public InteractionInfo GetInteractionInfoAtLocation(int skeletonTrackingId, InteractionHandType handType, double x, double y)
{
var interactionInfo = new InteractionInfo
{
IsPressTarget = false,
IsGripTarget = false,
};
var hitTestPosition = InteractionZoneDefinition.InteractionZoneToElement(x, y, this.InteractionRootElement);
Func <HandPointer, bool> isTargetCapturedElement =
handPointer =>
(handPointer.TrackingId == skeletonTrackingId) &&
(handPointer.HandType == EnumHelper.ConvertHandType(handType)) &&
(handPointer.Captured != null);
var targetHandPointer = this.publicHandPointers.FirstOrDefault(isTargetCapturedElement);
var targetElement = targetHandPointer != null ? targetHandPointer.Captured : this.HitTest(hitTestPosition);
if (targetElement != null)
{
// Walk up the tree and try to find a grip target and/or a press target
for (DependencyObject search = targetElement;
search != null && search != this.InteractionRootElement &&
(!interactionInfo.IsGripTarget || !interactionInfo.IsPressTarget);
search = VisualTreeHelper.GetParent(search))
{
var searchElement = search as FrameworkElement;
if (searchElement == null)
{
// We need ActualWidth and Height which comes
// with FrameworkElement
continue;
}
if (!interactionInfo.IsPressTarget)
{
bool isPressTarget = KinectRegion.GetIsPressTarget(searchElement);
if (isPressTarget)
{
// We found a press target.
if (interactionInfo.PressTargetControlId == 0)
{
interactionInfo.PressTargetControlId = searchElement.GetHashCode();
}
interactionInfo.IsPressTarget = true;
// Apply the margin to the press target point
Point pressTargetPoint = ApplyControlPressPointMargin(KinectRegion.GetPressTargetPoint(searchElement));
// Convert from interaction zone space into actual control coordinates
var elementPressTargetPoint = InteractionZoneDefinition.InteractionZoneToElement(
pressTargetPoint.X, pressTargetPoint.Y, searchElement);
// Get it into the space of the KinectRegion
var regionPressTargetPoint = searchElement.TranslatePoint(elementPressTargetPoint, this.InteractionRootElement);
// Now put it into the interaction zone space but now relative to the KinectRegion
var interactionPressTargetPoint = InteractionZoneDefinition.ElementToInteractionZone(
regionPressTargetPoint.X, regionPressTargetPoint.Y, this.InteractionRootElement);
interactionInfo.PressAttractionPointX = interactionPressTargetPoint.X;
interactionInfo.PressAttractionPointY = interactionPressTargetPoint.Y;
}
}
if (!interactionInfo.IsGripTarget)
{
bool isGripTarget = KinectRegion.GetIsGripTarget(searchElement);
if (isGripTarget)
{
// We found a grip target.
interactionInfo.IsGripTarget = true;
}
}
}
}
return(interactionInfo);
}
