2 files changed, 26 insertions, 1 deletions
diff --git a/src/gui/itemviews/qabstractproxymodel.cpp b/src/gui/itemviews/qabstractproxymodel.cpp
index 51dfa7a..12c4c7b 100644
--- a/src/gui/itemviews/qabstractproxymodel.cpp
+++ b/src/gui/itemviews/qabstractproxymodel.cpp
@@ -121,12 +121,15 @@ QAbstractProxyModel::~QAbstractProxyModel()
 void QAbstractProxyModel::setSourceModel(QAbstractItemModel *sourceModel)
 {
     Q_D(QAbstractProxyModel);
-    if (d->model)
+    if (d->model) {
         disconnect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed()));
+        disconnect(d->model, SIGNAL(modelReset()), this, SLOT(resetInternalData()));
+    }
 
     if (sourceModel) {
         d->model = sourceModel;
         connect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed()));
+        connect(d->model, SIGNAL(modelReset()), this, SLOT(resetInternalData()));
     } else {
         d->model = QAbstractItemModelPrivate::staticEmptyModel();
     }
@@ -380,6 +383,25 @@ Qt::DropActions QAbstractProxyModel::supportedDropActions() const
     return d->model->supportedDropActions();
 }
 
+/*
+    \since 4.8
+
+    This slot is called just after the internal data of a model is cleared
+    while it is being reset.
+
+    This slot is provided the convenience of subclasses of concrete proxy
+    models, such as subclasses of QSortFilterProxyModel which maintain extra
+    data.
+
+    \snippet doc/src/snippets/code/src_corelib_kernel_qabstractitemmodel.cpp 10
+
+    \sa modelAboutToBeReset(), modelReset()
+*/
+void QAbstractProxyModel::resetInternalData()
+{
+
+}
+
 QT_END_NAMESPACE
 
 #include "moc_qabstractproxymodel.cpp"
diff --git a/src/gui/itemviews/qabstractproxymodel.h b/src/gui/itemviews/qabstractproxymodel.h
index a5a1168..14eaa5a 100644
--- a/src/gui/itemviews/qabstractproxymodel.h
+++ b/src/gui/itemviews/qabstractproxymodel.h
@@ -95,6 +95,9 @@ public:
     QStringList mimeTypes() const;
     Qt::DropActions supportedDropActions() const;
 
+protected slots:
+    void resetInternalData();
+
 protected:
     QAbstractProxyModel(QAbstractProxyModelPrivate &, QObject *parent);