Use a QVector<int> instead of a QSet<int> in itemviews/models.

The QSet<int> is a more expensive container to use and create, so
it should be avoided.

This is source incompatible compared to earlier Qt 5 for
QAbstractItemView subclasses which reimplement dataChanged, but this
patch changes nothing compared to already-present SiC compared
to Qt 4.

Change-Id: Id95391dfd62a0a7f487a8765790b007badefb937
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

2 files changed, 7 insertions, 6 deletions

diff --git a/src/corelib/itemmodels/qabstractitemmodel.cpp b/src/corelib/itemmodels/qabstractitemmodel.cpp
index dc53021432..0b390341e4 100644
--- a/src/corelib/itemmodels/qabstractitemmodel.cpp
+++ b/src/corelib/itemmodels/qabstractitemmodel.cpp
@@ -1416,7 +1416,7 @@ QAbstractItemModel::~QAbstractItemModel()
 */
 
 /*!
-    \fn void QAbstractItemModel::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QSet<int> &roles = QSet<int>())
+    \fn void QAbstractItemModel::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles = QVector<int>())
 
     This signal is emitted whenever the data in an existing item changes.
 
@@ -1427,9 +1427,10 @@ QAbstractItemModel::~QAbstractItemModel()
     When reimplementing the setData() function, this signal must be emitted
     explicitly.
 
-    The optional roles argument can be used to specify which data roles have actually
-    been modified. An empty set in the roles argument means that all roles should be
-    considered modified.
+    The optional \a roles argument can be used to specify which data roles have actually
+    been modified. An empty vector in the roles argument means that all roles should be
+    considered modified. The order of elements in the roles argument does not have any
+    relevance.
 
     \sa headerDataChanged(), setData(), layoutChanged()
 */
diff --git a/src/corelib/itemmodels/qabstractitemmodel.h b/src/corelib/itemmodels/qabstractitemmodel.h
index ff96fe53d6..976c1600c6 100644
--- a/src/corelib/itemmodels/qabstractitemmodel.h
+++ b/src/corelib/itemmodels/qabstractitemmodel.h
@@ -45,7 +45,7 @@
 #include <QtCore/qvariant.h>
 #include <QtCore/qobject.h>
 #include <QtCore/qhash.h>
-#include <QtCore/qset.h>
+#include <QtCore/qvector.h>
 
 QT_BEGIN_HEADER
 
@@ -243,7 +243,7 @@ public:
 #endif
 
 Q_SIGNALS:
-    void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QSet<int> &roles = QSet<int>());
+    void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles = QVector<int>());
     void headerDataChanged(Qt::Orientation orientation, int first, int last);
     void layoutChanged(const QList<QPersistentModelIndex> &parents = QList<QPersistentModelIndex>());
     void layoutAboutToBeChanged(const QList<QPersistentModelIndex> &parents = QList<QPersistentModelIndex>());