Update background wallpaper image on desktop switch

2 files changed, 37 insertions, 4 deletions

diff --git a/client/myrootpixmap.cc b/client/myrootpixmap.cc
index abc1703..11d5eb9 100644
--- a/client/myrootpixmap.cc
+++ b/client/myrootpixmap.cc
@@ -11,6 +11,7 @@
  */
  
 /* Modified by Sascha Hlusiak */
+/* Further modified 11/18/2014 by Timothy Pearson <kb9vqf@pearsoncomputing.net> */
 
 #include <tqwidget.h>
 #include <tqtimer.h>
@@ -22,15 +23,28 @@
 #include <kimageeffect.h>
 #include <kpixmapio.h>
 #include <twinmodule.h>
+#include <twin.h>
 #include <kdebug.h>
 #include <netwm.h>
 #include <dcopclient.h>
+#include <dcopref.h>
 #include <tqpainter.h>
 
 #include <ksharedpixmap.h>
 #include "myrootpixmap.h"
 
+static TQString wallpaperForDesktop(int desktop)
+{
+    return DCOPRef("kdesktop", "KBackgroundIface").call("currentWallpaper", desktop);
+}
 
+class KMyRootPixmapData
+{
+public:
+#ifdef Q_WS_X11
+    KWinModule *twin;
+#endif
+};
 
 KMyRootPixmap::KMyRootPixmap( TQWidget * widget, const char *name )
     : TQObject(widget, name ? name : "KMyRootPixmap" ) 
@@ -46,7 +60,7 @@ KMyRootPixmap::KMyRootPixmap( TQWidget *, TQObject *parent, const char *name )
 
 void KMyRootPixmap::init()
 {
-//    d = new KMyRootPixmapData;
+    d = new KMyRootPixmapData;
 //    m_Fade = 0;
     m_pPixmap = new TDESharedPixmap;
 //    m_pTimer = new TQTimer( this );
@@ -59,6 +73,11 @@ void KMyRootPixmap::init()
     connect(m_pPixmap, TQT_SIGNAL(done(bool)), TQT_SLOT(slotDone(bool)));
 //    connect(m_pTimer, TQT_SIGNAL(timeout()), TQT_SLOT(repaint()));
 
+#ifdef Q_WS_X11
+    d->twin = new KWinModule( this );
+    connect(d->twin, TQT_SIGNAL(currentDesktopChanged(int)), TQT_SLOT(desktopChanged(int)));
+#endif
+
 //    d->toplevel = m_pWidget->topLevelWidget();
 //    d->toplevel->installEventFilter(this);
 }
@@ -66,7 +85,20 @@ void KMyRootPixmap::init()
 KMyRootPixmap::~KMyRootPixmap()
 {
     delete m_pPixmap;
-//    delete d;
+    delete d;
+}
+
+void KMyRootPixmap::desktopChanged(int desktop)
+{
+    if (wallpaperForDesktop(m_Desk) == wallpaperForDesktop(desktop) &&
+	!wallpaperForDesktop(m_Desk).isNull())
+	return;
+
+// #ifdef Q_WS_X11
+//     if (KWin::windowInfo(m_pWidget->topLevelWidget()->winId()).desktop() == NET::OnAllDesktops &&
+// 	pixmapName(m_Desk) != pixmapName(desktop))
+// #endif
+	repaint(true);
 }
 
 int KMyRootPixmap::currentDesktop() const
diff --git a/client/myrootpixmap.h b/client/myrootpixmap.h
index 02c450a..26ebc9c 100644
--- a/client/myrootpixmap.h
+++ b/client/myrootpixmap.h
@@ -9,7 +9,7 @@
  */
 
 /* Modified by Sascha Hlusiak */
- 
+/* Further modified 11/18/2014 by Timothy Pearson <kb9vqf@pearsoncomputing.net> */
 
 #ifndef __KRootPixmap_h_Included__
 #define __KRootPixmap_h_Included__
@@ -78,6 +78,7 @@ protected:
 private slots:
 //    void slotBackgroundChanged(int);
     void slotDone(bool);
+    void desktopChanged(int desktop);
 
 private:
     bool m_bActive, m_bInit/*, m_bCustomPaint*/;
@@ -90,7 +91,7 @@ private:
 //    TQWidget *m_pWidget;
 //    TQTimer *m_pTimer;
     TDESharedPixmap *m_pPixmap;
-//    KMyRootPixmapData *d;
+   KMyRootPixmapData *d;
 
     void init();
 };