Added QAbstractItemModelPrivate::canConvertToDouble().

And changed QTreeWidgetItem::operator<() and
QTableWidgetItem::operator<() to use it

Merge-request: 631
Reviewed-by: Olivier Goffart <ogoffart@trolltech.com>

2 files changed, 18 insertions, 0 deletions

diff --git a/src/corelib/kernel/qabstractitemmodel.cpp b/src/corelib/kernel/qabstractitemmodel.cpp
index 935c0aa..0a84ddb 100644
--- a/src/corelib/kernel/qabstractitemmodel.cpp
+++ b/src/corelib/kernel/qabstractitemmodel.cpp
@@ -467,6 +467,23 @@ QAbstractItemModel *QAbstractItemModelPrivate::staticEmptyModel()
     return qEmptyModel();
 }
 
+bool QAbstractItemModelPrivate::canConvertToDouble(const QVariant &value)
+{
+    switch (value.type()) {
+        case QVariant::Bool:
+        case QVariant::Int:
+        case QVariant::UInt:
+        case QVariant::LongLong:
+        case QVariant::ULongLong:
+        case QVariant::Double:
+        case QVariant::Char:
+            return true;
+        default:
+            return false;
+    }
+    return false;
+}
+
 void QAbstractItemModelPrivate::removePersistentIndexData(QPersistentModelIndexData *data)
 {
     if (data->index.isValid()) {
diff --git a/src/corelib/kernel/qabstractitemmodel_p.h b/src/corelib/kernel/qabstractitemmodel_p.h
index 27f1b28..70c35cb 100644
--- a/src/corelib/kernel/qabstractitemmodel_p.h
+++ b/src/corelib/kernel/qabstractitemmodel_p.h
@@ -89,6 +89,7 @@ public:
     void columnsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
     void columnsRemoved(const QModelIndex &parent, int first, int last);
     static QAbstractItemModel *staticEmptyModel();
+    static bool canConvertToDouble(const QVariant &value);
 
     inline QModelIndex createIndex(int row, int column, void *data = 0) const {
         return q_func()->createIndex(row, column, data);