Implemented SmTreeModel::parent

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

2 files changed, 16 insertions, 1 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;
diff --git a/smtreemodel.h b/smtreemodel.h
index 46f852f..698a2ce 100644
--- a/smtreemodel.h
+++ b/smtreemodel.h
@@ -23,8 +23,9 @@ class SmTreeModel : public QAbstractItemModel {
 		int rowCount(const QModelIndex &parent) const;
 		int columnCount(const QModelIndex &parent) const;
 
-		// index and flags
+		// index, parent and flags
 		QModelIndex index(int row, int column, const QModelIndex &parent) const;
+		QModelIndex parent(const QModelIndex &child) const;
 		Qt::ItemFlags flags(const QModelIndex &index) const;
 
 		// headers + data