wmlib/event.c

   1 /* event.c - WindowMaker event handler
   2  *
   3  * WMlib - WindowMaker application programming interface
   4  *
   5  * Copyright (C) 1997 Alfredo K. Kojima
   6  *
   7  *  This library is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU Library General Public
   9  *  License as published by the Free Software Foundation; either
  10  *  version 2 of the License, or (at your option) any later version.
  11  *
  12  *  This library is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  Library General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Library General Public
  18  *  License along with this library; if not, write to the Free
  19  *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <X11/Xlib.h>
  25 #include <X11/Xutil.h>
  26
  27 #include "WMaker.h"
  28 #include "app.h"
  29 #include "menu.h"
  30
  31
  32 static Atom _XA_WINDOWMAKER_MENU=0;
  33
  34 enum {
  35     wmSelectItem = 1
  36 };
  37
  38
  39 static wmMenuEntry*
  40 findEntry(WMMenu *menu, int tag)
  41 {
  42     wmMenuEntry *entry=menu->first;
  43
  44     while (entry) {
  45         if (entry->tag == tag) {
  46             return entry;
  47         }
  48         if (entry->cascade) {
  49             wmMenuEntry *tmp;
  50             tmp = findEntry(entry->cascade, tag);
  51             if (tmp)
  52               return tmp;
  53         }
  54         entry = entry->next;
  55     }
  56     return NULL;
  57 }
  58
  59
  60 static void
  61 wmHandleMenuEvents(WMAppContext *app, XEvent *event)
  62 {
  63     wmMenuEntry *entry;
  64
  65     switch (event->xclient.data.l[1]) {
  66      case wmSelectItem:
  67         entry = findEntry(app->main_menu, event->xclient.data.l[2]);
  68         if (entry && entry->callback) {
  69             (*entry->callback)(entry->clientData, event->xclient.data.l[2],
  70                                event->xclient.data.l[0]);
  71         }
  72         break;
  73     }
  74 }
  75
  76
  77 int
  78 WMProcessEvent(WMAppContext *app, XEvent *event)
  79 {
  80     int proc=False;
  81     if (!_XA_WINDOWMAKER_MENU) {
  82         _XA_WINDOWMAKER_MENU = XInternAtom(app->dpy, "_WINDOWMAKER_MENU",
  83                                            False);
  84     }
  85     switch (event->type) {
  86      case ClientMessage:
  87         if (event->xclient.format == 32
  88             && event->xclient.message_type == _XA_WINDOWMAKER_MENU
  89             && event->xclient.window == app->main_window) {
  90             wmHandleMenuEvents(app, event);
  91             proc = True;
  92         }
  93     }
  94     return proc;
  95 }