QHeaderView: make use of LayoutChangeHint in _q_sectionsChanged()

When _q_sectionsChanged() is called from e.g. QSortFilterProxyModel
the LayoutChangeHint is set which can be used to avoid useless work
in this function.

Change-Id: I034db3fcc7a5f9ea7ebc0fa3ffd7429edb154eb7
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/widgets/itemviews/qheaderview_p.h b/src/widgets/itemviews/qheaderview_p.h
index 24dc3bf075..d9fc1baec5 100644
--- a/src/widgets/itemviews/qheaderview_p.h
+++ b/src/widgets/itemviews/qheaderview_p.h
@@ -120,8 +120,12 @@ public:
     void updateHiddenSections(int logicalFirst, int logicalLast);
     void resizeSections(QHeaderView::ResizeMode globalMode, bool useGlobalMode = false);
     void _q_sectionsRemoved(const QModelIndex &,int,int);
-    void _q_sectionsAboutToBeChanged();
-    void _q_sectionsChanged();
+    void _q_sectionsAboutToBeMoved(const QModelIndex &sourceParent, int logicalStart, int logicalEnd, const QModelIndex &destinationParent, int logicalDestination);
+    void _q_sectionsMoved(const QModelIndex &sourceParent, int logicalStart, int logicalEnd, const QModelIndex &destinationParent, int logicalDestination);
+    void _q_sectionsAboutToBeChanged(const QList<QPersistentModelIndex> &parents = QList<QPersistentModelIndex>(),
+                                     QAbstractItemModel::LayoutChangeHint hint = QAbstractItemModel::NoLayoutChangeHint);
+    void _q_sectionsChanged(const QList<QPersistentModelIndex> &parents = QList<QPersistentModelIndex>(),
+                            QAbstractItemModel::LayoutChangeHint hint = QAbstractItemModel::NoLayoutChangeHint);
 
     bool isSectionSelected(int section) const;
     bool isFirstVisibleSection(int section) const;