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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkfocus.c,v 1.1.1.1 2001/06/13 05:00:25 dtashley Exp $ */ |
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/* |
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* tkFocus.c -- |
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* |
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* This file contains procedures that manage the input |
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* focus for Tk. |
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* |
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* Copyright (c) 1990-1994 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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* RCS: @(#) $Id: tkfocus.c,v 1.1.1.1 2001/06/13 05:00:25 dtashley Exp $ |
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*/ |
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#include "tkInt.h" |
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#include "tkPort.h" |
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/* |
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* For each top-level window that has ever received the focus, there |
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* is a record of the following type: |
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*/ |
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typedef struct TkToplevelFocusInfo { |
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TkWindow *topLevelPtr; /* Information about top-level window. */ |
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TkWindow *focusWinPtr; /* The next time the focus comes to this |
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* top-level, it will be given to this |
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* window. */ |
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struct TkToplevelFocusInfo *nextPtr; |
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/* Next in list of all toplevel focus records |
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* for a given application. */ |
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} ToplevelFocusInfo; |
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/* |
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* One of the following structures exists for each display used by |
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* each application. These are linked together from the TkMainInfo |
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* structure. These structures are needed because it isn't |
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* sufficient to store a single piece of focus information in each |
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* display or in each application: we need the cross-product. |
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* There needs to be separate information for each display, because |
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* it's possible to have multiple focus windows active simultaneously |
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* on different displays. There also needs to be separate information |
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* for each application, because of embedding: if an embedded |
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* application has the focus, its container application also has |
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* the focus. Thus we keep a list of structures for each application: |
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* the same display can appear in structures for several applications |
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* at once. |
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*/ |
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typedef struct TkDisplayFocusInfo { |
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TkDisplay *dispPtr; /* Display that this information pertains |
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* to. */ |
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struct TkWindow *focusWinPtr; |
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/* Window that currently has the focus for |
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* this application on this display, or NULL |
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* if none. */ |
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struct TkWindow *focusOnMapPtr; |
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/* This points to a toplevel window that is |
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* supposed to receive the X input focus as |
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* soon as it is mapped (needed to handle the |
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* fact that X won't allow the focus on an |
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* unmapped window). NULL means no delayed |
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* focus op in progress for this display. */ |
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int forceFocus; /* Associated with focusOnMapPtr: non-zero |
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* means claim the focus even if some other |
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* application currently has it. */ |
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unsigned long focusSerial; /* Serial number of last request this |
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* application made to change the focus on |
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* this display. Used to identify stale |
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* focus notifications coming from the |
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* X server. */ |
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struct TkDisplayFocusInfo *nextPtr; |
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/* Next in list of all display focus |
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* records for a given application. */ |
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} DisplayFocusInfo; |
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/* |
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* The following magic value is stored in the "send_event" field of |
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* FocusIn and FocusOut events that are generated in this file. This |
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* allows us to separate "real" events coming from the server from |
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* those that we generated. |
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*/ |
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#define GENERATED_EVENT_MAGIC ((Bool) 0x547321ac) |
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/* |
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* Forward declarations for procedures defined in this file: |
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*/ |
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static DisplayFocusInfo *FindDisplayFocusInfo _ANSI_ARGS_((TkMainInfo *mainPtr, |
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TkDisplay *dispPtr)); |
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static void FocusMapProc _ANSI_ARGS_((ClientData clientData, |
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XEvent *eventPtr)); |
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static void GenerateFocusEvents _ANSI_ARGS_((TkWindow *sourcePtr, |
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TkWindow *destPtr)); |
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/* |
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*-------------------------------------------------------------- |
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* |
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* Tk_FocusObjCmd -- |
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* |
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* This procedure is invoked to process the "focus" Tcl command. |
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* See the user documentation for details on what it does. |
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* |
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* Results: |
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* A standard Tcl result. |
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* |
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* Side effects: |
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* See the user documentation. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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int |
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Tk_FocusObjCmd(clientData, interp, objc, objv) |
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ClientData clientData; /* Main window associated with |
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* interpreter. */ |
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Tcl_Interp *interp; /* Current interpreter. */ |
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int objc; /* Number of arguments. */ |
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Tcl_Obj *CONST objv[]; /* Argument objects. */ |
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{ |
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static char *focusOptions[] = {"-displayof", "-force", "-lastfor", |
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(char *) NULL}; |
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Tk_Window tkwin = (Tk_Window) clientData; |
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TkWindow *winPtr = (TkWindow *) clientData; |
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TkWindow *newPtr, *focusWinPtr, *topLevelPtr; |
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ToplevelFocusInfo *tlFocusPtr; |
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char *windowName; |
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int index; |
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/* |
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* If invoked with no arguments, just return the current focus window. |
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*/ |
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if (objc == 1) { |
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focusWinPtr = TkGetFocusWin(winPtr); |
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if (focusWinPtr != NULL) { |
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Tcl_SetResult(interp, focusWinPtr->pathName, TCL_STATIC); |
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} |
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return TCL_OK; |
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} |
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/* |
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* If invoked with a single argument beginning with "." then focus |
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* on that window. |
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*/ |
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if (objc == 2) { |
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windowName = Tcl_GetStringFromObj(objv[1], (int *) NULL); |
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/* |
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* The empty string case exists for backwards compatibility. |
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*/ |
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if (windowName[0] == '\0') { |
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return TCL_OK; |
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} |
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if (windowName[0] == '.') { |
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newPtr = (TkWindow *) Tk_NameToWindow(interp, windowName, tkwin); |
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if (newPtr == NULL) { |
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return TCL_ERROR; |
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} |
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if (!(newPtr->flags & TK_ALREADY_DEAD)) { |
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TkSetFocusWin(newPtr, 0); |
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} |
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return TCL_OK; |
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} |
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} |
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if (Tcl_GetIndexFromObj(interp, objv[1], focusOptions, "option", 0, |
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&index) != TCL_OK) { |
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return TCL_ERROR; |
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} |
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if (objc != 3) { |
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Tcl_WrongNumArgs(interp, 2, objv, "window"); |
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return TCL_ERROR; |
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} |
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switch (index) { |
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case 0: { /* -displayof */ |
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windowName = Tcl_GetStringFromObj(objv[2], (int *) NULL); |
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newPtr = (TkWindow *) Tk_NameToWindow(interp, windowName, tkwin); |
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if (newPtr == NULL) { |
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return TCL_ERROR; |
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} |
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newPtr = TkGetFocusWin(newPtr); |
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if (newPtr != NULL) { |
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Tcl_SetResult(interp, newPtr->pathName, TCL_STATIC); |
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} |
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break; |
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} |
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case 1: { /* -force */ |
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windowName = Tcl_GetStringFromObj(objv[2], (int *) NULL); |
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/* |
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* The empty string case exists for backwards compatibility. |
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*/ |
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if (windowName[0] == '\0') { |
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return TCL_OK; |
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} |
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newPtr = (TkWindow *) Tk_NameToWindow(interp, windowName, tkwin); |
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if (newPtr == NULL) { |
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return TCL_ERROR; |
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} |
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TkSetFocusWin(newPtr, 1); |
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break; |
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} |
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case 2: { /* -lastfor */ |
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windowName = Tcl_GetStringFromObj(objv[2], (int *) NULL); |
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newPtr = (TkWindow *) Tk_NameToWindow(interp, windowName, tkwin); |
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if (newPtr == NULL) { |
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return TCL_ERROR; |
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} |
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for (topLevelPtr = newPtr; topLevelPtr != NULL; |
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topLevelPtr = topLevelPtr->parentPtr) { |
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if (topLevelPtr->flags & TK_TOP_LEVEL) { |
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for (tlFocusPtr = newPtr->mainPtr->tlFocusPtr; |
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tlFocusPtr != NULL; |
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tlFocusPtr = tlFocusPtr->nextPtr) { |
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if (tlFocusPtr->topLevelPtr == topLevelPtr) { |
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Tcl_SetResult(interp, |
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tlFocusPtr->focusWinPtr->pathName, |
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TCL_STATIC); |
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return TCL_OK; |
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} |
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} |
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Tcl_SetResult(interp, topLevelPtr->pathName, TCL_STATIC); |
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return TCL_OK; |
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} |
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} |
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break; |
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} |
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default: { |
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panic("bad const entries to focusOptions in focus command"); |
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} |
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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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* TkFocusFilterEvent -- |
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* |
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* This procedure is invoked by Tk_HandleEvent when it encounters |
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* a FocusIn, FocusOut, Enter, or Leave event. |
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* |
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* Results: |
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* A return value of 1 means that Tk_HandleEvent should process |
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* the event normally (i.e. event handlers should be invoked). |
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* A return value of 0 means that this event should be ignored. |
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* |
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* Side effects: |
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* Additional events may be generated, and the focus may switch. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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int |
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TkFocusFilterEvent(winPtr, eventPtr) |
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TkWindow *winPtr; /* Window that focus event is directed to. */ |
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XEvent *eventPtr; /* FocusIn, FocusOut, Enter, or Leave |
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* event. */ |
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{ |
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/* |
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* Design notes: the window manager and X server work together to |
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* transfer the focus among top-level windows. This procedure takes |
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* care of transferring the focus from a top-level or wrapper window |
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* to the actual window within that top-level that has the focus. |
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* We do this by synthesizing X events to move the focus around. |
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* None of the FocusIn and FocusOut events generated by X are ever |
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* used outside of this procedure; only the synthesized events get |
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* through to the rest of the application. At one point (e.g. |
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* Tk4.0b1) Tk used to call X to move the focus from a top-level to |
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* one of its descendants, then just pass through the events |
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* generated by X. This approach didn't work very well, for a |
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* variety of reasons. For example, if X generates the events they |
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* go at the back of the event queue, which could cause problems if |
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* other things have already happened, such as moving the focus to |
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* yet another window. |
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*/ |
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ToplevelFocusInfo *tlFocusPtr; |
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DisplayFocusInfo *displayFocusPtr; |
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TkDisplay *dispPtr = winPtr->dispPtr; |
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TkWindow *newFocusPtr; |
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int retValue, delta; |
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/* |
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* If this was a generated event, just turn off the generated |
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* flag and pass the event through to Tk bindings. |
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*/ |
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if (eventPtr->xfocus.send_event == GENERATED_EVENT_MAGIC) { |
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eventPtr->xfocus.send_event = 0; |
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return 1; |
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} |
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/* |
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* Check for special events generated by embedded applications to |
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* request the input focus. If this is one of those events, make |
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* the change in focus and return without any additional processing |
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* of the event (note: the "detail" field of the event indicates |
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* whether to claim the focus even if we don't already have it). |
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*/ |
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if ((eventPtr->xfocus.mode == EMBEDDED_APP_WANTS_FOCUS) |
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&& (eventPtr->type == FocusIn)) { |
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TkSetFocusWin(winPtr, eventPtr->xfocus.detail); |
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return 0; |
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} |
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/* |
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* This was not a generated event. We'll return 1 (so that the |
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* event will be processed) if it's an Enter or Leave event, and |
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* 0 (so that the event won't be processed) if it's a FocusIn or |
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* FocusOut event. |
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*/ |
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retValue = 0; |
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displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
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if (eventPtr->type == FocusIn) { |
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/* |
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* Skip FocusIn events that cause confusion |
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* NotifyVirtual and NotifyNonlinearVirtual - Virtual events occur |
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* on windows in between the origin and destination of the |
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* focus change. For FocusIn we may see this when focus |
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* goes into an embedded child. We don't care about this, |
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* although we may end up getting a NotifyPointer later. |
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* NotifyInferior - focus is coming to us from an embedded child. |
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* When focus is on an embeded focus, we still think we have |
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* the focus, too, so this message doesn't change our state. |
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* NotifyPointerRoot - should never happen because this is sent |
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* to the root window. |
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* |
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* Interesting FocusIn events are |
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* NotifyAncestor - focus is coming from our parent, probably the root. |
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* NotifyNonlinear - focus is coming from a different branch, probably |
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* another toplevel. |
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* NotifyPointer - implicit focus because of the mouse position. |
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* This is only interesting on toplevels, when it means that the |
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* focus has been set to the root window but the mouse is over |
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* this toplevel. We take the focus implicitly (probably no |
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* window manager) |
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*/ |
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if ((eventPtr->xfocus.detail == NotifyVirtual) |
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|| (eventPtr->xfocus.detail == NotifyNonlinearVirtual) |
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|| (eventPtr->xfocus.detail == NotifyPointerRoot) |
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|| (eventPtr->xfocus.detail == NotifyInferior)) { |
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return retValue; |
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} |
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} else if (eventPtr->type == FocusOut) { |
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/* |
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* Skip FocusOut events that cause confusion. |
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* NotifyPointer - the pointer is in us or a child, and we are losing |
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* focus because of an XSetInputFocus. Other focus events |
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* will set our state properly. |
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* NotifyPointerRoot - should never happen because this is sent |
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* to the root window. |
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* NotifyInferior - focus leaving us for an embedded child. We |
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* retain a notion of focus when an embedded child has focus. |
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* |
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* Interesting events are: |
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* NotifyAncestor - focus is going to root. |
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* NotifyNonlinear - focus is going to another branch, probably |
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* another toplevel. |
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* NotifyVirtual, NotifyNonlinearVirtual - focus is passing through, |
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* and we need to make sure we track this. |
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*/ |
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if ((eventPtr->xfocus.detail == NotifyPointer) |
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|| (eventPtr->xfocus.detail == NotifyPointerRoot) |
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|| (eventPtr->xfocus.detail == NotifyInferior)) { |
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return retValue; |
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} |
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} else { |
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retValue = 1; |
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if (eventPtr->xcrossing.detail == NotifyInferior) { |
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return retValue; |
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} |
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} |
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/* |
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* If winPtr isn't a top-level window than just ignore the event. |
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*/ |
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winPtr = TkWmFocusToplevel(winPtr); |
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if (winPtr == NULL) { |
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return retValue; |
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} |
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/* |
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* If there is a grab in effect and this window is outside the |
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* grabbed tree, then ignore the event. |
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*/ |
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if (TkGrabState(winPtr) == TK_GRAB_EXCLUDED) { |
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return retValue; |
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} |
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/* |
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* It is possible that there were outstanding FocusIn and FocusOut |
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* events on their way to us at the time the focus was changed |
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* internally with the "focus" command. If so, these events could |
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* potentially cause us to lose the focus (switch it to the window |
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* of the last FocusIn event) even though the focus change occurred |
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* after those events. The following code detects this and ignores |
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* the stale events. |
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* |
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* Note: the focusSerial is only generated by TkpChangeFocus, |
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* whereas in Tk 4.2 there was always a nop marker generated. |
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*/ |
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delta = eventPtr->xfocus.serial - displayFocusPtr->focusSerial; |
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if (delta < 0) { |
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return retValue; |
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} |
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/* |
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* Find the ToplevelFocusInfo structure for the window, and make a new one |
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* if there isn't one already. |
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*/ |
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for (tlFocusPtr = winPtr->mainPtr->tlFocusPtr; tlFocusPtr != NULL; |
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tlFocusPtr = tlFocusPtr->nextPtr) { |
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if (tlFocusPtr->topLevelPtr == winPtr) { |
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break; |
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} |
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} |
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if (tlFocusPtr == NULL) { |
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tlFocusPtr = (ToplevelFocusInfo *) ckalloc(sizeof(ToplevelFocusInfo)); |
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tlFocusPtr->topLevelPtr = tlFocusPtr->focusWinPtr = winPtr; |
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tlFocusPtr->nextPtr = winPtr->mainPtr->tlFocusPtr; |
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winPtr->mainPtr->tlFocusPtr = tlFocusPtr; |
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} |
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newFocusPtr = tlFocusPtr->focusWinPtr; |
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if (eventPtr->type == FocusIn) { |
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GenerateFocusEvents(displayFocusPtr->focusWinPtr, newFocusPtr); |
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displayFocusPtr->focusWinPtr = newFocusPtr; |
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dispPtr->focusPtr = newFocusPtr; |
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/* |
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* NotifyPointer gets set when the focus has been set to the root window |
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* but we have the pointer. We'll treat this like an implicit |
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* focus in event so that upon Leave events we release focus. |
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*/ |
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if (!(winPtr->flags & TK_EMBEDDED)) { |
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if (eventPtr->xfocus.detail == NotifyPointer) { |
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dispPtr->implicitWinPtr = winPtr; |
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} else { |
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dispPtr->implicitWinPtr = NULL; |
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} |
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} |
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} else if (eventPtr->type == FocusOut) { |
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GenerateFocusEvents(displayFocusPtr->focusWinPtr, (TkWindow *) NULL); |
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/* |
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* Reset dispPtr->focusPtr, but only if it currently is the same |
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* as this application's focusWinPtr: this check is needed to |
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* handle embedded applications in the same process. |
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*/ |
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if (dispPtr->focusPtr == displayFocusPtr->focusWinPtr) { |
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dispPtr->focusPtr = NULL; |
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} |
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displayFocusPtr->focusWinPtr = NULL; |
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} else if (eventPtr->type == EnterNotify) { |
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/* |
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|
* If there is no window manager, or if the window manager isn't |
|
|
* moving the focus around (e.g. the disgusting "NoTitleFocus" |
|
|
* option has been selected in twm), then we won't get FocusIn |
|
|
* or FocusOut events. Instead, the "focus" field will be set |
|
|
* in an Enter event to indicate that we've already got the focus |
|
|
* when the mouse enters the window (even though we didn't get |
|
|
* a FocusIn event). Watch for this and grab the focus when it |
|
|
* happens. Note: if this is an embedded application then don't |
|
|
* accept the focus implicitly like this; the container |
|
|
* application will give us the focus explicitly if it wants us |
|
|
* to have it. |
|
|
*/ |
|
|
|
|
|
if (eventPtr->xcrossing.focus && |
|
|
(displayFocusPtr->focusWinPtr == NULL) |
|
|
&& !(winPtr->flags & TK_EMBEDDED)) { |
|
|
if (dispPtr->focusDebug) { |
|
|
printf("Focussed implicitly on %s\n", |
|
|
newFocusPtr->pathName); |
|
|
} |
|
|
|
|
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, newFocusPtr); |
|
|
displayFocusPtr->focusWinPtr = newFocusPtr; |
|
|
dispPtr->implicitWinPtr = winPtr; |
|
|
dispPtr->focusPtr = newFocusPtr; |
|
|
} |
|
|
} else if (eventPtr->type == LeaveNotify) { |
|
|
/* |
|
|
* If the pointer just left a window for which we automatically |
|
|
* claimed the focus on enter, move the focus back to the root |
|
|
* window, where it was before we claimed it above. Note: |
|
|
* dispPtr->implicitWinPtr may not be the same as |
|
|
* displayFocusPtr->focusWinPtr (e.g. because the "focus" |
|
|
* command was used to redirect the focus after it arrived at |
|
|
* dispPtr->implicitWinPtr)!! In addition, we generate events |
|
|
* because the window manager won't give us a FocusOut event when |
|
|
* we focus on the root. |
|
|
*/ |
|
|
|
|
|
if ((dispPtr->implicitWinPtr != NULL) |
|
|
&& !(winPtr->flags & TK_EMBEDDED)) { |
|
|
if (dispPtr->focusDebug) { |
|
|
printf("Defocussed implicit Async\n"); |
|
|
} |
|
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, |
|
|
(TkWindow *) NULL); |
|
|
XSetInputFocus(dispPtr->display, PointerRoot, RevertToPointerRoot, |
|
|
CurrentTime); |
|
|
displayFocusPtr->focusWinPtr = NULL; |
|
|
dispPtr->implicitWinPtr = NULL; |
|
|
} |
|
|
} |
|
|
return retValue; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkSetFocusWin -- |
|
|
* |
|
|
* This procedure is invoked to change the focus window for a |
|
|
* given display in a given application. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Event handlers may be invoked to process the change of |
|
|
* focus. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TkSetFocusWin(winPtr, force) |
|
|
TkWindow *winPtr; /* Window that is to be the new focus for |
|
|
* its display and application. */ |
|
|
int force; /* If non-zero, set the X focus to this |
|
|
* window even if the application doesn't |
|
|
* currently have the X focus. */ |
|
|
{ |
|
|
ToplevelFocusInfo *tlFocusPtr; |
|
|
DisplayFocusInfo *displayFocusPtr; |
|
|
TkWindow *topLevelPtr; |
|
|
int allMapped, serial; |
|
|
|
|
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
|
|
|
|
|
/* |
|
|
* If force is set, we should make sure we grab the focus regardless |
|
|
* of the current focus window since under Windows, we may need to |
|
|
* take control away from another application. |
|
|
*/ |
|
|
|
|
|
if (winPtr == displayFocusPtr->focusWinPtr && !force) { |
|
|
return; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Find the top-level window for winPtr, then find (or create) |
|
|
* a record for the top-level. Also see whether winPtr and all its |
|
|
* ancestors are mapped. |
|
|
*/ |
|
|
|
|
|
allMapped = 1; |
|
|
for (topLevelPtr = winPtr; ; topLevelPtr = topLevelPtr->parentPtr) { |
|
|
if (topLevelPtr == NULL) { |
|
|
/* |
|
|
* The window is being deleted. No point in worrying about |
|
|
* giving it the focus. |
|
|
*/ |
|
|
return; |
|
|
} |
|
|
if (!(topLevelPtr->flags & TK_MAPPED)) { |
|
|
allMapped = 0; |
|
|
} |
|
|
if (topLevelPtr->flags & TK_TOP_LEVEL) { |
|
|
break; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the new focus window isn't mapped, then we can't focus on it |
|
|
* (X will generate an error, for example). Instead, create an |
|
|
* event handler that will set the focus to this window once it gets |
|
|
* mapped. At the same time, delete any old handler that might be |
|
|
* around; it's no longer relevant. |
|
|
*/ |
|
|
|
|
|
if (displayFocusPtr->focusOnMapPtr != NULL) { |
|
|
Tk_DeleteEventHandler( |
|
|
(Tk_Window) displayFocusPtr->focusOnMapPtr, |
|
|
StructureNotifyMask, FocusMapProc, |
|
|
(ClientData) displayFocusPtr->focusOnMapPtr); |
|
|
displayFocusPtr->focusOnMapPtr = NULL; |
|
|
} |
|
|
if (!allMapped) { |
|
|
Tk_CreateEventHandler((Tk_Window) winPtr, |
|
|
VisibilityChangeMask, FocusMapProc, |
|
|
(ClientData) winPtr); |
|
|
displayFocusPtr->focusOnMapPtr = winPtr; |
|
|
displayFocusPtr->forceFocus = force; |
|
|
return; |
|
|
} |
|
|
|
|
|
for (tlFocusPtr = winPtr->mainPtr->tlFocusPtr; tlFocusPtr != NULL; |
|
|
tlFocusPtr = tlFocusPtr->nextPtr) { |
|
|
if (tlFocusPtr->topLevelPtr == topLevelPtr) { |
|
|
break; |
|
|
} |
|
|
} |
|
|
if (tlFocusPtr == NULL) { |
|
|
tlFocusPtr = (ToplevelFocusInfo *) ckalloc(sizeof(ToplevelFocusInfo)); |
|
|
tlFocusPtr->topLevelPtr = topLevelPtr; |
|
|
tlFocusPtr->nextPtr = winPtr->mainPtr->tlFocusPtr; |
|
|
winPtr->mainPtr->tlFocusPtr = tlFocusPtr; |
|
|
} |
|
|
tlFocusPtr->focusWinPtr = winPtr; |
|
|
|
|
|
/* |
|
|
* Reset the window system's focus window and generate focus events, |
|
|
* with two special cases: |
|
|
* |
|
|
* 1. If the application is embedded and doesn't currently have the |
|
|
* focus, don't set the focus directly. Instead, see if the |
|
|
* embedding code can claim the focus from the enclosing |
|
|
* container. |
|
|
* 2. Otherwise, if the application doesn't currently have the |
|
|
* focus, don't change the window system's focus unless it was |
|
|
* already in this application or "force" was specified. |
|
|
*/ |
|
|
|
|
|
if ((topLevelPtr->flags & TK_EMBEDDED) |
|
|
&& (displayFocusPtr->focusWinPtr == NULL)) { |
|
|
TkpClaimFocus(topLevelPtr, force); |
|
|
} else if ((displayFocusPtr->focusWinPtr != NULL) || force) { |
|
|
/* |
|
|
* Generate events to shift focus between Tk windows. |
|
|
* We do this regardless of what TkpChangeFocus does with |
|
|
* the real X focus so that Tk widgets track focus commands |
|
|
* when there is no window manager. GenerateFocusEvents will |
|
|
* set up a serial number marker so we discard focus events |
|
|
* that are triggered by the ChangeFocus. |
|
|
*/ |
|
|
|
|
|
serial = TkpChangeFocus(TkpGetWrapperWindow(topLevelPtr), force); |
|
|
if (serial != 0) { |
|
|
displayFocusPtr->focusSerial = serial; |
|
|
} |
|
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, winPtr); |
|
|
displayFocusPtr->focusWinPtr = winPtr; |
|
|
winPtr->dispPtr->focusPtr = winPtr; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkGetFocusWin -- |
|
|
* |
|
|
* Given a window, this procedure returns the current focus |
|
|
* window for its application and display. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a pointer to the window that currently |
|
|
* has the input focus for the specified application and |
|
|
* display, or NULL if none. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
TkWindow * |
|
|
TkGetFocusWin(winPtr) |
|
|
TkWindow *winPtr; /* Window that selects an application |
|
|
* and a display. */ |
|
|
{ |
|
|
DisplayFocusInfo *displayFocusPtr; |
|
|
|
|
|
if (winPtr == NULL) { |
|
|
return (TkWindow *) NULL; |
|
|
} |
|
|
|
|
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
|
|
return displayFocusPtr->focusWinPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkFocusKeyEvent -- |
|
|
* |
|
|
* Given a window and a key press or release event that arrived for |
|
|
* the window, use information about the keyboard focus to compute |
|
|
* which window should really get the event. In addition, update |
|
|
* the event to refer to its new window. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a pointer to the window that has the input |
|
|
* focus in winPtr's application, or NULL if winPtr's application |
|
|
* doesn't have the input focus. If a non-NULL value is returned, |
|
|
* eventPtr will be updated to refer properly to the focus window. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
TkWindow * |
|
|
TkFocusKeyEvent(winPtr, eventPtr) |
|
|
TkWindow *winPtr; /* Window that selects an application |
|
|
* and a display. */ |
|
|
XEvent *eventPtr; /* X event to redirect (should be KeyPress |
|
|
* or KeyRelease). */ |
|
|
{ |
|
|
DisplayFocusInfo *displayFocusPtr; |
|
|
TkWindow *focusWinPtr; |
|
|
int focusX, focusY, vRootX, vRootY, vRootWidth, vRootHeight; |
|
|
|
|
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
|
|
focusWinPtr = displayFocusPtr->focusWinPtr; |
|
|
|
|
|
/* |
|
|
* The code below is a debugging aid to make sure that dispPtr->focusPtr |
|
|
* is kept properly in sync with the "truth", which is the value in |
|
|
* displayFocusPtr->focusWinPtr. |
|
|
*/ |
|
|
|
|
|
#ifdef TCL_MEM_DEBUG |
|
|
if (focusWinPtr != winPtr->dispPtr->focusPtr) { |
|
|
printf("TkFocusKeyEvent found dispPtr->focusPtr out of sync:\n"); |
|
|
printf("expected %s, got %s\n", |
|
|
(focusWinPtr != NULL) ? focusWinPtr->pathName : "??", |
|
|
(winPtr->dispPtr->focusPtr != NULL) ? |
|
|
winPtr->dispPtr->focusPtr->pathName : "??"); |
|
|
} |
|
|
#endif |
|
|
|
|
|
if ((focusWinPtr != NULL) && (focusWinPtr->mainPtr == winPtr->mainPtr)) { |
|
|
/* |
|
|
* Map the x and y coordinates to make sense in the context of |
|
|
* the focus window, if possible (make both -1 if the map-from |
|
|
* and map-to windows don't share the same screen). |
|
|
*/ |
|
|
|
|
|
if ((focusWinPtr->display != winPtr->display) |
|
|
|| (focusWinPtr->screenNum != winPtr->screenNum)) { |
|
|
eventPtr->xkey.x = -1; |
|
|
eventPtr->xkey.y = -1; |
|
|
} else { |
|
|
Tk_GetVRootGeometry((Tk_Window) focusWinPtr, &vRootX, &vRootY, |
|
|
&vRootWidth, &vRootHeight); |
|
|
Tk_GetRootCoords((Tk_Window) focusWinPtr, &focusX, &focusY); |
|
|
eventPtr->xkey.x = eventPtr->xkey.x_root - vRootX - focusX; |
|
|
eventPtr->xkey.y = eventPtr->xkey.y_root - vRootY - focusY; |
|
|
} |
|
|
eventPtr->xkey.window = focusWinPtr->window; |
|
|
return focusWinPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* The event doesn't belong to us. Perhaps, due to embedding, it |
|
|
* really belongs to someone else. Give the embedding code a chance |
|
|
* to redirect the event. |
|
|
*/ |
|
|
|
|
|
TkpRedirectKeyEvent(winPtr, eventPtr); |
|
|
return (TkWindow *) NULL; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkFocusDeadWindow -- |
|
|
* |
|
|
* This procedure is invoked when it is determined that |
|
|
* a window is dead. It cleans up focus-related information |
|
|
* about the window. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Various things get cleaned up and recycled. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TkFocusDeadWindow(winPtr) |
|
|
register TkWindow *winPtr; /* Information about the window |
|
|
* that is being deleted. */ |
|
|
{ |
|
|
ToplevelFocusInfo *tlFocusPtr, *prevPtr; |
|
|
DisplayFocusInfo *displayFocusPtr; |
|
|
TkDisplay *dispPtr = winPtr->dispPtr; |
|
|
|
|
|
/* |
|
|
* Search for focus records that refer to this window either as |
|
|
* the top-level window or the current focus window. |
|
|
*/ |
|
|
|
|
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
|
|
for (prevPtr = NULL, tlFocusPtr = winPtr->mainPtr->tlFocusPtr; |
|
|
tlFocusPtr != NULL; |
|
|
prevPtr = tlFocusPtr, tlFocusPtr = tlFocusPtr->nextPtr) { |
|
|
if (winPtr == tlFocusPtr->topLevelPtr) { |
|
|
/* |
|
|
* The top-level window is the one being deleted: free |
|
|
* the focus record and release the focus back to PointerRoot |
|
|
* if we acquired it implicitly. |
|
|
*/ |
|
|
|
|
|
if (dispPtr->implicitWinPtr == winPtr) { |
|
|
if (dispPtr->focusDebug) { |
|
|
printf("releasing focus to root after %s died\n", |
|
|
tlFocusPtr->topLevelPtr->pathName); |
|
|
} |
|
|
dispPtr->implicitWinPtr = NULL; |
|
|
displayFocusPtr->focusWinPtr = NULL; |
|
|
dispPtr->focusPtr = NULL; |
|
|
} |
|
|
if (displayFocusPtr->focusWinPtr == tlFocusPtr->focusWinPtr) { |
|
|
displayFocusPtr->focusWinPtr = NULL; |
|
|
dispPtr->focusPtr = NULL; |
|
|
} |
|
|
if (prevPtr == NULL) { |
|
|
winPtr->mainPtr->tlFocusPtr = tlFocusPtr->nextPtr; |
|
|
} else { |
|
|
prevPtr->nextPtr = tlFocusPtr->nextPtr; |
|
|
} |
|
|
ckfree((char *) tlFocusPtr); |
|
|
break; |
|
|
} else if (winPtr == tlFocusPtr->focusWinPtr) { |
|
|
/* |
|
|
* The deleted window had the focus for its top-level: |
|
|
* move the focus to the top-level itself. |
|
|
*/ |
|
|
|
|
|
tlFocusPtr->focusWinPtr = tlFocusPtr->topLevelPtr; |
|
|
if ((displayFocusPtr->focusWinPtr == winPtr) |
|
|
&& !(tlFocusPtr->topLevelPtr->flags & TK_ALREADY_DEAD)) { |
|
|
if (dispPtr->focusDebug) { |
|
|
printf("forwarding focus to %s after %s died\n", |
|
|
tlFocusPtr->topLevelPtr->pathName, |
|
|
winPtr->pathName); |
|
|
} |
|
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, |
|
|
tlFocusPtr->topLevelPtr); |
|
|
displayFocusPtr->focusWinPtr = tlFocusPtr->topLevelPtr; |
|
|
dispPtr->focusPtr = tlFocusPtr->topLevelPtr; |
|
|
} |
|
|
break; |
|
|
} |
|
|
} |
|
|
|
|
|
if (displayFocusPtr->focusOnMapPtr == winPtr) { |
|
|
displayFocusPtr->focusOnMapPtr = NULL; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* GenerateFocusEvents -- |
|
|
* |
|
|
* This procedure is called to create FocusIn and FocusOut events to |
|
|
* move the input focus from one window to another. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* FocusIn and FocusOut events are generated. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
GenerateFocusEvents(sourcePtr, destPtr) |
|
|
TkWindow *sourcePtr; /* Window that used to have the focus (may |
|
|
* be NULL). */ |
|
|
TkWindow *destPtr; /* New window to have the focus (may be |
|
|
* NULL). */ |
|
|
|
|
|
{ |
|
|
XEvent event; |
|
|
TkWindow *winPtr; |
|
|
|
|
|
winPtr = sourcePtr; |
|
|
if (winPtr == NULL) { |
|
|
winPtr = destPtr; |
|
|
if (winPtr == NULL) { |
|
|
return; |
|
|
} |
|
|
} |
|
|
|
|
|
event.xfocus.serial = LastKnownRequestProcessed(winPtr->display); |
|
|
event.xfocus.send_event = GENERATED_EVENT_MAGIC; |
|
|
event.xfocus.display = winPtr->display; |
|
|
event.xfocus.mode = NotifyNormal; |
|
|
TkInOutEvents(&event, sourcePtr, destPtr, FocusOut, FocusIn, |
|
|
TCL_QUEUE_MARK); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* FocusMapProc -- |
|
|
* |
|
|
* This procedure is called as an event handler for VisibilityNotify |
|
|
* events, if a window receives the focus at a time when its |
|
|
* toplevel isn't mapped. The procedure is needed because X |
|
|
* won't allow the focus to be set to an unmapped window; we |
|
|
* detect when the toplevel is mapped and set the focus to it then. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* If this is a map event, the focus gets set to the toplevel |
|
|
* given by clientData. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
FocusMapProc(clientData, eventPtr) |
|
|
ClientData clientData; /* Toplevel window. */ |
|
|
XEvent *eventPtr; /* Information about event. */ |
|
|
{ |
|
|
TkWindow *winPtr = (TkWindow *) clientData; |
|
|
DisplayFocusInfo *displayFocusPtr; |
|
|
|
|
|
if (eventPtr->type == VisibilityNotify) { |
|
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, |
|
|
winPtr->dispPtr); |
|
|
if (winPtr->dispPtr->focusDebug) { |
|
|
printf("auto-focussing on %s, force %d\n", winPtr->pathName, |
|
|
displayFocusPtr->forceFocus); |
|
|
} |
|
|
Tk_DeleteEventHandler((Tk_Window) winPtr, VisibilityChangeMask, |
|
|
FocusMapProc, clientData); |
|
|
displayFocusPtr->focusOnMapPtr = NULL; |
|
|
TkSetFocusWin(winPtr, displayFocusPtr->forceFocus); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* FindDisplayFocusInfo -- |
|
|
* |
|
|
* Given an application and a display, this procedure locate the |
|
|
* focus record for that combination. If no such record exists, |
|
|
* it creates a new record and initializes it. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a pointer to the record. |
|
|
* |
|
|
* Side effects: |
|
|
* A new record will be allocated if there wasn't one already. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static DisplayFocusInfo * |
|
|
FindDisplayFocusInfo(mainPtr, dispPtr) |
|
|
TkMainInfo *mainPtr; /* Record that identifies a particular |
|
|
* application. */ |
|
|
TkDisplay *dispPtr; /* Display whose focus information is |
|
|
* needed. */ |
|
|
{ |
|
|
DisplayFocusInfo *displayFocusPtr; |
|
|
|
|
|
for (displayFocusPtr = mainPtr->displayFocusPtr; |
|
|
displayFocusPtr != NULL; |
|
|
displayFocusPtr = displayFocusPtr->nextPtr) { |
|
|
if (displayFocusPtr->dispPtr == dispPtr) { |
|
|
return displayFocusPtr; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
* The record doesn't exist yet. Make a new one. |
|
|
*/ |
|
|
|
|
|
displayFocusPtr = (DisplayFocusInfo *) ckalloc(sizeof(DisplayFocusInfo)); |
|
|
displayFocusPtr->dispPtr = dispPtr; |
|
|
displayFocusPtr->focusWinPtr = NULL; |
|
|
displayFocusPtr->focusOnMapPtr = NULL; |
|
|
displayFocusPtr->forceFocus = 0; |
|
|
displayFocusPtr->focusSerial = 0; |
|
|
displayFocusPtr->nextPtr = mainPtr->displayFocusPtr; |
|
|
mainPtr->displayFocusPtr = displayFocusPtr; |
|
|
return displayFocusPtr; |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tkFocus.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 2:49a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TKFOCUS.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
|
| 3 |
|
/* |
| 4 |
|
* tkFocus.c -- |
| 5 |
|
* |
| 6 |
|
* This file contains procedures that manage the input |
| 7 |
|
* focus for Tk. |
| 8 |
|
* |
| 9 |
|
* Copyright (c) 1990-1994 The Regents of the University of California. |
| 10 |
|
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
| 11 |
|
* |
| 12 |
|
* See the file "license.terms" for information on usage and redistribution |
| 13 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 14 |
|
* |
| 15 |
|
* RCS: @(#) $Id: tkfocus.c,v 1.1.1.1 2001/06/13 05:00:25 dtashley Exp $ |
| 16 |
|
*/ |
| 17 |
|
|
| 18 |
|
#include "tkInt.h" |
| 19 |
|
#include "tkPort.h" |
| 20 |
|
|
| 21 |
|
|
| 22 |
|
/* |
| 23 |
|
* For each top-level window that has ever received the focus, there |
| 24 |
|
* is a record of the following type: |
| 25 |
|
*/ |
| 26 |
|
|
| 27 |
|
typedef struct TkToplevelFocusInfo { |
| 28 |
|
TkWindow *topLevelPtr; /* Information about top-level window. */ |
| 29 |
|
TkWindow *focusWinPtr; /* The next time the focus comes to this |
| 30 |
|
* top-level, it will be given to this |
| 31 |
|
* window. */ |
| 32 |
|
struct TkToplevelFocusInfo *nextPtr; |
| 33 |
|
/* Next in list of all toplevel focus records |
| 34 |
|
* for a given application. */ |
| 35 |
|
} ToplevelFocusInfo; |
| 36 |
|
|
| 37 |
|
/* |
| 38 |
|
* One of the following structures exists for each display used by |
| 39 |
|
* each application. These are linked together from the TkMainInfo |
| 40 |
|
* structure. These structures are needed because it isn't |
| 41 |
|
* sufficient to store a single piece of focus information in each |
| 42 |
|
* display or in each application: we need the cross-product. |
| 43 |
|
* There needs to be separate information for each display, because |
| 44 |
|
* it's possible to have multiple focus windows active simultaneously |
| 45 |
|
* on different displays. There also needs to be separate information |
| 46 |
|
* for each application, because of embedding: if an embedded |
| 47 |
|
* application has the focus, its container application also has |
| 48 |
|
* the focus. Thus we keep a list of structures for each application: |
| 49 |
|
* the same display can appear in structures for several applications |
| 50 |
|
* at once. |
| 51 |
|
*/ |
| 52 |
|
|
| 53 |
|
typedef struct TkDisplayFocusInfo { |
| 54 |
|
TkDisplay *dispPtr; /* Display that this information pertains |
| 55 |
|
* to. */ |
| 56 |
|
struct TkWindow *focusWinPtr; |
| 57 |
|
/* Window that currently has the focus for |
| 58 |
|
* this application on this display, or NULL |
| 59 |
|
* if none. */ |
| 60 |
|
struct TkWindow *focusOnMapPtr; |
| 61 |
|
/* This points to a toplevel window that is |
| 62 |
|
* supposed to receive the X input focus as |
| 63 |
|
* soon as it is mapped (needed to handle the |
| 64 |
|
* fact that X won't allow the focus on an |
| 65 |
|
* unmapped window). NULL means no delayed |
| 66 |
|
* focus op in progress for this display. */ |
| 67 |
|
int forceFocus; /* Associated with focusOnMapPtr: non-zero |
| 68 |
|
* means claim the focus even if some other |
| 69 |
|
* application currently has it. */ |
| 70 |
|
unsigned long focusSerial; /* Serial number of last request this |
| 71 |
|
* application made to change the focus on |
| 72 |
|
* this display. Used to identify stale |
| 73 |
|
* focus notifications coming from the |
| 74 |
|
* X server. */ |
| 75 |
|
struct TkDisplayFocusInfo *nextPtr; |
| 76 |
|
/* Next in list of all display focus |
| 77 |
|
* records for a given application. */ |
| 78 |
|
} DisplayFocusInfo; |
| 79 |
|
|
| 80 |
|
/* |
| 81 |
|
* The following magic value is stored in the "send_event" field of |
| 82 |
|
* FocusIn and FocusOut events that are generated in this file. This |
| 83 |
|
* allows us to separate "real" events coming from the server from |
| 84 |
|
* those that we generated. |
| 85 |
|
*/ |
| 86 |
|
|
| 87 |
|
#define GENERATED_EVENT_MAGIC ((Bool) 0x547321ac) |
| 88 |
|
|
| 89 |
|
/* |
| 90 |
|
* Forward declarations for procedures defined in this file: |
| 91 |
|
*/ |
| 92 |
|
|
| 93 |
|
|
| 94 |
|
static DisplayFocusInfo *FindDisplayFocusInfo _ANSI_ARGS_((TkMainInfo *mainPtr, |
| 95 |
|
TkDisplay *dispPtr)); |
| 96 |
|
static void FocusMapProc _ANSI_ARGS_((ClientData clientData, |
| 97 |
|
XEvent *eventPtr)); |
| 98 |
|
static void GenerateFocusEvents _ANSI_ARGS_((TkWindow *sourcePtr, |
| 99 |
|
TkWindow *destPtr)); |
| 100 |
|
|
| 101 |
|
/* |
| 102 |
|
*-------------------------------------------------------------- |
| 103 |
|
* |
| 104 |
|
* Tk_FocusObjCmd -- |
| 105 |
|
* |
| 106 |
|
* This procedure is invoked to process the "focus" Tcl command. |
| 107 |
|
* See the user documentation for details on what it does. |
| 108 |
|
* |
| 109 |
|
* Results: |
| 110 |
|
* A standard Tcl result. |
| 111 |
|
* |
| 112 |
|
* Side effects: |
| 113 |
|
* See the user documentation. |
| 114 |
|
* |
| 115 |
|
*-------------------------------------------------------------- |
| 116 |
|
*/ |
| 117 |
|
|
| 118 |
|
int |
| 119 |
|
Tk_FocusObjCmd(clientData, interp, objc, objv) |
| 120 |
|
ClientData clientData; /* Main window associated with |
| 121 |
|
* interpreter. */ |
| 122 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 123 |
|
int objc; /* Number of arguments. */ |
| 124 |
|
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 125 |
|
{ |
| 126 |
|
static char *focusOptions[] = {"-displayof", "-force", "-lastfor", |
| 127 |
|
(char *) NULL}; |
| 128 |
|
Tk_Window tkwin = (Tk_Window) clientData; |
| 129 |
|
TkWindow *winPtr = (TkWindow *) clientData; |
| 130 |
|
TkWindow *newPtr, *focusWinPtr, *topLevelPtr; |
| 131 |
|
ToplevelFocusInfo *tlFocusPtr; |
| 132 |
|
char *windowName; |
| 133 |
|
int index; |
| 134 |
|
|
| 135 |
|
/* |
| 136 |
|
* If invoked with no arguments, just return the current focus window. |
| 137 |
|
*/ |
| 138 |
|
|
| 139 |
|
if (objc == 1) { |
| 140 |
|
focusWinPtr = TkGetFocusWin(winPtr); |
| 141 |
|
if (focusWinPtr != NULL) { |
| 142 |
|
Tcl_SetResult(interp, focusWinPtr->pathName, TCL_STATIC); |
| 143 |
|
} |
| 144 |
|
return TCL_OK; |
| 145 |
|
} |
| 146 |
|
|
| 147 |
|
/* |
| 148 |
|
* If invoked with a single argument beginning with "." then focus |
| 149 |
|
* on that window. |
| 150 |
|
*/ |
| 151 |
|
|
| 152 |
|
if (objc == 2) { |
| 153 |
|
windowName = Tcl_GetStringFromObj(objv[1], (int *) NULL); |
| 154 |
|
|
| 155 |
|
/* |
| 156 |
|
* The empty string case exists for backwards compatibility. |
| 157 |
|
*/ |
| 158 |
|
|
| 159 |
|
if (windowName[0] == '\0') { |
| 160 |
|
return TCL_OK; |
| 161 |
|
} |
| 162 |
|
if (windowName[0] == '.') { |
| 163 |
|
newPtr = (TkWindow *) Tk_NameToWindow(interp, windowName, tkwin); |
| 164 |
|
if (newPtr == NULL) { |
| 165 |
|
return TCL_ERROR; |
| 166 |
|
} |
| 167 |
|
if (!(newPtr->flags & TK_ALREADY_DEAD)) { |
| 168 |
|
TkSetFocusWin(newPtr, 0); |
| 169 |
|
} |
| 170 |
|
return TCL_OK; |
| 171 |
|
} |
| 172 |
|
} |
| 173 |
|
|
| 174 |
|
if (Tcl_GetIndexFromObj(interp, objv[1], focusOptions, "option", 0, |
| 175 |
|
&index) != TCL_OK) { |
| 176 |
|
return TCL_ERROR; |
| 177 |
|
} |
| 178 |
|
if (objc != 3) { |
| 179 |
|
Tcl_WrongNumArgs(interp, 2, objv, "window"); |
| 180 |
|
return TCL_ERROR; |
| 181 |
|
} |
| 182 |
|
switch (index) { |
| 183 |
|
case 0: { /* -displayof */ |
| 184 |
|
windowName = Tcl_GetStringFromObj(objv[2], (int *) NULL); |
| 185 |
|
newPtr = (TkWindow *) Tk_NameToWindow(interp, windowName, tkwin); |
| 186 |
|
if (newPtr == NULL) { |
| 187 |
|
return TCL_ERROR; |
| 188 |
|
} |
| 189 |
|
newPtr = TkGetFocusWin(newPtr); |
| 190 |
|
if (newPtr != NULL) { |
| 191 |
|
Tcl_SetResult(interp, newPtr->pathName, TCL_STATIC); |
| 192 |
|
} |
| 193 |
|
break; |
| 194 |
|
} |
| 195 |
|
case 1: { /* -force */ |
| 196 |
|
windowName = Tcl_GetStringFromObj(objv[2], (int *) NULL); |
| 197 |
|
|
| 198 |
|
/* |
| 199 |
|
* The empty string case exists for backwards compatibility. |
| 200 |
|
*/ |
| 201 |
|
|
| 202 |
|
if (windowName[0] == '\0') { |
| 203 |
|
return TCL_OK; |
| 204 |
|
} |
| 205 |
|
newPtr = (TkWindow *) Tk_NameToWindow(interp, windowName, tkwin); |
| 206 |
|
if (newPtr == NULL) { |
| 207 |
|
return TCL_ERROR; |
| 208 |
|
} |
| 209 |
|
TkSetFocusWin(newPtr, 1); |
| 210 |
|
break; |
| 211 |
|
} |
| 212 |
|
case 2: { /* -lastfor */ |
| 213 |
|
windowName = Tcl_GetStringFromObj(objv[2], (int *) NULL); |
| 214 |
|
newPtr = (TkWindow *) Tk_NameToWindow(interp, windowName, tkwin); |
| 215 |
|
if (newPtr == NULL) { |
| 216 |
|
return TCL_ERROR; |
| 217 |
|
} |
| 218 |
|
for (topLevelPtr = newPtr; topLevelPtr != NULL; |
| 219 |
|
topLevelPtr = topLevelPtr->parentPtr) { |
| 220 |
|
if (topLevelPtr->flags & TK_TOP_LEVEL) { |
| 221 |
|
for (tlFocusPtr = newPtr->mainPtr->tlFocusPtr; |
| 222 |
|
tlFocusPtr != NULL; |
| 223 |
|
tlFocusPtr = tlFocusPtr->nextPtr) { |
| 224 |
|
if (tlFocusPtr->topLevelPtr == topLevelPtr) { |
| 225 |
|
Tcl_SetResult(interp, |
| 226 |
|
tlFocusPtr->focusWinPtr->pathName, |
| 227 |
|
TCL_STATIC); |
| 228 |
|
return TCL_OK; |
| 229 |
|
} |
| 230 |
|
} |
| 231 |
|
Tcl_SetResult(interp, topLevelPtr->pathName, TCL_STATIC); |
| 232 |
|
return TCL_OK; |
| 233 |
|
} |
| 234 |
|
} |
| 235 |
|
break; |
| 236 |
|
} |
| 237 |
|
default: { |
| 238 |
|
panic("bad const entries to focusOptions in focus command"); |
| 239 |
|
} |
| 240 |
|
} |
| 241 |
|
return TCL_OK; |
| 242 |
|
} |
| 243 |
|
|
| 244 |
|
/* |
| 245 |
|
*-------------------------------------------------------------- |
| 246 |
|
* |
| 247 |
|
* TkFocusFilterEvent -- |
| 248 |
|
* |
| 249 |
|
* This procedure is invoked by Tk_HandleEvent when it encounters |
| 250 |
|
* a FocusIn, FocusOut, Enter, or Leave event. |
| 251 |
|
* |
| 252 |
|
* Results: |
| 253 |
|
* A return value of 1 means that Tk_HandleEvent should process |
| 254 |
|
* the event normally (i.e. event handlers should be invoked). |
| 255 |
|
* A return value of 0 means that this event should be ignored. |
| 256 |
|
* |
| 257 |
|
* Side effects: |
| 258 |
|
* Additional events may be generated, and the focus may switch. |
| 259 |
|
* |
| 260 |
|
*-------------------------------------------------------------- |
| 261 |
|
*/ |
| 262 |
|
|
| 263 |
|
int |
| 264 |
|
TkFocusFilterEvent(winPtr, eventPtr) |
| 265 |
|
TkWindow *winPtr; /* Window that focus event is directed to. */ |
| 266 |
|
XEvent *eventPtr; /* FocusIn, FocusOut, Enter, or Leave |
| 267 |
|
* event. */ |
| 268 |
|
{ |
| 269 |
|
/* |
| 270 |
|
* Design notes: the window manager and X server work together to |
| 271 |
|
* transfer the focus among top-level windows. This procedure takes |
| 272 |
|
* care of transferring the focus from a top-level or wrapper window |
| 273 |
|
* to the actual window within that top-level that has the focus. |
| 274 |
|
* We do this by synthesizing X events to move the focus around. |
| 275 |
|
* None of the FocusIn and FocusOut events generated by X are ever |
| 276 |
|
* used outside of this procedure; only the synthesized events get |
| 277 |
|
* through to the rest of the application. At one point (e.g. |
| 278 |
|
* Tk4.0b1) Tk used to call X to move the focus from a top-level to |
| 279 |
|
* one of its descendants, then just pass through the events |
| 280 |
|
* generated by X. This approach didn't work very well, for a |
| 281 |
|
* variety of reasons. For example, if X generates the events they |
| 282 |
|
* go at the back of the event queue, which could cause problems if |
| 283 |
|
* other things have already happened, such as moving the focus to |
| 284 |
|
* yet another window. |
| 285 |
|
*/ |
| 286 |
|
|
| 287 |
|
ToplevelFocusInfo *tlFocusPtr; |
| 288 |
|
DisplayFocusInfo *displayFocusPtr; |
| 289 |
|
TkDisplay *dispPtr = winPtr->dispPtr; |
| 290 |
|
TkWindow *newFocusPtr; |
| 291 |
|
int retValue, delta; |
| 292 |
|
|
| 293 |
|
/* |
| 294 |
|
* If this was a generated event, just turn off the generated |
| 295 |
|
* flag and pass the event through to Tk bindings. |
| 296 |
|
*/ |
| 297 |
|
|
| 298 |
|
if (eventPtr->xfocus.send_event == GENERATED_EVENT_MAGIC) { |
| 299 |
|
eventPtr->xfocus.send_event = 0; |
| 300 |
|
return 1; |
| 301 |
|
} |
| 302 |
|
|
| 303 |
|
/* |
| 304 |
|
* Check for special events generated by embedded applications to |
| 305 |
|
* request the input focus. If this is one of those events, make |
| 306 |
|
* the change in focus and return without any additional processing |
| 307 |
|
* of the event (note: the "detail" field of the event indicates |
| 308 |
|
* whether to claim the focus even if we don't already have it). |
| 309 |
|
*/ |
| 310 |
|
|
| 311 |
|
if ((eventPtr->xfocus.mode == EMBEDDED_APP_WANTS_FOCUS) |
| 312 |
|
&& (eventPtr->type == FocusIn)) { |
| 313 |
|
TkSetFocusWin(winPtr, eventPtr->xfocus.detail); |
| 314 |
|
return 0; |
| 315 |
|
} |
| 316 |
|
|
| 317 |
|
/* |
| 318 |
|
* This was not a generated event. We'll return 1 (so that the |
| 319 |
|
* event will be processed) if it's an Enter or Leave event, and |
| 320 |
|
* 0 (so that the event won't be processed) if it's a FocusIn or |
| 321 |
|
* FocusOut event. |
| 322 |
|
*/ |
| 323 |
|
|
| 324 |
|
retValue = 0; |
| 325 |
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
| 326 |
|
if (eventPtr->type == FocusIn) { |
| 327 |
|
/* |
| 328 |
|
* Skip FocusIn events that cause confusion |
| 329 |
|
* NotifyVirtual and NotifyNonlinearVirtual - Virtual events occur |
| 330 |
|
* on windows in between the origin and destination of the |
| 331 |
|
* focus change. For FocusIn we may see this when focus |
| 332 |
|
* goes into an embedded child. We don't care about this, |
| 333 |
|
* although we may end up getting a NotifyPointer later. |
| 334 |
|
* NotifyInferior - focus is coming to us from an embedded child. |
| 335 |
|
* When focus is on an embeded focus, we still think we have |
| 336 |
|
* the focus, too, so this message doesn't change our state. |
| 337 |
|
* NotifyPointerRoot - should never happen because this is sent |
| 338 |
|
* to the root window. |
| 339 |
|
* |
| 340 |
|
* Interesting FocusIn events are |
| 341 |
|
* NotifyAncestor - focus is coming from our parent, probably the root. |
| 342 |
|
* NotifyNonlinear - focus is coming from a different branch, probably |
| 343 |
|
* another toplevel. |
| 344 |
|
* NotifyPointer - implicit focus because of the mouse position. |
| 345 |
|
* This is only interesting on toplevels, when it means that the |
| 346 |
|
* focus has been set to the root window but the mouse is over |
| 347 |
|
* this toplevel. We take the focus implicitly (probably no |
| 348 |
|
* window manager) |
| 349 |
|
*/ |
| 350 |
|
|
| 351 |
|
if ((eventPtr->xfocus.detail == NotifyVirtual) |
| 352 |
|
|| (eventPtr->xfocus.detail == NotifyNonlinearVirtual) |
| 353 |
|
|| (eventPtr->xfocus.detail == NotifyPointerRoot) |
| 354 |
|
|| (eventPtr->xfocus.detail == NotifyInferior)) { |
| 355 |
|
return retValue; |
| 356 |
|
} |
| 357 |
|
} else if (eventPtr->type == FocusOut) { |
| 358 |
|
/* |
| 359 |
|
* Skip FocusOut events that cause confusion. |
| 360 |
|
* NotifyPointer - the pointer is in us or a child, and we are losing |
| 361 |
|
* focus because of an XSetInputFocus. Other focus events |
| 362 |
|
* will set our state properly. |
| 363 |
|
* NotifyPointerRoot - should never happen because this is sent |
| 364 |
|
* to the root window. |
| 365 |
|
* NotifyInferior - focus leaving us for an embedded child. We |
| 366 |
|
* retain a notion of focus when an embedded child has focus. |
| 367 |
|
* |
| 368 |
|
* Interesting events are: |
| 369 |
|
* NotifyAncestor - focus is going to root. |
| 370 |
|
* NotifyNonlinear - focus is going to another branch, probably |
| 371 |
|
* another toplevel. |
| 372 |
|
* NotifyVirtual, NotifyNonlinearVirtual - focus is passing through, |
| 373 |
|
* and we need to make sure we track this. |
| 374 |
|
*/ |
| 375 |
|
|
| 376 |
|
if ((eventPtr->xfocus.detail == NotifyPointer) |
| 377 |
|
|| (eventPtr->xfocus.detail == NotifyPointerRoot) |
| 378 |
|
|| (eventPtr->xfocus.detail == NotifyInferior)) { |
| 379 |
|
return retValue; |
| 380 |
|
} |
| 381 |
|
} else { |
| 382 |
|
retValue = 1; |
| 383 |
|
if (eventPtr->xcrossing.detail == NotifyInferior) { |
| 384 |
|
return retValue; |
| 385 |
|
} |
| 386 |
|
} |
| 387 |
|
|
| 388 |
|
/* |
| 389 |
|
* If winPtr isn't a top-level window than just ignore the event. |
| 390 |
|
*/ |
| 391 |
|
|
| 392 |
|
winPtr = TkWmFocusToplevel(winPtr); |
| 393 |
|
if (winPtr == NULL) { |
| 394 |
|
return retValue; |
| 395 |
|
} |
| 396 |
|
|
| 397 |
|
/* |
| 398 |
|
* If there is a grab in effect and this window is outside the |
| 399 |
|
* grabbed tree, then ignore the event. |
| 400 |
|
*/ |
| 401 |
|
|
| 402 |
|
if (TkGrabState(winPtr) == TK_GRAB_EXCLUDED) { |
| 403 |
|
return retValue; |
| 404 |
|
} |
| 405 |
|
|
| 406 |
|
/* |
| 407 |
|
* It is possible that there were outstanding FocusIn and FocusOut |
| 408 |
|
* events on their way to us at the time the focus was changed |
| 409 |
|
* internally with the "focus" command. If so, these events could |
| 410 |
|
* potentially cause us to lose the focus (switch it to the window |
| 411 |
|
* of the last FocusIn event) even though the focus change occurred |
| 412 |
|
* after those events. The following code detects this and ignores |
| 413 |
|
* the stale events. |
| 414 |
|
* |
| 415 |
|
* Note: the focusSerial is only generated by TkpChangeFocus, |
| 416 |
|
* whereas in Tk 4.2 there was always a nop marker generated. |
| 417 |
|
*/ |
| 418 |
|
|
| 419 |
|
delta = eventPtr->xfocus.serial - displayFocusPtr->focusSerial; |
| 420 |
|
if (delta < 0) { |
| 421 |
|
return retValue; |
| 422 |
|
} |
| 423 |
|
|
| 424 |
|
/* |
| 425 |
|
* Find the ToplevelFocusInfo structure for the window, and make a new one |
| 426 |
|
* if there isn't one already. |
| 427 |
|
*/ |
| 428 |
|
|
| 429 |
|
for (tlFocusPtr = winPtr->mainPtr->tlFocusPtr; tlFocusPtr != NULL; |
| 430 |
|
tlFocusPtr = tlFocusPtr->nextPtr) { |
| 431 |
|
if (tlFocusPtr->topLevelPtr == winPtr) { |
| 432 |
|
break; |
| 433 |
|
} |
| 434 |
|
} |
| 435 |
|
if (tlFocusPtr == NULL) { |
| 436 |
|
tlFocusPtr = (ToplevelFocusInfo *) ckalloc(sizeof(ToplevelFocusInfo)); |
| 437 |
|
tlFocusPtr->topLevelPtr = tlFocusPtr->focusWinPtr = winPtr; |
| 438 |
|
tlFocusPtr->nextPtr = winPtr->mainPtr->tlFocusPtr; |
| 439 |
|
winPtr->mainPtr->tlFocusPtr = tlFocusPtr; |
| 440 |
|
} |
| 441 |
|
newFocusPtr = tlFocusPtr->focusWinPtr; |
| 442 |
|
|
| 443 |
|
if (eventPtr->type == FocusIn) { |
| 444 |
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, newFocusPtr); |
| 445 |
|
displayFocusPtr->focusWinPtr = newFocusPtr; |
| 446 |
|
dispPtr->focusPtr = newFocusPtr; |
| 447 |
|
|
| 448 |
|
/* |
| 449 |
|
* NotifyPointer gets set when the focus has been set to the root window |
| 450 |
|
* but we have the pointer. We'll treat this like an implicit |
| 451 |
|
* focus in event so that upon Leave events we release focus. |
| 452 |
|
*/ |
| 453 |
|
|
| 454 |
|
if (!(winPtr->flags & TK_EMBEDDED)) { |
| 455 |
|
if (eventPtr->xfocus.detail == NotifyPointer) { |
| 456 |
|
dispPtr->implicitWinPtr = winPtr; |
| 457 |
|
} else { |
| 458 |
|
dispPtr->implicitWinPtr = NULL; |
| 459 |
|
} |
| 460 |
|
} |
| 461 |
|
} else if (eventPtr->type == FocusOut) { |
| 462 |
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, (TkWindow *) NULL); |
| 463 |
|
|
| 464 |
|
/* |
| 465 |
|
* Reset dispPtr->focusPtr, but only if it currently is the same |
| 466 |
|
* as this application's focusWinPtr: this check is needed to |
| 467 |
|
* handle embedded applications in the same process. |
| 468 |
|
*/ |
| 469 |
|
|
| 470 |
|
if (dispPtr->focusPtr == displayFocusPtr->focusWinPtr) { |
| 471 |
|
dispPtr->focusPtr = NULL; |
| 472 |
|
} |
| 473 |
|
displayFocusPtr->focusWinPtr = NULL; |
| 474 |
|
} else if (eventPtr->type == EnterNotify) { |
| 475 |
|
/* |
| 476 |
|
* If there is no window manager, or if the window manager isn't |
| 477 |
|
* moving the focus around (e.g. the disgusting "NoTitleFocus" |
| 478 |
|
* option has been selected in twm), then we won't get FocusIn |
| 479 |
|
* or FocusOut events. Instead, the "focus" field will be set |
| 480 |
|
* in an Enter event to indicate that we've already got the focus |
| 481 |
|
* when the mouse enters the window (even though we didn't get |
| 482 |
|
* a FocusIn event). Watch for this and grab the focus when it |
| 483 |
|
* happens. Note: if this is an embedded application then don't |
| 484 |
|
* accept the focus implicitly like this; the container |
| 485 |
|
* application will give us the focus explicitly if it wants us |
| 486 |
|
* to have it. |
| 487 |
|
*/ |
| 488 |
|
|
| 489 |
|
if (eventPtr->xcrossing.focus && |
| 490 |
|
(displayFocusPtr->focusWinPtr == NULL) |
| 491 |
|
&& !(winPtr->flags & TK_EMBEDDED)) { |
| 492 |
|
if (dispPtr->focusDebug) { |
| 493 |
|
printf("Focussed implicitly on %s\n", |
| 494 |
|
newFocusPtr->pathName); |
| 495 |
|
} |
| 496 |
|
|
| 497 |
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, newFocusPtr); |
| 498 |
|
displayFocusPtr->focusWinPtr = newFocusPtr; |
| 499 |
|
dispPtr->implicitWinPtr = winPtr; |
| 500 |
|
dispPtr->focusPtr = newFocusPtr; |
| 501 |
|
} |
| 502 |
|
} else if (eventPtr->type == LeaveNotify) { |
| 503 |
|
/* |
| 504 |
|
* If the pointer just left a window for which we automatically |
| 505 |
|
* claimed the focus on enter, move the focus back to the root |
| 506 |
|
* window, where it was before we claimed it above. Note: |
| 507 |
|
* dispPtr->implicitWinPtr may not be the same as |
| 508 |
|
* displayFocusPtr->focusWinPtr (e.g. because the "focus" |
| 509 |
|
* command was used to redirect the focus after it arrived at |
| 510 |
|
* dispPtr->implicitWinPtr)!! In addition, we generate events |
| 511 |
|
* because the window manager won't give us a FocusOut event when |
| 512 |
|
* we focus on the root. |
| 513 |
|
*/ |
| 514 |
|
|
| 515 |
|
if ((dispPtr->implicitWinPtr != NULL) |
| 516 |
|
&& !(winPtr->flags & TK_EMBEDDED)) { |
| 517 |
|
if (dispPtr->focusDebug) { |
| 518 |
|
printf("Defocussed implicit Async\n"); |
| 519 |
|
} |
| 520 |
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, |
| 521 |
|
(TkWindow *) NULL); |
| 522 |
|
XSetInputFocus(dispPtr->display, PointerRoot, RevertToPointerRoot, |
| 523 |
|
CurrentTime); |
| 524 |
|
displayFocusPtr->focusWinPtr = NULL; |
| 525 |
|
dispPtr->implicitWinPtr = NULL; |
| 526 |
|
} |
| 527 |
|
} |
| 528 |
|
return retValue; |
| 529 |
|
} |
| 530 |
|
|
| 531 |
|
/* |
| 532 |
|
*---------------------------------------------------------------------- |
| 533 |
|
* |
| 534 |
|
* TkSetFocusWin -- |
| 535 |
|
* |
| 536 |
|
* This procedure is invoked to change the focus window for a |
| 537 |
|
* given display in a given application. |
| 538 |
|
* |
| 539 |
|
* Results: |
| 540 |
|
* None. |
| 541 |
|
* |
| 542 |
|
* Side effects: |
| 543 |
|
* Event handlers may be invoked to process the change of |
| 544 |
|
* focus. |
| 545 |
|
* |
| 546 |
|
*---------------------------------------------------------------------- |
| 547 |
|
*/ |
| 548 |
|
|
| 549 |
|
void |
| 550 |
|
TkSetFocusWin(winPtr, force) |
| 551 |
|
TkWindow *winPtr; /* Window that is to be the new focus for |
| 552 |
|
* its display and application. */ |
| 553 |
|
int force; /* If non-zero, set the X focus to this |
| 554 |
|
* window even if the application doesn't |
| 555 |
|
* currently have the X focus. */ |
| 556 |
|
{ |
| 557 |
|
ToplevelFocusInfo *tlFocusPtr; |
| 558 |
|
DisplayFocusInfo *displayFocusPtr; |
| 559 |
|
TkWindow *topLevelPtr; |
| 560 |
|
int allMapped, serial; |
| 561 |
|
|
| 562 |
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
| 563 |
|
|
| 564 |
|
/* |
| 565 |
|
* If force is set, we should make sure we grab the focus regardless |
| 566 |
|
* of the current focus window since under Windows, we may need to |
| 567 |
|
* take control away from another application. |
| 568 |
|
*/ |
| 569 |
|
|
| 570 |
|
if (winPtr == displayFocusPtr->focusWinPtr && !force) { |
| 571 |
|
return; |
| 572 |
|
} |
| 573 |
|
|
| 574 |
|
/* |
| 575 |
|
* Find the top-level window for winPtr, then find (or create) |
| 576 |
|
* a record for the top-level. Also see whether winPtr and all its |
| 577 |
|
* ancestors are mapped. |
| 578 |
|
*/ |
| 579 |
|
|
| 580 |
|
allMapped = 1; |
| 581 |
|
for (topLevelPtr = winPtr; ; topLevelPtr = topLevelPtr->parentPtr) { |
| 582 |
|
if (topLevelPtr == NULL) { |
| 583 |
|
/* |
| 584 |
|
* The window is being deleted. No point in worrying about |
| 585 |
|
* giving it the focus. |
| 586 |
|
*/ |
| 587 |
|
return; |
| 588 |
|
} |
| 589 |
|
if (!(topLevelPtr->flags & TK_MAPPED)) { |
| 590 |
|
allMapped = 0; |
| 591 |
|
} |
| 592 |
|
if (topLevelPtr->flags & TK_TOP_LEVEL) { |
| 593 |
|
break; |
| 594 |
|
} |
| 595 |
|
} |
| 596 |
|
|
| 597 |
|
/* |
| 598 |
|
* If the new focus window isn't mapped, then we can't focus on it |
| 599 |
|
* (X will generate an error, for example). Instead, create an |
| 600 |
|
* event handler that will set the focus to this window once it gets |
| 601 |
|
* mapped. At the same time, delete any old handler that might be |
| 602 |
|
* around; it's no longer relevant. |
| 603 |
|
*/ |
| 604 |
|
|
| 605 |
|
if (displayFocusPtr->focusOnMapPtr != NULL) { |
| 606 |
|
Tk_DeleteEventHandler( |
| 607 |
|
(Tk_Window) displayFocusPtr->focusOnMapPtr, |
| 608 |
|
StructureNotifyMask, FocusMapProc, |
| 609 |
|
(ClientData) displayFocusPtr->focusOnMapPtr); |
| 610 |
|
displayFocusPtr->focusOnMapPtr = NULL; |
| 611 |
|
} |
| 612 |
|
if (!allMapped) { |
| 613 |
|
Tk_CreateEventHandler((Tk_Window) winPtr, |
| 614 |
|
VisibilityChangeMask, FocusMapProc, |
| 615 |
|
(ClientData) winPtr); |
| 616 |
|
displayFocusPtr->focusOnMapPtr = winPtr; |
| 617 |
|
displayFocusPtr->forceFocus = force; |
| 618 |
|
return; |
| 619 |
|
} |
| 620 |
|
|
| 621 |
|
for (tlFocusPtr = winPtr->mainPtr->tlFocusPtr; tlFocusPtr != NULL; |
| 622 |
|
tlFocusPtr = tlFocusPtr->nextPtr) { |
| 623 |
|
if (tlFocusPtr->topLevelPtr == topLevelPtr) { |
| 624 |
|
break; |
| 625 |
|
} |
| 626 |
|
} |
| 627 |
|
if (tlFocusPtr == NULL) { |
| 628 |
|
tlFocusPtr = (ToplevelFocusInfo *) ckalloc(sizeof(ToplevelFocusInfo)); |
| 629 |
|
tlFocusPtr->topLevelPtr = topLevelPtr; |
| 630 |
|
tlFocusPtr->nextPtr = winPtr->mainPtr->tlFocusPtr; |
| 631 |
|
winPtr->mainPtr->tlFocusPtr = tlFocusPtr; |
| 632 |
|
} |
| 633 |
|
tlFocusPtr->focusWinPtr = winPtr; |
| 634 |
|
|
| 635 |
|
/* |
| 636 |
|
* Reset the window system's focus window and generate focus events, |
| 637 |
|
* with two special cases: |
| 638 |
|
* |
| 639 |
|
* 1. If the application is embedded and doesn't currently have the |
| 640 |
|
* focus, don't set the focus directly. Instead, see if the |
| 641 |
|
* embedding code can claim the focus from the enclosing |
| 642 |
|
* container. |
| 643 |
|
* 2. Otherwise, if the application doesn't currently have the |
| 644 |
|
* focus, don't change the window system's focus unless it was |
| 645 |
|
* already in this application or "force" was specified. |
| 646 |
|
*/ |
| 647 |
|
|
| 648 |
|
if ((topLevelPtr->flags & TK_EMBEDDED) |
| 649 |
|
&& (displayFocusPtr->focusWinPtr == NULL)) { |
| 650 |
|
TkpClaimFocus(topLevelPtr, force); |
| 651 |
|
} else if ((displayFocusPtr->focusWinPtr != NULL) || force) { |
| 652 |
|
/* |
| 653 |
|
* Generate events to shift focus between Tk windows. |
| 654 |
|
* We do this regardless of what TkpChangeFocus does with |
| 655 |
|
* the real X focus so that Tk widgets track focus commands |
| 656 |
|
* when there is no window manager. GenerateFocusEvents will |
| 657 |
|
* set up a serial number marker so we discard focus events |
| 658 |
|
* that are triggered by the ChangeFocus. |
| 659 |
|
*/ |
| 660 |
|
|
| 661 |
|
serial = TkpChangeFocus(TkpGetWrapperWindow(topLevelPtr), force); |
| 662 |
|
if (serial != 0) { |
| 663 |
|
displayFocusPtr->focusSerial = serial; |
| 664 |
|
} |
| 665 |
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, winPtr); |
| 666 |
|
displayFocusPtr->focusWinPtr = winPtr; |
| 667 |
|
winPtr->dispPtr->focusPtr = winPtr; |
| 668 |
|
} |
| 669 |
|
} |
| 670 |
|
|
| 671 |
|
/* |
| 672 |
|
*---------------------------------------------------------------------- |
| 673 |
|
* |
| 674 |
|
* TkGetFocusWin -- |
| 675 |
|
* |
| 676 |
|
* Given a window, this procedure returns the current focus |
| 677 |
|
* window for its application and display. |
| 678 |
|
* |
| 679 |
|
* Results: |
| 680 |
|
* The return value is a pointer to the window that currently |
| 681 |
|
* has the input focus for the specified application and |
| 682 |
|
* display, or NULL if none. |
| 683 |
|
* |
| 684 |
|
* Side effects: |
| 685 |
|
* None. |
| 686 |
|
* |
| 687 |
|
*---------------------------------------------------------------------- |
| 688 |
|
*/ |
| 689 |
|
|
| 690 |
|
TkWindow * |
| 691 |
|
TkGetFocusWin(winPtr) |
| 692 |
|
TkWindow *winPtr; /* Window that selects an application |
| 693 |
|
* and a display. */ |
| 694 |
|
{ |
| 695 |
|
DisplayFocusInfo *displayFocusPtr; |
| 696 |
|
|
| 697 |
|
if (winPtr == NULL) { |
| 698 |
|
return (TkWindow *) NULL; |
| 699 |
|
} |
| 700 |
|
|
| 701 |
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
| 702 |
|
return displayFocusPtr->focusWinPtr; |
| 703 |
|
} |
| 704 |
|
|
| 705 |
|
/* |
| 706 |
|
*---------------------------------------------------------------------- |
| 707 |
|
* |
| 708 |
|
* TkFocusKeyEvent -- |
| 709 |
|
* |
| 710 |
|
* Given a window and a key press or release event that arrived for |
| 711 |
|
* the window, use information about the keyboard focus to compute |
| 712 |
|
* which window should really get the event. In addition, update |
| 713 |
|
* the event to refer to its new window. |
| 714 |
|
* |
| 715 |
|
* Results: |
| 716 |
|
* The return value is a pointer to the window that has the input |
| 717 |
|
* focus in winPtr's application, or NULL if winPtr's application |
| 718 |
|
* doesn't have the input focus. If a non-NULL value is returned, |
| 719 |
|
* eventPtr will be updated to refer properly to the focus window. |
| 720 |
|
* |
| 721 |
|
* Side effects: |
| 722 |
|
* None. |
| 723 |
|
* |
| 724 |
|
*---------------------------------------------------------------------- |
| 725 |
|
*/ |
| 726 |
|
|
| 727 |
|
TkWindow * |
| 728 |
|
TkFocusKeyEvent(winPtr, eventPtr) |
| 729 |
|
TkWindow *winPtr; /* Window that selects an application |
| 730 |
|
* and a display. */ |
| 731 |
|
XEvent *eventPtr; /* X event to redirect (should be KeyPress |
| 732 |
|
* or KeyRelease). */ |
| 733 |
|
{ |
| 734 |
|
DisplayFocusInfo *displayFocusPtr; |
| 735 |
|
TkWindow *focusWinPtr; |
| 736 |
|
int focusX, focusY, vRootX, vRootY, vRootWidth, vRootHeight; |
| 737 |
|
|
| 738 |
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
| 739 |
|
focusWinPtr = displayFocusPtr->focusWinPtr; |
| 740 |
|
|
| 741 |
|
/* |
| 742 |
|
* The code below is a debugging aid to make sure that dispPtr->focusPtr |
| 743 |
|
* is kept properly in sync with the "truth", which is the value in |
| 744 |
|
* displayFocusPtr->focusWinPtr. |
| 745 |
|
*/ |
| 746 |
|
|
| 747 |
|
#ifdef TCL_MEM_DEBUG |
| 748 |
|
if (focusWinPtr != winPtr->dispPtr->focusPtr) { |
| 749 |
|
printf("TkFocusKeyEvent found dispPtr->focusPtr out of sync:\n"); |
| 750 |
|
printf("expected %s, got %s\n", |
| 751 |
|
(focusWinPtr != NULL) ? focusWinPtr->pathName : "??", |
| 752 |
|
(winPtr->dispPtr->focusPtr != NULL) ? |
| 753 |
|
winPtr->dispPtr->focusPtr->pathName : "??"); |
| 754 |
|
} |
| 755 |
|
#endif |
| 756 |
|
|
| 757 |
|
if ((focusWinPtr != NULL) && (focusWinPtr->mainPtr == winPtr->mainPtr)) { |
| 758 |
|
/* |
| 759 |
|
* Map the x and y coordinates to make sense in the context of |
| 760 |
|
* the focus window, if possible (make both -1 if the map-from |
| 761 |
|
* and map-to windows don't share the same screen). |
| 762 |
|
*/ |
| 763 |
|
|
| 764 |
|
if ((focusWinPtr->display != winPtr->display) |
| 765 |
|
|| (focusWinPtr->screenNum != winPtr->screenNum)) { |
| 766 |
|
eventPtr->xkey.x = -1; |
| 767 |
|
eventPtr->xkey.y = -1; |
| 768 |
|
} else { |
| 769 |
|
Tk_GetVRootGeometry((Tk_Window) focusWinPtr, &vRootX, &vRootY, |
| 770 |
|
&vRootWidth, &vRootHeight); |
| 771 |
|
Tk_GetRootCoords((Tk_Window) focusWinPtr, &focusX, &focusY); |
| 772 |
|
eventPtr->xkey.x = eventPtr->xkey.x_root - vRootX - focusX; |
| 773 |
|
eventPtr->xkey.y = eventPtr->xkey.y_root - vRootY - focusY; |
| 774 |
|
} |
| 775 |
|
eventPtr->xkey.window = focusWinPtr->window; |
| 776 |
|
return focusWinPtr; |
| 777 |
|
} |
| 778 |
|
|
| 779 |
|
/* |
| 780 |
|
* The event doesn't belong to us. Perhaps, due to embedding, it |
| 781 |
|
* really belongs to someone else. Give the embedding code a chance |
| 782 |
|
* to redirect the event. |
| 783 |
|
*/ |
| 784 |
|
|
| 785 |
|
TkpRedirectKeyEvent(winPtr, eventPtr); |
| 786 |
|
return (TkWindow *) NULL; |
| 787 |
|
} |
| 788 |
|
|
| 789 |
|
/* |
| 790 |
|
*---------------------------------------------------------------------- |
| 791 |
|
* |
| 792 |
|
* TkFocusDeadWindow -- |
| 793 |
|
* |
| 794 |
|
* This procedure is invoked when it is determined that |
| 795 |
|
* a window is dead. It cleans up focus-related information |
| 796 |
|
* about the window. |
| 797 |
|
* |
| 798 |
|
* Results: |
| 799 |
|
* None. |
| 800 |
|
* |
| 801 |
|
* Side effects: |
| 802 |
|
* Various things get cleaned up and recycled. |
| 803 |
|
* |
| 804 |
|
*---------------------------------------------------------------------- |
| 805 |
|
*/ |
| 806 |
|
|
| 807 |
|
void |
| 808 |
|
TkFocusDeadWindow(winPtr) |
| 809 |
|
register TkWindow *winPtr; /* Information about the window |
| 810 |
|
* that is being deleted. */ |
| 811 |
|
{ |
| 812 |
|
ToplevelFocusInfo *tlFocusPtr, *prevPtr; |
| 813 |
|
DisplayFocusInfo *displayFocusPtr; |
| 814 |
|
TkDisplay *dispPtr = winPtr->dispPtr; |
| 815 |
|
|
| 816 |
|
/* |
| 817 |
|
* Search for focus records that refer to this window either as |
| 818 |
|
* the top-level window or the current focus window. |
| 819 |
|
*/ |
| 820 |
|
|
| 821 |
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, winPtr->dispPtr); |
| 822 |
|
for (prevPtr = NULL, tlFocusPtr = winPtr->mainPtr->tlFocusPtr; |
| 823 |
|
tlFocusPtr != NULL; |
| 824 |
|
prevPtr = tlFocusPtr, tlFocusPtr = tlFocusPtr->nextPtr) { |
| 825 |
|
if (winPtr == tlFocusPtr->topLevelPtr) { |
| 826 |
|
/* |
| 827 |
|
* The top-level window is the one being deleted: free |
| 828 |
|
* the focus record and release the focus back to PointerRoot |
| 829 |
|
* if we acquired it implicitly. |
| 830 |
|
*/ |
| 831 |
|
|
| 832 |
|
if (dispPtr->implicitWinPtr == winPtr) { |
| 833 |
|
if (dispPtr->focusDebug) { |
| 834 |
|
printf("releasing focus to root after %s died\n", |
| 835 |
|
tlFocusPtr->topLevelPtr->pathName); |
| 836 |
|
} |
| 837 |
|
dispPtr->implicitWinPtr = NULL; |
| 838 |
|
displayFocusPtr->focusWinPtr = NULL; |
| 839 |
|
dispPtr->focusPtr = NULL; |
| 840 |
|
} |
| 841 |
|
if (displayFocusPtr->focusWinPtr == tlFocusPtr->focusWinPtr) { |
| 842 |
|
displayFocusPtr->focusWinPtr = NULL; |
| 843 |
|
dispPtr->focusPtr = NULL; |
| 844 |
|
} |
| 845 |
|
if (prevPtr == NULL) { |
| 846 |
|
winPtr->mainPtr->tlFocusPtr = tlFocusPtr->nextPtr; |
| 847 |
|
} else { |
| 848 |
|
prevPtr->nextPtr = tlFocusPtr->nextPtr; |
| 849 |
|
} |
| 850 |
|
ckfree((char *) tlFocusPtr); |
| 851 |
|
break; |
| 852 |
|
} else if (winPtr == tlFocusPtr->focusWinPtr) { |
| 853 |
|
/* |
| 854 |
|
* The deleted window had the focus for its top-level: |
| 855 |
|
* move the focus to the top-level itself. |
| 856 |
|
*/ |
| 857 |
|
|
| 858 |
|
tlFocusPtr->focusWinPtr = tlFocusPtr->topLevelPtr; |
| 859 |
|
if ((displayFocusPtr->focusWinPtr == winPtr) |
| 860 |
|
&& !(tlFocusPtr->topLevelPtr->flags & TK_ALREADY_DEAD)) { |
| 861 |
|
if (dispPtr->focusDebug) { |
| 862 |
|
printf("forwarding focus to %s after %s died\n", |
| 863 |
|
tlFocusPtr->topLevelPtr->pathName, |
| 864 |
|
winPtr->pathName); |
| 865 |
|
} |
| 866 |
|
GenerateFocusEvents(displayFocusPtr->focusWinPtr, |
| 867 |
|
tlFocusPtr->topLevelPtr); |
| 868 |
|
displayFocusPtr->focusWinPtr = tlFocusPtr->topLevelPtr; |
| 869 |
|
dispPtr->focusPtr = tlFocusPtr->topLevelPtr; |
| 870 |
|
} |
| 871 |
|
break; |
| 872 |
|
} |
| 873 |
|
} |
| 874 |
|
|
| 875 |
|
if (displayFocusPtr->focusOnMapPtr == winPtr) { |
| 876 |
|
displayFocusPtr->focusOnMapPtr = NULL; |
| 877 |
|
} |
| 878 |
|
} |
| 879 |
|
|
| 880 |
|
/* |
| 881 |
|
*---------------------------------------------------------------------- |
| 882 |
|
* |
| 883 |
|
* GenerateFocusEvents -- |
| 884 |
|
* |
| 885 |
|
* This procedure is called to create FocusIn and FocusOut events to |
| 886 |
|
* move the input focus from one window to another. |
| 887 |
|
* |
| 888 |
|
* Results: |
| 889 |
|
* None. |
| 890 |
|
* |
| 891 |
|
* Side effects: |
| 892 |
|
* FocusIn and FocusOut events are generated. |
| 893 |
|
* |
| 894 |
|
*---------------------------------------------------------------------- |
| 895 |
|
*/ |
| 896 |
|
|
| 897 |
|
static void |
| 898 |
|
GenerateFocusEvents(sourcePtr, destPtr) |
| 899 |
|
TkWindow *sourcePtr; /* Window that used to have the focus (may |
| 900 |
|
* be NULL). */ |
| 901 |
|
TkWindow *destPtr; /* New window to have the focus (may be |
| 902 |
|
* NULL). */ |
| 903 |
|
|
| 904 |
|
{ |
| 905 |
|
XEvent event; |
| 906 |
|
TkWindow *winPtr; |
| 907 |
|
|
| 908 |
|
winPtr = sourcePtr; |
| 909 |
|
if (winPtr == NULL) { |
| 910 |
|
winPtr = destPtr; |
| 911 |
|
if (winPtr == NULL) { |
| 912 |
|
return; |
| 913 |
|
} |
| 914 |
|
} |
| 915 |
|
|
| 916 |
|
event.xfocus.serial = LastKnownRequestProcessed(winPtr->display); |
| 917 |
|
event.xfocus.send_event = GENERATED_EVENT_MAGIC; |
| 918 |
|
event.xfocus.display = winPtr->display; |
| 919 |
|
event.xfocus.mode = NotifyNormal; |
| 920 |
|
TkInOutEvents(&event, sourcePtr, destPtr, FocusOut, FocusIn, |
| 921 |
|
TCL_QUEUE_MARK); |
| 922 |
|
} |
| 923 |
|
|
| 924 |
|
/* |
| 925 |
|
*---------------------------------------------------------------------- |
| 926 |
|
* |
| 927 |
|
* FocusMapProc -- |
| 928 |
|
* |
| 929 |
|
* This procedure is called as an event handler for VisibilityNotify |
| 930 |
|
* events, if a window receives the focus at a time when its |
| 931 |
|
* toplevel isn't mapped. The procedure is needed because X |
| 932 |
|
* won't allow the focus to be set to an unmapped window; we |
| 933 |
|
* detect when the toplevel is mapped and set the focus to it then. |
| 934 |
|
* |
| 935 |
|
* Results: |
| 936 |
|
* None. |
| 937 |
|
* |
| 938 |
|
* Side effects: |
| 939 |
|
* If this is a map event, the focus gets set to the toplevel |
| 940 |
|
* given by clientData. |
| 941 |
|
* |
| 942 |
|
*---------------------------------------------------------------------- |
| 943 |
|
*/ |
| 944 |
|
|
| 945 |
|
static void |
| 946 |
|
FocusMapProc(clientData, eventPtr) |
| 947 |
|
ClientData clientData; /* Toplevel window. */ |
| 948 |
|
XEvent *eventPtr; /* Information about event. */ |
| 949 |
|
{ |
| 950 |
|
TkWindow *winPtr = (TkWindow *) clientData; |
| 951 |
|
DisplayFocusInfo *displayFocusPtr; |
| 952 |
|
|
| 953 |
|
if (eventPtr->type == VisibilityNotify) { |
| 954 |
|
displayFocusPtr = FindDisplayFocusInfo(winPtr->mainPtr, |
| 955 |
|
winPtr->dispPtr); |
| 956 |
|
if (winPtr->dispPtr->focusDebug) { |
| 957 |
|
printf("auto-focussing on %s, force %d\n", winPtr->pathName, |
| 958 |
|
displayFocusPtr->forceFocus); |
| 959 |
|
} |
| 960 |
|
Tk_DeleteEventHandler((Tk_Window) winPtr, VisibilityChangeMask, |
| 961 |
|
FocusMapProc, clientData); |
| 962 |
|
displayFocusPtr->focusOnMapPtr = NULL; |
| 963 |
|
TkSetFocusWin(winPtr, displayFocusPtr->forceFocus); |
| 964 |
|
} |
| 965 |
|
} |
| 966 |
|
|
| 967 |
|
/* |
| 968 |
|
*---------------------------------------------------------------------- |
| 969 |
|
* |
| 970 |
|
* FindDisplayFocusInfo -- |
| 971 |
|
* |
| 972 |
|
* Given an application and a display, this procedure locate the |
| 973 |
|
* focus record for that combination. If no such record exists, |
| 974 |
|
* it creates a new record and initializes it. |
| 975 |
|
* |
| 976 |
|
* Results: |
| 977 |
|
* The return value is a pointer to the record. |
| 978 |
|
* |
| 979 |
|
* Side effects: |
| 980 |
|
* A new record will be allocated if there wasn't one already. |
| 981 |
|
* |
| 982 |
|
*---------------------------------------------------------------------- |
| 983 |
|
*/ |
| 984 |
|
|
| 985 |
|
static DisplayFocusInfo * |
| 986 |
|
FindDisplayFocusInfo(mainPtr, dispPtr) |
| 987 |
|
TkMainInfo *mainPtr; /* Record that identifies a particular |
| 988 |
|
* application. */ |
| 989 |
|
TkDisplay *dispPtr; /* Display whose focus information is |
| 990 |
|
* needed. */ |
| 991 |
|
{ |
| 992 |
|
DisplayFocusInfo *displayFocusPtr; |
| 993 |
|
|
| 994 |
|
for (displayFocusPtr = mainPtr->displayFocusPtr; |
| 995 |
|
displayFocusPtr != NULL; |
| 996 |
|
displayFocusPtr = displayFocusPtr->nextPtr) { |
| 997 |
|
if (displayFocusPtr->dispPtr == dispPtr) { |
| 998 |
|
return displayFocusPtr; |
| 999 |
|
} |
| 1000 |
|
} |
| 1001 |
|
|
| 1002 |
|
/* |
| 1003 |
|
* The record doesn't exist yet. Make a new one. |
| 1004 |
|
*/ |
| 1005 |
|
|
| 1006 |
|
displayFocusPtr = (DisplayFocusInfo *) ckalloc(sizeof(DisplayFocusInfo)); |
| 1007 |
|
displayFocusPtr->dispPtr = dispPtr; |
| 1008 |
|
displayFocusPtr->focusWinPtr = NULL; |
| 1009 |
|
displayFocusPtr->focusOnMapPtr = NULL; |
| 1010 |
|
displayFocusPtr->forceFocus = 0; |
| 1011 |
|
displayFocusPtr->focusSerial = 0; |
| 1012 |
|
displayFocusPtr->nextPtr = mainPtr->displayFocusPtr; |
| 1013 |
|
mainPtr->displayFocusPtr = displayFocusPtr; |
| 1014 |
|
return displayFocusPtr; |
| 1015 |
|
} |
| 1016 |
|
|
| 1017 |
|
/* End of tkfocus.c */ |
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