GridRenderAgentBuilder.java

/* GridRenderAgentBuilder.java

	Purpose:
		
	Description:
		
	History:
		2012/3/20 Created by dennis

Copyright (C) 2011 Potix Corporation. All Rights Reserved.
 */
package org.zkoss.zats.mimic.impl.operation;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;

import org.zkoss.zats.mimic.AgentException;
import org.zkoss.zats.mimic.ComponentAgent;
import org.zkoss.zats.mimic.impl.ClientCtrl;
import org.zkoss.zats.mimic.impl.EventDataManager;
import org.zkoss.zats.mimic.impl.OperationAgentBuilder;
import org.zkoss.zats.mimic.operation.RenderAgent;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.Events;
import org.zkoss.zul.Grid;
import org.zkoss.zul.Row;
import org.zkoss.zul.Rows;
import org.zkoss.zul.event.RenderEvent;
import org.zkoss.zul.impl.LoadStatus;
/**
 * 
 * @author dennis
 *
 */
public class GridRenderAgentBuilder implements OperationAgentBuilder<ComponentAgent,RenderAgent> {
	public RenderAgent getOperation(final ComponentAgent target) {
		if(!target.is(Grid.class)){
			throw new AgentException("target "+target+" cannot transfer to Grid");
		}
		return new RendererAgentImpl(target);
	}
	public Class<RenderAgent> getOperationClass() {
		return RenderAgent.class;
	}
	class RendererAgentImpl extends AgentDelegator<ComponentAgent> implements RenderAgent{
		public RendererAgentImpl(ComponentAgent target) {
			super(target);
		}

		@SuppressWarnings("unchecked")
		public void render(int x, int y) {
			Grid grid = target.as(Grid.class);
			Rows rows = grid.getRows();
			if(rows==null) return;
			
			List<Component> children = rows.getChildren();
			if(x==-1) x = 0;
			if(y==-1) y = rows.getChildren().size()-1;
			ArrayList<String> ids = new ArrayList<String>();
			while(true){
				if(x > y) break;
				Row r = (Row)children.get(x++);
				if(r!=null && !isLoaded(r)){//damn, isLoaded is not open in row
					ids.add(r.getUuid());
				}
			}
			if(ids.size()==0) return;
			
			String desktopId = target.getDesktop().getId();
			String cmd = Events.ON_RENDER;
			Map<String, Object> data = EventDataManager.getInstance().build(
					new RenderEvent(cmd, new HashSet<String>(ids)));
			((ClientCtrl) target.getClient()).postUpdate(desktopId, target.getUuid(), cmd, data, false);
			((ClientCtrl) getClient()).flush(desktopId);
		};
	}
	
	static boolean ignoreIsLoaded = false;
	
	private static boolean isLoaded(Row r){
		Object ctrl = r.getExtraCtrl();
		if(ctrl instanceof LoadStatus){
			return ((LoadStatus)ctrl).isLoaded();
		}
		return false;
	}
}