863 lines
25 KiB
C
863 lines
25 KiB
C
/*
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* tkCanvWind.c --
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*
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* This file implements window items for canvas widgets.
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*
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* Copyright (c) 1992-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* SCCS: @(#) tkCanvWind.c 1.29 97/10/14 10:40:54
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*/
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#include <stdio.h>
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#include "tkInt.h"
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#include "tkPort.h"
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#include "tkCanvas.h"
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/*
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* The structure below defines the record for each window item.
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*/
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typedef struct WindowItem {
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Tk_Item header; /* Generic stuff that's the same for all
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* types. MUST BE FIRST IN STRUCTURE. */
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double x, y; /* Coordinates of positioning point for
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* window. */
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Tk_Window tkwin; /* Window associated with item. NULL means
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* window has been destroyed. */
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int width; /* Width to use for window (<= 0 means use
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* window's requested width). */
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int height; /* Width to use for window (<= 0 means use
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* window's requested width). */
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Tk_Anchor anchor; /* Where to anchor window relative to
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* (x,y). */
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Tk_Canvas canvas; /* Canvas containing this item. */
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} WindowItem;
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/*
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* Information used for parsing configuration specs:
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*/
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static Tk_CustomOption tagsOption = {Tk_CanvasTagsParseProc,
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Tk_CanvasTagsPrintProc, (ClientData) NULL
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};
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static Tk_ConfigSpec configSpecs[] = {
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{TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL,
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"center", Tk_Offset(WindowItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_PIXELS, "-height", (char *) NULL, (char *) NULL,
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"0", Tk_Offset(WindowItem, height), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
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(char *) NULL, 0, TK_CONFIG_NULL_OK, &tagsOption},
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{TK_CONFIG_PIXELS, "-width", (char *) NULL, (char *) NULL,
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"0", Tk_Offset(WindowItem, width), TK_CONFIG_DONT_SET_DEFAULT},
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{TK_CONFIG_WINDOW, "-window", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(WindowItem, tkwin), TK_CONFIG_NULL_OK},
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
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(char *) NULL, 0, 0}
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};
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/*
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* Prototypes for procedures defined in this file:
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*/
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static void ComputeWindowBbox _ANSI_ARGS_((Tk_Canvas canvas,
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WindowItem *winItemPtr));
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static int ConfigureWinItem _ANSI_ARGS_((Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
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char **argv, int flags));
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static int CreateWinItem _ANSI_ARGS_((Tcl_Interp *interp,
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Tk_Canvas canvas, struct Tk_Item *itemPtr,
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int argc, char **argv));
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static void DeleteWinItem _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, Display *display));
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static void DisplayWinItem _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, Display *display, Drawable dst,
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int x, int y, int width, int height));
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static void ScaleWinItem _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, double originX, double originY,
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double scaleX, double scaleY));
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static void TranslateWinItem _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, double deltaX, double deltaY));
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static int WinItemCoords _ANSI_ARGS_((Tcl_Interp *interp,
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Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
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char **argv));
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static void WinItemLostSlaveProc _ANSI_ARGS_((
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ClientData clientData, Tk_Window tkwin));
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static void WinItemRequestProc _ANSI_ARGS_((ClientData clientData,
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Tk_Window tkwin));
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static void WinItemStructureProc _ANSI_ARGS_((
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ClientData clientData, XEvent *eventPtr));
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static int WinItemToArea _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, double *rectPtr));
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static double WinItemToPoint _ANSI_ARGS_((Tk_Canvas canvas,
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Tk_Item *itemPtr, double *pointPtr));
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/*
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* The structure below defines the window item type by means of procedures
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* that can be invoked by generic item code.
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*/
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Tk_ItemType tkWindowType = {
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"window", /* name */
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sizeof(WindowItem), /* itemSize */
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CreateWinItem, /* createProc */
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configSpecs, /* configSpecs */
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ConfigureWinItem, /* configureProc */
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WinItemCoords, /* coordProc */
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DeleteWinItem, /* deleteProc */
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DisplayWinItem, /* displayProc */
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1, /* alwaysRedraw */
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WinItemToPoint, /* pointProc */
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WinItemToArea, /* areaProc */
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(Tk_ItemPostscriptProc *) NULL, /* postscriptProc */
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ScaleWinItem, /* scaleProc */
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TranslateWinItem, /* translateProc */
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(Tk_ItemIndexProc *) NULL, /* indexProc */
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(Tk_ItemCursorProc *) NULL, /* cursorProc */
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(Tk_ItemSelectionProc *) NULL, /* selectionProc */
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(Tk_ItemInsertProc *) NULL, /* insertProc */
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(Tk_ItemDCharsProc *) NULL, /* dTextProc */
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(Tk_ItemType *) NULL /* nextPtr */
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};
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/*
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* The structure below defines the official type record for the
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* placer:
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*/
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static Tk_GeomMgr canvasGeomType = {
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"canvas", /* name */
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WinItemRequestProc, /* requestProc */
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WinItemLostSlaveProc, /* lostSlaveProc */
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};
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/*
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*--------------------------------------------------------------
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*
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* CreateWinItem --
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*
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* This procedure is invoked to create a new window
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* item in a canvas.
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*
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* Results:
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* A standard Tcl return value. If an error occurred in
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* creating the item, then an error message is left in
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* interp->result; in this case itemPtr is
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* left uninitialized, so it can be safely freed by the
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* caller.
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*
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* Side effects:
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* A new window item is created.
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*
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*--------------------------------------------------------------
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*/
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static int
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CreateWinItem(interp, canvas, itemPtr, argc, argv)
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Tcl_Interp *interp; /* Interpreter for error reporting. */
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Tk_Canvas canvas; /* Canvas to hold new item. */
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Tk_Item *itemPtr; /* Record to hold new item; header
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* has been initialized by caller. */
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int argc; /* Number of arguments in argv. */
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char **argv; /* Arguments describing rectangle. */
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{
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WindowItem *winItemPtr = (WindowItem *) itemPtr;
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if (argc < 2) {
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Tcl_AppendResult(interp, "wrong # args: should be \"",
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Tk_PathName(Tk_CanvasTkwin(canvas)), " create ",
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itemPtr->typePtr->name, " x y ?options?\"",
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(char *) NULL);
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return TCL_ERROR;
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}
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/*
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* Initialize item's record.
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*/
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winItemPtr->tkwin = NULL;
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winItemPtr->width = 0;
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winItemPtr->height = 0;
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winItemPtr->anchor = TK_ANCHOR_CENTER;
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winItemPtr->canvas = canvas;
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/*
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* Process the arguments to fill in the item record.
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*/
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if ((Tk_CanvasGetCoord(interp, canvas, argv[0], &winItemPtr->x) != TCL_OK)
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|| (Tk_CanvasGetCoord(interp, canvas, argv[1],
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&winItemPtr->y) != TCL_OK)) {
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return TCL_ERROR;
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}
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if (ConfigureWinItem(interp, canvas, itemPtr, argc-2, argv+2, 0)
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!= TCL_OK) {
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DeleteWinItem(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
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return TCL_ERROR;
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}
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return TCL_OK;
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}
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/*
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*--------------------------------------------------------------
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*
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* WinItemCoords --
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*
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* This procedure is invoked to process the "coords" widget
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* command on window items. See the user documentation for
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* details on what it does.
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*
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* Results:
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* Returns TCL_OK or TCL_ERROR, and sets interp->result.
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*
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* Side effects:
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* The coordinates for the given item may be changed.
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*
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*--------------------------------------------------------------
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*/
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static int
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WinItemCoords(interp, canvas, itemPtr, argc, argv)
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Tcl_Interp *interp; /* Used for error reporting. */
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Tk_Canvas canvas; /* Canvas containing item. */
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Tk_Item *itemPtr; /* Item whose coordinates are to be
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* read or modified. */
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int argc; /* Number of coordinates supplied in
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* argv. */
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char **argv; /* Array of coordinates: x1, y1,
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* x2, y2, ... */
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{
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WindowItem *winItemPtr = (WindowItem *) itemPtr;
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char x[TCL_DOUBLE_SPACE], y[TCL_DOUBLE_SPACE];
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if (argc == 0) {
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Tcl_PrintDouble(interp, winItemPtr->x, x);
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Tcl_PrintDouble(interp, winItemPtr->y, y);
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Tcl_AppendResult(interp, x, " ", y, (char *) NULL);
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} else if (argc == 2) {
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if ((Tk_CanvasGetCoord(interp, canvas, argv[0], &winItemPtr->x)
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!= TCL_OK) || (Tk_CanvasGetCoord(interp, canvas, argv[1],
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&winItemPtr->y) != TCL_OK)) {
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return TCL_ERROR;
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}
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ComputeWindowBbox(canvas, winItemPtr);
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} else {
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sprintf(interp->result,
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"wrong # coordinates: expected 0 or 2, got %d", argc);
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return TCL_ERROR;
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}
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return TCL_OK;
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}
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/*
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*--------------------------------------------------------------
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*
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* ConfigureWinItem --
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*
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* This procedure is invoked to configure various aspects
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* of a window item, such as its anchor position.
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*
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* Results:
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* A standard Tcl result code. If an error occurs, then
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* an error message is left in interp->result.
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*
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* Side effects:
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* Configuration information may be set for itemPtr.
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*
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*--------------------------------------------------------------
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*/
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static int
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ConfigureWinItem(interp, canvas, itemPtr, argc, argv, flags)
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Tcl_Interp *interp; /* Used for error reporting. */
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Tk_Canvas canvas; /* Canvas containing itemPtr. */
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Tk_Item *itemPtr; /* Window item to reconfigure. */
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int argc; /* Number of elements in argv. */
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char **argv; /* Arguments describing things to configure. */
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int flags; /* Flags to pass to Tk_ConfigureWidget. */
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{
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WindowItem *winItemPtr = (WindowItem *) itemPtr;
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Tk_Window oldWindow;
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Tk_Window canvasTkwin;
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oldWindow = winItemPtr->tkwin;
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canvasTkwin = Tk_CanvasTkwin(canvas);
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if (Tk_ConfigureWidget(interp, canvasTkwin, configSpecs, argc, argv,
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(char *) winItemPtr, flags) != TCL_OK) {
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return TCL_ERROR;
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}
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/*
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* A few of the options require additional processing.
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*/
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if (oldWindow != winItemPtr->tkwin) {
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if (oldWindow != NULL) {
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Tk_DeleteEventHandler(oldWindow, StructureNotifyMask,
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WinItemStructureProc, (ClientData) winItemPtr);
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Tk_ManageGeometry(oldWindow, (Tk_GeomMgr *) NULL,
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(ClientData) NULL);
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Tk_UnmaintainGeometry(oldWindow, canvasTkwin);
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Tk_UnmapWindow(oldWindow);
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}
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if (winItemPtr->tkwin != NULL) {
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Tk_Window ancestor, parent;
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/*
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* Make sure that the canvas is either the parent of the
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* window associated with the item or a descendant of that
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* parent. Also, don't allow a top-level window to be
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* managed inside a canvas.
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*/
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parent = Tk_Parent(winItemPtr->tkwin);
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for (ancestor = canvasTkwin; ;
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ancestor = Tk_Parent(ancestor)) {
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if (ancestor == parent) {
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break;
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}
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if (((Tk_FakeWin *) (ancestor))->flags & TK_TOP_LEVEL) {
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badWindow:
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Tcl_AppendResult(interp, "can't use ",
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Tk_PathName(winItemPtr->tkwin),
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" in a window item of this canvas", (char *) NULL);
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winItemPtr->tkwin = NULL;
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return TCL_ERROR;
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}
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}
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if (((Tk_FakeWin *) (winItemPtr->tkwin))->flags & TK_TOP_LEVEL) {
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goto badWindow;
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}
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if (winItemPtr->tkwin == canvasTkwin) {
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goto badWindow;
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}
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Tk_CreateEventHandler(winItemPtr->tkwin, StructureNotifyMask,
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WinItemStructureProc, (ClientData) winItemPtr);
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Tk_ManageGeometry(winItemPtr->tkwin, &canvasGeomType,
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(ClientData) winItemPtr);
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}
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}
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ComputeWindowBbox(canvas, winItemPtr);
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return TCL_OK;
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}
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/*
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*--------------------------------------------------------------
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*
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* DeleteWinItem --
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*
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* This procedure is called to clean up the data structure
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* associated with a window item.
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*
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* Results:
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* None.
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*
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* Side effects:
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* Resources associated with itemPtr are released.
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*
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*--------------------------------------------------------------
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*/
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static void
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DeleteWinItem(canvas, itemPtr, display)
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Tk_Canvas canvas; /* Overall info about widget. */
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Tk_Item *itemPtr; /* Item that is being deleted. */
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Display *display; /* Display containing window for
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* canvas. */
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{
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WindowItem *winItemPtr = (WindowItem *) itemPtr;
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Tk_Window canvasTkwin = Tk_CanvasTkwin(canvas);
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if (winItemPtr->tkwin != NULL) {
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Tk_DeleteEventHandler(winItemPtr->tkwin, StructureNotifyMask,
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WinItemStructureProc, (ClientData) winItemPtr);
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Tk_ManageGeometry(winItemPtr->tkwin, (Tk_GeomMgr *) NULL,
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(ClientData) NULL);
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if (canvasTkwin != Tk_Parent(winItemPtr->tkwin)) {
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Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin);
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}
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Tk_UnmapWindow(winItemPtr->tkwin);
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}
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}
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/*
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*--------------------------------------------------------------
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*
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* ComputeWindowBbox --
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*
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* This procedure is invoked to compute the bounding box of
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* all the pixels that may be drawn as part of a window item.
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* This procedure is where the child window's placement is
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* computed.
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*
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* Results:
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* None.
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*
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* Side effects:
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* The fields x1, y1, x2, and y2 are updated in the header
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* for itemPtr.
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*
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*--------------------------------------------------------------
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*/
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static void
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ComputeWindowBbox(canvas, winItemPtr)
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Tk_Canvas canvas; /* Canvas that contains item. */
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WindowItem *winItemPtr; /* Item whose bbox is to be
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* recomputed. */
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{
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int width, height, x, y;
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x = (int) (winItemPtr->x + ((winItemPtr->x >= 0) ? 0.5 : - 0.5));
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y = (int) (winItemPtr->y + ((winItemPtr->y >= 0) ? 0.5 : - 0.5));
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if (winItemPtr->tkwin == NULL) {
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/*
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* There is no window for this item yet. Just give it a 1x1
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* bounding box. Don't give it a 0x0 bounding box; there are
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* strange cases where this bounding box might be used as the
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* dimensions of the window, and 0x0 causes problems under X.
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*/
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winItemPtr->header.x1 = x;
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winItemPtr->header.x2 = winItemPtr->header.x1 + 1;
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winItemPtr->header.y1 = y;
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winItemPtr->header.y2 = winItemPtr->header.y1 + 1;
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return;
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}
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/*
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* Compute dimensions of window.
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*/
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width = winItemPtr->width;
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if (width <= 0) {
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width = Tk_ReqWidth(winItemPtr->tkwin);
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if (width <= 0) {
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width = 1;
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}
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}
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height = winItemPtr->height;
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if (height <= 0) {
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height = Tk_ReqHeight(winItemPtr->tkwin);
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if (height <= 0) {
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height = 1;
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}
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}
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/*
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* Compute location of window, using anchor information.
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*/
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switch (winItemPtr->anchor) {
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case TK_ANCHOR_N:
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x -= width/2;
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break;
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case TK_ANCHOR_NE:
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x -= width;
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break;
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case TK_ANCHOR_E:
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x -= width;
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y -= height/2;
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break;
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case TK_ANCHOR_SE:
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x -= width;
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y -= height;
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break;
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case TK_ANCHOR_S:
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x -= width/2;
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y -= height;
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break;
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case TK_ANCHOR_SW:
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y -= height;
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break;
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case TK_ANCHOR_W:
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y -= height/2;
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break;
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case TK_ANCHOR_NW:
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break;
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case TK_ANCHOR_CENTER:
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x -= width/2;
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y -= height/2;
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break;
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}
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/*
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* Store the information in the item header.
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*/
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winItemPtr->header.x1 = x;
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winItemPtr->header.y1 = y;
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winItemPtr->header.x2 = x + width;
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winItemPtr->header.y2 = y + height;
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}
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/*
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*--------------------------------------------------------------
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*
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* DisplayWinItem --
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*
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* This procedure is invoked to "draw" a window item in a given
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* drawable. Since the window draws itself, we needn't do any
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* actual redisplay here. However, this procedure takes care
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* of actually repositioning the child window so that it occupies
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* the correct screen position.
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*
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* Results:
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* None.
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*
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* Side effects:
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||
* The child window's position may get changed. Note: this
|
||
* procedure gets called both when a window needs to be displayed
|
||
* and when it ceases to be visible on the screen (e.g. it was
|
||
* scrolled or moved off-screen or the enclosing canvas is
|
||
* unmapped).
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisplayWinItem(canvas, itemPtr, display, drawable, regionX, regionY,
|
||
regionWidth, regionHeight)
|
||
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 regionX, regionY, regionWidth, regionHeight;
|
||
/* Describes region of canvas that
|
||
* must be redisplayed (not used). */
|
||
{
|
||
WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
int width, height;
|
||
short x, y;
|
||
Tk_Window canvasTkwin = Tk_CanvasTkwin(canvas);
|
||
|
||
if (winItemPtr->tkwin == NULL) {
|
||
return;
|
||
}
|
||
|
||
Tk_CanvasWindowCoords(canvas, (double) winItemPtr->header.x1,
|
||
(double) winItemPtr->header.y1, &x, &y);
|
||
width = winItemPtr->header.x2 - winItemPtr->header.x1;
|
||
height = winItemPtr->header.y2 - winItemPtr->header.y1;
|
||
|
||
/*
|
||
* If the window is completely out of the visible area of the canvas
|
||
* then unmap it. This code used not to be present (why unmap the
|
||
* window if it isn't visible anyway?) but this could cause the
|
||
* window to suddenly reappear if the canvas window got resized.
|
||
*/
|
||
|
||
if (((x + width) <= 0) || ((y + height) <= 0)
|
||
|| (x >= Tk_Width(canvasTkwin)) || (y >= Tk_Height(canvasTkwin))) {
|
||
if (canvasTkwin == Tk_Parent(winItemPtr->tkwin)) {
|
||
Tk_UnmapWindow(winItemPtr->tkwin);
|
||
} else {
|
||
Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin);
|
||
}
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Reposition and map the window (but in different ways depending
|
||
* on whether the canvas is the window's parent).
|
||
*/
|
||
|
||
if (canvasTkwin == Tk_Parent(winItemPtr->tkwin)) {
|
||
if ((x != Tk_X(winItemPtr->tkwin)) || (y != Tk_Y(winItemPtr->tkwin))
|
||
|| (width != Tk_Width(winItemPtr->tkwin))
|
||
|| (height != Tk_Height(winItemPtr->tkwin))) {
|
||
Tk_MoveResizeWindow(winItemPtr->tkwin, x, y, width, height);
|
||
}
|
||
Tk_MapWindow(winItemPtr->tkwin);
|
||
} else {
|
||
Tk_MaintainGeometry(winItemPtr->tkwin, canvasTkwin, x, y,
|
||
width, height);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemToPoint --
|
||
*
|
||
* 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 window. If the
|
||
* point isn't inside the window then the return value is the
|
||
* distance from the point to the window.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static double
|
||
WinItemToPoint(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. */
|
||
{
|
||
WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
double x1, x2, y1, y2, xDiff, yDiff;
|
||
|
||
x1 = winItemPtr->header.x1;
|
||
y1 = winItemPtr->header.y1;
|
||
x2 = winItemPtr->header.x2;
|
||
y2 = winItemPtr->header.y2;
|
||
|
||
/*
|
||
* Point is outside rectangle.
|
||
*/
|
||
|
||
if (pointPtr[0] < x1) {
|
||
xDiff = x1 - pointPtr[0];
|
||
} else if (pointPtr[0] >= x2) {
|
||
xDiff = pointPtr[0] + 1 - x2;
|
||
} else {
|
||
xDiff = 0;
|
||
}
|
||
|
||
if (pointPtr[1] < y1) {
|
||
yDiff = y1 - pointPtr[1];
|
||
} else if (pointPtr[1] >= y2) {
|
||
yDiff = pointPtr[1] + 1 - y2;
|
||
} else {
|
||
yDiff = 0;
|
||
}
|
||
|
||
return hypot(xDiff, yDiff);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemToArea --
|
||
*
|
||
* 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.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
WinItemToArea(canvas, itemPtr, rectPtr)
|
||
Tk_Canvas canvas; /* Canvas containing item. */
|
||
Tk_Item *itemPtr; /* Item to check against rectangle. */
|
||
double *rectPtr; /* Pointer to array of four coordinates
|
||
* (x1, y1, x2, y2) describing rectangular
|
||
* area. */
|
||
{
|
||
WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
|
||
if ((rectPtr[2] <= winItemPtr->header.x1)
|
||
|| (rectPtr[0] >= winItemPtr->header.x2)
|
||
|| (rectPtr[3] <= winItemPtr->header.y1)
|
||
|| (rectPtr[1] >= winItemPtr->header.y2)) {
|
||
return -1;
|
||
}
|
||
if ((rectPtr[0] <= winItemPtr->header.x1)
|
||
&& (rectPtr[1] <= winItemPtr->header.y1)
|
||
&& (rectPtr[2] >= winItemPtr->header.x2)
|
||
&& (rectPtr[3] >= winItemPtr->header.y2)) {
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ScaleWinItem --
|
||
*
|
||
* 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
|
||
ScaleWinItem(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. */
|
||
{
|
||
WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
|
||
winItemPtr->x = originX + scaleX*(winItemPtr->x - originX);
|
||
winItemPtr->y = originY + scaleY*(winItemPtr->y - originY);
|
||
if (winItemPtr->width > 0) {
|
||
winItemPtr->width = (int) (scaleX*winItemPtr->width);
|
||
}
|
||
if (winItemPtr->height > 0) {
|
||
winItemPtr->height = (int) (scaleY*winItemPtr->height);
|
||
}
|
||
ComputeWindowBbox(canvas, winItemPtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* TranslateWinItem --
|
||
*
|
||
* 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
|
||
TranslateWinItem(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. */
|
||
{
|
||
WindowItem *winItemPtr = (WindowItem *) itemPtr;
|
||
|
||
winItemPtr->x += deltaX;
|
||
winItemPtr->y += deltaY;
|
||
ComputeWindowBbox(canvas, winItemPtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemStructureProc --
|
||
*
|
||
* This procedure is invoked whenever StructureNotify events
|
||
* occur for a window that's managed as part of a canvas window
|
||
* item. This procudure's only purpose is to clean up when
|
||
* windows are deleted.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The window is disassociated from the window item when it is
|
||
* deleted.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
WinItemStructureProc(clientData, eventPtr)
|
||
ClientData clientData; /* Pointer to record describing window item. */
|
||
XEvent *eventPtr; /* Describes what just happened. */
|
||
{
|
||
WindowItem *winItemPtr = (WindowItem *) clientData;
|
||
|
||
if (eventPtr->type == DestroyNotify) {
|
||
winItemPtr->tkwin = NULL;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemRequestProc --
|
||
*
|
||
* This procedure is invoked whenever a window that's associated
|
||
* with a window canvas item changes its requested dimensions.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The size and location on the screen of the window may change,
|
||
* depending on the options specified for the window item.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
WinItemRequestProc(clientData, tkwin)
|
||
ClientData clientData; /* Pointer to record for window item. */
|
||
Tk_Window tkwin; /* Window that changed its desired
|
||
* size. */
|
||
{
|
||
WindowItem *winItemPtr = (WindowItem *) clientData;
|
||
|
||
ComputeWindowBbox(winItemPtr->canvas, winItemPtr);
|
||
DisplayWinItem(winItemPtr->canvas, (Tk_Item *) winItemPtr,
|
||
(Display *) NULL, (Drawable) None, 0, 0, 0, 0);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* WinItemLostSlaveProc --
|
||
*
|
||
* This procedure is invoked by Tk whenever some other geometry
|
||
* claims control over a slave that used to be managed by us.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Forgets all canvas-related information about the slave.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
WinItemLostSlaveProc(clientData, tkwin)
|
||
ClientData clientData; /* WindowItem structure for slave window that
|
||
* was stolen away. */
|
||
Tk_Window tkwin; /* Tk's handle for the slave window. */
|
||
{
|
||
WindowItem *winItemPtr = (WindowItem *) clientData;
|
||
Tk_Window canvasTkwin = Tk_CanvasTkwin(winItemPtr->canvas);
|
||
|
||
Tk_DeleteEventHandler(winItemPtr->tkwin, StructureNotifyMask,
|
||
WinItemStructureProc, (ClientData) winItemPtr);
|
||
if (canvasTkwin != Tk_Parent(winItemPtr->tkwin)) {
|
||
Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin);
|
||
}
|
||
Tk_UnmapWindow(winItemPtr->tkwin);
|
||
winItemPtr->tkwin = NULL;
|
||
}
|