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- package com.vaadin.tests.components.composite;
-
- import java.util.Iterator;
-
- import com.vaadin.annotations.Widgetset;
- import com.vaadin.server.VaadinRequest;
- import com.vaadin.tests.components.AbstractTestUIWithLog;
- import com.vaadin.ui.Button;
- import com.vaadin.ui.Component;
- import com.vaadin.ui.Composite;
- import com.vaadin.ui.HasComponents;
- import com.vaadin.ui.HorizontalLayout;
- import com.vaadin.ui.Label;
- import com.vaadin.ui.VerticalLayout;
-
- @Widgetset("com.vaadin.DefaultWidgetSet")
- public class CompositeChainUI extends AbstractTestUIWithLog {
-
- private Label innermostComponent;
- private Composite innerComposite;
- private Composite outerComposite;
- private VerticalLayout container;
- private HorizontalLayout layout;
-
- @Override
- protected void setup(VaadinRequest request) {
-
- createComposite();
- layout = new HorizontalLayout(outerComposite);
- container = new VerticalLayout(layout);
- addComponent(container);
-
- Button updateCaption = new Button("Update caption");
- updateCaption.addClickListener(event -> innermostComponent
- .setCaption(innermostComponent.getCaption() + " - updated"));
- addComponent(updateCaption);
- Button replaceWithAnotherComposite = new Button(
- "Replace with another Composite", event -> {
- Composite oldOuter = outerComposite;
- createComposite();
- layout.replaceComponent(oldOuter, outerComposite);
- });
- addComponent(replaceWithAnotherComposite);
- logHierarchy();
- }
-
- private void createComposite() {
- innermostComponent = new Label("Label text");
- innermostComponent.setCaption("Label caption");
- innermostComponent.setId("innermost");
-
- innerComposite = new Composite(innermostComponent);
- outerComposite = new Composite(innerComposite);
- }
-
- private void logHierarchy() {
- String msg = "Hierarchy: ";
- if (container != null) {
- msg += getHierarchy(container);
- }
- log(msg);
- }
-
- private static String getHierarchy(Component component) {
- String msg = component.getClass().getSimpleName();
- if (component instanceof HasComponents) {
-
- Iterator<Component> it = ((HasComponents) component).iterator();
- if (it.hasNext()) {
- Component content = it.next();
- if (content != null) {
- msg += " -> " + getHierarchy(content);
- }
- }
- }
- return msg;
- }
-
- }
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