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package com.vaadin.tests;
import com.vaadin.ui.Button;
import com.vaadin.ui.Component;
import com.vaadin.ui.Label;
import com.vaadin.ui.LegacyWindow;
import com.vaadin.ui.Panel;
import com.vaadin.ui.VerticalLayout;
public class TestSetVisibleAndCaching
extends com.vaadin.server.LegacyApplication {
Panel panelA = new Panel("Panel A");
Panel panelB = new Panel("Panel B");
Panel panelC = new Panel("Panel C");
Button buttonNextPanel = new Button("Show next panel");
int selectedPanel = 0;
@Override
public void init() {
final LegacyWindow mainWindow = new LegacyWindow(
"TestSetVisibleAndCaching");
setMainWindow(mainWindow);
panelA.setContent(wrapInPanelLayout(
new Label("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA")));
panelB.setContent(wrapInPanelLayout(
new Label("BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB")));
panelC.setContent(wrapInPanelLayout(
new Label("CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC")));
mainWindow.addComponent(
new Label("Inspect transfered data from server to "
+ "client using firebug (http request / response cycles)."
+ " See how widgets are re-used,"
+ " after each panel is once shown in GUI then"
+ " their contents are not resend."));
mainWindow.addComponent(buttonNextPanel);
mainWindow.addComponent(panelA);
mainWindow.addComponent(panelB);
mainWindow.addComponent(panelC);
selectPanel(selectedPanel);
buttonNextPanel.addClickListener(event -> {
selectedPanel++;
if (selectedPanel > 2) {
selectedPanel = 0;
}
selectPanel(selectedPanel);
});
}
private VerticalLayout wrapInPanelLayout(Component component) {
VerticalLayout layout = new VerticalLayout();
layout.setMargin(true);
layout.addComponent(component);
return layout;
}
private void selectPanel(int selectedPanel) {
System.err.println("Selecting panel " + selectedPanel);
switch (selectedPanel) {
case 0:
panelA.setVisible(true);
panelB.setVisible(false);
panelC.setVisible(false);
break;
case 1:
panelA.setVisible(false);
panelB.setVisible(true);
panelC.setVisible(false);
break;
case 2:
panelA.setVisible(false);
panelB.setVisible(false);
panelC.setVisible(true);
break;
}
}
}
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