public void onMouseDown(MouseDownEvent event) {
GWT.log(event.getX() + "", null);
contextMenu.setLeft(event.getX());
contextMenu.setTop(event.getY());
contextMenu.setVisibility(Visibility.VISIBLE);
contextMenu.draw();
}
});
checkbox.addRightButtonHandler(new RightMouseDownHandler() {
public void onRightMouseDown(RightMouseDownEvent event) {