void Button_ManipulationDelta(object sender, System.Windows.Input.ManipulationDeltaEventArgs e)
{
e.Handled = true;
bool isInBounds = true;
Rect bounds = new Rect(new Point(0, 0), Button.RenderSize);
foreach (IManipulator manipulator in e.Manipulators)
{
Point p = manipulator.GetPosition(Button);
if (!bounds.Contains(p))
{
isInBounds = false;
break;
}
}
if (!isInBounds)
{
e.Cancel();
}
}
/// <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;
}
protected override void OnManipulationDelta(ManipulationDeltaEventArgs e)
{
if (_panningInfo != null)
{
if (e.IsInertial && CompleteScrollManipulation)
{
e.Complete();
}
else
{
bool cancelManipulation = false;
if (_panningInfo.IsPanning)
{
// Do the scrolling if we already started it.
ManipulateScroll(e);
}
else if (CanStartScrollManipulation(e.CumulativeManipulation.Translation, out cancelManipulation))
{
// Check if we can start the scrolling and do accordingly
_panningInfo.IsPanning = true;
ManipulateScroll(e);
}
else if (cancelManipulation)
{
e.Cancel();
_panningInfo = null;
}
}
e.Handled = true;
}
}