在 flex 中，有没有办法在 DataGrid 中捕获并可选地取消行选择事件? [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，但我似乎无法找到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的选择不变.

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，但它应该可以在 GridSelectionEvent.SELECTION_CHANGING 事件上使用 event.preventDefault() 和/或 event.stopImmediatePropagation() 工作.

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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