Find Sub Elements For Touch Targeting(Point, Rect) Method
Enables a UIElement subclass to expose child elements that assist with resolving touch targeting.
Equivalent WinUI method: Microsoft.UI.Xaml.UIElement.FindSubElementsForTouchTargeting.
protected: virtual IIterable<IIterable<Point> ^> ^ FindSubElementsForTouchTargeting(Point point, Rect boundingRect) = FindSubElementsForTouchTargeting;
IIterable<IIterable<Point>> FindSubElementsForTouchTargeting(Point point, Rect boundingRect);
protected virtual IEnumerable<IEnumerable<Point>> FindSubElementsForTouchTargeting(Point point, Rect boundingRect);
function findSubElementsForTouchTargeting(point, boundingRect)
Protected Overridable Function FindSubElementsForTouchTargeting (point As Point, boundingRect As Rect) As IEnumerable(Of IEnumerable(Of Point))
The point being touched.
The bounds used for touch tolerance.
A set of point sets. These represent the vertices of sub elements that are intersected by the given touch point (plus tolerance).
Points in the list are in descending z-order: topmost in the rendering stack appears first in the list.
FindElementsInHostCoordinates is a similar static-class helper method that is also used for hit testing and general object tree examination. However, FindSubElementsForTouchTargeting adds the refinement of a Rect input to use for touch tolerance.
If you are programming using C# or Microsoft Visual Basic, the return value type of this method is projected as an IEnumerable generic collection that contains UIElement items. If you are programming using Visual C++ component extensions (C++/CX), the return type of this method is IIterable<UIElement>.