Li Guoliang » focusManager http://liguoliang.com ActionScript Flex Java JEE PHP... Mon, 21 May 2012 17:04:30 +0000 en hourly 1 http://wordpress.org/?v=3.3.2 Flex: Datagrid派发ITEM_EDIT_BEGIN后因fm/focusManager为Null报错的解决方法 http://liguoliang.com/2010/flex-datagrid%e6%b4%be%e5%8f%91item_edit_begin%e5%90%8e%e5%9b%a0fmfocusmanager%e4%b8%banull%e6%8a%a5%e9%94%99%e7%9a%84%e8%a7%a3%e5%86%b3%e6%96%b9%e6%b3%95/ http://liguoliang.com/2010/flex-datagrid%e6%b4%be%e5%8f%91item_edit_begin%e5%90%8e%e5%9b%a0fmfocusmanager%e4%b8%banull%e6%8a%a5%e9%94%99%e7%9a%84%e8%a7%a3%e5%86%b3%e6%96%b9%e6%b3%95/#comments Fri, 15 Jan 2010 14:09:59 +0000 Guoliang http://liguoliang.com/2010/01/1110/ More...

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]]> 某DataGrid 监听Editor_BEGIN事件, 如果有数据未保存切换界面时, 会弹出Alert, 在弹出Alert之后, 确定切换界面时, DataGrid报错:
DataGrid的itemEditorItemEditBeginHandler方法中:
var fm:IFocusManager = focusManager; 该fm也就是focusManager为Null, 导致出现错误.
恰好focusManager属性为Protected.
解决方法, 在DataGridGrade(该类继承了DataGrid)的onEditBegin方法中增加了 
if(focusManager == null) {
	e.preventDefault()
	return;
}

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