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kipc.cpp
1 /* This file is part of the KDE libraries
2 
3  Copyright (C) 1999 Mattias Ettrich (ettrich@kde.org)
4  Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
5 
6  This library is free software; you can redistribute it and/or
7  modify it under the terms of the GNU Library General Public
8  License as published by the Free Software Foundation; either
9  version 2 of the License, or (at your option) any later version.
10 
11  This library is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  Library General Public License for more details.
15 
16  You should have received a copy of the GNU Library General Public License
17  along with this library; see the file COPYING.LIB. If not, write to
18  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19  Boston, MA 02110-1301, USA.
20 */
21 
22 
23 /*
24  * kipc.cpp: Send a message to one/all KDE apps.
25  *
26  * $Id$
27  */
28 #include "config.h"
29 
30 #include <tqevent.h>
31 #include <tqwindowdefs.h>
32 
33 #if defined Q_WS_X11
34 #include <X11/X.h>
35 #include <X11/Xlib.h>
36 #include <kxerrorhandler.h>
37 #endif
38 
39 #include <kipc.h>
40 
41 
42 #if defined Q_WS_X11
43 static long getSimpleProperty(Window w, Atom a)
44 {
45  Atom real_type;
46  int format;
47  unsigned long n, extra, res = 0;
48  int status;
49  unsigned char *p = 0;
50 
51  status = XGetWindowProperty(tqt_xdisplay(), w, a, 0L, 1L, False, a,
52  &real_type, &format, &n, &extra, &p);
53  if ((status == Success) && (n == 1) && (format == 32))
54  res = *(unsigned long*)p;
55  if (p) XFree(p);
56  return res;
57 }
58 #endif
59 
60 void KIPC::sendMessage(Message msg, WId w, int data)
61 {
62 #if defined Q_WS_X11
63  static Atom a = 0;
64  if (a == 0)
65  a = XInternAtom(tqt_xdisplay(), "KIPC_COMM_ATOM", False);
66  XEvent ev;
67  ev.xclient.type = ClientMessage;
68  ev.xclient.display = tqt_xdisplay();
69  ev.xclient.window = (Window) w;
70  ev.xclient.message_type = a;
71  ev.xclient.format = 32;
72  ev.xclient.data.l[0] = msg;
73  ev.xclient.data.l[1] = data;
74  XSendEvent(tqt_xdisplay(), (Window) w, False, 0L, &ev);
75 
76  // KDE 1 support
77  static Atom kde1 = 0;
78  if ( msg == PaletteChanged || msg == FontChanged ) {
79  if ( kde1 == 0 )
80  kde1 = XInternAtom(tqt_xdisplay(), "KDEChangeGeneral", False );
81  ev.xclient.message_type = kde1;
82  XSendEvent(tqt_xdisplay(), (Window) w, False, 0L, &ev);
83  }
84 
85 #endif
86 }
87 
88 
89 void KIPC::sendMessageAll(Message msg, int data)
90 {
91 #if defined Q_WS_X11
92  unsigned int i, nrootwins;
93  Window dw1, dw2, *rootwins = 0;
94  Display *dpy = tqt_xdisplay();
95  int screen_count = ScreenCount(dpy);
96 
97  KXErrorHandler handler;
98  for (int s = 0; s < screen_count; s++) {
99  Window root = RootWindow(dpy, s);
100 
101  XQueryTree(dpy, root, &dw1, &dw2, &rootwins, &nrootwins);
102  Atom a = XInternAtom(tqt_xdisplay(), "KDE_DESKTOP_WINDOW", False);
103  for (i = 0; i < nrootwins; i++)
104  {
105  if (getSimpleProperty(rootwins[i], a) != 0L)
106  sendMessage(msg, rootwins[i], data);
107  }
108  XFree((char *) rootwins);
109  }
110  XSync(dpy,False);
111 #endif
112 }
113 
KXErrorHandler
This class simplifies handling of X errors.
Definition: kxerrorhandler.h:57
KIPC::sendMessage
static void sendMessage(Message msg, WId w, int data=0)
Send a message to a specific application.
Definition: kipc.cpp:60
KIPC::sendMessageAll
static void sendMessageAll(Message msg, int data=0)
Send a message to all KDE application on the current display.
Definition: kipc.cpp:89
KIPC::Message
Message
A identifier for messages.
Definition: kipc.h:56

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