Merge branch '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.7-integration

* '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-2: (53 commits)
  removed a few warnings on wince builds
  Removed double setting of _WIN32_WINNT
  QTreeView: remove dead code.
  doc: Clarify effect of QFont::NoFontMerging
  Revert "Implement heightForWidth support for QTabWidget and QStackedLayout."
  build fix for S60
  Improve handling of QAction in soft key manager
  Remove useless assert
  qdrawhelper: fix optim in 2245641ba
  QSlider and StyleSheet: fix one pixel error while drawing the SliderAddPage
  accelerate QWindowsPipeWriter for bigger chunks of data
  Fix antialiasing with transformed text in OpenGL2 paint engine
  Fix flattening of largely scaled, thin, dashed beziers.
  Increased the precision used to flatten beziers
  Fix QT_NO_MOVIE
  Fix compile error with QT_NO_ACTION in QtGui
  Fix QT_NO_COMPLETER
  Fix QT_NO_FSCOMPLETER
  Fix QT_NO_FILESYSTEMMODEL
  Build fix
  ...

1 files changed, 5 insertions, 1 deletions

diff --git a/src/gui/itemviews/qtreewidget.cpp b/src/gui/itemviews/qtreewidget.cpp
index 19ed10b..4c80325 100644
--- a/src/gui/itemviews/qtreewidget.cpp
+++ b/src/gui/itemviews/qtreewidget.cpp
@@ -3039,10 +3039,14 @@ QList<QTreeWidgetItem*> QTreeWidget::selectedItems() const
     Q_D(const QTreeWidget);
     QModelIndexList indexes = selectionModel()->selectedIndexes();
     QList<QTreeWidgetItem*> items;
+    items.reserve(indexes.count());
+    QSet<QTreeWidgetItem *> seen;
+    seen.reserve(indexes.count());
     for (int i = 0; i < indexes.count(); ++i) {
         QTreeWidgetItem *item = d->item(indexes.at(i));
-        if (isItemHidden(item) || items.contains(item)) // ### slow, optimize later
+        if (isItemHidden(item) || seen.contains(item))
             continue;
+        seen.insert(item);
         items.append(item);
     }
     return items;