private void OnCapturedTouchReported(object sender, TouchReportedEventArgs e)
{
UIElement parent = this.AssociatedObject.Parent as UIElement;
if (parent == null)
{
return;
}
//Find the root element
UIElement root = TouchHelper.GetRootElement(parent);
if (root == null)
{
return;
}
// get transformation to convert positions to the parent's coordinate system
GeneralTransform transform = root.TransformToVisual(parent);
List <Manipulator2D> manipulators = null;
foreach (TouchPoint touchPoint in e.TouchPoints)
{
Point position = touchPoint.Position;
// convert to the parent's coordinate system
position = transform.Transform(position);
// create a manipulator
Manipulator2D manipulator = new Manipulator2D(
touchPoint.TouchDevice.Id,
(float)(position.X),
(float)(position.Y));
if (manipulators == null)
{
// lazy initialization
manipulators = new List <Manipulator2D>();
}
manipulators.Add(manipulator);
}
// process manipulations
this.manipulationProcessor.ProcessManipulators(
Timestamp,
manipulators);
}
/// <summary>
/// Occurs when Touch points are reported: handles manipulations
/// </summary>
private void OnCapturedTouchReported(object sender, TouchReportedEventArgs e)
{
var parent = AssociatedObject.Parent as UIElement;
if (parent == null)
{
return;
}
//Find the root element
var root = TouchHelper.GetRootElement(parent);
if (root == null)
{
return;
}
//Multi-Page support: verify if the collection of Touch points is null
var touchPoints = e.TouchPoints;
List <Manipulator2D> manipulators = null;
if (touchPoints.FirstOrDefault() != null)
{
// get transformation to convert positions to the parent's coordinate system
var transform = root.TransformToVisual(parent);
foreach (var touchPoint in touchPoints)
{
var position = touchPoint.Position;
// convert to the parent's coordinate system
position = transform.Transform(position);
// create a manipulator
var manipulator = new Manipulator2D(
touchPoint.TouchDevice.Id,
(float)(position.X),
(float)(position.Y));
if (manipulators == null)
{
// lazy initialization
manipulators = new List <Manipulator2D>();
}
manipulators.Add(manipulator);
//Change the visualization of the touchPoint
if (_touchPointsMarkers.ContainsKey(touchPoint.TouchDevice.Id))
{
if (AreFingersVisible)
{
_touchPointsMarkers[touchPoint.TouchDevice.Id].HorizontalOffset =
touchPoint.Position.X - (EllipseWidth / 2);
_touchPointsMarkers[touchPoint.TouchDevice.Id].VerticalOffset =
touchPoint.Position.Y - (EllipseWidth / 2);
}
#if DEBUG
Debug.WriteLine("TouchPoint Reported: Id {0} at ({1} - Total Touch Points: {2})",
touchPoint.TouchDevice.Id,
touchPoint.Position, touchPoints.Count());
#endif
}
}
}
// process manipulations
_manipulationProcessor.ProcessManipulators(Timestamp, manipulators);
}
