uitest/src/com/vaadin/tests/tickets/Ticket2365.java


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package com.vaadin.tests.tickets;

import com.vaadin.server.LegacyApplication;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.LegacyWindow;
import com.vaadin.ui.Panel;
import com.vaadin.ui.VerticalLayout;

public class Ticket2365 extends LegacyApplication {

    @Override
    public void init() {

        final LegacyWindow mainWin = new LegacyWindow(getClass()
                .getSimpleName());
        setMainWindow(mainWin);

        VerticalLayout lo = new VerticalLayout();
        lo.setSizeFull();
        mainWin.setContent(lo);

        final Panel p = createMultilevelPanel(5, (Panel) null);

        Button b = new Button("Toggle parent level size");
        lo.addComponent(b);
        b.addListener(new Button.ClickListener() {
            @Override
            public void buttonClick(ClickEvent event) {
                if (p.getWidth() > 0) {
                    p.setSizeUndefined();
                } else {
                    p.setSizeFull();
                }
            }
        });

        lo.addComponent(p);

        lo.setExpandRatio(p, 1);

    }

    private Panel createMultilevelPanel(int i, Panel panel) {
        if (panel == null) {
            VerticalLayout panelLayout = new VerticalLayout();
            panelLayout.setMargin(true);
            panel = new Panel("Panel level " + i, panelLayout);
            panel.setSizeFull();
            panelLayout.setSizeFull();
        }
        VerticalLayout pl = new VerticalLayout();
        pl.setMargin(true);
        pl.setSizeFull();
        Panel p = new Panel("Panel level " + i--, pl);
        p.setSizeFull();
        pl.addComponent(p);
        if (i > 0) {
            createMultilevelPanel(i, p);
        }
        return panel;
    }

}