Prefer composited logout effect if possible.

I'm just having problems with changing the saturation, I cannot
get it to simply go to gray by reducing data.saturation :-/.

CCMAIL: rivolaks@hot.ee


svn path=/trunk/KDE/kdebase/workspace/; revision=736342

effects/CMakeLists.txt

@@ -41,6 +41,7 @@ SET(kwin4_effect_builtins_sources
     diminactive.cpp
     fade.cpp
     fallapart.cpp
+    logout.cpp
     maketransparent.cpp
     minimizeanimation.cpp
     presentwindows.cpp
@@ -57,6 +58,7 @@ install( FILES
     diminactive.desktop
     fade.desktop
     fallapart.desktop
+    logout.desktop
     maketransparent.desktop
     minimizeanimation.desktop
     presentwindows.desktop

effects/logout.cpp

@@ -0,0 +1,80 @@
+/*****************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>
+
+You can Freely distribute this program under the GNU General Public
+License. See the file "COPYING" for the exact licensing terms.
+******************************************************************/
+
+#include "logout.h"
+
+#include <kdebug.h>
+
+namespace KWin
+{
+
+KWIN_EFFECT( logout, LogoutEffect )
+
+LogoutEffect::LogoutEffect()
+    : progress( 0 )
+    , logout_window( NULL )
+    {
+    }
+
+void LogoutEffect::prePaintScreen( ScreenPrePaintData& data, int time )
+    {
+    if( logout_window != NULL )
+        {
+        progress = qBound( 0., progress + time / 1000., 1. );
+        data.mask &= ~Effect::PAINT_SCREEN_REGION;
+        }
+    effects->prePaintScreen( data, time );
+    }
+
+void LogoutEffect::paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data )
+    {
+    if( w != logout_window && progress != 0 )
+        {
+        data.saturation *= ( 1 - progress * 0.6 );
+        data.brightness *= ( 1 - progress * 0.6 ); // otherwise saturation doesn't work ???
+        }
+    effects->paintWindow( w, mask, region, data );
+    }
+
+void LogoutEffect::postPaintWindow( EffectWindow* w )
+    {
+    if( logout_window != NULL && w != logout_window && progress != 1 )
+        w->addRepaintFull();
+    effects->postPaintWindow( w );
+    }
+
+void LogoutEffect::windowAdded( EffectWindow* w )
+    {
+    if( isLogoutDialog( w ))
+        {
+        logout_window = w;
+        progress = 0;
+        effects->addRepaintFull();
+        }
+    }
+
+void LogoutEffect::windowClosed( EffectWindow* w )
+    {
+    if( w == logout_window )
+        {
+        logout_window = NULL;
+        progress = 0;
+        effects->addRepaintFull();
+        }
+    }
+
+bool LogoutEffect::isLogoutDialog( EffectWindow* w )
+    { // TODO there should be probably a better way (window type?)
+    if( w->windowClass() == "ksmserver ksmserver" && w->windowRole() == "logoutdialog" )
+        return true;
+    return false;
+    }
+
+} // namespace

effects/logout.desktop

@@ -0,0 +1,18 @@
+[Desktop Entry]
+Encoding=UTF-8
+Name=Logout
+Icon=preferences-system-windows-effect-logout
+Comment=Logout visual effect
+
+Type=Service
+ServiceTypes=KWin/Effect
+X-KDE-PluginInfo-Author=Lubos Lunak
+X-KDE-PluginInfo-Email=l.lunak@kde.org
+X-KDE-PluginInfo-Name=kwin4_effect_logout
+X-KDE-PluginInfo-Version=0.1.0
+X-KDE-PluginInfo-Category=Appearance
+X-KDE-PluginInfo-Depends=
+X-KDE-PluginInfo-License=GPL
+X-KDE-PluginInfo-EnabledByDefault=true
+X-KDE-Library=kwin4_effect_builtins
+X-Ordering=40

effects/logout.h

@@ -0,0 +1,38 @@
+/*****************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>
+
+You can Freely distribute this program under the GNU General Public
+License. See the file "COPYING" for the exact licensing terms.
+******************************************************************/
+
+#ifndef KWIN_LOGOUT_H
+#define KWIN_LOGOUT_H
+
+#include <kwineffects.h>
+
+
+namespace KWin
+{
+
+class LogoutEffect
+    : public Effect
+    {
+    public:
+        LogoutEffect();
+        virtual void prePaintScreen( ScreenPrePaintData& data, int time );
+        virtual void paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data );
+        virtual void postPaintWindow( EffectWindow* w );
+        virtual void windowAdded( EffectWindow* w );
+        virtual void windowClosed( EffectWindow* w );
+    private:
+        bool isLogoutDialog( EffectWindow* w );
+        double progress; // 0-1
+        EffectWindow* logout_window;
+    };
+
+} // namespace
+
+#endif