HitTestFilterBehavior 枚举

定义

public enum class HitTestFilterBehavior

public enum HitTestFilterBehavior

type HitTestFilterBehavior = 

Public Enum HitTestFilterBehavior

继承

Object

ValueType

Enum

HitTestFilterBehavior

字段

示例

以下示例演示如何从命中测试筛选器回调方法返回 HitTestFilterBehavior 值。 在这种情况下，筛选器会跳过标签及其后代，并点击测试其他所有内容。

// Filter the hit test values for each object in the enumeration.
public HitTestFilterBehavior MyHitTestFilter(DependencyObject o)
{
    // Test for the object value you want to filter.
    if (o.GetType() == typeof(Label))
    {
        // Visual object and descendants are NOT part of hit test results enumeration.
        return HitTestFilterBehavior.ContinueSkipSelfAndChildren;
    }
    else
    {
        // Visual object is part of hit test results enumeration.
        return HitTestFilterBehavior.Continue;
    }
}

' Filter the hit test values for each object in the enumeration.
Public Function MyHitTestFilter(ByVal o As DependencyObject) As HitTestFilterBehavior
    ' Test for the object value you want to filter.
    If o.GetType() Is GetType(Label) Then
        ' Visual object and descendants are NOT part of hit test results enumeration.
        Return HitTestFilterBehavior.ContinueSkipSelfAndChildren
    Else
        ' Visual object is part of hit test results enumeration.
        Return HitTestFilterBehavior.Continue
    End If
End Function

注解

命中测试筛选器回调的返回值是一个 HitTestFilterBehavior，用于确定在处理可视化树以进行测试时应采取哪种类型的操作。 例如，如果命中测试筛选器回调返回值 ContinueSkipSelfAndChildren，则可以从命中测试结果评估中删除当前视觉对象及其后代。