Improve the remove of an item in the new panel. No need to reload the collection, use QAbstractItemModel::removeRows instead.

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@4285 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/ElementsCollection/elementscollectionmodel.cpp

@@ -131,6 +131,31 @@ QVariant ElementsCollectionModel::data(const QModelIndex &index, int role) const
 	return item->data(index.column(), role);
 }
 
+/**
+ * @brief ElementsCollectionModel::removeRows
+ * Reimplemented from QAbstractItemModel
+ * @param row
+ * @param count
+ * @param parent
+ * @return true if rows was successfully removed
+ */
+bool ElementsCollectionModel::removeRows(int row, int count, const QModelIndex &parent)
+{
+	ElementCollectionItem *eci = nullptr;
+	if (!parent.isValid())
+		eci = m_root_item;
+	else
+		eci = static_cast<ElementCollectionItem *>(parent.internalPointer());
+
+	if (!(0 <= row+count && row+count <= eci->childCount())) return false;
+
+	beginRemoveRows(parent, row, (row + count -1));
+	bool r = eci->removeChild(row, count);
+	endRemoveRows();
+
+	return r;
+}
+
 /**
  * @brief ElementsCollectionModel::mimeData
  * @param indexes