1529 lines
45 KiB
C
1529 lines
45 KiB
C
/*
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* tkRectOval.c --
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*
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* This file implements rectangle and oval 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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*
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* See the file "license.terms" for information on usage and redistribution of
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* this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*/
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#include "tkInt.h"
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#include "tkCanvas.h"
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#include "default.h"
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/*
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* The structure below defines the record for each rectangle/oval item.
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*/
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typedef struct RectOvalItem {
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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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double bbox[4]; /* Coordinates of bounding box for rectangle
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* or oval (x1, y1, x2, y2). Item includes x1
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* and x2 but not y1 and y2. */
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Tk_TSOffset tsoffset;
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XColor *fillColor; /* Color for filling rectangle/oval. */
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XColor *activeFillColor; /* Color for filling rectangle/oval if state
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* is active. */
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XColor *disabledFillColor; /* Color for filling rectangle/oval if state
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* is disabled. */
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Pixmap fillStipple; /* Stipple bitmap for filling item. */
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Pixmap activeFillStipple; /* Stipple bitmap for filling item if state is
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* active. */
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Pixmap disabledFillStipple; /* Stipple bitmap for filling item if state is
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* disabled. */
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GC fillGC; /* Graphics context for filling item. */
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} RectOvalItem;
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/*
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* Information used for parsing configuration specs:
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*/
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static const Tk_CustomOption stateOption = {
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TkStateParseProc, TkStatePrintProc, INT2PTR(2)
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};
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static const Tk_CustomOption tagsOption = {
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Tk_CanvasTagsParseProc, Tk_CanvasTagsPrintProc, NULL
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};
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static const Tk_CustomOption dashOption = {
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TkCanvasDashParseProc, TkCanvasDashPrintProc, NULL
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};
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static const Tk_CustomOption offsetOption = {
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TkOffsetParseProc, TkOffsetPrintProc, INT2PTR(TK_OFFSET_RELATIVE)
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};
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static const Tk_CustomOption pixelOption = {
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TkPixelParseProc, TkPixelPrintProc, NULL
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};
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static const Tk_ConfigSpec configSpecs[] = {
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{TK_CONFIG_CUSTOM, "-activedash", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, outline.activeDash),
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TK_CONFIG_NULL_OK, &dashOption},
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{TK_CONFIG_COLOR, "-activefill", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, activeFillColor), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_COLOR, "-activeoutline", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, outline.activeColor), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_BITMAP, "-activeoutlinestipple", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, outline.activeStipple),
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TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_BITMAP, "-activestipple", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, activeFillStipple), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_CUSTOM, "-activewidth", NULL, NULL,
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"0.0", Tk_Offset(RectOvalItem, outline.activeWidth),
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TK_CONFIG_DONT_SET_DEFAULT, &pixelOption},
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{TK_CONFIG_CUSTOM, "-dash", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, outline.dash),
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TK_CONFIG_NULL_OK, &dashOption},
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{TK_CONFIG_PIXELS, "-dashoffset", NULL, NULL,
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"0", Tk_Offset(RectOvalItem, outline.offset),
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TK_CONFIG_DONT_SET_DEFAULT, NULL},
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{TK_CONFIG_CUSTOM, "-disableddash", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, outline.disabledDash),
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TK_CONFIG_NULL_OK, &dashOption},
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{TK_CONFIG_COLOR, "-disabledfill", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, disabledFillColor), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_COLOR, "-disabledoutline", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, outline.disabledColor),
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TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_BITMAP, "-disabledoutlinestipple", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, outline.disabledStipple),
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TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_BITMAP, "-disabledstipple", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, disabledFillStipple), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_PIXELS, "-disabledwidth", NULL, NULL,
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"0.0", Tk_Offset(RectOvalItem, outline.disabledWidth),
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TK_CONFIG_DONT_SET_DEFAULT, &pixelOption},
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{TK_CONFIG_COLOR, "-fill", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, fillColor), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_CUSTOM, "-offset", NULL, NULL,
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"0,0", Tk_Offset(RectOvalItem, tsoffset),
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TK_CONFIG_DONT_SET_DEFAULT, &offsetOption},
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{TK_CONFIG_COLOR, "-outline", NULL, NULL,
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DEF_CANVITEM_OUTLINE, Tk_Offset(RectOvalItem, outline.color), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_CUSTOM, "-outlineoffset", NULL, NULL,
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"0,0", Tk_Offset(RectOvalItem, outline.tsoffset),
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TK_CONFIG_DONT_SET_DEFAULT, &offsetOption},
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{TK_CONFIG_BITMAP, "-outlinestipple", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, outline.stipple), TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_CUSTOM, "-state", NULL, NULL,
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NULL, Tk_Offset(Tk_Item, state),TK_CONFIG_NULL_OK, &stateOption},
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{TK_CONFIG_BITMAP, "-stipple", NULL, NULL,
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NULL, Tk_Offset(RectOvalItem, fillStipple),TK_CONFIG_NULL_OK, NULL},
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{TK_CONFIG_CUSTOM, "-tags", NULL, NULL,
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NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
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{TK_CONFIG_CUSTOM, "-width", NULL, NULL,
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"1.0", Tk_Offset(RectOvalItem, outline.width),
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TK_CONFIG_DONT_SET_DEFAULT, &pixelOption},
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{TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0, NULL}
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};
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/*
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* Prototypes for functions defined in this file:
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*/
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static void ComputeRectOvalBbox(Tk_Canvas canvas,
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RectOvalItem *rectOvalPtr);
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static int ConfigureRectOval(Tcl_Interp *interp, Tk_Canvas canvas,
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Tk_Item *itemPtr, int objc, Tcl_Obj *const objv[],
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int flags);
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static int CreateRectOval(Tcl_Interp *interp, Tk_Canvas canvas,
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Tk_Item *itemPtr, int objc, Tcl_Obj *const objv[]);
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static void DeleteRectOval(Tk_Canvas canvas, Tk_Item *itemPtr,
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Display *display);
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static void DisplayRectOval(Tk_Canvas canvas, Tk_Item *itemPtr,
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Display *display, Drawable dst, int x, int y,
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int width, int height);
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static int OvalToArea(Tk_Canvas canvas, Tk_Item *itemPtr,
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double *areaPtr);
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static double OvalToPoint(Tk_Canvas canvas, Tk_Item *itemPtr,
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double *pointPtr);
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static int RectOvalCoords(Tcl_Interp *interp, Tk_Canvas canvas,
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Tk_Item *itemPtr, int objc, Tcl_Obj *const objv[]);
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static int RectOvalToPostscript(Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int prepass);
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static int RectToArea(Tk_Canvas canvas, Tk_Item *itemPtr,
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double *areaPtr);
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static double RectToPoint(Tk_Canvas canvas, Tk_Item *itemPtr,
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double *pointPtr);
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static void ScaleRectOval(Tk_Canvas canvas, Tk_Item *itemPtr,
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double originX, double originY,
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double scaleX, double scaleY);
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static void TranslateRectOval(Tk_Canvas canvas, Tk_Item *itemPtr,
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double deltaX, double deltaY);
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/*
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* The structures below defines the rectangle and oval item types by means of
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* functions that can be invoked by generic item code.
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*/
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Tk_ItemType tkRectangleType = {
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"rectangle", /* name */
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sizeof(RectOvalItem), /* itemSize */
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CreateRectOval, /* createProc */
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configSpecs, /* configSpecs */
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ConfigureRectOval, /* configureProc */
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RectOvalCoords, /* coordProc */
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DeleteRectOval, /* deleteProc */
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DisplayRectOval, /* displayProc */
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TK_CONFIG_OBJS, /* flags */
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RectToPoint, /* pointProc */
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RectToArea, /* areaProc */
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RectOvalToPostscript, /* postscriptProc */
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ScaleRectOval, /* scaleProc */
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TranslateRectOval, /* translateProc */
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NULL, /* indexProc */
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NULL, /* icursorProc */
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NULL, /* selectionProc */
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NULL, /* insertProc */
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NULL, /* dTextProc */
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NULL, /* nextPtr */
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NULL, 0, NULL, NULL
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};
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Tk_ItemType tkOvalType = {
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"oval", /* name */
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sizeof(RectOvalItem), /* itemSize */
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CreateRectOval, /* createProc */
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configSpecs, /* configSpecs */
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ConfigureRectOval, /* configureProc */
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RectOvalCoords, /* coordProc */
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DeleteRectOval, /* deleteProc */
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DisplayRectOval, /* displayProc */
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TK_CONFIG_OBJS, /* flags */
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OvalToPoint, /* pointProc */
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OvalToArea, /* areaProc */
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RectOvalToPostscript, /* postscriptProc */
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ScaleRectOval, /* scaleProc */
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TranslateRectOval, /* translateProc */
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NULL, /* indexProc */
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NULL, /* cursorProc */
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NULL, /* selectionProc */
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NULL, /* insertProc */
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NULL, /* dTextProc */
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NULL, /* nextPtr */
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NULL, 0, NULL, NULL
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};
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/*
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*--------------------------------------------------------------
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*
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* CreateRectOval --
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*
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* This function is invoked to create a new rectangle or oval item in a
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* canvas.
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*
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* Results:
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* A standard Tcl return value. If an error occurred in creating the
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* item, then an error message is left in the interp's result; in this
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* case itemPtr is left uninitialized, so it can be safely freed by the
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* caller.
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*
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* Side effects:
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* A new rectangle or oval 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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CreateRectOval(
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Tcl_Interp *interp, /* 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 has been
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* initialized by caller. */
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int objc, /* Number of arguments in objv. */
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Tcl_Obj *const objv[]) /* Arguments describing rectangle. */
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{
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RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
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int i;
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if (objc == 0) {
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Tcl_Panic("canvas did not pass any coords");
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}
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/*
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* Carry out initialization that is needed in order to clean up after
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* errors during the the remainder of this function.
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*/
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Tk_CreateOutline(&(rectOvalPtr->outline));
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rectOvalPtr->tsoffset.flags = 0;
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rectOvalPtr->tsoffset.xoffset = 0;
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rectOvalPtr->tsoffset.yoffset = 0;
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rectOvalPtr->fillColor = NULL;
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rectOvalPtr->activeFillColor = NULL;
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rectOvalPtr->disabledFillColor = NULL;
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rectOvalPtr->fillStipple = None;
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rectOvalPtr->activeFillStipple = None;
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rectOvalPtr->disabledFillStipple = None;
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rectOvalPtr->fillGC = NULL;
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/*
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* Process the arguments to fill in the item record.
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*/
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for (i = 1; i < objc; i++) {
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const char *arg = Tcl_GetString(objv[i]);
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if ((arg[0] == '-') && (arg[1] >= 'a') && (arg[1] <= 'z')) {
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break;
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}
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}
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if ((RectOvalCoords(interp, canvas, itemPtr, i, objv) != TCL_OK)) {
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goto error;
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}
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if (ConfigureRectOval(interp, canvas, itemPtr, objc-i, objv+i, 0)
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== TCL_OK) {
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return TCL_OK;
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}
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error:
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DeleteRectOval(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
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return TCL_ERROR;
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}
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/*
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*--------------------------------------------------------------
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*
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* RectOvalCoords --
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*
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* This function is invoked to process the "coords" widget command on
|
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* rectangles and ovals. See the user documentation for details on what
|
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* it does.
|
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*
|
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* Results:
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* Returns TCL_OK or TCL_ERROR, and sets the interp's result.
|
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*
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* Side effects:
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* The coordinates for the given item may be changed.
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*
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*--------------------------------------------------------------
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*/
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||
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static int
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RectOvalCoords(
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Tcl_Interp *interp, /* Used for error reporting. */
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Tk_Canvas canvas, /* Canvas containing item. */
|
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Tk_Item *itemPtr, /* Item whose coordinates are to be read or
|
||
* modified. */
|
||
int objc, /* Number of coordinates supplied in objv. */
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||
Tcl_Obj *const objv[]) /* Array of coordinates: x1,y1,x2,y2,... */
|
||
{
|
||
RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
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||
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/*
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* If no coordinates, return the current coordinates (i.e. bounding box).
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||
*/
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||
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if (objc == 0) {
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Tcl_Obj *bbox[4];
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||
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bbox[0] = Tcl_NewDoubleObj(rectOvalPtr->bbox[0]);
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bbox[1] = Tcl_NewDoubleObj(rectOvalPtr->bbox[1]);
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bbox[2] = Tcl_NewDoubleObj(rectOvalPtr->bbox[2]);
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bbox[3] = Tcl_NewDoubleObj(rectOvalPtr->bbox[3]);
|
||
Tcl_SetObjResult(interp, Tcl_NewListObj(4, bbox));
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return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
* If one "coordinate", treat as list of coordinates.
|
||
*/
|
||
|
||
if (objc == 1) {
|
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if (Tcl_ListObjGetElements(interp, objv[0], &objc,
|
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(Tcl_Obj ***) &objv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Better have four coordinates now. Spit out an error message otherwise.
|
||
*/
|
||
|
||
if (objc != 4) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
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"wrong # coordinates: expected 0 or 4, got %d", objc));
|
||
Tcl_SetErrorCode(interp, "TK", "CANVAS", "COORDS",
|
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(rectOvalPtr->header.typePtr == &tkRectangleType
|
||
? "RECTANGLE" : "OVAL"), NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
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* Parse the coordinates and update our bounding box.
|
||
*/
|
||
|
||
if ((Tk_CanvasGetCoordFromObj(interp, canvas, objv[0],
|
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&rectOvalPtr->bbox[0]) != TCL_OK)
|
||
|| (Tk_CanvasGetCoordFromObj(interp, canvas, objv[1],
|
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&rectOvalPtr->bbox[1]) != TCL_OK)
|
||
|| (Tk_CanvasGetCoordFromObj(interp, canvas, objv[2],
|
||
&rectOvalPtr->bbox[2]) != TCL_OK)
|
||
|| (Tk_CanvasGetCoordFromObj(interp, canvas, objv[3],
|
||
&rectOvalPtr->bbox[3]) != TCL_OK)) {
|
||
return TCL_ERROR;
|
||
}
|
||
ComputeRectOvalBbox(canvas, rectOvalPtr);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ConfigureRectOval --
|
||
*
|
||
* This function is invoked to configure various aspects of a rectangle
|
||
* or oval item, such as its border and background colors.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result code. If an error occurs, then an error message
|
||
* is left in the interp's result.
|
||
*
|
||
* Side effects:
|
||
* Configuration information, such as colors and stipple patterns, may be
|
||
* set for itemPtr.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ConfigureRectOval(
|
||
Tcl_Interp *interp, /* Used for error reporting. */
|
||
Tk_Canvas canvas, /* Canvas containing itemPtr. */
|
||
Tk_Item *itemPtr, /* Rectangle item to reconfigure. */
|
||
int objc, /* Number of elements in objv. */
|
||
Tcl_Obj *const objv[], /* Arguments describing things to configure. */
|
||
int flags) /* Flags to pass to Tk_ConfigureWidget. */
|
||
{
|
||
RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
|
||
XGCValues gcValues;
|
||
GC newGC;
|
||
unsigned long mask;
|
||
Tk_Window tkwin;
|
||
Tk_TSOffset *tsoffset;
|
||
XColor *color;
|
||
Pixmap stipple;
|
||
Tk_State state;
|
||
|
||
tkwin = Tk_CanvasTkwin(canvas);
|
||
|
||
if (TCL_OK != Tk_ConfigureWidget(interp, tkwin, configSpecs, objc,
|
||
(const char **)objv, (char *) rectOvalPtr, flags|TK_CONFIG_OBJS)) {
|
||
return TCL_ERROR;
|
||
}
|
||
state = itemPtr->state;
|
||
|
||
/*
|
||
* A few of the options require additional processing, such as graphics
|
||
* contexts.
|
||
*/
|
||
|
||
if (rectOvalPtr->outline.activeWidth > rectOvalPtr->outline.width ||
|
||
rectOvalPtr->outline.activeDash.number != 0 ||
|
||
rectOvalPtr->outline.activeColor != NULL ||
|
||
rectOvalPtr->outline.activeStipple != None ||
|
||
rectOvalPtr->activeFillColor != NULL ||
|
||
rectOvalPtr->activeFillStipple != None) {
|
||
itemPtr->redraw_flags |= TK_ITEM_STATE_DEPENDANT;
|
||
} else {
|
||
itemPtr->redraw_flags &= ~TK_ITEM_STATE_DEPENDANT;
|
||
}
|
||
|
||
tsoffset = &rectOvalPtr->outline.tsoffset;
|
||
flags = tsoffset->flags;
|
||
if (flags & TK_OFFSET_LEFT) {
|
||
tsoffset->xoffset = (int) (rectOvalPtr->bbox[0] + 0.5);
|
||
} else if (flags & TK_OFFSET_CENTER) {
|
||
tsoffset->xoffset = (int)
|
||
((rectOvalPtr->bbox[0]+rectOvalPtr->bbox[2]+1)/2);
|
||
} else if (flags & TK_OFFSET_RIGHT) {
|
||
tsoffset->xoffset = (int) (rectOvalPtr->bbox[2] + 0.5);
|
||
}
|
||
if (flags & TK_OFFSET_TOP) {
|
||
tsoffset->yoffset = (int) (rectOvalPtr->bbox[1] + 0.5);
|
||
} else if (flags & TK_OFFSET_MIDDLE) {
|
||
tsoffset->yoffset = (int)
|
||
((rectOvalPtr->bbox[1]+rectOvalPtr->bbox[3]+1)/2);
|
||
} else if (flags & TK_OFFSET_BOTTOM) {
|
||
tsoffset->yoffset = (int) (rectOvalPtr->bbox[2] + 0.5);
|
||
}
|
||
|
||
/*
|
||
* Configure the outline graphics context. If mask is non-zero, the gc has
|
||
* changed and must be reallocated, provided that the new settings specify
|
||
* a valid outline (non-zero width and non-NULL color)
|
||
*/
|
||
|
||
mask = Tk_ConfigOutlineGC(&gcValues, canvas, itemPtr,
|
||
&(rectOvalPtr->outline));
|
||
if (mask && \
|
||
rectOvalPtr->outline.width != 0 && \
|
||
rectOvalPtr->outline.color != NULL) {
|
||
gcValues.cap_style = CapProjecting;
|
||
mask |= GCCapStyle;
|
||
newGC = Tk_GetGC(tkwin, mask, &gcValues);
|
||
} else {
|
||
newGC = NULL;
|
||
}
|
||
if (rectOvalPtr->outline.gc != NULL) {
|
||
Tk_FreeGC(Tk_Display(tkwin), rectOvalPtr->outline.gc);
|
||
}
|
||
rectOvalPtr->outline.gc = newGC;
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(canvas)->canvas_state;
|
||
}
|
||
if (state == TK_STATE_HIDDEN) {
|
||
ComputeRectOvalBbox(canvas, rectOvalPtr);
|
||
return TCL_OK;
|
||
}
|
||
|
||
color = rectOvalPtr->fillColor;
|
||
stipple = rectOvalPtr->fillStipple;
|
||
if (Canvas(canvas)->currentItemPtr == itemPtr) {
|
||
if (rectOvalPtr->activeFillColor!=NULL) {
|
||
color = rectOvalPtr->activeFillColor;
|
||
}
|
||
if (rectOvalPtr->activeFillStipple!=None) {
|
||
stipple = rectOvalPtr->activeFillStipple;
|
||
}
|
||
} else if (state == TK_STATE_DISABLED) {
|
||
if (rectOvalPtr->disabledFillColor!=NULL) {
|
||
color = rectOvalPtr->disabledFillColor;
|
||
}
|
||
if (rectOvalPtr->disabledFillStipple!=None) {
|
||
stipple = rectOvalPtr->disabledFillStipple;
|
||
}
|
||
}
|
||
|
||
if (color == NULL) {
|
||
newGC = NULL;
|
||
} else {
|
||
gcValues.foreground = color->pixel;
|
||
if (stipple != None) {
|
||
gcValues.stipple = stipple;
|
||
gcValues.fill_style = FillStippled;
|
||
mask = GCForeground|GCStipple|GCFillStyle;
|
||
} else {
|
||
mask = GCForeground;
|
||
}
|
||
#ifdef MAC_OSX_TK
|
||
/*
|
||
* Mac OS X CG drawing needs access to the outline linewidth even for
|
||
* fills (as linewidth controls antialiasing).
|
||
*/
|
||
gcValues.line_width = rectOvalPtr->outline.gc != NULL ?
|
||
rectOvalPtr->outline.gc->line_width : 0;
|
||
mask |= GCLineWidth;
|
||
#endif
|
||
newGC = Tk_GetGC(tkwin, mask, &gcValues);
|
||
}
|
||
if (rectOvalPtr->fillGC != NULL) {
|
||
Tk_FreeGC(Tk_Display(tkwin), rectOvalPtr->fillGC);
|
||
}
|
||
rectOvalPtr->fillGC = newGC;
|
||
|
||
tsoffset = &rectOvalPtr->tsoffset;
|
||
flags = tsoffset->flags;
|
||
if (flags & TK_OFFSET_LEFT) {
|
||
tsoffset->xoffset = (int) (rectOvalPtr->bbox[0] + 0.5);
|
||
} else if (flags & TK_OFFSET_CENTER) {
|
||
tsoffset->xoffset = (int)
|
||
((rectOvalPtr->bbox[0]+rectOvalPtr->bbox[2]+1)/2);
|
||
} else if (flags & TK_OFFSET_RIGHT) {
|
||
tsoffset->xoffset = (int) (rectOvalPtr->bbox[2] + 0.5);
|
||
}
|
||
if (flags & TK_OFFSET_TOP) {
|
||
tsoffset->yoffset = (int) (rectOvalPtr->bbox[1] + 0.5);
|
||
} else if (flags & TK_OFFSET_MIDDLE) {
|
||
tsoffset->yoffset = (int)
|
||
((rectOvalPtr->bbox[1]+rectOvalPtr->bbox[3]+1)/2);
|
||
} else if (flags & TK_OFFSET_BOTTOM) {
|
||
tsoffset->yoffset = (int) (rectOvalPtr->bbox[3] + 0.5);
|
||
}
|
||
|
||
ComputeRectOvalBbox(canvas, rectOvalPtr);
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* DeleteRectOval --
|
||
*
|
||
* This function is called to clean up the data structure associated with
|
||
* a rectangle or oval item.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Resources associated with itemPtr are released.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DeleteRectOval(
|
||
Tk_Canvas canvas, /* Info about overall widget. */
|
||
Tk_Item *itemPtr, /* Item that is being deleted. */
|
||
Display *display) /* Display containing window for canvas. */
|
||
{
|
||
RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
|
||
|
||
Tk_DeleteOutline(display, &(rectOvalPtr->outline));
|
||
if (rectOvalPtr->fillColor != NULL) {
|
||
Tk_FreeColor(rectOvalPtr->fillColor);
|
||
}
|
||
if (rectOvalPtr->activeFillColor != NULL) {
|
||
Tk_FreeColor(rectOvalPtr->activeFillColor);
|
||
}
|
||
if (rectOvalPtr->disabledFillColor != NULL) {
|
||
Tk_FreeColor(rectOvalPtr->disabledFillColor);
|
||
}
|
||
if (rectOvalPtr->fillStipple != None) {
|
||
Tk_FreeBitmap(display, rectOvalPtr->fillStipple);
|
||
}
|
||
if (rectOvalPtr->activeFillStipple != None) {
|
||
Tk_FreeBitmap(display, rectOvalPtr->activeFillStipple);
|
||
}
|
||
if (rectOvalPtr->disabledFillStipple != None) {
|
||
Tk_FreeBitmap(display, rectOvalPtr->disabledFillStipple);
|
||
}
|
||
if (rectOvalPtr->fillGC != NULL) {
|
||
Tk_FreeGC(display, rectOvalPtr->fillGC);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ComputeRectOvalBbox --
|
||
*
|
||
* This function is invoked to compute the bounding box of all the pixels
|
||
* that may be drawn as part of a rectangle or oval.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The fields x1, y1, x2, and y2 are updated in the header for itemPtr.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
ComputeRectOvalBbox(
|
||
Tk_Canvas canvas, /* Canvas that contains item. */
|
||
RectOvalItem *rectOvalPtr) /* Item whose bbox is to be recomputed. */
|
||
{
|
||
int bloat, tmp;
|
||
double dtmp, width;
|
||
Tk_State state = rectOvalPtr->header.state;
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(canvas)->canvas_state;
|
||
}
|
||
|
||
width = rectOvalPtr->outline.width;
|
||
if (state == TK_STATE_HIDDEN) {
|
||
rectOvalPtr->header.x1 = rectOvalPtr->header.y1 =
|
||
rectOvalPtr->header.x2 = rectOvalPtr->header.y2 = -1;
|
||
return;
|
||
}
|
||
if (Canvas(canvas)->currentItemPtr == (Tk_Item *) rectOvalPtr) {
|
||
if (rectOvalPtr->outline.activeWidth>width) {
|
||
width = rectOvalPtr->outline.activeWidth;
|
||
}
|
||
} else if (state == TK_STATE_DISABLED) {
|
||
if (rectOvalPtr->outline.disabledWidth>0) {
|
||
width = rectOvalPtr->outline.disabledWidth;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Make sure that the first coordinates are the lowest ones.
|
||
*/
|
||
|
||
if (rectOvalPtr->bbox[1] > rectOvalPtr->bbox[3]) {
|
||
double tmpY = rectOvalPtr->bbox[3];
|
||
|
||
rectOvalPtr->bbox[3] = rectOvalPtr->bbox[1];
|
||
rectOvalPtr->bbox[1] = tmpY;
|
||
}
|
||
if (rectOvalPtr->bbox[0] > rectOvalPtr->bbox[2]) {
|
||
double tmpX = rectOvalPtr->bbox[2];
|
||
|
||
rectOvalPtr->bbox[2] = rectOvalPtr->bbox[0];
|
||
rectOvalPtr->bbox[0] = tmpX;
|
||
}
|
||
|
||
if (rectOvalPtr->outline.gc == NULL) {
|
||
/*
|
||
* The Win32 switch was added for 8.3 to solve a problem with ovals
|
||
* leaving traces on bottom and right of 1 pixel. This may not be the
|
||
* correct place to solve it, but it works.
|
||
*/
|
||
|
||
#ifdef _WIN32
|
||
bloat = 1;
|
||
#else
|
||
bloat = 0;
|
||
#endif /* _WIN32 */
|
||
} else {
|
||
#ifdef MAC_OSX_TK
|
||
/*
|
||
* Mac OS X CoreGraphics needs correct rounding here otherwise it will
|
||
* draw outside the bounding box. Probably correct on other platforms
|
||
* as well?
|
||
*/
|
||
|
||
bloat = (int) (width+1.5)/2;
|
||
#else
|
||
bloat = (int) (width+1)/2;
|
||
#endif /* MAC_OSX_TK */
|
||
}
|
||
|
||
/*
|
||
* Special note: the rectangle is always drawn at least 1x1 in size, so
|
||
* round up the upper coordinates to be at least 1 unit greater than the
|
||
* lower ones.
|
||
*/
|
||
|
||
tmp = (int) ((rectOvalPtr->bbox[0] >= 0) ? rectOvalPtr->bbox[0] + .5
|
||
: rectOvalPtr->bbox[0] - .5);
|
||
rectOvalPtr->header.x1 = tmp - bloat;
|
||
tmp = (int) ((rectOvalPtr->bbox[1] >= 0) ? rectOvalPtr->bbox[1] + .5
|
||
: rectOvalPtr->bbox[1] - .5);
|
||
rectOvalPtr->header.y1 = tmp - bloat;
|
||
dtmp = rectOvalPtr->bbox[2];
|
||
if (dtmp < (rectOvalPtr->bbox[0] + 1)) {
|
||
dtmp = rectOvalPtr->bbox[0] + 1;
|
||
}
|
||
tmp = (int) ((dtmp >= 0) ? dtmp + .5 : dtmp - .5);
|
||
rectOvalPtr->header.x2 = tmp + bloat;
|
||
dtmp = rectOvalPtr->bbox[3];
|
||
if (dtmp < (rectOvalPtr->bbox[1] + 1)) {
|
||
dtmp = rectOvalPtr->bbox[1] + 1;
|
||
}
|
||
tmp = (int) ((dtmp >= 0) ? dtmp + .5 : dtmp - .5);
|
||
rectOvalPtr->header.y2 = tmp + bloat;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* DisplayRectOval --
|
||
*
|
||
* This function is invoked to draw a rectangle or oval item in a given
|
||
* drawable.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* ItemPtr is drawn in drawable using the transformation information in
|
||
* canvas.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisplayRectOval(
|
||
Tk_Canvas canvas, /* Canvas that contains item. */
|
||
Tk_Item *itemPtr, /* Item to be displayed. */
|
||
Display *display, /* Display on which to draw item. */
|
||
Drawable drawable, /* Pixmap or window in which to draw item. */
|
||
int x, int y, int width, int height)
|
||
/* Describes region of canvas that must be
|
||
* redisplayed (not used). */
|
||
{
|
||
RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
|
||
short x1, y1, x2, y2;
|
||
Pixmap fillStipple;
|
||
Tk_State state = itemPtr->state;
|
||
|
||
/*
|
||
* Compute the screen coordinates of the bounding box for the item. Make
|
||
* sure that the bbox is at least one pixel large, since some X servers
|
||
* will die if it isn't.
|
||
*/
|
||
|
||
Tk_CanvasDrawableCoords(canvas, rectOvalPtr->bbox[0],rectOvalPtr->bbox[1],
|
||
&x1, &y1);
|
||
Tk_CanvasDrawableCoords(canvas, rectOvalPtr->bbox[2],rectOvalPtr->bbox[3],
|
||
&x2, &y2);
|
||
if (x2 == x1) {
|
||
|
||
/*
|
||
* The width of the bounding box corresponds to less than one pixel
|
||
* on screen. Adjustment is needed to avoid drawing attempts with zero
|
||
* width items (which would draw nothing). The bounding box spans
|
||
* either 1 or 2 pixels. Select which pixel will be drawn.
|
||
*/
|
||
|
||
short ix1 = (short) (rectOvalPtr->bbox[0]);
|
||
short ix2 = (short) (rectOvalPtr->bbox[2]);
|
||
|
||
if (ix1 == ix2) {
|
||
|
||
/*
|
||
* x1 and x2 are "within the same pixel". Use this pixel.
|
||
* Note: the degenerated case (bbox[0]==bbox[2]) of a completely
|
||
* flat box results in arbitrary selection of the pixel at the
|
||
* right (with positive coordinate) or left (with negative
|
||
* coordinate) of the box. There is no "best choice" here.
|
||
*/
|
||
|
||
if (ix1 > 0) {
|
||
x2 += 1;
|
||
} else {
|
||
x1 -= 1;
|
||
}
|
||
} else {
|
||
|
||
/*
|
||
* (x1,x2) span two pixels. Select the one with the larger
|
||
* covered "area".
|
||
*/
|
||
|
||
if (ix1 > 0) {
|
||
if ((rectOvalPtr->bbox[2] - ix2) > (ix2 - rectOvalPtr->bbox[0])) {
|
||
x2 += 1;
|
||
} else {
|
||
x1 -= 1;
|
||
}
|
||
} else {
|
||
if ((rectOvalPtr->bbox[2] - ix1) > (ix1 - rectOvalPtr->bbox[0])) {
|
||
x2 += 1;
|
||
} else {
|
||
x1 -= 1;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if (y2 == y1) {
|
||
|
||
/*
|
||
* The height of the bounding box corresponds to less than one pixel
|
||
* on screen. Adjustment is needed to avoid drawing attempts with zero
|
||
* height items (which would draw nothing). The bounding box spans
|
||
* either 1 or 2 pixels. Select which pixel will be drawn.
|
||
*/
|
||
|
||
short iy1 = (short) (rectOvalPtr->bbox[1]);
|
||
short iy2 = (short) (rectOvalPtr->bbox[3]);
|
||
|
||
if (iy1 == iy2) {
|
||
|
||
/*
|
||
* y1 and y2 are "within the same pixel". Use this pixel.
|
||
* Note: the degenerated case (bbox[1]==bbox[3]) of a completely
|
||
* flat box results in arbitrary selection of the pixel below
|
||
* (with positive coordinate) or above (with negative coordinate)
|
||
* the box. There is no "best choice" here.
|
||
*/
|
||
|
||
if (iy1 > 0) {
|
||
y2 += 1;
|
||
} else {
|
||
y1 -= 1;
|
||
}
|
||
} else {
|
||
|
||
/*
|
||
* (y1,y2) span two pixels. Select the one with the larger
|
||
* covered "area".
|
||
*/
|
||
|
||
if (iy1 > 0) {
|
||
if ((rectOvalPtr->bbox[3] - iy2) > (iy2 - rectOvalPtr->bbox[1])) {
|
||
y2 += 1;
|
||
} else {
|
||
y1 -= 1;
|
||
}
|
||
} else {
|
||
if ((rectOvalPtr->bbox[3] - iy1) > (iy1 - rectOvalPtr->bbox[1])) {
|
||
y2 += 1;
|
||
} else {
|
||
y1 -= 1;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Display filled part first (if wanted), then outline. If we're
|
||
* stippling, then modify the stipple offset in the GC. Be sure to reset
|
||
* the offset when done, since the GC is supposed to be read-only.
|
||
*/
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(canvas)->canvas_state;
|
||
}
|
||
fillStipple = rectOvalPtr->fillStipple;
|
||
if (Canvas(canvas)->currentItemPtr == (Tk_Item *) rectOvalPtr) {
|
||
if (rectOvalPtr->activeFillStipple != None) {
|
||
fillStipple = rectOvalPtr->activeFillStipple;
|
||
}
|
||
} else if (state == TK_STATE_DISABLED) {
|
||
if (rectOvalPtr->disabledFillStipple != None) {
|
||
fillStipple = rectOvalPtr->disabledFillStipple;
|
||
}
|
||
}
|
||
|
||
if (rectOvalPtr->fillGC != NULL) {
|
||
if (fillStipple != None) {
|
||
Tk_TSOffset *tsoffset;
|
||
int w = 0, h = 0;
|
||
|
||
tsoffset = &rectOvalPtr->tsoffset;
|
||
if (tsoffset) {
|
||
int flags = tsoffset->flags;
|
||
|
||
if (flags & (TK_OFFSET_CENTER|TK_OFFSET_MIDDLE)) {
|
||
Tk_SizeOfBitmap(display, fillStipple, &w, &h);
|
||
if (flags & TK_OFFSET_CENTER) {
|
||
w /= 2;
|
||
} else {
|
||
w = 0;
|
||
}
|
||
if (flags & TK_OFFSET_MIDDLE) {
|
||
h /= 2;
|
||
} else {
|
||
h = 0;
|
||
}
|
||
}
|
||
tsoffset->xoffset -= w;
|
||
tsoffset->yoffset -= h;
|
||
}
|
||
Tk_CanvasSetOffset(canvas, rectOvalPtr->fillGC, tsoffset);
|
||
if (tsoffset) {
|
||
tsoffset->xoffset += w;
|
||
tsoffset->yoffset += h;
|
||
}
|
||
}
|
||
if (rectOvalPtr->header.typePtr == &tkRectangleType) {
|
||
XFillRectangle(display, drawable, rectOvalPtr->fillGC,
|
||
x1, y1, (unsigned int) (x2-x1), (unsigned int) (y2-y1));
|
||
} else {
|
||
XFillArc(display, drawable, rectOvalPtr->fillGC,
|
||
x1, y1, (unsigned) (x2-x1), (unsigned) (y2-y1),
|
||
0, 360*64);
|
||
}
|
||
if (fillStipple != None) {
|
||
XSetTSOrigin(display, rectOvalPtr->fillGC, 0, 0);
|
||
}
|
||
}
|
||
|
||
if (rectOvalPtr->outline.gc != NULL) {
|
||
Tk_ChangeOutlineGC(canvas, itemPtr, &(rectOvalPtr->outline));
|
||
if (rectOvalPtr->header.typePtr == &tkRectangleType) {
|
||
XDrawRectangle(display, drawable, rectOvalPtr->outline.gc,
|
||
x1, y1, (unsigned) (x2-x1), (unsigned) (y2-y1));
|
||
} else {
|
||
XDrawArc(display, drawable, rectOvalPtr->outline.gc,
|
||
x1, y1, (unsigned) (x2-x1), (unsigned) (y2-y1), 0, 360*64);
|
||
}
|
||
Tk_ResetOutlineGC(canvas, itemPtr, &(rectOvalPtr->outline));
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* RectToPoint --
|
||
*
|
||
* Computes the distance from a given point to a given rectangle, in
|
||
* canvas units.
|
||
*
|
||
* Results:
|
||
* The return value is 0 if the point whose x and y coordinates are
|
||
* coordPtr[0] and coordPtr[1] is inside the rectangle. If the point
|
||
* isn't inside the rectangle then the return value is the distance from
|
||
* the point to the rectangle. If itemPtr is filled, then anywhere in the
|
||
* interior is considered "inside"; if itemPtr isn't filled, then
|
||
* "inside" means only the area occupied by the outline.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static double
|
||
RectToPoint(
|
||
Tk_Canvas canvas, /* Canvas containing item. */
|
||
Tk_Item *itemPtr, /* Item to check against point. */
|
||
double *pointPtr) /* Pointer to x and y coordinates. */
|
||
{
|
||
RectOvalItem *rectPtr = (RectOvalItem *) itemPtr;
|
||
double xDiff, yDiff, x1, y1, x2, y2, inc, tmp;
|
||
double width;
|
||
Tk_State state = itemPtr->state;
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(canvas)->canvas_state;
|
||
}
|
||
|
||
width = rectPtr->outline.width;
|
||
if (Canvas(canvas)->currentItemPtr == itemPtr) {
|
||
if (rectPtr->outline.activeWidth>width) {
|
||
width = rectPtr->outline.activeWidth;
|
||
}
|
||
} else if (state == TK_STATE_DISABLED) {
|
||
if (rectPtr->outline.disabledWidth>0) {
|
||
width = rectPtr->outline.disabledWidth;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Generate a new larger rectangle that includes the border width, if
|
||
* there is one.
|
||
*/
|
||
|
||
x1 = rectPtr->bbox[0];
|
||
y1 = rectPtr->bbox[1];
|
||
x2 = rectPtr->bbox[2];
|
||
y2 = rectPtr->bbox[3];
|
||
if (rectPtr->outline.gc != NULL) {
|
||
inc = width/2.0;
|
||
x1 -= inc;
|
||
y1 -= inc;
|
||
x2 += inc;
|
||
y2 += inc;
|
||
}
|
||
|
||
/*
|
||
* If the point is inside the rectangle, handle specially: distance is 0
|
||
* if rectangle is filled, otherwise compute distance to nearest edge of
|
||
* rectangle and subtract width of edge.
|
||
*/
|
||
|
||
if ((pointPtr[0] >= x1) && (pointPtr[0] < x2)
|
||
&& (pointPtr[1] >= y1) && (pointPtr[1] < y2)) {
|
||
if ((rectPtr->fillGC != NULL) || (rectPtr->outline.gc == NULL)) {
|
||
return 0.0;
|
||
}
|
||
xDiff = pointPtr[0] - x1;
|
||
tmp = x2 - pointPtr[0];
|
||
if (tmp < xDiff) {
|
||
xDiff = tmp;
|
||
}
|
||
yDiff = pointPtr[1] - y1;
|
||
tmp = y2 - pointPtr[1];
|
||
if (tmp < yDiff) {
|
||
yDiff = tmp;
|
||
}
|
||
if (yDiff < xDiff) {
|
||
xDiff = yDiff;
|
||
}
|
||
xDiff -= width;
|
||
if (xDiff < 0.0) {
|
||
return 0.0;
|
||
}
|
||
return xDiff;
|
||
}
|
||
|
||
/*
|
||
* Point is outside rectangle.
|
||
*/
|
||
|
||
if (pointPtr[0] < x1) {
|
||
xDiff = x1 - pointPtr[0];
|
||
} else if (pointPtr[0] > x2) {
|
||
xDiff = pointPtr[0] - x2;
|
||
} else {
|
||
xDiff = 0;
|
||
}
|
||
|
||
if (pointPtr[1] < y1) {
|
||
yDiff = y1 - pointPtr[1];
|
||
} else if (pointPtr[1] > y2) {
|
||
yDiff = pointPtr[1] - y2;
|
||
} else {
|
||
yDiff = 0;
|
||
}
|
||
|
||
return hypot(xDiff, yDiff);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* OvalToPoint --
|
||
*
|
||
* Computes the distance from a given point to a given oval, in canvas
|
||
* units.
|
||
*
|
||
* Results:
|
||
* The return value is 0 if the point whose x and y coordinates are
|
||
* coordPtr[0] and coordPtr[1] is inside the oval. If the point isn't
|
||
* inside the oval then the return value is the distance from the point
|
||
* to the oval. If itemPtr is filled, then anywhere in the interior is
|
||
* considered "inside"; if itemPtr isn't filled, then "inside" means only
|
||
* the area occupied by the outline.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static double
|
||
OvalToPoint(
|
||
Tk_Canvas canvas, /* Canvas containing item. */
|
||
Tk_Item *itemPtr, /* Item to check against point. */
|
||
double *pointPtr) /* Pointer to x and y coordinates. */
|
||
{
|
||
RectOvalItem *ovalPtr = (RectOvalItem *) itemPtr;
|
||
double width;
|
||
int filled;
|
||
Tk_State state = itemPtr->state;
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(canvas)->canvas_state;
|
||
}
|
||
|
||
width = (double) ovalPtr->outline.width;
|
||
if (Canvas(canvas)->currentItemPtr == itemPtr) {
|
||
if (ovalPtr->outline.activeWidth>width) {
|
||
width = (double) ovalPtr->outline.activeWidth;
|
||
}
|
||
} else if (state == TK_STATE_DISABLED) {
|
||
if (ovalPtr->outline.disabledWidth>0) {
|
||
width = (double) ovalPtr->outline.disabledWidth;
|
||
}
|
||
}
|
||
|
||
|
||
filled = ovalPtr->fillGC != NULL;
|
||
if (ovalPtr->outline.gc == NULL) {
|
||
width = 0.0;
|
||
filled = 1;
|
||
}
|
||
return TkOvalToPoint(ovalPtr->bbox, width, filled, pointPtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* RectToArea --
|
||
*
|
||
* This function is called to determine whether an item lies entirely
|
||
* inside, entirely outside, or overlapping a given rectangle.
|
||
*
|
||
* Results:
|
||
* -1 is returned if the item is entirely outside the area given by
|
||
* rectPtr, 0 if it overlaps, and 1 if it is entirely inside the given
|
||
* area.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static int
|
||
RectToArea(
|
||
Tk_Canvas canvas, /* Canvas containing item. */
|
||
Tk_Item *itemPtr, /* Item to check against rectangle. */
|
||
double *areaPtr) /* Pointer to array of four coordinates (x1,
|
||
* y1, x2, y2) describing rectangular area. */
|
||
{
|
||
RectOvalItem *rectPtr = (RectOvalItem *) itemPtr;
|
||
double halfWidth;
|
||
double width;
|
||
Tk_State state = itemPtr->state;
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(canvas)->canvas_state;
|
||
}
|
||
|
||
width = rectPtr->outline.width;
|
||
if (Canvas(canvas)->currentItemPtr == itemPtr) {
|
||
if (rectPtr->outline.activeWidth > width) {
|
||
width = rectPtr->outline.activeWidth;
|
||
}
|
||
} else if (state == TK_STATE_DISABLED) {
|
||
if (rectPtr->outline.disabledWidth > 0) {
|
||
width = rectPtr->outline.disabledWidth;
|
||
}
|
||
}
|
||
|
||
halfWidth = width/2.0;
|
||
if (rectPtr->outline.gc == NULL) {
|
||
halfWidth = 0.0;
|
||
}
|
||
|
||
if ((areaPtr[2] <= (rectPtr->bbox[0] - halfWidth))
|
||
|| (areaPtr[0] >= (rectPtr->bbox[2] + halfWidth))
|
||
|| (areaPtr[3] <= (rectPtr->bbox[1] - halfWidth))
|
||
|| (areaPtr[1] >= (rectPtr->bbox[3] + halfWidth))) {
|
||
return -1;
|
||
}
|
||
if ((rectPtr->fillGC == NULL) && (rectPtr->outline.gc != NULL)
|
||
&& (areaPtr[0] >= (rectPtr->bbox[0] + halfWidth))
|
||
&& (areaPtr[1] >= (rectPtr->bbox[1] + halfWidth))
|
||
&& (areaPtr[2] <= (rectPtr->bbox[2] - halfWidth))
|
||
&& (areaPtr[3] <= (rectPtr->bbox[3] - halfWidth))) {
|
||
return -1;
|
||
}
|
||
if ((areaPtr[0] <= (rectPtr->bbox[0] - halfWidth))
|
||
&& (areaPtr[1] <= (rectPtr->bbox[1] - halfWidth))
|
||
&& (areaPtr[2] >= (rectPtr->bbox[2] + halfWidth))
|
||
&& (areaPtr[3] >= (rectPtr->bbox[3] + halfWidth))) {
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* OvalToArea --
|
||
*
|
||
* This function is called to determine whether an item lies entirely
|
||
* inside, entirely outside, or overlapping a given rectangular area.
|
||
*
|
||
* Results:
|
||
* -1 is returned if the item is entirely outside the area given by
|
||
* rectPtr, 0 if it overlaps, and 1 if it is entirely inside the given
|
||
* area.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static int
|
||
OvalToArea(
|
||
Tk_Canvas canvas, /* Canvas containing item. */
|
||
Tk_Item *itemPtr, /* Item to check against oval. */
|
||
double *areaPtr) /* Pointer to array of four coordinates (x1,
|
||
* y1, x2, y2) describing rectangular area. */
|
||
{
|
||
RectOvalItem *ovalPtr = (RectOvalItem *) itemPtr;
|
||
double oval[4], halfWidth, width;
|
||
int result;
|
||
Tk_State state = itemPtr->state;
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(canvas)->canvas_state;
|
||
}
|
||
|
||
width = ovalPtr->outline.width;
|
||
if (Canvas(canvas)->currentItemPtr == itemPtr) {
|
||
if (ovalPtr->outline.activeWidth > width) {
|
||
width = ovalPtr->outline.activeWidth;
|
||
}
|
||
} else if (state == TK_STATE_DISABLED) {
|
||
if (ovalPtr->outline.disabledWidth > 0) {
|
||
width = ovalPtr->outline.disabledWidth;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Expand the oval to include the width of the outline, if any.
|
||
*/
|
||
|
||
halfWidth = width/2.0;
|
||
if (ovalPtr->outline.gc == NULL) {
|
||
halfWidth = 0.0;
|
||
}
|
||
oval[0] = ovalPtr->bbox[0] - halfWidth;
|
||
oval[1] = ovalPtr->bbox[1] - halfWidth;
|
||
oval[2] = ovalPtr->bbox[2] + halfWidth;
|
||
oval[3] = ovalPtr->bbox[3] + halfWidth;
|
||
|
||
result = TkOvalToArea(oval, areaPtr);
|
||
|
||
/*
|
||
* If the rectangle appears to overlap the oval and the oval isn't filled,
|
||
* do one more check to see if perhaps all four of the rectangle's corners
|
||
* are totally inside the oval's unfilled center, in which case we should
|
||
* return "outside".
|
||
*/
|
||
|
||
if ((result == 0) && (ovalPtr->outline.gc != NULL)
|
||
&& (ovalPtr->fillGC == NULL)) {
|
||
double centerX, centerY, height;
|
||
double xDelta1, yDelta1, xDelta2, yDelta2;
|
||
|
||
centerX = (ovalPtr->bbox[0] + ovalPtr->bbox[2])/2.0;
|
||
centerY = (ovalPtr->bbox[1] + ovalPtr->bbox[3])/2.0;
|
||
width = (ovalPtr->bbox[2] - ovalPtr->bbox[0])/2.0 - halfWidth;
|
||
height = (ovalPtr->bbox[3] - ovalPtr->bbox[1])/2.0 - halfWidth;
|
||
xDelta1 = (areaPtr[0] - centerX)/width;
|
||
xDelta1 *= xDelta1;
|
||
yDelta1 = (areaPtr[1] - centerY)/height;
|
||
yDelta1 *= yDelta1;
|
||
xDelta2 = (areaPtr[2] - centerX)/width;
|
||
xDelta2 *= xDelta2;
|
||
yDelta2 = (areaPtr[3] - centerY)/height;
|
||
yDelta2 *= yDelta2;
|
||
if (((xDelta1 + yDelta1) < 1.0)
|
||
&& ((xDelta1 + yDelta2) < 1.0)
|
||
&& ((xDelta2 + yDelta1) < 1.0)
|
||
&& ((xDelta2 + yDelta2) < 1.0)) {
|
||
return -1;
|
||
}
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ScaleRectOval --
|
||
*
|
||
* This function is invoked to rescale a rectangle or oval item.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The rectangle or oval referred to by itemPtr is rescaled so that the
|
||
* following transformation is applied to all point coordinates:
|
||
* x' = originX + scaleX*(x-originX)
|
||
* y' = originY + scaleY*(y-originY)
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ScaleRectOval(
|
||
Tk_Canvas canvas, /* Canvas containing rectangle. */
|
||
Tk_Item *itemPtr, /* Rectangle to be scaled. */
|
||
double originX, double originY,
|
||
/* Origin about which to scale rect. */
|
||
double scaleX, /* Amount to scale in X direction. */
|
||
double scaleY) /* Amount to scale in Y direction. */
|
||
{
|
||
RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
|
||
|
||
rectOvalPtr->bbox[0] = originX + scaleX*(rectOvalPtr->bbox[0] - originX);
|
||
rectOvalPtr->bbox[1] = originY + scaleY*(rectOvalPtr->bbox[1] - originY);
|
||
rectOvalPtr->bbox[2] = originX + scaleX*(rectOvalPtr->bbox[2] - originX);
|
||
rectOvalPtr->bbox[3] = originY + scaleY*(rectOvalPtr->bbox[3] - originY);
|
||
ComputeRectOvalBbox(canvas, rectOvalPtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TranslateRectOval --
|
||
*
|
||
* This function is called to move a rectangle or oval by a given amount.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The position of the rectangle or oval is offset by (xDelta, yDelta),
|
||
* and the bounding box is updated in the generic part of the item
|
||
* structure.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
TranslateRectOval(
|
||
Tk_Canvas canvas, /* Canvas containing item. */
|
||
Tk_Item *itemPtr, /* Item that is being moved. */
|
||
double deltaX, double deltaY)
|
||
/* Amount by which item is to be moved. */
|
||
{
|
||
RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
|
||
|
||
rectOvalPtr->bbox[0] += deltaX;
|
||
rectOvalPtr->bbox[1] += deltaY;
|
||
rectOvalPtr->bbox[2] += deltaX;
|
||
rectOvalPtr->bbox[3] += deltaY;
|
||
ComputeRectOvalBbox(canvas, rectOvalPtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* RectOvalToPostscript --
|
||
*
|
||
* This function is called to generate Postscript for rectangle and oval
|
||
* items.
|
||
*
|
||
* Results:
|
||
* The return value is a standard Tcl result. If an error occurs in
|
||
* generating Postscript then an error message is left in the interp's
|
||
* result, replacing whatever used to be there. If no error occurs, then
|
||
* Postscript for the rectangle is appended to the result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
RectOvalToPostscript(
|
||
Tcl_Interp *interp, /* Interpreter for error reporting. */
|
||
Tk_Canvas canvas, /* Information about overall canvas. */
|
||
Tk_Item *itemPtr, /* Item for which Postscript is wanted. */
|
||
int prepass) /* 1 means this is a prepass to collect font
|
||
* information; 0 means final Postscript is
|
||
* being created. */
|
||
{
|
||
Tcl_Obj *pathObj, *psObj;
|
||
RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
|
||
double y1, y2;
|
||
XColor *color;
|
||
XColor *fillColor;
|
||
Pixmap fillStipple;
|
||
Tk_State state = itemPtr->state;
|
||
Tcl_InterpState interpState;
|
||
|
||
y1 = Tk_CanvasPsY(canvas, rectOvalPtr->bbox[1]);
|
||
y2 = Tk_CanvasPsY(canvas, rectOvalPtr->bbox[3]);
|
||
|
||
/*
|
||
* Generate a string that creates a path for the rectangle or oval. This
|
||
* is the only part of the function's code that is type-specific.
|
||
*/
|
||
|
||
if (rectOvalPtr->header.typePtr == &tkRectangleType) {
|
||
pathObj = Tcl_ObjPrintf(
|
||
"%.15g %.15g moveto "
|
||
"%.15g 0 rlineto "
|
||
"0 %.15g rlineto "
|
||
"%.15g 0 rlineto "
|
||
"closepath\n",
|
||
rectOvalPtr->bbox[0], y1,
|
||
rectOvalPtr->bbox[2]-rectOvalPtr->bbox[0],
|
||
y2-y1,
|
||
rectOvalPtr->bbox[0]-rectOvalPtr->bbox[2]);
|
||
} else {
|
||
pathObj = Tcl_ObjPrintf(
|
||
"matrix currentmatrix\n"
|
||
"%.15g %.15g translate "
|
||
"%.15g %.15g scale "
|
||
"1 0 moveto 0 0 1 0 360 arc\n"
|
||
"setmatrix\n",
|
||
(rectOvalPtr->bbox[0] + rectOvalPtr->bbox[2])/2, (y1 + y2)/2,
|
||
(rectOvalPtr->bbox[2] - rectOvalPtr->bbox[0])/2, (y1 - y2)/2);
|
||
}
|
||
|
||
if (state == TK_STATE_NULL) {
|
||
state = Canvas(canvas)->canvas_state;
|
||
}
|
||
color = rectOvalPtr->outline.color;
|
||
fillColor = rectOvalPtr->fillColor;
|
||
fillStipple = rectOvalPtr->fillStipple;
|
||
if (Canvas(canvas)->currentItemPtr == itemPtr) {
|
||
if (rectOvalPtr->outline.activeColor!=NULL) {
|
||
color = rectOvalPtr->outline.activeColor;
|
||
}
|
||
if (rectOvalPtr->activeFillColor!=NULL) {
|
||
fillColor = rectOvalPtr->activeFillColor;
|
||
}
|
||
if (rectOvalPtr->activeFillStipple!=None) {
|
||
fillStipple = rectOvalPtr->activeFillStipple;
|
||
}
|
||
} else if (state == TK_STATE_DISABLED) {
|
||
if (rectOvalPtr->outline.disabledColor!=NULL) {
|
||
color = rectOvalPtr->outline.disabledColor;
|
||
}
|
||
if (rectOvalPtr->disabledFillColor!=NULL) {
|
||
fillColor = rectOvalPtr->disabledFillColor;
|
||
}
|
||
if (rectOvalPtr->disabledFillStipple!=None) {
|
||
fillStipple = rectOvalPtr->disabledFillStipple;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Make our working space.
|
||
*/
|
||
|
||
psObj = Tcl_NewObj();
|
||
interpState = Tcl_SaveInterpState(interp, TCL_OK);
|
||
|
||
/*
|
||
* First draw the filled area of the rectangle.
|
||
*/
|
||
|
||
if (fillColor != NULL) {
|
||
Tcl_AppendObjToObj(psObj, pathObj);
|
||
|
||
Tcl_ResetResult(interp);
|
||
if (Tk_CanvasPsColor(interp, canvas, fillColor) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp));
|
||
|
||
if (fillStipple != None) {
|
||
Tcl_AppendToObj(psObj, "clip ", -1);
|
||
|
||
Tcl_ResetResult(interp);
|
||
if (Tk_CanvasPsStipple(interp, canvas, fillStipple) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp));
|
||
if (color != NULL) {
|
||
Tcl_AppendToObj(psObj, "grestore gsave\n", -1);
|
||
}
|
||
} else {
|
||
Tcl_AppendToObj(psObj, "fill\n", -1);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Now draw the outline, if there is one.
|
||
*/
|
||
|
||
if (color != NULL) {
|
||
Tcl_AppendObjToObj(psObj, pathObj);
|
||
Tcl_AppendToObj(psObj, "0 setlinejoin 2 setlinecap\n", -1);
|
||
|
||
Tcl_ResetResult(interp);
|
||
if (Tk_CanvasPsOutline(canvas, itemPtr,
|
||
&rectOvalPtr->outline)!= TCL_OK) {
|
||
goto error;
|
||
}
|
||
Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp));
|
||
}
|
||
|
||
/*
|
||
* Plug the accumulated postscript back into the result.
|
||
*/
|
||
|
||
(void) Tcl_RestoreInterpState(interp, interpState);
|
||
Tcl_AppendObjToObj(Tcl_GetObjResult(interp), psObj);
|
||
Tcl_DecrRefCount(psObj);
|
||
Tcl_DecrRefCount(pathObj);
|
||
return TCL_OK;
|
||
|
||
error:
|
||
Tcl_DiscardInterpState(interpState);
|
||
Tcl_DecrRefCount(psObj);
|
||
Tcl_DecrRefCount(pathObj);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Local Variables:
|
||
* mode: c
|
||
* c-basic-offset: 4
|
||
* fill-column: 78
|
||
* End:
|
||
*/
|