b30-1826808.zul

ZK是一个Ajax Java Web框架

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B30-1826808.zul

{{IS_NOTE
	Purpose:
		
	Description:
		
	History:
		Thu Nov 22 09:18:06 TST 2007, Created by jumperchen
}}IS_NOTE

Copyright (C) 2007 Potix Corporation. All Rights Reserved.

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}}IS_RIGHT
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<window title="Slow Drag-and-Drop" border="normal">
Drag and drop with a large number of droppables using the same droppable
string seems to be really slow (Mozilla 1.7.12 on Solaris, Firefox 2.0 on
Solaris and MSIE 6.0 on Win2K).

Try Drag and Drop using this code on http://zkoss.org/zkdemo/userguide/
with 'itemCount = 25' and the app becomes busy, 'itemCount = 100' and the
browser stucks. With 'itemCount = 1000' there will no response anymore. 
	<listbox id="src" multiple="true" width="300px">
		<attribute name="onCreate">
			{ 
			int itemCount = 250; 
			for(int i = 0; i&lt;itemCount; i++){
				Listitem li = new Listitem("item "+i);
				li.setDraggable("true"); 
				li.setDroppable("true");
				li.addEventListener("onDrop", new EventListener() { 
					public	boolean isAsap() {
						return false;
					} 
					public void onEvent(Event event) throws UiException { 
					} 
				}); 
				li.setParent(self); 
			} 
			}
		</attribute>
	</listbox>
</window>