WPF在鼠标下获取元素

Question

WPF 有没有办法在 MouseMove 事件上获取鼠标下的元素数组？

Answer 1

来自“WPF Unleashed”，第 383 页:

Visual hit testing can inform youabout all Visuals that intersect alocation, [...] you must use [...] the[VisualTreeHelper.]HitTest method that accepts aHitTestResultCallback delegate. Beforethis version of HitTest returns, thedelegate is invoked once for eachrelevant Visual, starting from thetopmost and ending at the bottommost.

这种回调的签名是

HitTestResultBehavior Callback(HitTestResult result)

它必须返回 HitTestResultBehaviour.Continue接收更多点击，如下所示(来自 MSDN 上的链接页面):

// Return the result of the hit test to the callback.
public HitTestResultBehavior MyHitTestResult(HitTestResult result)
{
    // Add the hit test result to the list that will be processed after the enumeration.
    hitResultsList.Add(result.VisualHit);

    // Set the behavior to return visuals at all z-order levels.
    return HitTestResultBehavior.Continue;
}

如需更多信息，请咨询 MSDN documentation for VisualTreeHelper.HitTest .