/// <summary>
/// Provides all of the known points the device hit since the last reported position update.
/// </summary>
/// <param name="relativeTo">Defines the coordinate space.</param>
/// <returns>A list of points in the coordinate space of relativeTo.</returns>
public override TouchPointCollection GetIntermediateTouchPoints(IInputElement relativeTo)
{
// Retrieve the stylus points
StylusPointCollection stylusPoints = StylusDevice.GetStylusPoints(relativeTo, _stylusPointDescription);
int count = stylusPoints.Count;
TouchPointCollection touchPoints = new TouchPointCollection();
GeneralTransform elementToRoot;
GeneralTransform rootToElement;
GetRootTransforms(relativeTo, out elementToRoot, out rootToElement);
// Convert the stylus points into touch points
for (int i = 0; i < count; i++)
{
StylusPoint stylusPoint = stylusPoints[i];
Point position = new Point(stylusPoint.X, stylusPoint.Y);
Rect rectBounds = GetBounds(stylusPoint, position, relativeTo, elementToRoot, rootToElement);
TouchPoint touchPoint = new TouchPoint(this, position, rectBounds, _lastAction);
touchPoints.Add(touchPoint);
}
return(touchPoints);
}
internal static TouchPointCollection GetTouchPoints(IInputElement relativeTo)
{
TouchPointCollection points = new TouchPointCollection();
if (_activeDevices != null)
{
int count = _activeDevices.Count;
for (int i = 0; i < count; i++)
{
TouchDevice device = _activeDevices[i];
points.Add(device.GetTouchPoint(relativeTo));
}
}
return(points);
}
