How to use

getPage

method

in

org.zkoss.zul.Window

if (view instanceof Window) {
   Window win = (Window) view;
   PageCtrl pc = (PageCtrl) win.getPage();
   pc.addBeforeHeadTags("<script type=\"text/javascript\">" + "(function(i,s,o,g,r,a,m)"
       + "{i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){"
       + "(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();" + "a=s.createElement(o),"
       + "m=s.getElementsByTagName(o)[0];" + "a.async=1;a.src=g;m.parentNode.insertBefore(a,m)" + "})"
       + "(window,document,'script','//www.google-analytics.com/analytics.js','ga');" + "ga('create', "
       + this.trackingID + ", 'auto'); " + "ga('send', 'pageview');" + "</script>");
 } else {
   throw new UiException("This view model must be applied from a Window component.");
 }

public void onPageDetached(Page page) {
  super.onPageDetached(page);
  if (_mode == MODAL && getPage() == null)
    leaveModal(OVERLAPPED);
}

/**
 * Displays the encounter selection dialog.
 *
 * @param flags The encounter flags.
 */
public static void execute(EncounterFlag... flags) {
  String resource = Constants.RESOURCE_PREFIX + "encounterSelection.zul";
  Window dlg = (Window) FrameworkUtil.getAttribute(resource);
  
  if (dlg == null || dlg.getPage() == null) {
    dlg = PopupDialog.popup(resource, true, true, false);
    FrameworkUtil.setAttribute(resource, dlg);
  }
  
  try {
    EncounterSelection sel = ZKUtil.findChild(dlg, EncounterSelection.class);
    sel.setEncounterFlags(EncounterFlag.flags(flags));
    dlg.doModal();
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

/**
 * Displays the encounter selection dialog.
 *
 * @param flags The encounter flags.
 */
public static void execute(EncounterFlag... flags) {
  try {
    Window dlg = (Window) FrameworkUtil.getAttribute(SELECTION_DIALOG);
    
    if (dlg == null || dlg.getPage() == null) {
      dlg = PopupDialog.popup(SELECTION_DIALOG, true, true, false);
      FrameworkUtil.setAttribute(SELECTION_DIALOG, dlg);
    }
    
    MainController sel = (MainController) getController(dlg);
    sel.setEncounterFlags(EncounterFlag.flags(flags));
    
    if (sel.needsInit) {
      sel.init();
    }
    
    dlg.doModal();
  } catch (Exception e) {
    FrameworkUtil.setAttribute(SELECTION_DIALOG, null);
    throw MiscUtil.toUnchecked(e);
  }
}