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Diffstat (limited to 'generic/tkCanvWind.c')
| -rw-r--r-- | generic/tkCanvWind.c | 862 |
1 files changed, 862 insertions, 0 deletions
diff --git a/generic/tkCanvWind.c b/generic/tkCanvWind.c new file mode 100644 index 0000000..61b21da --- /dev/null +++ b/generic/tkCanvWind.c @@ -0,0 +1,862 @@ +/* + * tkCanvWind.c -- + * + * This file implements window items for canvas widgets. + * + * Copyright (c) 1992-1994 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. + * + * SCCS: @(#) tkCanvWind.c 1.29 97/10/14 10:40:54 + */ + +#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_CustomOption tagsOption = {Tk_CanvasTagsParseProc, + Tk_CanvasTagsPrintProc, (ClientData) NULL +}; + +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, &tagsOption}, + {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 = (int) (winItemPtr->x + ((winItemPtr->x >= 0) ? 0.5 : - 0.5)); + y = (int) (winItemPtr->y + ((winItemPtr->y >= 0) ? 0.5 : - 0.5)); + + if (winItemPtr->tkwin == NULL) { + /* + * There is no window for this item yet. Just give it a 1x1 + * bounding box. Don't give it a 0x0 bounding box; there are + * strange cases where this bounding box might be used as the + * dimensions of the window, and 0x0 causes problems under X. + */ + + winItemPtr->header.x1 = x; + winItemPtr->header.x2 = winItemPtr->header.x1 + 1; + winItemPtr->header.y1 = y; + winItemPtr->header.y2 = winItemPtr->header.y1 + 1; + 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; + + /* + * 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; +} |