Flex中实现double-click修改DataGrid
package
{
import flash.events.MouseEvent;
import mx.controls.DataGrid;
import mx.controls.dataGridClasses.DataGridColumn;
import mx.controls.listClasses.IDropInListItemRenderer;
import mx.controls.listClasses.IListItemRenderer;
import mx.core.EventPriority;
import mx.events.DataGridEvent;
/**
?* DataGrid that only allows editing if you double click
?*/
public class DoubleClickDataGrid extends DataGrid
{
????public function DoubleClickDataGrid()
????{
????????super();
????????doubleClickEnabled = true;
????}
????override protected function mouseDoubleClickHandler(event:MouseEvent):void
????{
????????var dataGridEvent:DataGridEvent;
????????var r:IListItemRenderer;
????????var dgColumn:DataGridColumn;
????????r = mouseEventToItemRenderer(event);
????????if (r && r != itemEditorInstance)
????????{
????????????var dilr:IDropInListItemRenderer = IDropInListItemRenderer(r);
????????????if (columns[dilr.listData.columnIndex].editable)
????????????{
????????????????dgColumn = columns[dilr.listData.columnIndex];
????????????????dataGridEvent = new DataGridEvent(DataGridEvent.ITEM_EDIT_BEGINNING, false, true);
????????????????// ITEM_EDIT events are cancelable
????????????????dataGridEvent.columnIndex = dilr.listData.columnIndex;
????????????????dataGridEvent.dataField = dgColumn.dataField;
????????????????dataGridEvent.rowIndex = dilr.listData.rowIndex + verticalScrollPosition;
????????????????dataGridEvent.itemRenderer = r;
????????????????dispatchEvent(dataGridEvent);
????????????}
????????}
????????super.mouseDoubleClickHandler(event);
????}
????override protected function mouseUpHandler(event:MouseEvent):void
????{
????????var r:IListItemRenderer;
????????var dgColumn:DataGridColumn;
????????r = mouseEventToItemRenderer(event);
????????if (r)
????????{
????????????var dilr:IDropInListItemRenderer = IDropInListItemRenderer(r);
????????????if (columns[dilr.listData.columnIndex].editable)
????????????{
????????????????dgColumn = columns[dilr.listData.columnIndex];
????????????????dgColumn.editable = false;
????????????}
????????}
????????super.mouseUpHandler(event);
????????if (dgColumn)
????????????dgColumn.editable = true;
????}
}
}
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" verticalGap="0" xmlns:local="*" height="500" >
????<mx:Script>
????<![CDATA[
????????private var arr:Array = [
????????????{ firstName: "Alex", lastName: "Harui" },
????????????{ firstName: "Gordon", lastName: "Smith" },
????????????{ firstName: "Deepa", lastName: "Subramanian" },
????????????{ firstName: "Matt", lastName: "Chotin" },
????????????{ firstName: "Ely", lastName: "Greenfield" },
????????????{ firstName: "Kevin", lastName: "Lynch" },
????????????{ firstName: "Shantanu", lastName: "Narayan" },
????????????{ firstName: "Joan", lastName: "Lafferty" },
????????????{ firstName: "Ryan", lastName: "Frishberg" },
????????????{ firstName: "Jason", lastName: "Szeto" },
????????????{ firstName: "Mark", lastName: "Anders" },
????????????{ firstName: "Peter", lastName: "Flynn" },
????????????{ firstName: "Heidi", lastName: "Williams" }
????????];
????]]>
????</mx:Script>
????<local:DoubleClickDataGrid id="dg" initialize="dg.dataProvider=arr" editable="true">
????????<local:columns>
????????????<mx:DataGridColumn dataField="firstName" headerText="First Name" />
????????????<mx:DataGridColumn dataField="lastName" headerText="Last Name" />
????????</local:columns>
????</local:DoubleClickDataGrid>
</mx:Application>
