Disable smooth-scrolling dependent on the graphics-effect level

If the graphics-effect-level has been set to NoEffects (systemsettings -> Appearance
-> Style -> Fine Tuning), the smooth scrolling in Dolphin will be disabled.

Additionally the duration for the smooth-scrolling has been decreased from 200 ms
to 100 ms to reduce the lag.

A wrong calculation of the end-value has been fixed that might trigger
a wrong position of the content.

BUG: 291740
BUG: 291607
FIXED-IN: 4.8.0

1 files changed, 3 insertions, 1 deletions

diff --git a/src/kitemviews/kitemlistwidget.cpp b/src/kitemviews/kitemlistwidget.cpp
index cd2bf4d40..8e6c728f7 100644
--- a/src/kitemviews/kitemlistwidget.cpp
+++ b/src/kitemviews/kitemlistwidget.cpp
@@ -28,6 +28,7 @@
 
 #include <KDebug>
 
+#include <KGlobalSettings>
 #include <QApplication>
 #include <QPainter>
 #include <QPropertyAnimation>
@@ -243,7 +244,8 @@ void KItemListWidget::setHovered(bool hovered)
 
     if (!m_hoverAnimation) {
         m_hoverAnimation = new QPropertyAnimation(this, "hoverOpacity", this);
-        m_hoverAnimation->setDuration(200);
+        const int duration = (KGlobalSettings::graphicEffectsLevel() == KGlobalSettings::NoEffects) ? 1 : 200;       
+        m_hoverAnimation->setDuration(duration);
         connect(m_hoverAnimation, SIGNAL(finished()), this, SLOT(slotHoverAnimationFinished()));
     }
     m_hoverAnimation->stop();