/**
    * This file Copyright (c) 2011-2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.vaadin.gwt.client.magnoliashell.viewport.widget;
  
  import info.magnolia.ui.vaadin.gwt.client.magnoliashell.viewport.ShellAppsTransitionDelegate;
  
  import java.util.Iterator;
  
  import com.google.gwt.core.client.Scheduler;
  import com.google.gwt.dom.client.Style;
  import com.google.gwt.user.client.DOM;
  import com.google.gwt.user.client.Element;
  import com.google.gwt.user.client.Event;
  import com.google.gwt.user.client.ui.Widget;
  import com.googlecode.mgwt.dom.client.event.touch.TouchEndEvent;
  import com.googlecode.mgwt.dom.client.event.touch.TouchEndHandler;
  import com.googlecode.mgwt.ui.client.widget.touch.TouchDelegate;
  
  /**
   * Shell apps viewport client side.
   */
  public class ShellAppsViewportWidget extends ViewportWidget<ShellAppsTransitionDelegate> {
  
      private Listener listener;
  
      private boolean active;
  
      public void onShellAppsHidden() {
          listener.onShellAppsHidden();
      }
  
      /**
       * Listener interface for {@link ShellAppsViewportWidget}.
       */
      public interface Listener {
  
          void onShellAppLoaded(Widget shellAppWidget);
  
          void outerContentClicked();
  
          void onShellAppsHidden();
      }
  
      public ShellAppsViewportWidget(final Listener listener) {
          this.listener = listener;
          new TouchDelegate(this).addTouchEndHandler(new TouchEndHandler() {
              @Override
              public void onTouchEnd(TouchEndEvent event) {
                  final Element target = event.getNativeEvent().getEventTarget().cast();
                  if (target.isOrHasChild(getElement())) {
                      listener.outerContentClicked();
                  }
              }
          });
  
          /**
           * Make sure that initially the shell-app viewport is shifted out of view - so
           * that it slides down when AdminCentral is ready.
           */
          Scheduler.get().scheduleDeferred(new Scheduler.ScheduledCommand() {
              @Override
              public void execute() {
                  getElement().getStyle().setTop(-getOffsetHeight(), Style.Unit.PX);
              }
          });
  
          DOM.sinkEvents(getElement(), Event.TOUCHEVENTS | Event.MOUSEEVENTS);
      }
 
     public boolean isActive() {
         return active;
     }
 
     public void setActiveNoTransition(boolean isActive) {
         setVisible(isActive);
         this.active = isActive;
     }
 
     public void setActive(boolean active) {
         getTransitionDelegate().setActive(active);
         this.active = active;
     }
 
     public void onShellAppLoaded(Widget w) {
         Iterator<Widget> it = iterator();
         while (it.hasNext() && w != null) {
             Widget curW = it.next();
             curW.getElement().getStyle().setDisplay(w == curW ? Style.Display.BLOCK : Style.Display.NONE);
         }
         if (w != null) {
             listener.onShellAppLoaded(w);
         }
     }
 }