shared_source/c_tk_base_7_5_w_mods/tkrectoval.c

/* $Header$ */

/* 
 * 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 1.1.1.1 2001/06/13 05:07:29 dtashley 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 argc,
                            Tcl_Obj *CONST argv[], int flags));
static int              CreateRectOval _ANSI_ARGS_((Tcl_Interp *interp,
                            Tk_Canvas canvas, struct Tk_Item *itemPtr,
                            int argc, Tcl_Obj *CONST argv[]));
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 argc,
                            Tcl_Obj *CONST argv[]));
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, argc, argv)
    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 argc;                           /* Number of arguments in argv. */
    Tcl_Obj *CONST argv[];              /* Arguments describing rectangle. */
{
    RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;
    int i;


    if (argc==1) {
        i = 1;
    } else {
        char *arg = Tcl_GetStringFromObj(argv[1], NULL);
        if ((argc>1) && (arg[0] == '-')
                && (arg[1] >= 'a') && (arg[1] <= 'z')) {
            i = 1;
        } else {
            i = 4;
        }
    }

    if (argc < i) {
        Tcl_AppendResult(interp, "wrong # args: should be \"",
                Tk_PathName(Tk_CanvasTkwin(canvas)), " create ",
                itemPtr->typePtr->name, " x1 y1 x2 y2 ?options?\"",
                (char *) NULL);
        return TCL_ERROR;
    }

    /*
     * 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.
     */

    if ((RectOvalCoords(interp, canvas, itemPtr, i, argv) != TCL_OK)) {
        goto error;
    }
    if (ConfigureRectOval(interp, canvas, itemPtr, argc-i, argv+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, argc, argv)
    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 argc;                           /* Number of coordinates supplied in
                                         * argv. */
    Tcl_Obj *CONST argv[];              /* Array of coordinates: x1, y1,
                                         * x2, y2, ... */
{
    RectOvalItem *rectOvalPtr = (RectOvalItem *) itemPtr;

    if (argc == 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 ((argc == 1)||(argc == 4)) {
        if (argc==1) {
            if (Tcl_ListObjGetElements(interp, argv[0], &argc,
                    (Tcl_Obj ***) &argv) != TCL_OK) {
                return TCL_ERROR;
            } else if (argc != 4) {
                char buf[64 + TCL_INTEGER_SPACE];

                sprintf(buf, "wrong # coordinates: expected 0 or 4, got %d", argc);
                Tcl_SetResult(interp, buf, TCL_VOLATILE);
                return TCL_ERROR;
            }
        }
        if ((Tk_CanvasGetCoordFromObj(interp, canvas, argv[0],
                    &rectOvalPtr->bbox[0]) != TCL_OK)
                || (Tk_CanvasGetCoordFromObj(interp, canvas, argv[1],
                    &rectOvalPtr->bbox[1]) != TCL_OK)
                || (Tk_CanvasGetCoordFromObj(interp, canvas, argv[2],
                        &rectOvalPtr->bbox[2]) != TCL_OK)
                || (Tk_CanvasGetCoordFromObj(interp, canvas, argv[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", argc);
        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, argc, argv, flags)
    Tcl_Interp *interp;         /* Used for error reporting. */
    Tk_Canvas canvas;           /* Canvas containing itemPtr. */
    Tk_Item *itemPtr;           /* Rectangle item to reconfigure. */
    int argc;                   /* Number of elements in argv.  */
    Tcl_Obj *CONST argv[];      /* Arguments describing things to configure. */
    int flags;                  /* Flags to pass to Tk_ConfigureWidget. */
{
    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 (Tk_ConfigureWidget(interp, tkwin, configSpecs, argc, (char **) argv,
            (char *) rectOvalPtr, flags|TK_CONFIG_OBJS) != TCL_OK) {
        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;
        }
        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 {
        bloat = (int) (width+1)/2;
    }

    /*
     * 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 closepath\n",
                rectOvalPtr->bbox[0], y1,
                rectOvalPtr->bbox[2]-rectOvalPtr->bbox[0], y2-y1,
                rectOvalPtr->bbox[0]-rectOvalPtr->bbox[2]);
    } else {
        sprintf(pathCmd, "matrix currentmatrix\n%.15g %.15g translate %.15g %.15g scale 1 0 moveto 0 0 1 0 360 arc\nsetmatrix\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 = ((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 gsave\n", (char *) NULL);
            }
        } else {
            Tcl_AppendResult(interp, "fill\n", (char *) NULL);
        }
    }

    /*
     * Now draw the outline, if there is one.
     */

    if (color != NULL) {
        Tcl_AppendResult(interp, pathCmd, "0 setlinejoin 2 setlinecap\n",
                (char *) NULL);
        if (Tk_CanvasPsOutline(canvas, itemPtr,
                &(rectOvalPtr->outline))!= TCL_OK) {
            return TCL_ERROR;
        }
    }
    return TCL_OK;
}

/* End of tkrectoval.c */