Fix incorrect drawing of the hovered row on QTreeView with some styles.

Some styles such as oxygen, or gtk, require the whole row to be
redrawn in case of mouse hover the items.
There was special code that handle that in the MouseMove event of
the QTreeView, but that did not covered all the case (such as
scrolling with the mouse wheel)

Reviewed-by: Gabriel

1 files changed, 9 insertions, 2 deletions

diff --git a/src/gui/itemviews/qabstractitemview.cpp b/src/gui/itemviews/qabstractitemview.cpp
index f447989ff6..f852e67f16 100644
--- a/src/gui/itemviews/qabstractitemview.cpp
+++ b/src/gui/itemviews/qabstractitemview.cpp
@@ -146,9 +146,16 @@ void QAbstractItemViewPrivate::setHoverIndex(const QPersistentModelIndex &index)
     if (hover == index)
         return;
 
-    q->update(hover); //update the old one
+    if (selectionBehavior != QAbstractItemView::SelectRows) {
+        q->update(hover); //update the old one
+        q->update(index); //update the new one
+    } else {
+        QRect oldHoverRect = q->visualRect(hover);
+        QRect newHoverRect = q->visualRect(index);
+        viewport->update(QRect(0, newHoverRect.y(), viewport->width(), newHoverRect.height()));
+        viewport->update(QRect(0, oldHoverRect.y(), viewport->width(), oldHoverRect.height()));
+    }
     hover = index;
-    q->update(hover); //update the new one
 }
 
 void QAbstractItemViewPrivate::checkMouseMove(const QPersistentModelIndex &index)