Dialog designer?

designer.cpp

class DesignerForm: public wxPanel {
	DECLARE_DYNAMIC_CLASS( DesignerForm )
	DECLARE_EVENT_TABLE()
	
	auto Designable(wxControl* instance) {
		auto handler = [this, instance]( wxMouseEvent& cursor ) {
			wxControl& control(*instance);
			wxPrintf ( "Mouse event. ID = %d\n", control.GetId());
		};
		
		instance->Bind(wxEVT_LEFT_DOWN, handler);
		instance->Bind(wxEVT_LEFT_UP, handler);
		
		/**
		 * For some reason, the supplied control 
		 * can't tell if it is being dragged. 
		 */
		instance->Bind(wxEVT_MOTION, handler);
		return instance;
	}
	
	void OnMouseEvent( wxMouseEvent& cursor ) {
		if (cursor.Dragging()) {
			puts( "Dragging event." );
		}
	}
	
protected:
	static wxColor background;
	wxControl *active;

public:
    bool Create( wxWindow* parent ) {	
	bool success = false;
	
	if (( success = wxPanel::Create( parent, wxID_ANY, wxPoint( 10, 10 ), wxSize( 100, 100 )))) {
		SetBackgroundColour(background);
		Designable(new wxButton( this, wxID_ANY ));
	}
	
	return success;
    }
};

IMPLEMENT_CLASS( DesignerForm, wxPanel )

/*
 * Designer event table definition
 */
BEGIN_EVENT_TABLE( DesignerForm, wxPanel )
	EVT_MOUSE_EVENTS( DesignerForm::OnMouseEvent )
END_EVENT_TABLE()