GWT ViewWithUiHandlers with DialogBox Uibinder - gwt

Question

I have been extending all my Views with ViewWithUiHandlers. So, from the View to invoke a presenter method I call
getUiHandlers().OnUserSelect();
How do i get the getUiHandlers() when one of view has to extend DialogBox, as a class can't have multiple extends.

Answer 1

Look at PopupViewWithUiHandler

Answer 2

Here's an example of a basic popup. First, you'll have to create a PresenterWidget associated to your PopupViewWithUiHandler:
public class MyPopupPresenter extends PresenterWidget<MyPopupPresenter.MyView>
implements MyPopupUiHandlers {
public interface MyView extends PopupView, HasUiHandlers<MyPopupUiHandlers> {
}
#Inject
public MyPopupPresenter(EventBus eventBus,
MyView view) {
super(eventBus, view);
getView().setUiHandlers(this);
}
}
Here's your PopupViewWithUiHandlers:
public class MyPopupView extends PopupViewWithUiHandlers<MyPopupUiHandlers>
implements MyPopupPresenter.MyView, {
public interface Binder extends UiBinder<PopupPanel, MyPopupView> {
}
#Inject
public MyPopupView(Binder binder,
EventBus eventBus) {
super(eventBus);
initWidget(binder.createAndBindUi(this));
}
}
And here's the UiBinder associated to your PopupViewWithUiHandlers. Notice the <g:PopupPanel>:
<ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder'
xmlns:g='urn:import:com.google.gwt.user.client.ui'>
<g:PopupPanel>
<g:HTMLPanel>
...
</g:HTMLPanel>
</g:PopupPanel>
</ui:UiBinder>
And, you can show the popup by calling addToPopupSlot(myPopupPresenter) in the parent Presenter:
public class MyPresenter extends Presenter<MyPresenter.MyView, MyPresenter.MyProxy> implements MyUiHandlers {
public interface MyView extends View, HasUiHandlers<MyUiHandlers> {
}
#ProxyStandard
#NameToken(NameTokens.myNameToken)
public interface MyProxy extends ProxyPlace<MyPresenter> {
}
private final MyPopupPresenter myPopupPresenter;
#Inject
public MyPresenter(EventBus eventBus,
MyView view,
MyProxy proxy,
MyPopupPresenter myPopupPresenter) {
super(eventBus, view, proxy, ApplicationPresenter.MainContentSlot);
this.myPopupPresenter = myPopupPresenter;
getView().setUiHandlers(this);
}
private void showPopup() {
addToPopupSlot(myPopupPresenter); // this will show your popup
}
}