在Flex中，是否有一种方法可以捕获并有选择地取消DataGrid中的行选择事件? [英] In flex, is there a way to capture and optionally cancel a row selection event in a DataGrid?

问题描述

这应该是微不足道的，但是我似乎无法找出一种方法来做到这一点.

This should be trivial, but I can't seem to figure out a way to do this.

我有一个DataGrid，我想做的是，当用户单击一行以选择它时，检查某个条件，如果满足，则阻止该行被选中并保持旧选择不变.

I have a DataGrid, and what I would like to do, is when a user clicks on a row to select it, check a certain condition, and if it's met prevent the row from getting selected and keep the old selection intact.

谢谢！

推荐答案

我没有测试它，但是它应该在GridSelectionEvent.SELECTION_CHANGING事件上使用event.preventDefault()和/或event.stopImmediatePropagation()起作用./p>

I didn't test it, but it should work using event.preventDefault() and/or event.stopImmediatePropagation() on the GridSelectionEvent.SELECTION_CHANGING event.

//stupid function but used for example purpose
private function addListener():void
{
    dataGrid.addEventListener(GridSelectionEvent.SELECTION_CHANGING, onSelectionChanging)
}


private function onSelectionChanging(event:GridSelectionEvent):void
{
    if(!canRowBeSelected(event.selectionChange.rowIndex))
    {
       event.stopImmediatePropagation();
       event.preventDefault();
    }
}

private function canRowBeSelected(index:int):Boolean
{
    //add logic
    return false;
}

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