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>
/// Initialize the behavior
/// </summary>
protected override void OnAttached()
{
base.OnAttached();
this.manipulationProcessor = new ManipulationProcessor2D(SupportedManipulations);
this.manipulationProcessor.Started += OnManipulationStarted;
this.manipulationProcessor.Delta += OnManipulationDelta;
this.manipulationProcessor.Completed += OnManipulationCompleted;
this.inertiaProcessor = new InertiaProcessor2D();
this.inertiaProcessor.TranslationBehavior.DesiredDeceleration = Deceleration;
this.inertiaProcessor.RotationBehavior.DesiredDeceleration = AngularDeceleration;
this.inertiaProcessor.ExpansionBehavior.DesiredDeceleration = ExpansionDeceleration;
this.inertiaProcessor.Delta += OnManipulationDelta;
this.inertiaProcessor.Completed += OnInertiaCompleted;
this.inertiaTimer = new DispatcherTimer();
this.inertiaTimer.Interval = TimeSpan.FromMilliseconds(30);
this.inertiaTimer.Tick += OnTimerTick;
this.AssociatedObject.RenderTransformOrigin = new Point(0.5, 0.5);
Move(new Point(0, 0), 0, 100);
IsPivotActive = true;
this.AssociatedObject.MouseLeftButtonUp += OnMouseUp;
this.AssociatedObject.MouseLeftButtonDown += OnMouseDown;
this.AssociatedObject.MouseMove += OnMouseMove;
this.AssociatedObject.LostMouseCapture += OnLostMouseCapture;
TouchHelper.AddHandlers(this.AssociatedObject, new TouchHandlers
{
TouchDown = OnTouchDown,
CapturedTouchReported = OnCapturedTouchReported,
});
TouchHelper.EnableInput(true);
this.AssociatedObject.Loaded += (s1, e1) =>
{
TouchHelper.SetRootElement(TouchHelper.GetRootElement(this.AssociatedObject));
};
}
/// <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);
}
/// <summary>
/// Initialize the TouchHelper
/// </summary>
void AssociatedObjectLoaded(object sender, RoutedEventArgs e)
{
TouchHelper.SetRootElement(TouchHelper.GetRootElement(AssociatedObject));
}