});
grid.addControl(cancelButton);
Button continueButton = new Button("continue");
continueButton.onClicked(new Callback<ActionEvent>() {
public void call(ActionEvent actionEvent) throws Exception {
stage.hide();
final File file = File.createTempFile("foo", ".png");
file.deleteOnExit();
CanvasDocument doc = context.getDocument();
if(doc instanceof SketchDocument) {