tkRectOval.c
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上传日期:2015-12-11
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- /*
- * tkRectOval.c --
- *
- * This file implements rectangle and oval items for canvas
- * widgets.
- *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tkRectOval.c,v 1.10.2.2 2006/10/16 15:35:50 das Exp $
- */
- #include <stdio.h>
- #include "tk.h"
- #include "tkInt.h"
- #include "tkPort.h"
- #include "tkCanvas.h"
- /*
- * The structure below defines the record for each rectangle/oval item.
- */
- typedef struct RectOvalItem {
- Tk_Item header; /* Generic stuff that's the same for all
- * types. MUST BE FIRST IN STRUCTURE. */
- Tk_Outline outline; /* Outline structure */
- double bbox[4]; /* Coordinates of bounding box for rectangle
- * or oval (x1, y1, x2, y2). Item includes
- * x1 and x2 but not y1 and y2. */
- Tk_TSOffset tsoffset;
- XColor *fillColor; /* Color for filling rectangle/oval. */
- XColor *activeFillColor; /* Color for filling rectangle/oval if state is active. */
- XColor *disabledFillColor; /* Color for filling rectangle/oval if state is disabled. */
- Pixmap fillStipple; /* Stipple bitmap for filling item. */
- Pixmap activeFillStipple; /* Stipple bitmap for filling item if state is active. */
- Pixmap disabledFillStipple; /* Stipple bitmap for filling item if state is disabled. */
- GC fillGC; /* Graphics context for filling item. */
- } RectOvalItem;
- /*
- * Information used for parsing configuration specs:
- */
- static Tk_CustomOption stateOption = {
- (Tk_OptionParseProc *) TkStateParseProc,
- TkStatePrintProc, (ClientData) 2
- };
- static Tk_CustomOption tagsOption = {
- (Tk_OptionParseProc *) Tk_CanvasTagsParseProc,
- Tk_CanvasTagsPrintProc, (ClientData) NULL
- };
- static Tk_CustomOption dashOption = {
- (Tk_OptionParseProc *) TkCanvasDashParseProc,
- TkCanvasDashPrintProc, (ClientData) NULL
- };
- static Tk_CustomOption offsetOption = {
- (Tk_OptionParseProc *) TkOffsetParseProc,
- TkOffsetPrintProc, (ClientData) TK_OFFSET_RELATIVE
- };
- static Tk_CustomOption pixelOption = {
- (Tk_OptionParseProc *) TkPixelParseProc,
- TkPixelPrintProc, (ClientData) NULL
- };
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_CUSTOM, "-activedash", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, outline.activeDash),
- TK_CONFIG_NULL_OK, &dashOption},
- {TK_CONFIG_COLOR, "-activefill", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, activeFillColor),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-activeoutline", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, outline.activeColor),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-activeoutlinestipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, outline.activeStipple),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-activestipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, activeFillStipple),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_CUSTOM, "-activewidth", (char *) NULL, (char *) NULL,
- "0.0", Tk_Offset(RectOvalItem, outline.activeWidth),
- TK_CONFIG_DONT_SET_DEFAULT, &pixelOption},
- {TK_CONFIG_CUSTOM, "-dash", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, outline.dash),
- TK_CONFIG_NULL_OK, &dashOption},
- {TK_CONFIG_PIXELS, "-dashoffset", (char *) NULL, (char *) NULL,
- "0", Tk_Offset(RectOvalItem, outline.offset),
- TK_CONFIG_DONT_SET_DEFAULT},
- {TK_CONFIG_CUSTOM, "-disableddash", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, outline.disabledDash),
- TK_CONFIG_NULL_OK, &dashOption},
- {TK_CONFIG_COLOR, "-disabledfill", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, disabledFillColor),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-disabledoutline", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, outline.disabledColor),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-disabledoutlinestipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, outline.disabledStipple),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_BITMAP, "-disabledstipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, disabledFillStipple),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_PIXELS, "-disabledwidth", (char *) NULL, (char *) NULL,
- "0.0", Tk_Offset(RectOvalItem, outline.disabledWidth),
- TK_CONFIG_DONT_SET_DEFAULT, &pixelOption},
- {TK_CONFIG_COLOR, "-fill", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, fillColor), TK_CONFIG_NULL_OK},
- {TK_CONFIG_CUSTOM, "-offset", (char *) NULL, (char *) NULL,
- "0,0", Tk_Offset(RectOvalItem, tsoffset),
- TK_CONFIG_DONT_SET_DEFAULT, &offsetOption},
- {TK_CONFIG_COLOR, "-outline", (char *) NULL, (char *) NULL,
- "black", Tk_Offset(RectOvalItem, outline.color), TK_CONFIG_NULL_OK},
- {TK_CONFIG_CUSTOM, "-outlineoffset", (char *) NULL, (char *) NULL,
- "0,0", Tk_Offset(RectOvalItem, outline.tsoffset),
- TK_CONFIG_DONT_SET_DEFAULT, &offsetOption},
- {TK_CONFIG_BITMAP, "-outlinestipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, outline.stipple),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_CUSTOM, "-state", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(Tk_Item, state),TK_CONFIG_NULL_OK,
- &stateOption},
- {TK_CONFIG_BITMAP, "-stipple", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(RectOvalItem, fillStipple), TK_CONFIG_NULL_OK},
- {TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
- (char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
- {TK_CONFIG_CUSTOM, "-width", (char *) NULL, (char *) NULL,
- "1.0", Tk_Offset(RectOvalItem, outline.width),
- TK_CONFIG_DONT_SET_DEFAULT, &pixelOption},
- {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
- (char *) NULL, 0, 0}
- };
- /*
- * Prototypes for procedures defined in this file:
- */
- static void ComputeRectOvalBbox _ANSI_ARGS_((Tk_Canvas canvas,
- RectOvalItem *rectOvalPtr));
- static int ConfigureRectOval _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
- Tcl_Obj *CONST objv[], int flags));
- static int CreateRectOval _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, struct Tk_Item *itemPtr,
- int objc, Tcl_Obj *CONST objv[]));
- static void DeleteRectOval _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, Display *display));
- static void DisplayRectOval _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, Display *display, Drawable dst,
- int x, int y, int width, int height));
- static int OvalToArea _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double *areaPtr));
- static double OvalToPoint _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double *pointPtr));
- static int RectOvalCoords _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, Tk_Item *itemPtr, int objc,
- Tcl_Obj *CONST objv[]));
- static int RectOvalToPostscript _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, Tk_Item *itemPtr, int prepass));
- static int RectToArea _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double *areaPtr));
- static double RectToPoint _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double *pointPtr));
- static void ScaleRectOval _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double originX, double originY,
- double scaleX, double scaleY));
- static void TranslateRectOval _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double deltaX, double deltaY));
- /*
- * The structures below defines the rectangle and oval item types
- * by means of procedures that can be invoked by generic item code.
- */
- Tk_ItemType tkRectangleType = {
- "rectangle", /* name */
- sizeof(RectOvalItem), /* itemSize */
- CreateRectOval, /* createProc */
- configSpecs, /* configSpecs */
- ConfigureRectOval, /* configureProc */
- RectOvalCoords, /* coordProc */
- DeleteRectOval, /* deleteProc */
- DisplayRectOval, /* displayProc */
- TK_CONFIG_OBJS, /* flags */
- RectToPoint, /* pointProc */
- RectToArea, /* areaProc */
- RectOvalToPostscript, /* postscriptProc */
- ScaleRectOval, /* scaleProc */
- TranslateRectOval, /* translateProc */
- (Tk_ItemIndexProc *) NULL, /* indexProc */
- (Tk_ItemCursorProc *) NULL, /* icursorProc */
- (Tk_ItemSelectionProc *) NULL, /* selectionProc */
- (Tk_ItemInsertProc *) NULL, /* insertProc */
- (Tk_ItemDCharsProc *) NULL, /* dTextProc */
- (Tk_ItemType *) NULL, /* nextPtr */
- };
- Tk_ItemType tkOvalType = {
- "oval", /* name */
- sizeof(RectOvalItem), /* itemSize */
- CreateRectOval, /* createProc */
- configSpecs, /* configSpecs */
- ConfigureRectOval, /* configureProc */
- RectOvalCoords, /* coordProc */
- DeleteRectOval, /* deleteProc */
- DisplayRectOval, /* displayProc */
- TK_CONFIG_OBJS, /* flags */
- OvalToPoint, /* pointProc */
- OvalToArea, /* areaProc */
- RectOvalToPostscript, /* postscriptProc */
- ScaleRectOval, /* scaleProc */
- TranslateRectOval, /* translateProc */
- (Tk_ItemIndexProc *) NULL, /* indexProc */
- (Tk_ItemCursorProc *) NULL, /* cursorProc */
- (Tk_ItemSelectionProc *) NULL, /* selectionProc */
- (Tk_ItemInsertProc *) NULL, /* insertProc */
- (Tk_ItemDCharsProc *) NULL, /* dTextProc */
- (Tk_ItemType *) NULL, /* nextPtr */
- };
- /*
- *--------------------------------------------------------------
- *
- * CreateRectOval --
- *
- * This procedure is invoked to create a new rectangle
- * or oval item in a canvas.
- *
- * Results:
- * A standard Tcl return value. If an error occurred in
- * creating the item, then an error message is left in
- * the interp's result; in this case itemPtr is left uninitialized,
- * so it can be safely freed by the caller.
- *
- * Side effects:
- * A new rectangle or oval item is created.
- *
- *--------------------------------------------------------------
- */
- static int
- CreateRectOval(interp, canvas, itemPtr, objc, objv)
- Tcl_Interp *interp; /* For error reporting. */
- Tk_Canvas canvas; /* Canvas to hold new item. */
- Tk_Item *itemPtr; /* Record to hold new item; header
- * has been initialized by caller. */
- int objc; /* Number of arguments in objv. */
- Tcl_Obj *CONST objv[]; /* Arguments describing rectangle. */
- {
- RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
- int i;
- if (objc == 0) {
- panic("canvas did not pass any coordsn");
- }
- /*
- * Carry out initialization that is needed in order to clean
- * up after errors during the the remainder of this procedure.
- */
- Tk_CreateOutline(&(rectOvalPtr->outline));
- rectOvalPtr->tsoffset.flags = 0;
- rectOvalPtr->tsoffset.xoffset = 0;
- rectOvalPtr->tsoffset.yoffset = 0;
- rectOvalPtr->fillColor = NULL;
- rectOvalPtr->activeFillColor = NULL;
- rectOvalPtr->disabledFillColor = NULL;
- rectOvalPtr->fillStipple = None;
- rectOvalPtr->activeFillStipple = None;
- rectOvalPtr->disabledFillStipple = None;
- rectOvalPtr->fillGC = None;
- /*
- * Process the arguments to fill in the item record.
- */
- for (i = 1; i < objc; i++) {
- char *arg = Tcl_GetString(objv[i]);
- if ((arg[0] == '-') && (arg[1] >= 'a') && (arg[1] <= 'z')) {
- break;
- }
- }
- if ((RectOvalCoords(interp, canvas, itemPtr, i, objv) != TCL_OK)) {
- goto error;
- }
- if (ConfigureRectOval(interp, canvas, itemPtr, objc-i, objv+i, 0)
- == TCL_OK) {
- return TCL_OK;
- }
- error:
- DeleteRectOval(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
- return TCL_ERROR;
- }
- /*
- *--------------------------------------------------------------
- *
- * RectOvalCoords --
- *
- * This procedure is invoked to process the "coords" widget
- * command on rectangles and ovals. See the user documentation
- * for details on what it does.
- *
- * Results:
- * Returns TCL_OK or TCL_ERROR, and sets the interp's result.
- *
- * Side effects:
- * The coordinates for the given item may be changed.
- *
- *--------------------------------------------------------------
- */
- static int
- RectOvalCoords(interp, canvas, itemPtr, objc, objv)
- Tcl_Interp *interp; /* Used for error reporting. */
- Tk_Canvas canvas; /* Canvas containing item. */
- Tk_Item *itemPtr; /* Item whose coordinates are to be
- * read or modified. */
- int objc; /* Number of coordinates supplied in
- * objv. */
- Tcl_Obj *CONST objv[]; /* Array of coordinates: x1, y1,
- * x2, y2, ... */
- {
- RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
- if (objc == 0) {
- Tcl_Obj *obj = Tcl_NewObj();
- Tcl_Obj *subobj = Tcl_NewDoubleObj(rectOvalPtr->bbox[0]);
- Tcl_ListObjAppendElement(interp, obj, subobj);
- subobj = Tcl_NewDoubleObj(rectOvalPtr->bbox[1]);
- Tcl_ListObjAppendElement(interp, obj, subobj);
- subobj = Tcl_NewDoubleObj(rectOvalPtr->bbox[2]);
- Tcl_ListObjAppendElement(interp, obj, subobj);
- subobj = Tcl_NewDoubleObj(rectOvalPtr->bbox[3]);
- Tcl_ListObjAppendElement(interp, obj, subobj);
- Tcl_SetObjResult(interp, obj);
- } else if ((objc == 1)||(objc == 4)) {
- if (objc==1) {
- if (Tcl_ListObjGetElements(interp, objv[0], &objc,
- (Tcl_Obj ***) &objv) != TCL_OK) {
- return TCL_ERROR;
- } else if (objc != 4) {
- char buf[64 + TCL_INTEGER_SPACE];
- sprintf(buf, "wrong # coordinates: expected 0 or 4, got %d", objc);
- Tcl_SetResult(interp, buf, TCL_VOLATILE);
- return TCL_ERROR;
- }
- }
- if ((Tk_CanvasGetCoordFromObj(interp, canvas, objv[0],
- &rectOvalPtr->bbox[0]) != TCL_OK)
- || (Tk_CanvasGetCoordFromObj(interp, canvas, objv[1],
- &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);
- } else {
- char buf[64 + TCL_INTEGER_SPACE];
-
- sprintf(buf, "wrong # coordinates: expected 0 or 4, got %d", objc);
- Tcl_SetResult(interp, buf, TCL_VOLATILE);
- return TCL_ERROR;
- }
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * ConfigureRectOval --
- *
- * This procedure 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(interp, canvas, itemPtr, objc, objv, flags)
- 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 = None;
- }
- if (rectOvalPtr->outline.gc != None) {
- Tk_FreeGC(Tk_Display(tkwin), rectOvalPtr->outline.gc);
- }
- rectOvalPtr->outline.gc = newGC;
- if(state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- if (state==TK_STATE_HIDDEN) {
- ComputeRectOvalBbox(canvas, rectOvalPtr);
- return TCL_OK;
- }
- color = rectOvalPtr->fillColor;
- stipple = rectOvalPtr->fillStipple;
- if (((TkCanvas *)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 = None;
- } 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 != None ?
- rectOvalPtr->outline.gc->line_width : 0;
- mask |= GCLineWidth;
- #endif
- newGC = Tk_GetGC(tkwin, mask, &gcValues);
- }
- if (rectOvalPtr->fillGC != None) {
- 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 procedure 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(canvas, itemPtr, display)
- 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 != None) {
- Tk_FreeGC(display, rectOvalPtr->fillGC);
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * ComputeRectOvalBbox --
- *
- * This procedure 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(canvas, rectOvalPtr)
- 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 = ((TkCanvas *)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 (((TkCanvas *)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 tmp;
- tmp = rectOvalPtr->bbox[3];
- rectOvalPtr->bbox[3] = rectOvalPtr->bbox[1];
- rectOvalPtr->bbox[1] = tmp;
- }
- if (rectOvalPtr->bbox[0] > rectOvalPtr->bbox[2]) {
- double tmp;
- tmp = rectOvalPtr->bbox[2];
- rectOvalPtr->bbox[2] = rectOvalPtr->bbox[0];
- rectOvalPtr->bbox[0] = tmp;
- }
- if (rectOvalPtr->outline.gc == None) {
- /*
- * 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
- } 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
- }
- /*
- * 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 procedure 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(canvas, itemPtr, display, drawable, x, y, width, height)
- Tk_Canvas canvas; /* Canvas that contains item. */
- Tk_Item *itemPtr; /* Item to be displayed. */
- Display *display; /* Display on which to draw item. */
- Drawable drawable; /* Pixmap or window in which to draw
- * item. */
- int x, y, width, height; /* Describes region of canvas that
- * must be redisplayed (not used). */
- {
- 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) {
- x2 = x1+1;
- }
- if (y2 <= y1) {
- y2 = 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 = ((TkCanvas *)canvas)->canvas_state;
- }
- fillStipple = rectOvalPtr->fillStipple;
- if (((TkCanvas *)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 != None) {
- if (fillStipple != None) {
- Tk_TSOffset *tsoffset;
- int w=0; int 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 != None) {
- 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(canvas, itemPtr, pointPtr)
- Tk_Canvas canvas; /* Canvas containing item. */
- Tk_Item *itemPtr; /* Item to check against point. */
- double *pointPtr; /* Pointer to x and y coordinates. */
- {
- 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 = ((TkCanvas *)canvas)->canvas_state;
- }
- width = rectPtr->outline.width;
- if (((TkCanvas *)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 != None) {
- 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 != None) || (rectPtr->outline.gc == None)) {
- 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(canvas, itemPtr, pointPtr)
- Tk_Canvas canvas; /* Canvas containing item. */
- Tk_Item *itemPtr; /* Item to check against point. */
- double *pointPtr; /* Pointer to x and y coordinates. */
- {
- RectOvalItem *ovalPtr = (RectOvalItem *) itemPtr;
- double width;
- int filled;
- Tk_State state = itemPtr->state;
- if(state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- width = (double) ovalPtr->outline.width;
- if (((TkCanvas *)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 != None;
- if (ovalPtr->outline.gc == None) {
- width = 0.0;
- filled = 1;
- }
- return TkOvalToPoint(ovalPtr->bbox, width, filled, pointPtr);
- }
- /*
- *--------------------------------------------------------------
- *
- * RectToArea --
- *
- * This procedure 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(canvas, itemPtr, areaPtr)
- 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 = ((TkCanvas *)canvas)->canvas_state;
- }
- width = rectPtr->outline.width;
- if (((TkCanvas *)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 == None) {
- 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 == None) && (rectPtr->outline.gc != None)
- && (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 procedure is called to determine whether an item
- * lies entirely inside, entirely outside, or overlapping
- * a given rectangular area.
- *
- * Results:
- * -1 is returned if the item is entirely outside the area
- * given by rectPtr, 0 if it overlaps, and 1 if it is entirely
- * inside the given area.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- /* ARGSUSED */
- static int
- OvalToArea(canvas, itemPtr, areaPtr)
- 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;
- int result;
- double width;
- Tk_State state = itemPtr->state;
- if(state == TK_STATE_NULL) {
- state = ((TkCanvas *)canvas)->canvas_state;
- }
- width = ovalPtr->outline.width;
- if (((TkCanvas *)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 == None) {
- 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 != None)
- && (ovalPtr->fillGC == None)) {
- 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 procedure 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(canvas, itemPtr, originX, originY, scaleX, scaleY)
- Tk_Canvas canvas; /* Canvas containing rectangle. */
- Tk_Item *itemPtr; /* Rectangle to be scaled. */
- double originX, originY; /* Origin about which to scale rect. */
- double scaleX; /* Amount to scale in X direction. */
- double scaleY; /* Amount to scale in Y direction. */
- {
- 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 procedure 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(canvas, itemPtr, deltaX, deltaY)
- Tk_Canvas canvas; /* Canvas containing item. */
- Tk_Item *itemPtr; /* Item that is being moved. */
- double deltaX, deltaY; /* Amount by which item is to be
- * moved. */
- {
- 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 procedure 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(interp, canvas, itemPtr, prepass)
- 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. */
- {
- char pathCmd[500];
- RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
- double y1, y2;
- XColor *color;
- XColor *fillColor;
- Pixmap fillStipple;
- Tk_State state = itemPtr->state;
- 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 procedure's code that is type-
- * specific.
- */
- if (rectOvalPtr->header.typePtr == &tkRectangleType) {
- sprintf(pathCmd, "%.15g %.15g moveto %.15g 0 rlineto 0 %.15g rlineto %.15g 0 rlineto closepathn",
- rectOvalPtr->bbox[0], y1,
- rectOvalPtr->bbox[2]-rectOvalPtr->bbox[0], y2-y1,
- rectOvalPtr->bbox[0]-rectOvalPtr->bbox[2]);
- } else {
- sprintf(pathCmd, "matrix currentmatrixn%.15g %.15g translate %.15g %.15g scale 1 0 moveto 0 0 1 0 360 arcnsetmatrixn",
- (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 = ((TkCanvas *)canvas)->canvas_state;
- }
- color = rectOvalPtr->outline.color;
- fillColor = rectOvalPtr->fillColor;
- fillStipple = rectOvalPtr->fillStipple;
- if (((TkCanvas *)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;
- }
- }
- /*
- * First draw the filled area of the rectangle.
- */
- if (fillColor != NULL) {
- Tcl_AppendResult(interp, pathCmd, (char *) NULL);
- if (Tk_CanvasPsColor(interp, canvas, fillColor)
- != TCL_OK) {
- return TCL_ERROR;
- }
- if (fillStipple != None) {
- Tcl_AppendResult(interp, "clip ", (char *) NULL);
- if (Tk_CanvasPsStipple(interp, canvas, fillStipple)
- != TCL_OK) {
- return TCL_ERROR;
- }
- if (color != NULL) {
- Tcl_AppendResult(interp, "grestore gsaven", (char *) NULL);
- }
- } else {
- Tcl_AppendResult(interp, "filln", (char *) NULL);
- }
- }
- /*
- * Now draw the outline, if there is one.
- */
- if (color != NULL) {
- Tcl_AppendResult(interp, pathCmd, "0 setlinejoin 2 setlinecapn",
- (char *) NULL);
- if (Tk_CanvasPsOutline(canvas, itemPtr,
- &(rectOvalPtr->outline))!= TCL_OK) {
- return TCL_ERROR;
- }
- }
- return TCL_OK;
- }