class UppApp : public WithUppAppLayout<TopWindow>
{

	public:
		typedef UppApp CLASSNAME;
		UppApp();

		void displayMessage ( String s );

	private:
		DrawCanvas canvas;
		WithButtonLayout<ParentCtrl> buttonPanel;
		Splitter splitter;  // <-------------------------
};


UppApp::UppApp()
{
	CtrlLayout ( *this, "UppApp" );
	
	CtrlLayout ( buttonPanel );

	buttonPanel.aBtn << THISBACK1 ( displayMessage, "A" );
	buttonPanel.bBtn << THISBACK1 ( displayMessage, "B" );
	buttonPanel.cBtn << THISBACK1 ( displayMessage, "C" );

	Add(splitter);  // <-------------------------
	splitter.Horz(buttonPanel,canvas); // <-------------------------
	BackPaint();
}