这样，就可以在application初始化的时候，在外部对此Column进行设置：
ganttColumn.startDate = new Date(startTime);
ganttColumn.lastDate = new Date(lastTime);
ganttColumn.startDate = new Date(startTime);
ganttColumn.lastDate = new Date(lastTime);
在HeaderRenderer中，在setData方法中，可以获取相应的对象和参数
override public function set data(value:Object):void{
super.data = value;
var advancedDataGridColumn:GanttAdvancedDataGridColumn
= value as GanttAdvancedDataGridColumn;
if(advancedDataGridColumn!=null){
if(advancedDataGridColumn.startDate!=null){
startDate = advancedDataGridColumn.startDate;
lastDate = advancedDataGridColumn.lastDate;
render();
}
}
}
override public function set data(value:Object):void{
super.data = value;
var advancedDataGridColumn:GanttAdvancedDataGridColumn
= value as GanttAdvancedDataGridColumn;
if(advancedDataGridColumn!=null){
if(advancedDataGridColumn.startDate!=null){
startDate = advancedDataGridColumn.startDate;
lastDate = advancedDataGridColumn.lastDate;
render();
}
}
}
（3）利用labelFunction进行显示数据格式化
比如我想对日期数据进行格式化操作，如下所示：
private function date_labelFunc(item:Object, column:AdvancedDataGridColumn):String {
var dateFormatter:DateFormatter = new DateFormatter();
dateFormatter.formatString = "YYYY-MM-DD HH:NN";
var td:Date = new Date( new Number(item[column.dataField]) );
return dateFormatter.format( td );
}
private function date_labelFunc(item:Object, column:AdvancedDataGridColumn):String {
var dateFormatter:DateFormatter = new DateFormatter();
dateFormatter.formatString = "YYYY-MM-DD HH:NN";
var td:Date = new Date( new Number(item[column.dataField]) );
return dateFormatter.format( td );
}
在mx的datagridcolumn中，就可以引用这个label function
<mx:AdvancedDataGridColumn headerText="startTime" dataField="startTime" labelFunction="date_labelFunc" width="120"/>
<mx:AdvancedDataGridColumn headerText="startTime" dataField="startTime" labelFunction="date_labelFunc" width="120"/>
