VaadinHasComponentsInterface

MainPanelHasComponents.java

@Tag("main-panel-three")
@HtmlImport("src/main-panel-three.html")
@StyleSheet("styles.css")

@Route("three")
@Viewport("width=device-width, minimum-scale=1, initial-scale=1, user-scalable=yes")
@Theme(value = Lumo.class, variant = Lumo.DARK)
public class MainPanelHasComponents extends PolymerTemplate<MainPanelModel> implements RouterLayout, HasComponents {

    @Id("menu-three")
    private MenuThreeComponent menuThreeComponent;

    public MainPanelHasComponents() {
        add(menuThreeComponent);
    }

}

MainPanelThree.java

@Tag("main-panel-three")
@HtmlImport("src/main-panel-three.html")
@StyleSheet("styles.css")

@Route("three")
@Viewport("width=device-width, minimum-scale=1, initial-scale=1, user-scalable=yes")
@Theme(value = Lumo.class, variant = Lumo.DARK)
public class MainPanelThree extends PolymerTemplate<MainPanelModel> implements RouterLayout {

    @Id("menu-three")
    private MenuThreeComponent menuThreeComponent;

    public MainPanelThree() {
        getElement().appendChild(menuThreeComponent.getElement());
    }

}