动态设置dataGridColumn的ItemRenderer(Set the dataGridColumn's ItemRenderer dynamically)

我有这个DataGrid：

<mx:DataGrid id="myDataGrid"> <mx:columns> <mx:DataGridColumn dataField="colA" headerText="Column A:" width="40" headerRenderer="path.customComponents.VerticalHeader" itemRenderer="path.customComponents.CustomDataGridItemRenderer" /> </mx:Columns> </mx:DataGrid>

只有我不知道会有多少列。所以我尝试在ActionScript中使用函数构建列：

private var _columns:Array; [Bindable] public function set columns(value:Array):void { var c:Array = []; for each(var object:Object in value) { var column:DataGridColumn = new DataGridColumn(); column.headerText=object.name; column.width=40; // Setting the Renderers like this doesn't work! column.headerRenderer = path.customComponents.VerticalHeader; column.itemRenderer = path.customComponents.CustomDataGridItemRenderer; c.push(c); } myDataGrid.columns = c; } public function get columns():Array { return _columns; }

但出于某种原因，渲染不能像这样设置。（column.itemRenderer = com.ItemRenderer）。

什么是动态设置这些渲染的正确方法？

I have this DataGrid:

<mx:DataGrid id="myDataGrid"> <mx:columns> <mx:DataGridColumn dataField="colA" headerText="Column A:" width="40" headerRenderer="path.customComponents.VerticalHeader" itemRenderer="path.customComponents.CustomDataGridItemRenderer" /> </mx:Columns> </mx:DataGrid>

Only I don't know in advance how many columns there will be. So I tried building the columns with a function in ActionScript:

private var _columns:Array; [Bindable] public function set columns(value:Array):void { var c:Array = []; for each(var object:Object in value) { var column:DataGridColumn = new DataGridColumn(); column.headerText=object.name; column.width=40; // Setting the Renderers like this doesn't work! column.headerRenderer = path.customComponents.VerticalHeader; column.itemRenderer = path.customComponents.CustomDataGridItemRenderer; c.push(c); } myDataGrid.columns = c; } public function get columns():Array { return _columns; }

But for some reason, the renders cannot be set like this. (column.itemRenderer = com.ItemRenderer).

What is the proper way to set these renders dynamically?

最满意答案

itemRenderer和headerRenderer需要一个mx.core.IFactory作为它的值。在mxml中，您传递的字符串值会自动转换为mx.core.ClassFactory 。在ActionScript中，你必须自己做。

column.itemRenderer = new ClassFactory(path.customComponents.CustomDataGridItemRenderer);

itemRenderer and headerRenderer expects an mx.core.IFactory as its value. In mxml, the string value that you pass is automatically converted into mx.core.ClassFactory. In ActionScript, you have to do it yourself.

column.itemRenderer = new ClassFactory(path.customComponents.CustomDataGridItemRenderer);

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