demos.add(new ButtonSamples(demo));
demos.add(new DatepickerSamples(demo));
demos.add(new DialogSamples(demo));
demos.add(new ProgressbarSamples(demo));
demos.add(new SliderSamples(demo));
demos.add(new TabsSamples(demo));
demos.add(new PositionSamples(demo));
LayoutPanel layout = RootLayoutPanel.get();
layout.add(app);
layout.setWidgetLeftRight(app, 15, Unit.PCT, 15, Unit.PCT);