#include <QApplication>
#include <QMainWindow>
#include <QOpenGLWidget>
#include <QMenuBar>
#include <QToolBar>

class CGLView : public QOpenGLWidget
{
public:
	CGLView(QWidget* parent) : QOpenGLWidget(parent)
	{
	}

protected:
	void initializeGL()
	{
		glClearColor(1.f, 0.f, 0.5f, 1.f);
	}

	void paintGL()
	{
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
	}
};

class CMainWindow : public QMainWindow
{
public:
	CMainWindow()
	{
		QMenuBar* menu = menuBar();
		QMenu* fileMenu = new QMenu("File");
		menu->addAction(fileMenu->menuAction());

		QAction* quitAction = new QAction("Quit");
		fileMenu->addAction(quitAction);

		QToolBar* mainToolBar = new QToolBar(this);
		mainToolBar->addAction(quitAction);

		addToolBar(Qt::TopToolBarArea, mainToolBar);

		CGLView* glview = new CGLView(this);
		setCentralWidget(glview);
	}
};

int main(int argc, char* argv[])
{
	QApplication app(argc, argv);

	CMainWindow wnd;
	wnd.show();

	return app.exec();
}