public static IInputElement?InputHitTest(
this IInputElement element,
Point p,
Func <IVisual, bool> filter)
{
element = element ?? throw new ArgumentNullException(nameof(element));
filter = filter ?? throw new ArgumentNullException(nameof(filter));
return(element.GetVisualAt(p, x => s_hitTestDelegate(x) && filter(x)) as IInputElement);
}
/// <summary>
/// Returns the topmost active input element at a point on an <see cref="IInputElement"/>.
/// </summary>
/// <param name="element">The element to test.</param>
/// <param name="p">The point on <paramref name="element"/>.</param>
/// <returns>The topmost <see cref="IInputElement"/> at the specified position.</returns>
public static IInputElement InputHitTest(this IInputElement element, Point p)
{
Contract.Requires <ArgumentNullException>(element != null);
return(element.GetVisualAt(p, s_hitTestDelegate) as IInputElement);
}
public static IInputElement?InputHitTest(this IInputElement element, Point p)
{
element = element ?? throw new ArgumentNullException(nameof(element));
return(element.GetVisualAt(p, s_hitTestDelegate) as IInputElement);
}