button3.setWidth("50%");
button3.addClickHandler(new ClickHandler() {
// Delete the image in screen space:
public void onClick(ClickEvent event) {
map.render(screenImage, RenderGroup.SCREEN, RenderStatus.DELETE);
}
});
buttonLayout2.addMember(button3);
IButton button4 = new IButton(I18nProvider.getSampleMessages().screenWorldBTNWorldDelete());