/// <summary>
/// Pre-Select the object which user taps on.
/// </summary>
/// <param name="point"></param>
/// <param name="tappedStroke"></param>
/// <param name="tappedElement"></param>
private void TapSelectObject(Point point, out Stroke tappedStroke, out UIElement tappedElement)
{
tappedStroke = null;
tappedElement = null;
StrokeCollection hitTestStrokes = InkCanvas.Strokes.HitTest(point, 5.0d);
if (hitTestStrokes.Count > 0)
{
tappedStroke = hitTestStrokes[hitTestStrokes.Count - 1];
}
else
{
GeneralTransform transformToInnerCanvas = InkCanvas.TransformToVisual(InkCanvas.InnerCanvas);
Point pointOnInnerCanvas = transformToInnerCanvas.Transform(point);
// Try to find out whether we have a pre-select object.
tappedElement = InkCanvas.InnerCanvas.HitTestOnElements(pointOnInnerCanvas);
}
}
