Added smooth crossfade effect option when changing the desktop wallpaper.

1 files changed, 18 insertions, 0 deletions

diff --git a/kcontrol/background/bgdialog.cpp b/kcontrol/background/bgdialog.cpp
index 9c0cd5e1b..c221a50fe 100644
--- a/kcontrol/background/bgdialog.cpp
+++ b/kcontrol/background/bgdialog.cpp
@@ -174,6 +174,10 @@ BGDialog::BGDialog(TQWidget* parent, TDEConfig* _config, bool _multidesktop)
    connect(m_cbBlendReverse, TQT_SIGNAL(toggled(bool)),
            TQT_SLOT(slotBlendReverse(bool)));
 
+   // Crossfading background
+   connect(m_cbCrossFadeBg, TQT_SIGNAL(toggled(bool)),
+           TQT_SLOT(slotCrossFadeBg(bool)));
+
    // advanced options
    connect(m_buttonAdvanced, TQT_SIGNAL(clicked()),
            TQT_SLOT(slotAdvanced()));
@@ -304,6 +308,7 @@ void BGDialog::makeReadOnly()
     m_cbBlendReverse->setEnabled( false );
     m_buttonAdvanced->setEnabled( false );
     m_buttonGetNew->setEnabled( false );
+    m_cbCrossFadeBg->setEnabled( false );
 }
 
 void BGDialog::load( bool useDefaults )
@@ -781,6 +786,8 @@ void BGDialog::updateUI()
     m_cbBlendReverse->setChecked(r->reverseBlending());
     m_sliderBlend->setValue( r->blendBalance() / 10 );
 
+    m_cbCrossFadeBg->setChecked(r->crossFadeBg());
+
     m_comboBlend->blockSignals(false);
     m_sliderBlend->blockSignals(false);
 
@@ -1295,6 +1302,17 @@ void BGDialog::slotBlendReverse(bool b)
    eRenderer()->start(true);
 }
 
+void BGDialog::slotCrossFadeBg(bool b)
+{
+   if (b == eRenderer()->crossFadeBg())
+      return;
+   emit changed(true);
+
+   eRenderer()->stop();
+   eRenderer()->setCrossFadeBg(b);
+   eRenderer()->start(true);
+}
+
 void BGDialog::desktopResized()
 {
    for (unsigned i = 0; i < m_renderer.size(); ++i)