Add a cut-off for simple rectangle lookups.

Make sure we use the rect-variation of QGraphicsScene's item lookup
functions if the view has a simple transform and a simple expose
region.

Reviewed-by: Bjoern Erik Nilsen <bjorn.nilsen@nokia.com>
(cherry picked from commit 4020327503eaefae42da4bd6e71125b6972ac97f)

1 files changed, 5 insertions, 0 deletions

diff --git a/src/gui/graphicsview/qgraphicsview.cpp b/src/gui/graphicsview/qgraphicsview.cpp
index 819b75a..f5170a4 100644
--- a/src/gui/graphicsview/qgraphicsview.cpp
+++ b/src/gui/graphicsview/qgraphicsview.cpp
@@ -1056,6 +1056,11 @@ QList<QGraphicsItem *> QGraphicsViewPrivate::findItems(const QRegion &exposedReg
     }
 
     if (scene->d_func()->largestUntransformableItem.isNull()) {
+        if (exposedRegion.numRects() == 1 && matrix.type() <= QTransform::TxScale) {
+            return scene->d_func()->items_helper(exposedScenePath.controlPointRect(),
+                                                 Qt::IntersectsItemBoundingRect,
+                                                 Qt::DescendingOrder);
+        }
         return scene->d_func()->items_helper(exposedScenePath,
                                              Qt::IntersectsItemBoundingRect,
                                              Qt::DescendingOrder);