Implemented SmTreeModel::parent

Forgot to implement SmTreeModel::parent. Thus it was a pure abstract
class and not instantiable.

1 files changed, 14 insertions, 0 deletions

diff --git a/smtreemodel.cpp b/smtreemodel.cpp
index 2c7a2d6..fe5482c 100644
--- a/smtreemodel.cpp
+++ b/smtreemodel.cpp
@@ -39,6 +39,20 @@ QModelIndex SmTreeModel::index(int row, int column, const QModelIndex &parent) c
 	return QModelIndex();
 }
 
+QModelIndex SmTreeModel::parent(const QModelIndex &child) const{
+	if(!child.isValid()){
+		return QModelIndex();
+	}
+
+	SmTreeItem *childItem = itemAt(child);
+	SmTreeItem *parentItem = childItem->parent();
+
+	if(parentItem == mRootItem){
+		return QModelIndex();
+	}
+	return createIndex(parentItem->row(), 0, parentItem);
+}
+
 Qt::ItemFlags SmTreeModel::flags(const QModelIndex &index) const{
 	if(!index.isValid()){
 		return 0;