nodeview/nodepanel: implemented select all/deselect all functionality

app/panel/node/node.cpp

@@ -44,6 +44,16 @@ void NodePanel::SetGraph(NodeGraph *graph)
   node_view_->SetGraph(graph);
 }
 
+void NodePanel::SelectAll()
+{
+  node_view_->SelectAll();
+}
+
+void NodePanel::DeselectAll()
+{
+  node_view_->DeselectAll();
+}
+
 void NodePanel::DeleteSelected()
 {
   node_view_->DeleteSelected();

app/panel/node/node.h

@@ -35,6 +35,9 @@ public:
 
   void SetGraph(NodeGraph* graph);
 
+  virtual void SelectAll() override;
+  virtual void DeselectAll() override;
+
   virtual void DeleteSelected() override;
 
 signals:

app/widget/nodeview/nodeview.cpp

@@ -153,6 +153,24 @@ void NodeView::DeleteSelected()
   Core::instance()->undo_stack()->push(new NodeRemoveCommand(graph_, selected_nodes));
 }
 
+void NodeView::SelectAll()
+{
+  QList<QGraphicsItem *> all_items = this->items();
+
+  foreach (QGraphicsItem* i, all_items) {
+    i->setSelected(true);
+  }
+}
+
+void NodeView::DeselectAll()
+{
+  QList<QGraphicsItem *> all_items = this->items();
+
+  foreach (QGraphicsItem* i, all_items) {
+    i->setSelected(false);
+  }
+}
+
 void NodeView::AddNode(Node* node)
 {
   NodeViewItem* item = new NodeViewItem();

app/widget/nodeview/nodeview.h

@@ -82,6 +82,9 @@ public:
    */
   void DeleteSelected();
 
+  void SelectAll();
+  void DeselectAll();
+
 signals:
   /**
    * @brief Signal emitted when the selected nodes have changed