QHeaderView - do not keep indexes from an obsolete model

When we call setModel persistentHiddenSections are no longer relevant.
It contains indexes from the previous model.

This solves:

Task-number: QTBUG-18196

Change-Id: Ida02fa63a915695e3730fd63995ac5f8520ae827
Reviewed-by: Andy Shaw <andy.shaw@digia.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

diff --git a/src/widgets/itemviews/qheaderview.cpp b/src/widgets/itemviews/qheaderview.cpp
index 21c2e90..feda750 100644 (file)
--- a/src/widgets/itemviews/qheaderview.cpp
+++ b/src/widgets/itemviews/qheaderview.cpp
@@ -350,6 +350,7 @@ void QHeaderView::setModel(QAbstractItemModel *model)
     if (model == this->model())
         return;
     Q_D(QHeaderView);
+    d->persistentHiddenSections.clear();
     if (d->model && d->model != QAbstractItemModelPrivate::staticEmptyModel()) {
     if (d->orientation == Qt::Horizontal) {
         QObject::disconnect(d->model, SIGNAL(columnsInserted(QModelIndex,int,int)),