/// <summary>
/// Tell the gestures to make the manipulation
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
void element_ManipulationDelta(object sender, System.Windows.Input.ManipulationDeltaEventArgs args)
{
if (this.Element == null)
{
args.Cancel();
return;
}
ApplyTransformForcedByGesture = null;
Transform transform = Utility.GetMatrixTransformFromTransform(this.ElementTransform);
//apply gestures
if (transform is MatrixTransform)
{
Matrix matrix = (transform as MatrixTransform).Matrix;
foreach (aGesture gest in Gestures)
{
if (gest.IsEnabled)
{
if (args.Handled)
{
break;
}
gest.Manipulate(args, ref matrix);
// refresh matrix if gesture forced it. exept if it is the the last gesture of the list.
if (ApplyTransformForcedByGesture == gest && Gestures.Last() != gest)
{
transform = Utility.GetMatrixTransformFromTransform(this.ElementTransform);
matrix = (transform as MatrixTransform).Matrix;
ApplyTransformForcedByGesture = null;
}
}
}
// do not apply it twice
if (ApplyTransformForcedByGesture == null)
{
ApplyTransform(matrix);
}
}
args.Handled = true;
}
