[Kdenlive-svn] [kdenlive] src: Allow to scroll in MonitorScene using the mouse wheel.

[Till T. <ro...@tt...>]

Git commit 7de1fe2c10a6bd6ea27eb4d9716f36c0ff760a27 by Till Theato.
Committed on 07/04/2012 at 22:06.
Pushed by theato into branch 'master'.

Allow to scroll in MonitorScene using the mouse wheel.

M  +10   -1    src/monitorscene.cpp

http://commits.kde.org/kdenlive/7de1fe2c10a6bd6ea27eb4d9716f36c0ff760a27

diff --git a/src/monitorscene.cpp b/src/monitorscene.cpp
index 089e5e9..8970d82 100644
--- a/src/monitorscene.cpp
+++ b/src/monitorscene.cpp
@@ -27,6 +27,7 @@
 #include <QGraphicsView>
 #include <QGraphicsPixmapItem>
 #include <QGraphicsSceneMouseEvent>
+#include <QScrollBar>
 
 
 MonitorScene::MonitorScene(Render *renderer, QObject* parent) :
@@ -250,7 +251,15 @@ void MonitorScene::wheelEvent(QGraphicsSceneWheelEvent* event)
             slotZoomOut(5);
         }
     } else {
-        QGraphicsScene::wheelEvent(event);
+        QAbstractSlider::SliderAction action;
+        if (event->delta() > 0)
+            action = QAbstractSlider::SliderSingleStepSub;
+        else
+            action = QAbstractSlider::SliderSingleStepAdd;
+        if (event->orientation() == Qt::Horizontal)
+            m_view->horizontalScrollBar()->triggerAction(action);
+        else
+            m_view->verticalScrollBar()->triggerAction(action);
     }
 
     event->accept();