Page History

public class MyPage extends WebPage ...
    public CPageMyPage() {
        ...
        // 1 - page creation
        final Form form = new Form("form", model) {
            @Override
            protected void onSubmit() {
                // 2 - event handling (optional)
            }

            @Override
             protected void onBeforeRender() {
                // 3 - rendering
                super.onBeforeRender();
             }
        };
        add(form);
    }