began node work

panels/nodeeditor.cpp

@@ -0,0 +1,29 @@
+#include "nodeeditor.h"
+
+#include <QVBoxLayout>
+#include <QLabel>
+#include <QPushButton>
+
+NodeEditor::NodeEditor(QWidget *parent) :
+  Panel(parent),
+  view_(&scene_)
+{
+  resize(720, 480);
+
+  QWidget* central_widget = new QWidget();
+  setWidget(central_widget);
+
+  QVBoxLayout* layout = new QVBoxLayout(central_widget);
+  layout->addWidget(&view_);
+
+  view_.setInteractive(true);
+  view_.setDragMode(QGraphicsView::RubberBandDrag);
+
+  QPushButton* push_button = new QPushButton("heck!!!");
+  scene_.addWidget(push_button);
+}
+
+void NodeEditor::Retranslate()
+{
+
+}