public class SplitLayoutPanelExample implements EntryPoint {
public void onModuleLoad() {
// Create a three-pane layout with splitters.
SplitLayoutPanel p = new SplitLayoutPanel();
p.addWest(new HTML("navigation"), 128);
p.addNorth(new HTML("list"), 384);
p.add(new HTML("details"));
// Attach the LayoutPanel to the RootLayoutPanel. The latter will listen for
// resize events on the window to ensure that its children are informed of
// possible size changes.
RootLayoutPanel rp = RootLayoutPanel.get();