Fix scrolling on hidpi screens

[dolphin.git] / src / kitemviews / private / kitemlistsmoothscroller.cpp

diff --git a/src/kitemviews/private/kitemlistsmoothscroller.cpp b/src/kitemviews/private/kitemlistsmoothscroller.cpp
index e70f478904dbb81619e67ac07287be48ca9f95bf..6bfdba4c9ae5fbd911716e96c136685e7a5ee22e 100644 (file)
--- a/src/kitemviews/private/kitemlistsmoothscroller.cpp
+++ b/src/kitemviews/private/kitemlistsmoothscroller.cpp
@@ -19,6 +19,7 @@
 
 #include "kitemlistsmoothscroller.h"
 
+#include <QApplication>
 #include <QEvent>
 #include <QPropertyAnimation>
 #include <QScrollBar>
@@ -171,8 +172,7 @@ bool KItemListSmoothScroller::eventFilter(QObject* obj, QEvent* event)
         break;
 
     case QEvent::Wheel:
-        handleWheelEvent(static_cast<QWheelEvent*>(event));
-        break;
+        return false; // we're the ones sending them
 
     default:
         break;
@@ -192,18 +192,14 @@ void KItemListSmoothScroller::slotAnimationStateChanged(QAbstractAnimation::Stat
 
 void KItemListSmoothScroller::handleWheelEvent(QWheelEvent* event)
 {
-    const int numDegrees = event->delta() / 8;
-    const int numSteps = numDegrees / 15;
-
     const bool previous = m_smoothScrolling;
 
     m_smoothScrolling = true;
-    const int value = m_scrollBar->value();
-    const int pageStep = m_scrollBar->pageStep();
-    m_scrollBar->setValue(value - numSteps * pageStep);
 
-    m_smoothScrolling = previous;
+    QWheelEvent copy = *event;
+    QApplication::sendEvent(m_scrollBar, &copy);
+    event->setAccepted(copy.isAccepted());
 
-    event->accept();
+    m_smoothScrolling = previous;
 }