MainContentPresenter.java

package org.ovirt.engine.ui.webadmin.section.main.presenter;

import com.google.gwt.event.shared.EventBus;
import com.google.gwt.event.shared.GwtEvent.Type;
import com.google.inject.Inject;
import com.gwtplatform.mvp.client.Presenter;
import com.gwtplatform.mvp.client.View;
import com.gwtplatform.mvp.client.annotations.ContentSlot;
import com.gwtplatform.mvp.client.annotations.ProxyCodeSplit;
import com.gwtplatform.mvp.client.proxy.Proxy;
import com.gwtplatform.mvp.client.proxy.RevealContentHandler;

public class MainContentPresenter extends Presenter<MainContentPresenter.ViewDef, MainContentPresenter.ProxyDef> {

    @ProxyCodeSplit
    public interface ProxyDef extends Proxy<MainContentPresenter> {
    }

    public interface ViewDef extends View {

        /**
         * Controls the sub tab panel visibility.
         */
        void setSubTabPanelVisible(boolean subTabPanelVisible);

    }

    @ContentSlot
    public static final Type<RevealContentHandler<?>> TYPE_SetMainTabPanelContent = new Type<>();

    @ContentSlot
    public static final Type<RevealContentHandler<?>> TYPE_SetSubTabPanelContent = new Type<>();

    @Inject
    public MainContentPresenter(EventBus eventBus, ViewDef view, ProxyDef proxy) {
        super(eventBus, view, proxy, MainSectionPresenter.TYPE_SetMainContent);
    }

    @Override
    protected void onBind() {
        super.onBind();
        registerHandler(getEventBus().addHandler(UpdateMainContentLayoutEvent.getType(),
                event -> {
                    boolean subTabPanelVisible = event.isSubTabPanelVisible();
                    getView().setSubTabPanelVisible(subTabPanelVisible);

                    if (!subTabPanelVisible) {
                        // Clear sub tab panel slot to ensure consistent sub tab presenter lifecycle
                        clearSlot(TYPE_SetSubTabPanelContent);
                    }
                }));
    }
}