NavigationHelper.java :  » XML-UI » XUI » net » xoetrope » builder » Java Open Source

package net.xoetrope.builder;

import net.xoetrope.xui.XPage;
import net.xoetrope.xui.XPageManager;
import net.xoetrope.xui.XProjectManager;

/**
 * NavigationHelper extends XPage by adding a few simple methods to assist in
 * navigating from page to page. The previous and next methods assume that
 * the names of the next and previous pages have been added as attributes
 * to the page.
 * <p>Copyright: Copyright (c) Xoetrope Ltd., 2002-2003</p>
 * License: see license.txt
 */
public class NavigationHelper extends XPage
{
  protected XPageManager pageManager;

  public NavigationHelper()
  {
    pageManager = XProjectManager.getPageManager();
  }

  /**
   * Navigate to the page referenced by the 'home' attribute
   */
  public void homePage()
  {
    if ( wasMouseClicked() )
      navigateToPage( "home" );
  }

  /**
   * Navigate to the previous page in the page display history
   */
  public void prevPage()
  {
    if ( wasMouseClicked() )
      XProjectManager.getPageManager().showPrevious();
  }

  /**
   * Navigate to the page referenced by the 'next' attribute
   */
  public void nextPage()
  {
    if ( wasMouseClicked() )
      navigateToPage( "next" );
  }

  /**
   * Lookup the key/attribute and navigate to that page.
   */
  protected void navigateToPage( String key )
  {
    String dest = (String)getAttribute( key );
    if ( dest != null )
      XProjectManager.getPageManager().showPage( dest );
  }
}