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WPF在鼠标下获取元素

2023-04-14 07:51:00

WPF Get Element(s) under mouse

WPF是否可以通过MouseMove事件在鼠标下获取元素数组？

您也可以尝试使用Mouse.DirectlyOver属性获取鼠标下方的最顶部元素。

从" WPF释放"，页383：

Visual hit testing can inform you
about all Visuals that intersect a
location, [...] you must use [...] the
[VisualTreeHelper.]HitTest method that accepts a
HitTestResultCallback delegate. Before
this version of HitTest returns, the
delegate is invoked once for each
relevant Visual, starting from the
topmost and ending at the bottommost.

这样的回调的签名是

1	HitTestResultBehavior Callback(HitTestResult result)

并且必须返回HitTestResultBehaviour.Continue才能接收进一步的匹配，如下所示(来自MSDN的链接页面)：

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// 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;
}

有关更多信息，请查阅VisualTreeHelper.HitTest的MSDN文档。

可以使用VisualTreeHelper.HitTest吗？

http://lukieb.blogspot.com/2008/07/visualtreehelperhittest.html

鼠标元素属性数组