uitest/src/main/java/com/vaadin/tests/push/PushToggleComponentVisibility.java


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package com.vaadin.tests.push;

import com.vaadin.annotations.Push;
import com.vaadin.annotations.Widgetset;
import com.vaadin.server.VaadinRequest;
import com.vaadin.ui.Button;
import com.vaadin.ui.Label;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;

@Push
@Widgetset("com.vaadin.DefaultWidgetSet")
public class PushToggleComponentVisibility extends UI {

    @Override
    protected void init(VaadinRequest request) {
        VerticalLayout mainLayout = new VerticalLayout();
        setContent(mainLayout);

        Label label = new Label("Please wait");
        label.setId("label");
        label.setVisible(false);
        mainLayout.addComponent(label);

        Button button = new Button("Hide me for 3 seconds");
        button.setId("hide");
        button.addClickListener(event1 -> {
            button.setVisible(false);
            label.setVisible(true);

            new Thread(() -> {
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                button.getUI().access(() -> {
                    button.setVisible(true);
                    label.setVisible(false);
                    button.getUI().push();
                });
            }).start();
        });
        mainLayout.addComponent(button);
    }

}