135 lines
4.1 KiB
C
135 lines
4.1 KiB
C
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/*
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* tkMacWinMenu.c --
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*
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* This module implements the common elements of the Mac and Windows
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* specific features of menus. This file is not used for UNIX.
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*
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* Copyright (c) 1996-1997 by Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* SCCS: @(#) tkMacWinMenu.c 1.39 97/04/09 14:56:59
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*/
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#include "tkMenu.h"
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static int postCommandGeneration;
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static int PreprocessMenu _ANSI_ARGS_((TkMenu *menuPtr));
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/*
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*----------------------------------------------------------------------
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*
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* PreprocessMenu --
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*
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* The guts of the preprocessing. Recursive.
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*
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* Results:
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* The return value is a standard Tcl result (errors can occur
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* while the postcommands are being processed).
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*
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* Side effects:
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* Since commands can get executed while this routine is being executed,
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* the entire world can change.
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*
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*----------------------------------------------------------------------
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*/
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static int
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PreprocessMenu(menuPtr)
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TkMenu *menuPtr;
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{
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int index, result, finished;
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TkMenu *cascadeMenuPtr;
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Tcl_Preserve((ClientData) menuPtr);
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/*
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* First, let's process the post command on ourselves. If this command
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* destroys this menu, or if there was an error, we are done.
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*/
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result = TkPostCommand(menuPtr);
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if ((result != TCL_OK) || (menuPtr->tkwin == NULL)) {
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goto done;
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}
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/*
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* Now, we go through structure and process all of the commands.
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* Since the structure is changing, we stop after we do one command,
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* and start over. When we get through without doing any, we are done.
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*/
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do {
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finished = 1;
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for (index = 0; index < menuPtr->numEntries; index++) {
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if ((menuPtr->entries[index]->type == CASCADE_ENTRY)
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&& (menuPtr->entries[index]->name != NULL)) {
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if ((menuPtr->entries[index]->childMenuRefPtr != NULL)
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&& (menuPtr->entries[index]->childMenuRefPtr->menuPtr
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!= NULL)) {
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cascadeMenuPtr =
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menuPtr->entries[index]->childMenuRefPtr->menuPtr;
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if (cascadeMenuPtr->postCommandGeneration !=
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postCommandGeneration) {
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cascadeMenuPtr->postCommandGeneration =
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postCommandGeneration;
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result = PreprocessMenu(cascadeMenuPtr);
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if (result != TCL_OK) {
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goto done;
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}
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finished = 0;
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break;
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}
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}
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}
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}
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} while (!finished);
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done:
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Tcl_Release((ClientData)menuPtr);
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return result;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkPreprocessMenu --
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*
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* On the Mac and on Windows, all of the postcommand processing has
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* to be done on the entire tree underneath the main window to be
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* posted. This means that we have to traverse the menu tree and
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* issue the postcommands for all of the menus that have cascades
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* attached. Since the postcommands can change the menu structure while
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* we are traversing, we have to be extremely careful. Basically, the
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* idea is to traverse the structure until we succesfully process
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* one postcommand. Then we start over, and do it again until
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* we traverse the whole structure without processing any postcommands.
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*
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* We are also going to set up the cascade back pointers in here
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* since we have to traverse the entire structure underneath the menu
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* anyway, We can clear the postcommand marks while we do that.
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*
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* Results:
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* The return value is a standard Tcl result (errors can occur
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* while the postcommands are being processed).
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*
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* Side effects:
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* Since commands can get executed while this routine is being executed,
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* the entire world can change.
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*
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*----------------------------------------------------------------------
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*/
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int
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TkPreprocessMenu(menuPtr)
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TkMenu *menuPtr;
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{
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postCommandGeneration++;
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menuPtr->postCommandGeneration = postCommandGeneration;
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return PreprocessMenu(menuPtr);
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}
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