Draw proper drop index, since on some platforms (OS X :( ) visualRect() and indexAt() aren't commutative...

src/sourcetree/sourcetreeview.cpp

@@ -435,6 +435,7 @@ SourceTreeView::dragEnterEvent( QDragEnterEvent* event )
     {
         m_dragging = true;
         m_dropRect = QRect();
+        m_dropIndex = QPersistentModelIndex();
 
         qDebug() << "Accepting Drag Event";
         event->setDropAction( Qt::CopyAction );
@@ -450,6 +451,8 @@ SourceTreeView::dragLeaveEvent( QDragLeaveEvent* event )
 
     m_dragging = false;
     setDirtyRegion( m_dropRect );
+
+    m_dropIndex = QPersistentModelIndex();
 }
 
 
@@ -464,6 +467,7 @@ SourceTreeView::dragMoveEvent( QDragMoveEvent* event )
         setDirtyRegion( m_dropRect );
         const QPoint pos = event->pos();
         const QModelIndex index = indexAt( pos );
+        m_dropIndex = QPersistentModelIndex( index );
 
         if ( index.isValid() )
         {
@@ -497,6 +501,7 @@ SourceTreeView::dropEvent( QDropEvent* event )
 {
     QTreeView::dropEvent( event );
     m_dragging = false;
+    m_dropIndex = QPersistentModelIndex();
 }
 
 
@@ -527,8 +532,7 @@ SourceTreeView::paintEvent( QPaintEvent* event )
     if ( m_dragging && !m_dropRect.isEmpty() )
     {
         QPainter painter( viewport() );
-        const QModelIndex index = indexAt( m_dropRect.topLeft() );
+        const QRect itemRect = visualRect( m_dropIndex );
-        const QRect itemRect = visualRect( index );
 
         QStyleOptionViewItemV4 opt;
         opt.initFrom( this );

src/sourcetree/sourcetreeview.h

@@ -94,6 +94,7 @@ private:
 
     bool m_dragging;
     QRect m_dropRect;
+    QPersistentModelIndex m_dropIndex;
 };
 
 #endif // SOURCETREEVIEW_H