kipc.cpp
/* This file is part of the KDE libraries
Copyright (C) 1999 Mattias Ettrich (ettrich@kde.org)
Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/*
* kipc.cpp: Send a message to one/all KDE apps.
*
* $Id: kipc.cpp 482239 2005-11-22 08:32:28Z coolo $
*/
#include "config.h"
#include <qwindowdefs.h>
#if defined Q_WS_X11
#include <X11/X.h>
#include <X11/Xlib.h>
#include <kxerrorhandler.h>
#endif
#include <kipc.h>
#if defined Q_WS_X11
static long getSimpleProperty(Window w, Atom a)
{
Atom real_type;
int format;
unsigned long n, extra, res = 0;
int status;
unsigned char *p = 0;
status = XGetWindowProperty(qt_xdisplay(), w, a, 0L, 1L, False, a,
&real_type, &format, &n, &extra, &p);
if ((status == Success) && (n == 1) && (format == 32))
res = *(unsigned long*)p;
if (p) XFree(p);
return res;
}
#endif
void KIPC::sendMessage(Message msg, WId w, int data)
{
#if defined Q_WS_X11
static Atom a = 0;
if (a == 0)
a = XInternAtom(qt_xdisplay(), "KIPC_COMM_ATOM", False);
XEvent ev;
ev.xclient.type = ClientMessage;
ev.xclient.display = qt_xdisplay();
ev.xclient.window = (Window) w;
ev.xclient.message_type = a;
ev.xclient.format = 32;
ev.xclient.data.l[0] = msg;
ev.xclient.data.l[1] = data;
XSendEvent(qt_xdisplay(), (Window) w, False, 0L, &ev);
// KDE 1 support
static Atom kde1 = 0;
if ( msg == PaletteChanged || msg == FontChanged ) {
if ( kde1 == 0 )
kde1 = XInternAtom(qt_xdisplay(), "KDEChangeGeneral", False );
ev.xclient.message_type = kde1;
XSendEvent(qt_xdisplay(), (Window) w, False, 0L, &ev);
}
#endif
}
void KIPC::sendMessageAll(Message msg, int data)
{
#if defined Q_WS_X11
unsigned int i, nrootwins;
Window dw1, dw2, *rootwins = 0;
Display *dpy = qt_xdisplay();
int screen_count = ScreenCount(dpy);
KXErrorHandler handler;
for (int s = 0; s < screen_count; s++) {
Window root = RootWindow(dpy, s);
XQueryTree(dpy, root, &dw1, &dw2, &rootwins, &nrootwins);
Atom a = XInternAtom(qt_xdisplay(), "KDE_DESKTOP_WINDOW", False);
for (i = 0; i < nrootwins; i++)
{
if (getSimpleProperty(rootwins[i], a) != 0L)
sendMessage(msg, rootwins[i], data);
}
XFree((char *) rootwins);
}
XSync(dpy,False);
#endif
}
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:59
KIPC::sendMessageAll
static void sendMessageAll(Message msg, int data=0)
Send a message to all KDE application on the current display.
Definition: kipc.cpp:88
KIPC::Message
Message
A identifier for messages.
Definition: kipc.h:56

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