protected virtual void AddPointsToStroke(Contact contact)
{
Stroke stroke = (Stroke)contact.GetUserData(key);
if (stroke == null)
StartStroke(contact);
else
{
StylusPointCollection stylusPoints = stroke.StylusPoints;
if (stylusPoints != null)
{
Point position = contact.GetPosition(this);
stylusPoints.Add(new StylusPoint(position.X, position.Y, 0.5f));
}
}
}
protected virtual void EndStroke(Contact contact)
{
Stroke stroke = (Stroke)contact.GetUserData(key);
if (stroke != null)
{
InkCanvasStrokeCollectedEventArgs args = new InkCanvasStrokeCollectedEventArgs(stroke);
OnStrokeCollected(args);
}
}
private void RemovePartialStroke(Contact contact)
{
Stroke stroke = (Stroke) contact.GetUserData(key);
if(stroke != null)
{
inkCanvas.Strokes.Remove(stroke);
contact.SetUserData(key, null);
}
}