/**
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.webui.core;
import org.exoplatform.commons.utils.PageList;
import org.exoplatform.webui.application.WebuiRequestContext;
import org.exoplatform.webui.bean.UIDataFeed;
import org.exoplatform.webui.config.annotation.ComponentConfig;
import org.exoplatform.webui.config.annotation.EventConfig;
import org.exoplatform.webui.event.Event;
import org.exoplatform.webui.event.EventListener;
@ComponentConfig(template = "system:/groovy/webui/core/UIVirtualList.gtmpl", events = {@EventConfig(listeners = UIVirtualList.LoadNextActionListener.class)})
public class UIVirtualList extends UIComponentDecorator
{
private int pageSize = 1;
public int getPageSize()
{
return pageSize;
}
public void setPageSize(int pageSize)
{
this.pageSize = pageSize;
}
public String event(String name, String beanId) throws Exception
{
UIComponent parent = this.getParent();
return parent.event(name, beanId);
}
public void dataBind(PageList datasource) throws Exception
{
UIDataFeed dataFeed = this.getDataFeed();
datasource.setPageSize(this.getPageSize());
dataFeed.setDataSource(datasource);
}
public UIDataFeed getDataFeed()
{
try
{
return (UIDataFeed)this.uicomponent_;
}
catch (Exception e)
{
throw new NullPointerException("dataFeed doesn't attached");
}
}
static public class LoadNextActionListener extends EventListener<UIVirtualList>
{
public void execute(Event<UIVirtualList> event) throws Exception
{
UIVirtualList virtualList = event.getSource();
UIDataFeed dataFeed = virtualList.getDataFeed();
WebuiRequestContext rContext = event.getRequestContext();
dataFeed.feedNext();
if (!dataFeed.hasNext())
{
rContext.getJavascriptManager().addJavascript(
"eXo.webui.UIVirtualList.loadFinished('" + virtualList.getId() + "');");
}
rContext.getJavascriptManager().addJavascript(
"eXo.webui.UIVirtualList.updateList('" + virtualList.getId() + "');");
rContext.addUIComponentToUpdateByAjax((UIComponent)dataFeed);
}
}
}