Closes #9

core/tree_node.cpp

@@ -24,8 +24,11 @@ TreeNode::TreeNode(const SignalInfo &signal)
 }
 
 void TreeNode::AddChild(std::unique_ptr<TreeNode> child) {
-    if (child)
+    if (child) {
         m_children.push_back(std::move(child));
+        m_children.back()->m_parent = this;
+        m_children.back()->m_row = m_children.size() - 1U;
+    }
 }
 
 std::size_t TreeNode::GetChildCount() const {
@@ -61,3 +64,11 @@ const FrameInfo *TreeNode::GetFrame() const {
 const SignalInfo *TreeNode::GetSignal() const {
     return m_signal.get();
 }
+
+const TreeNode *TreeNode::GetParent() const {
+    return m_parent;
+}
+
+std::size_t TreeNode::GetRow() const {
+    return m_row;
+}