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- /*
- * tkCanvWind.c --
- *
- * This file implements window items for canvas widgets.
- *
- * Copyright (c) 1992-1994 The Regents of the University of California.
- * Copyright (c) 1994-1995 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
- static char sccsid[] = "@(#) tkCanvWind.c 1.18 95/03/17 16:01:46";
-
- #include <stdio.h>
- #include "tkInt.h"
- #include "tkPort.h"
- #include "tkCanvas.h"
-
- /*
- * The structure below defines the record for each window item.
- */
-
- typedef struct WindowItem {
- Tk_Item header; /* Generic stuff that's the same for all
- * types. MUST BE FIRST IN STRUCTURE. */
- double x, y; /* Coordinates of positioning point for
- * window. */
- Tk_Window tkwin; /* Window associated with item. NULL means
- * window has been destroyed. */
- int width; /* Width to use for window (<= 0 means use
- * window's requested width). */
- int height; /* Width to use for window (<= 0 means use
- * window's requested width). */
- Tk_Anchor anchor; /* Where to anchor window relative to
- * (x,y). */
- Tk_Canvas canvas; /* Canvas containing this item. */
- } WindowItem;
-
- /*
- * Information used for parsing configuration specs:
- */
-
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_ANCHOR, "-anchor", (char *) NULL, (char *) NULL,
- "center", Tk_Offset(WindowItem, anchor), TK_CONFIG_DONT_SET_DEFAULT},
- {TK_CONFIG_PIXELS, "-height", (char *) NULL, (char *) NULL,
- "0", Tk_Offset(WindowItem, height), TK_CONFIG_DONT_SET_DEFAULT},
- {TK_CONFIG_CUSTOM, "-tags", (char *) NULL, (char *) NULL,
- (char *) NULL, 0, TK_CONFIG_NULL_OK, &tk_CanvasTagsOption},
- {TK_CONFIG_PIXELS, "-width", (char *) NULL, (char *) NULL,
- "0", Tk_Offset(WindowItem, width), TK_CONFIG_DONT_SET_DEFAULT},
- {TK_CONFIG_WINDOW, "-window", (char *) NULL, (char *) NULL,
- (char *) NULL, Tk_Offset(WindowItem, tkwin), TK_CONFIG_NULL_OK},
- {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
- (char *) NULL, 0, 0}
- };
-
- /*
- * Prototypes for procedures defined in this file:
- */
-
- static void ComputeWindowBbox _ANSI_ARGS_((Tk_Canvas canvas,
- WindowItem *winItemPtr));
- static int ConfigureWinItem _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
- char **argv, int flags));
- static int CreateWinItem _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, struct Tk_Item *itemPtr,
- int argc, char **argv));
- static void DeleteWinItem _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, Display *display));
- static void DisplayWinItem _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, Display *display, Drawable dst,
- int x, int y, int width, int height));
- static void ScaleWinItem _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double originX, double originY,
- double scaleX, double scaleY));
- static void TranslateWinItem _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double deltaX, double deltaY));
- static int WinItemCoords _ANSI_ARGS_((Tcl_Interp *interp,
- Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
- char **argv));
- static void WinItemLostSlaveProc _ANSI_ARGS_((
- ClientData clientData, Tk_Window tkwin));
- static void WinItemRequestProc _ANSI_ARGS_((ClientData clientData,
- Tk_Window tkwin));
- static void WinItemStructureProc _ANSI_ARGS_((
- ClientData clientData, XEvent *eventPtr));
- static int WinItemToArea _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double *rectPtr));
- static double WinItemToPoint _ANSI_ARGS_((Tk_Canvas canvas,
- Tk_Item *itemPtr, double *pointPtr));
-
- /*
- * The structure below defines the window item type by means of procedures
- * that can be invoked by generic item code.
- */
-
- Tk_ItemType tkWindowType = {
- "window", /* name */
- sizeof(WindowItem), /* itemSize */
- CreateWinItem, /* createProc */
- configSpecs, /* configSpecs */
- ConfigureWinItem, /* configureProc */
- WinItemCoords, /* coordProc */
- DeleteWinItem, /* deleteProc */
- DisplayWinItem, /* displayProc */
- 1, /* alwaysRedraw */
- WinItemToPoint, /* pointProc */
- WinItemToArea, /* areaProc */
- (Tk_ItemPostscriptProc *) NULL, /* postscriptProc */
- ScaleWinItem, /* scaleProc */
- TranslateWinItem, /* 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 */
- };
-
-
- /*
- * The structure below defines the official type record for the
- * placer:
- */
-
- static Tk_GeomMgr canvasGeomType = {
- "canvas", /* name */
- WinItemRequestProc, /* requestProc */
- WinItemLostSlaveProc, /* lostSlaveProc */
- };
-
- /*
- *--------------------------------------------------------------
- *
- * CreateWinItem --
- *
- * This procedure is invoked to create a new window
- * 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
- * interp->result; in this case itemPtr is
- * left uninitialized, so it can be safely freed by the
- * caller.
- *
- * Side effects:
- * A new window item is created.
- *
- *--------------------------------------------------------------
- */
-
- static int
- CreateWinItem(interp, canvas, itemPtr, argc, argv)
- Tcl_Interp *interp; /* Interpreter 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. */
- char **argv; /* Arguments describing rectangle. */
- {
- WindowItem *winItemPtr = (WindowItem *) itemPtr;
-
- if (argc < 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- Tk_PathName(Tk_CanvasTkwin(canvas)), "\" create ",
- itemPtr->typePtr->name, " x y ?options?",
- (char *) NULL);
- return TCL_ERROR;
- }
-
- /*
- * Initialize item's record.
- */
-
- winItemPtr->tkwin = NULL;
- winItemPtr->width = 0;
- winItemPtr->height = 0;
- winItemPtr->anchor = TK_ANCHOR_CENTER;
- winItemPtr->canvas = canvas;
-
- /*
- * Process the arguments to fill in the item record.
- */
-
- if ((Tk_CanvasGetCoord(interp, canvas, argv[0], &winItemPtr->x) != TCL_OK)
- || (Tk_CanvasGetCoord(interp, canvas, argv[1],
- &winItemPtr->y) != TCL_OK)) {
- return TCL_ERROR;
- }
-
- if (ConfigureWinItem(interp, canvas, itemPtr, argc-2, argv+2, 0)
- != TCL_OK) {
- DeleteWinItem(canvas, itemPtr, Tk_Display(Tk_CanvasTkwin(canvas)));
- return TCL_ERROR;
- }
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * WinItemCoords --
- *
- * This procedure is invoked to process the "coords" widget
- * command on window items. See the user documentation for
- * details on what it does.
- *
- * Results:
- * Returns TCL_OK or TCL_ERROR, and sets interp->result.
- *
- * Side effects:
- * The coordinates for the given item may be changed.
- *
- *--------------------------------------------------------------
- */
-
- static int
- WinItemCoords(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. */
- char **argv; /* Array of coordinates: x1, y1,
- * x2, y2, ... */
- {
- WindowItem *winItemPtr = (WindowItem *) itemPtr;
- char x[TCL_DOUBLE_SPACE], y[TCL_DOUBLE_SPACE];
-
- if (argc == 0) {
- Tcl_PrintDouble(interp, winItemPtr->x, x);
- Tcl_PrintDouble(interp, winItemPtr->y, y);
- Tcl_AppendResult(interp, x, " ", y, (char *) NULL);
- } else if (argc == 2) {
- if ((Tk_CanvasGetCoord(interp, canvas, argv[0], &winItemPtr->x)
- != TCL_OK) || (Tk_CanvasGetCoord(interp, canvas, argv[1],
- &winItemPtr->y) != TCL_OK)) {
- return TCL_ERROR;
- }
- ComputeWindowBbox(canvas, winItemPtr);
- } else {
- sprintf(interp->result,
- "wrong # coordinates: expected 0 or 2, got %d", argc);
- return TCL_ERROR;
- }
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * ConfigureWinItem --
- *
- * This procedure is invoked to configure various aspects
- * of a window item, such as its anchor position.
- *
- * Results:
- * A standard Tcl result code. If an error occurs, then
- * an error message is left in interp->result.
- *
- * Side effects:
- * Configuration information may be set for itemPtr.
- *
- *--------------------------------------------------------------
- */
-
- static int
- ConfigureWinItem(interp, canvas, itemPtr, argc, argv, flags)
- Tcl_Interp *interp; /* Used for error reporting. */
- Tk_Canvas canvas; /* Canvas containing itemPtr. */
- Tk_Item *itemPtr; /* Window item to reconfigure. */
- int argc; /* Number of elements in argv. */
- char **argv; /* Arguments describing things to configure. */
- int flags; /* Flags to pass to Tk_ConfigureWidget. */
- {
- WindowItem *winItemPtr = (WindowItem *) itemPtr;
- Tk_Window oldWindow;
- Tk_Window canvasTkwin;
-
- oldWindow = winItemPtr->tkwin;
- canvasTkwin = Tk_CanvasTkwin(canvas);
- if (Tk_ConfigureWidget(interp, canvasTkwin, configSpecs, argc, argv,
- (char *) winItemPtr, flags) != TCL_OK) {
- return TCL_ERROR;
- }
-
- /*
- * A few of the options require additional processing.
- */
-
- if (oldWindow != winItemPtr->tkwin) {
- if (oldWindow != NULL) {
- Tk_DeleteEventHandler(oldWindow, StructureNotifyMask,
- WinItemStructureProc, (ClientData) winItemPtr);
- Tk_ManageGeometry(oldWindow, (Tk_GeomMgr *) NULL,
- (ClientData) NULL);
- Tk_UnmaintainGeometry(oldWindow, canvasTkwin);
- Tk_UnmapWindow(oldWindow);
- }
- if (winItemPtr->tkwin != NULL) {
- Tk_Window ancestor, parent;
-
- /*
- * Make sure that the canvas is either the parent of the
- * window associated with the item or a descendant of that
- * parent. Also, don't allow a top-level window to be
- * managed inside a canvas.
- */
-
- parent = Tk_Parent(winItemPtr->tkwin);
- for (ancestor = canvasTkwin; ;
- ancestor = Tk_Parent(ancestor)) {
- if (ancestor == parent) {
- break;
- }
- if (((Tk_FakeWin *) (ancestor))->flags & TK_TOP_LEVEL) {
- badWindow:
- Tcl_AppendResult(interp, "can't use ",
- Tk_PathName(winItemPtr->tkwin),
- " in a window item of this canvas", (char *) NULL);
- winItemPtr->tkwin = NULL;
- return TCL_ERROR;
- }
- }
- if (((Tk_FakeWin *) (winItemPtr->tkwin))->flags & TK_TOP_LEVEL) {
- goto badWindow;
- }
- if (winItemPtr->tkwin == canvasTkwin) {
- goto badWindow;
- }
- Tk_CreateEventHandler(winItemPtr->tkwin, StructureNotifyMask,
- WinItemStructureProc, (ClientData) winItemPtr);
- Tk_ManageGeometry(winItemPtr->tkwin, &canvasGeomType,
- (ClientData) winItemPtr);
- }
- }
-
- ComputeWindowBbox(canvas, winItemPtr);
-
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * DeleteWinItem --
- *
- * This procedure is called to clean up the data structure
- * associated with a window item.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Resources associated with itemPtr are released.
- *
- *--------------------------------------------------------------
- */
-
- static void
- DeleteWinItem(canvas, itemPtr, display)
- Tk_Canvas canvas; /* Overall info about widget. */
- Tk_Item *itemPtr; /* Item that is being deleted. */
- Display *display; /* Display containing window for
- * canvas. */
- {
- WindowItem *winItemPtr = (WindowItem *) itemPtr;
- Tk_Window canvasTkwin = Tk_CanvasTkwin(canvas);
-
- if (winItemPtr->tkwin != NULL) {
- Tk_DeleteEventHandler(winItemPtr->tkwin, StructureNotifyMask,
- WinItemStructureProc, (ClientData) winItemPtr);
- Tk_ManageGeometry(winItemPtr->tkwin, (Tk_GeomMgr *) NULL,
- (ClientData) NULL);
- if (canvasTkwin != Tk_Parent(winItemPtr->tkwin)) {
- Tk_UnmaintainGeometry(winItemPtr->tkwin, canvasTkwin);
- }
- Tk_UnmapWindow(winItemPtr->tkwin);
- }
- }
-
- /*
- *--------------------------------------------------------------
- *
- * ComputeWindowBbox --
- *
- * This procedure is invoked to compute the bounding box of
- * all the pixels that may be drawn as part of a window item.
- * This procedure is where the child window's placement is
- * computed.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The fields x1, y1, x2, and y2 are updated in the header
- * for itemPtr.
- *
- *--------------------------------------------------------------
- */
-
- static void
- ComputeWindowBbox(canvas, winItemPtr)
- Tk_Canvas canvas; /* Canvas that contains item. */
- WindowItem *winItemPtr; /* Item whose bbox is to be
- * recomputed. */
- {
- int width, height, x, y;
-
- x = winItemPtr->x + 0.5;
- y = winItemPtr->y + 0.5;
-
- if (winItemPtr->tkwin == NULL) {
- winItemPtr->header.x1 = winItemPtr->header.x2 = x;
- winItemPtr->header.y1 = winItemPtr->header.y2 = y;
- return;
- }
-
- /*
- * Compute dimensions of window.
- */
-
- width = winItemPtr->width;
- if (width <= 0) {
- width = Tk_ReqWidth(winItemPtr->tkwin);
- if (width <= 0) {
- width = 1;
- }
- }
- height = winItemPtr->height;
- if (height <= 0) {
- height = Tk_ReqHeight(winItemPtr->tkwin);
- if (height <= 0) {
- height = 1;
- }
- }
-
- /*
- * Compute location of window, using anchor information.
- */
-
- switch (winItemPtr->anchor) {
- case TK_ANCHOR_N:
- x -= width/2;
- break;
- case TK_ANCHOR_NE:
- x -= width;
- break;
- case TK_ANCHOR_E:
- x -= width;
- y -= height/2;
- break;
- case TK_ANCHOR_SE:
- x -= width;
- y -= height;
- break;
- case TK_ANCHOR_S:
- x -= width/2;
- y -= height;
- break;
- case TK_ANCHOR_SW:
- y -= height;
- break;
- case TK_ANCHOR_W:
- y -= height/2;
- break;
- case TK_ANCHOR_NW:
- break;
- case TK_ANCHOR_CENTER:
- x -= width/2;
- y -= height/2;
- break;
- }
-
- /*
- * Store the information in the item header.
- */
-
- winItemPtr->header.x1 = x;
- winItemPtr->header.y1 = y;
- winItemPtr->header.x2 = x + width;
- winItemPtr->header.y2 = y + height;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * DisplayWinItem --
- *
- * This procedure is invoked to "draw" a window item in a given
- * drawable. Since the window draws itself, we needn't do any
- * actual redisplay here. However, this procedure takes care
- * of actually repositioning the child window so that it occupies
- * the correct screen position.
- *
- * Results:
- * None.
- *
- * Side effects:
- * 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;
-
- /*
- * 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 = scaleY*winItemPtr->width;
- }
- if (winItemPtr->height > 0) {
- winItemPtr->height = 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;
- }
-