Fix fancy logout not allowing interaction with save dialogs

This closes Bug 922
Fix desktop wallpaper export failing when triggered by krootbacking or ksmserver and konsole or kdesktop_lock not previously loaded
(cherry picked from commit d2f8fca98e)

krootbacking/krootbacking.cpp

@@ -54,6 +54,8 @@ public:
 KRootBacking::KRootBacking()
     : TQObject(KApplication::desktop(), "KRootBacking" ), m_Desk(0), m_timeout(0)
 {
+    enableExports();
+
     init();
 }
 

ksmserver/shutdown.cpp

@@ -189,24 +189,6 @@ void KSMServer::shutdownInternal( KApplication::ShutdownConfirm confirm,
         // shall we save the session on logout?
         saveSession = ( config->readEntry( "loginMode", "restorePreviousLogout" ) == "restorePreviousLogout" );
 
-        if (showFancyLogout) {
-            KSMShutdownIPFeedback::showit(); // hide the UGLY logout process from the user
-            shutdownNotifierIPDlg = KSMShutdownIPDlg::showShutdownIP();
-            while (!KSMShutdownIPFeedback::ispainted()) {
-                tqApp->processEvents();
-            }
-        }
-
-        // synchronize any folders that were requested for shutdown sync
-        if (shutdownNotifierIPDlg) {
-            static_cast<KSMShutdownIPDlg*>(shutdownNotifierIPDlg)->setStatusMessage(i18n("Synchronizing remote folders").append("..."));
-        }
-        KRsync krs(this, "");
-        krs.executeLogoutAutoSync();
-        if (shutdownNotifierIPDlg) {
-            static_cast<KSMShutdownIPDlg*>(shutdownNotifierIPDlg)->setStatusMessage(i18n("Saving your settings..."));
-        }
-
         if ( saveSession )
             sessionGroup = TQString("Session: ") + SESSION_PREVIOUS_LOGOUT;
 
@@ -252,9 +234,9 @@ void KSMServer::shutdownInternal( KApplication::ShutdownConfirm confirm,
             completeShutdownOrCheckpoint();
     }
     else {
-        if (showFancyLogout) {
-            KSMShutdownIPFeedback::stop();
-        }
+       if (showFancyLogout) {
+           KSMShutdownIPFeedback::stop();
+       }
     }
     dialogActive = false;
 }
@@ -502,6 +484,25 @@ void KSMServer::completeShutdownOrCheckpoint()
     if ( waitForPhase2 )
         return;
 
+    bool showFancyLogout = KConfigGroup(KGlobal::config(), "Logout").readBoolEntry("showFancyLogout", true);
+    if (showFancyLogout) {
+        KSMShutdownIPFeedback::showit(); // hide the UGLY logout process from the user
+        shutdownNotifierIPDlg = KSMShutdownIPDlg::showShutdownIP();
+        while (!KSMShutdownIPFeedback::ispainted()) {
+            tqApp->processEvents();
+        }
+    }
+
+    // synchronize any folders that were requested for shutdown sync
+    if (shutdownNotifierIPDlg) {
+        static_cast<KSMShutdownIPDlg*>(shutdownNotifierIPDlg)->setStatusMessage(i18n("Synchronizing remote folders").append("..."));
+    }
+    KRsync krs(this, "");
+    krs.executeLogoutAutoSync();
+    if (shutdownNotifierIPDlg) {
+        static_cast<KSMShutdownIPDlg*>(shutdownNotifierIPDlg)->setStatusMessage(i18n("Saving your settings..."));
+    }
+
     if ( saveSession )
         storeSession();
     else

ksmserver/shutdowndlg.cpp

@@ -519,6 +519,11 @@ KSMShutdownIPFeedback::KSMShutdownIPFeedback()
 : TQWidget( 0L, "systemmodaldialogclass", Qt::WStyle_Customize | Qt::WStyle_NoBorder | Qt::WStyle_StaysOnTop ), m_timeout(0), m_isPainted(false), m_sharedRootPixmap(NULL), mPixmapTimeout(0)
 
 {
+	setShown(false);
+	hide();
+
+	enableExports();
+
 	m_sharedRootPixmap = new KRootPixmap(this);
 	m_sharedRootPixmap->setCustomPainting(true);
 	connect(m_sharedRootPixmap, TQT_SIGNAL(backgroundUpdated(const TQPixmap &)), this, TQT_SLOT(slotSetBackgroundPixmap(const TQPixmap &)));
@@ -545,15 +550,36 @@ KSMShutdownIPFeedback::KSMShutdownIPFeedback()
 	setBackgroundPixmap( m_root );
 	setGeometry( TQApplication::desktop()->geometry() );
 	setBackgroundMode( TQWidget::NoBackground );
-
-	setShown(true);
 }
 
 void KSMShutdownIPFeedback::showNow()
 {
+	setShown(true);
+
 	TQTimer::singleShot( 0, this, SLOT(slotPaintEffect()) );
 }
 
+void KSMShutdownIPFeedback::enableExports()
+{
+#ifdef Q_WS_X11
+	kdDebug(270) << k_lineinfo << "activating background exports.\n";
+	DCOPClient *client = kapp->dcopClient();
+	if (!client->isAttached()) {
+		client->attach();
+	}
+	TQByteArray data;
+	TQDataStream args( data, IO_WriteOnly );
+	args << 1;
+	
+	TQCString appname( "kdesktop" );
+	int screen_number = DefaultScreen(qt_xdisplay());
+	if ( screen_number )
+	appname.sprintf("kdesktop-screen-%d", screen_number );
+	
+	client->send( appname, "KBackgroundIface", "setExport(int)", data );
+#endif
+}
+
 KSMShutdownIPFeedback::~KSMShutdownIPFeedback()
 {
 	if (m_sharedRootPixmap) {

ksmserver/shutdowndlg.h

@@ -96,6 +96,13 @@ public slots:
     void slotPaintEffect();
     void slotSetBackgroundPixmap(const TQPixmap &);
 
+private:
+	/**
+	* Asks KDesktop to export the desktop background as a KSharedPixmap.
+	* This method uses DCOP to call KBackgroundIface/setExport(int).
+	*/
+	void enableExports();
+
 private:
     static KSMShutdownIPFeedback * s_pSelf;
     KSMShutdownIPFeedback();