/* * 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 1.10.2.1 2004/07/27 18:58:33 das Exp $ */ #include #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 coords\n"); } /* * 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; } 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 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; }