void listener_Flick(object sender, FlickGestureEventArgs e)
{
//Debug.WriteLine("listener_Flick");
if (e.Direction == Orientation.Vertical)
{
_state = State.Flicking;
_selectedItem = null;
if (!IsExpanded)
{
IsExpanded = true;
}
Point velocity = new Point(0, e.VerticalVelocity);
double flickDuration = PhysicsConstants.GetStopTime(velocity);
Point flickEndPoint = PhysicsConstants.GetStopPoint(velocity);
IEasingFunction flickEase = PhysicsConstants.GetEasingFunction(flickDuration);
AnimatePanel(new Duration(TimeSpan.FromSeconds(flickDuration)), flickEase, _panningTransform.Y + flickEndPoint.Y);
e.Handled = true;
_selectedItem = null;
UpdateItemState();
}
}
private void OnManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
{
if (_isDragging)
{
// See if it was a flick
if (e.IsInertial)
{
_state = State.Flicking;
_selectedItem = null;
if (!IsExpanded)
{
IsExpanded = true;
}
Point velocity;
if (Orientation == Orientation.Vertical)
{
velocity = new Point(0, e.FinalVelocities.LinearVelocity.Y);
}
else
{
velocity = new Point(e.FinalVelocities.LinearVelocity.X, 0);
}
double flickDuration = PhysicsConstants.GetStopTime(velocity, Friction, MaximumSpeed, ParkingSpeed);
Point flickEndPoint = PhysicsConstants.GetStopPoint(velocity, Friction, MaximumSpeed, ParkingSpeed);
IEasingFunction flickEase = PhysicsConstants.GetEasingFunction(flickDuration, Friction);
double to;
if (Orientation == Orientation.Vertical)
{
to = _panningTransform.Y + flickEndPoint.Y;
}
else
{
to = _panningTransform.X + flickEndPoint.X;
}
AnimatePanel(new Duration(TimeSpan.FromSeconds(flickDuration)), flickEase, to);
e.Handled = true;
_selectedItem = null;
UpdateItemState();
}
if (_state == State.Dragging)
{
SelectAndSnapToClosest();
}
_state = State.Expanded;
}
}
private void OnManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
{
if (_isDragging)
{
// See if it was a flick
if (e.IsInertial)
{
_state = State.Flicking;
_selectedItem = null;
if (!IsExpanded)
{
IsExpanded = true;
}
Point velocity = new Point(0, e.FinalVelocities.LinearVelocity.Y);
double flickDuration = PhysicsConstants.GetStopTime(velocity);
Point flickEndPoint = PhysicsConstants.GetStopPoint(velocity);
IEasingFunction flickEase = PhysicsConstants.GetEasingFunction(flickDuration);
double endPoint = _panningTransform.Y + flickEndPoint.Y;
double adjustedEndPoint = Math.Round(endPoint / ActualItemHeight) * ActualItemHeight;
flickDuration *= adjustedEndPoint / endPoint;
AnimatePanel(new Duration(TimeSpan.FromSeconds(flickDuration)), flickEase, adjustedEndPoint);
#if WP8
_changeStateAfterAnimation = false;
#endif
e.Handled = true;
_selectedItem = null;
UpdateItemState();
}
if (_state == State.Dragging)
{
SelectAndSnapToClosest();
}
_state = State.Expanded;
}
}