Based on the answer by @dominik I did some improvements, see my Gist. It contains some abstract base classes that can be used for any Modal/PopupView implementation. It's a bit more complex but also cleaner because we don't pass the whole Presenter to the View. The interface for the View to interact with the Presenter when the modal is closed is HasModalUnbind.
You would use these classes as follows. Example presenter:
public class ErrorModalPresenter extends ModalPopupPresenter<ErrorModalPresenter.MyView> {
public interface MyView extends ModalPopupView {
DivElement getErrorMessage();
}
private final ErrorEvent error;
@Inject
public ErrorModalPresenter(final EventBus eventBus,
final MyView view,
@Assisted final ErrorEvent error) {
super(eventBus, view);
this.error = error;
}
@Override
public void unbindModal() {
ErrorDismissEvent.fire(this, this);
}
@Override
protected void onBind() {
super.onBind();
//noinspection ThrowableResultOfMethodCallIgnored
getView().getErrorMessage().setInnerText(error.getCause().getMessage());
}
}
Example view:
public class ErrorModalView extends ModalPopupViewImpl implements ErrorModalPresenter.MyView {
@UiField(provided = true)
Modal errorModal;
@UiField
DivElement errorMessage;
interface Binder extends UiBinder<Widget, ErrorModalView> {}
@Inject
public ErrorModalView(final EventBus eventBus,
final Binder uiBinder) {
super(eventBus);
errorModal = initModal();
initWidget(uiBinder.createAndBindUi(this));
}
@Override
public DivElement getErrorMessage() {
return errorMessage;
}
}
And the UiBinder XML just for the record:
<ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder'
xmlns:g='urn:import:com.google.gwt.user.client.ui'
xmlns:b='urn:import:com.github.gwtbootstrap.client.ui'>
<b:Modal ui:field='errorModal' title='Error'>
<g:HTML>
<div ui:field='errorMessage'/>
</g:HTML>
<b:ModalFooter>
<b:Button text='Close' dismiss='MODAL'/>
</b:ModalFooter>
</b:Modal>
</ui:UiBinder>
In unbindModal() of ErrorModalPresenter I fire an event which is caught by the parent presenter of ErrorModalPresenter. There the modal presenter is removed from a container and then unbind() is called on the presenter. Of course any other solution is possible in unbindModal().
The base classes assume that modals are one-shot modals that will be removed once they're hidden. This behaviour can be changed in initModal() of ModalPopupViewImpl.
