1 files changed, 95 insertions, 0 deletions
diff --git a/kdesktop/kdesktopapp.cpp b/kdesktop/kdesktopapp.cpp
new file mode 100644
index 000000000..f7324362c
--- /dev/null
+++ b/kdesktop/kdesktopapp.cpp
@@ -0,0 +1,95 @@
+/* This file is part of the KDE project
+   Copyright (C) 2007 Dennis Kasprzyk <onestone@opencompositing.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.
+*/
+
+#include <kdesktopapp.h>
+
+KDesktopApp::KDesktopApp():
+KUniqueApplication()
+{
+#ifdef COMPOSITE
+    initCmBackground();
+#endif
+}
+
+KDesktopApp::KDesktopApp(Display * dpy, Qt::HANDLE visual, Qt::HANDLE colormap):
+KUniqueApplication(dpy, visual, colormap)
+{
+#ifdef COMPOSITE
+    initCmBackground();
+#endif
+}
+
+#ifdef COMPOSITE
+void KDesktopApp::initCmBackground()
+{
+    Atom type;
+    int format;
+    unsigned long num, rest;
+    unsigned char *data;
+
+    m_bgSupported = false;
+    m_cmBackground =
+            XInternAtom (qt_xdisplay(), "_COMPIZ_WALLPAPER_SUPPORTED", false);
+
+    XSelectInput (qt_xdisplay(), qt_xrootwin(), PropertyChangeMask);
+
+    if (XGetWindowProperty (qt_xdisplay(), qt_xrootwin(), m_cmBackground,
+                            0, 1, FALSE,  XA_CARDINAL, &type, &format, &num,
+                            &rest, &data) == Success && num)
+    {
+        if (type == XA_CARDINAL)
+            m_bgSupported = (*data == 1);
+        XFree (data);
+    }
+}
+
+bool KDesktopApp::x11EventFilter (XEvent * xevent)
+{
+    if (xevent->type == PropertyNotify &&
+        xevent->xproperty.window == qt_xrootwin() &&
+        xevent->xproperty.atom == m_cmBackground)
+    {
+        Atom type;
+        int format;
+        unsigned long num, rest;
+        unsigned char *data;
+    
+        Bool supported = false;
+        
+        if (XGetWindowProperty (qt_xdisplay(), qt_xrootwin(), m_cmBackground,
+                            0, 1, FALSE,  XA_CARDINAL, &type, &format, &num,
+                            &rest, &data) == Success && num)
+        {
+            if (type == XA_CARDINAL)
+                supported = (*data == 1);
+            XFree (data);
+        }
+
+        if (m_bgSupported != supported)
+        {
+            m_bgSupported = supported;
+            emit cmBackgroundChanged(supported);
+        }
+    }
+    return KUniqueApplication::x11EventFilter (xevent);
+}
+
+#endif
+
+#include "kdesktopapp.moc"