle.
|
660 |
|
|
*
|
661 |
|
|
* Results:
|
662 |
|
|
* -1 is returned if the item is entirely outside the area
|
663 |
|
|
* given by rectPtr, 0 if it overlaps, and 1 if it is entirely
|
664 |
|
|
* inside the given area.
|
665 |
|
|
*
|
666 |
|
|
* Side effects:
|
667 |
|
|
* None.
|
668 |
|
|
*
|
669 |
|
|
*--------------------------------------------------------------
|
670 |
|
|
*/
|
671 |
|
|
|
672 |
|
|
static int
|
673 |
|
|
ImageToArea(canvas, itemPtr, rectPtr)
|
674 |
|
|
Tk_Canvas canvas; /* Canvas containing item. */
|
675 |
|
|
Tk_Item *itemPtr; /* Item to check against rectangle. */
|
676 |
|
|
double *rectPtr; /* Pointer to array of four coordinates
|
677 |
|
|
* (x1, y1, x2, y2) describing rectangular
|
678 |
|
|
* area. */
|
679 |
|
|
{
|
680 |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr;
|
681 |
|
|
|
682 |
|
|
if ((rectPtr[2] <= imgPtr->header.x1)
|
683 |
|
|
|| (rectPtr[0] >= imgPtr->header.x2)
|
684 |
|
|
|| (rectPtr[3] <= imgPtr->header.y1)
|
685 |
|
|
|| (rectPtr[1] >= imgPtr->header.y2)) {
|
686 |
|
|
return -1;
|
687 |
|
|
}
|
688 |
|
|
if ((rectPtr[0] <= imgPtr->header.x1)
|
689 |
|
|
&& (rectPtr[1] <= imgPtr->header.y1)
|
690 |
|
|
&& (rectPtr[2] >= imgPtr->header.x2)
|
691 |
|
|
&& (rectPtr[3] >= imgPtr->header.y2)) {
|
692 |
|
|
return 1;
|
693 |
|
|
}
|
694 |
|
|
return 0;
|
695 |
|
|
}
|
696 |
|
|
|
697 |
|
|
/*
|
698 |
|
|
*--------------------------------------------------------------
|
699 |
|
|
*
|
700 |
|
|
* ImageToPostscript --
|
701 |
|
|
*
|
702 |
|
|
* This procedure is called to generate Postscript for
|
703 |
|
|
* image items.
|
704 |
|
|
*
|
705 |
|
|
* Results:
|
706 |
|
|
* The return value is a standard Tcl result. If an error
|
707 |
|
|
* occurs in generating Postscript then an error message is
|
708 |
|
|
* left in interp->result, replacing whatever used to be there.
|
709 |
|
|
* If no error occurs, then Postscript for the item is appended
|
710 |
|
|
* to the result.
|
711 |
|
|
*
|
712 |
|
|
* Side effects:
|
713 |
|
|
* None.
|
714 |
|
|
*
|
715 |
|
|
*--------------------------------------------------------------
|
716 |
|
|
*/
|
717 |
|
|
|
718 |
|
|
static int
|
719 |
|
|
ImageToPostscript(interp, canvas, itemPtr, prepass)
|
720 |
|
|
Tcl_Interp *interp; /* Leave Postscript or error message
|
721 |
|
|
* here. */
|
722 |
|
|
Tk_Canvas canvas; /* Information about overall canvas. */
|
723 |
|
|
Tk_Item *itemPtr; /* Item for which Postscript is
|
724 |
|
|
* wanted. */
|
725 |
|
|
int prepass; /* 1 means this is a prepass to
|
726 |
|
|
* collect font information; 0 means
|
727 |
|
|
* final Postscript is being created.*/
|
728 |
|
|
{
|
729 |
|
|
ImageItem *imgPtr = (ImageItem *)itemPtr;
|
730 |
|
|
Tk_Window canvasWin = Tk_CanvasTkwin(canvas);
|
731 |
|
|
|
732 |
|
|
char buffer[256];
|
733 |
|
|
double x, y;
|
734 |
|
|
int width, height;
|
735 |
|
|
Tk_Image image;
|
736 |
|
|
Tk_State state = itemPtr->state;
|
737 |
|
|
|
738 |
|
|
if(state == TK_STATE_NULL) {
|
739 |
|
|
state = ((TkCanvas *)canvas)->canvas_state;
|
740 |
|
|
}
|
741 |
|
|
|
742 |
|
|
image = imgPtr->image;
|
743 |
|
|
if (((TkCanvas *)canvas)->currentItemPtr == itemPtr) {
|
744 |
|
|
if (imgPtr->activeImage != NULL) {
|
745 |
|
|
image = imgPtr->activeImage;
|
746 |
|
|
}
|
747 |
|
|
} else if (state == TK_STATE_DISABLED) {
|
748 |
|
|
if (imgPtr->disabledImage != NULL) {
|
749 |
|
|
image = imgPtr->disabledImage;
|
750 |
|
|
}
|
751 |
|
|
}
|
752 |
|
|
Tk_SizeOfImage(image, &width, &height);
|
753 |
|
|
|
754 |
|
|
/*
|
755 |
|
|
* Compute the coordinates of the lower-left corner of the image,
|
756 |
|
|
* taking into account the anchor position for the image.
|
757 |
|
|
*/
|
758 |
|
|
|
759 |
|
|
x = imgPtr->x;
|
760 |
|
|
y = Tk_CanvasPsY(canvas, imgPtr->y);
|
761 |
|
|
|
762 |
|
|
switch (imgPtr->anchor) {
|
763 |
|
|
case TK_ANCHOR_NW: y -= height; break;
|
764 |
|
|
case TK_ANCHOR_N: x -= width/2.0; y -= height; break;
|
765 |
|
|
case TK_ANCHOR_NE: x -= width; y -= height; break;
|
766 |
|
|
case TK_ANCHOR_E: x -= width; y -= height/2.0; break;
|
767 |
|
|
case TK_ANCHOR_SE: x -= width; break;
|
768 |
|
|
case TK_ANCHOR_S: x -= width/2.0; break;
|
769 |
|
|
case TK_ANCHOR_SW: break;
|
770 |
|
|
case TK_ANCHOR_W: y -= height/2.0; break;
|
771 |
|
|
case TK_ANCHOR_CENTER: x -= width/2.0; y -= height/2.0; break;
|
772 |
|
|
}
|
773 |
|
|
|
774 |
|
|
if (image == NULL) {
|
775 |
|
|
return TCL_OK;
|
776 |
|
|
}
|
777 |
|
|
|
778 |
|
|
if (!prepass) {
|
779 |
|
|
sprintf(buffer, "%.15g %.15g", x, y);
|
780 |
|
|
Tcl_AppendResult(interp, buffer, " translate\n", (char *) NULL);
|
781 |
|
|
}
|
782 |
|
|
|
783 |
|
|
return Tk_PostscriptImage(image, interp, canvasWin,
|
784 |
|
|
((TkCanvas *) canvas)->psInfo, 0, 0, width, height, prepass);
|
785 |
|
|
}
|
786 |
|
|
|
787 |
|
|
/*
|
788 |
|
|
*--------------------------------------------------------------
|
789 |
|
|
*
|
790 |
|
|
* ScaleImage --
|
791 |
|
|
*
|
792 |
|
|
* This procedure is invoked to rescale an item.
|
793 |
|
|
*
|
794 |
|
|
* Results:
|
795 |
|
|
* None.
|
796 |
|
|
*
|
797 |
|
|
* Side effects:
|
798 |
|
|
* The item referred to by itemPtr is rescaled so that the
|
799 |
|
|
* following transformation is applied to all point coordinates:
|
800 |
|
|
* x' = originX + scaleX*(x-originX)
|
801 |
|
|
* y' = originY + scaleY*(y-originY)
|
802 |
|
|
*
|
803 |
|
|
*--------------------------------------------------------------
|
804 |
|
|
*/
|
805 |
|
|
|
806 |
|
|
static void
|
807 |
|
|
ScaleImage(canvas, itemPtr, originX, originY, scaleX, scaleY)
|
808 |
|
|
Tk_Canvas canvas; /* Canvas containing rectangle. */
|
809 |
|
|
Tk_Item *itemPtr; /* Rectangle to be scaled. */
|
810 |
|
|
double originX, originY; /* Origin about which to scale rect. */
|
811 |
|
|
double scaleX; /* Amount to scale in X direction. */
|
812 |
|
|
double scaleY; /* Amount to scale in Y direction. */
|
813 |
|
|
{
|
814 |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr;
|
815 |
|
|
|
816 |
|
|
imgPtr->x = originX + scaleX*(imgPtr->x - originX);
|
817 |
|
|
imgPtr->y = originY + scaleY*(imgPtr->y - originY);
|
818 |
|
|
ComputeImageBbox(canvas, imgPtr);
|
819 |
|
|
}
|
820 |
|
|
|
821 |
|
|
/*
|
822 |
|
|
*--------------------------------------------------------------
|
823 |
|
|
*
|
824 |
|
|
* TranslateImage --
|
825 |
|
|
*
|
826 |
|
|
* This procedure is called to move an item by a given amount.
|
827 |
|
|
*
|
828 |
|
|
* Results:
|
829 |
|
|
* None.
|
830 |
|
|
*
|
831 |
|
|
* Side effects:
|
832 |
|
|
* The position of the item is offset by (xDelta, yDelta), and
|
833 |
|
|
* the bounding box is updated in the generic part of the item
|
834 |
|
|
* structure.
|
835 |
|
|
*
|
836 |
|
|
*--------------------------------------------------------------
|
837 |
|
|
*/
|
838 |
|
|
|
839 |
|
|
static void
|
840 |
|
|
TranslateImage(canvas, itemPtr, deltaX, deltaY)
|
841 |
|
|
Tk_Canvas canvas; /* Canvas containing item. */
|
842 |
|
|
Tk_Item *itemPtr; /* Item that is being moved. */
|
843 |
|
|
double deltaX, deltaY; /* Amount by which item is to be
|
844 |
|
|
* moved. */
|
845 |
|
|
{
|
846 |
|
|
ImageItem *imgPtr = (ImageItem *) itemPtr;
|
847 |
|
|
|
848 |
|
|
imgPtr->x += deltaX;
|
849 |
|
|
imgPtr->y += deltaY;
|
850 |
|
|
ComputeImageBbox(canvas, imgPtr);
|
851 |
|
|
}
|
852 |
|
|
|
853 |
|
|
/*
|
854 |
|
|
*----------------------------------------------------------------------
|
855 |
|
|
*
|
856 |
|
|
* ImageChangedProc --
|
857 |
|
|
*
|
858 |
|
|
* This procedure is invoked by the image code whenever the manager
|
859 |
|
|
* for an image does something that affects the image's size or
|
860 |
|
|
* how it is displayed.
|
861 |
|
|
*
|
862 |
|
|
* Results:
|
863 |
|
|
* None.
|
864 |
|
|
*
|
865 |
|
|
* Side effects:
|
866 |
|
|
* Arranges for the canvas to get redisplayed.
|
867 |
|
|
*
|
868 |
|
|
*----------------------------------------------------------------------
|
869 |
|
|
*/
|
870 |
|
|
|
871 |
|
|
static void
|
872 |
|
|
ImageChangedProc(clientData, x, y, width, height, imgWidth, imgHeight)
|
873 |
|
|
ClientData clientData; /* Pointer to canvas item for image. */
|
874 |
|
|
int x, y; /* Upper left pixel (within image)
|
875 |
|
|
* that must be redisplayed. */
|
876 |
|
|
int width, height; /* Dimensions of area to redisplay
|
877 |
|
|
* (may be <= 0). */
|
878 |
|
|
int imgWidth, imgHeight; /* New dimensions of image. */
|
879 |
|
|
{
|
880 |
|
|
ImageItem *imgPtr = (ImageItem *) clientData;
|
881 |
|
|
|
882 |
|
|
/*
|
883 |
|
|
* If the image's size changed and it's not anchored at its
|
884 |
|
|
* northwest corner then just redisplay the entire area of the
|
885 |
|
|
* image. This is a bit over-conservative, but we need to do
|
886 |
|
|
* something because a size change also means a position change.
|
887 |
|
|
*/
|
888 |
|
|
|
889 |
|
|
if (((imgPtr->header.x2 - imgPtr->header.x1) != imgWidth)
|
890 |
|
|
|| ((imgPtr->header.y2 - imgPtr->header.y1) != imgHeight)) {
|
891 |
|
|
x = y = 0;
|
892 |
|
|
width = imgWidth;
|
893 |
|
|
height = imgHeight;
|
894 |
|
|
Tk_CanvasEventuallyRedraw(imgPtr->canvas, imgPtr->header.x1,
|
895 |
|
|
imgPtr->header.y1, imgPtr->header.x2, imgPtr->header.y2);
|
896 |
|
|
}
|
897 |
|
|
ComputeImageBbox(imgPtr->canvas, imgPtr);
|
898 |
|
|
Tk_CanvasEventuallyRedraw(imgPtr->canvas, imgPtr->header.x1 + x,
|
899 |
|
|
imgPtr->header.y1 + y, (int) (imgPtr->header.x1 + x + width),
|
900 |
|
|
(int) (imgPtr->header.y1 + y + height));
|
901 |
|
|
}
|
902 |
|
|
|
903 |
|
|
|
904 |
|
|
/* $History: tkCanvImg.c $
|
905 |
|
|
*
|
906 |
|
|
* ***************** Version 1 *****************
|
907 |
|
|
* User: Dtashley Date: 1/02/01 Time: 2:36a
|
908 |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base
|
909 |
|
|
* Initial check-in.
|
910 |
|
|
*/
|
911 |
|
|
|
912 |
|
|
/* End of TKCANVIMG.C */ |