public override void OnApplyTemplate()
{
if (_button != null)
{
_button.Click -= OnClick;
}
base.OnApplyTemplate();
_root = MoreVisualTreeExtensions.FindFirstChildOfType <Grid>(this);
if (null == _root)
{
throw new NotSupportedException("Must include a Grid for manipulating.");
}
_button = GetTemplateChild("_button") as Button;
if (_button != null)
{
_button.Click += OnClick;
}
TransformAnimator.EnsureAnimator(_root, ref _ta);
OpacityAnimator.EnsureAnimator(_root, ref _oa);
if (_oa != null)
{
_root.Opacity = 0;
_oa.GoTo(1.0, new Duration(TimeSpan.FromSeconds(.5)));
}
}
/// <summary>
/// Ensures and creates if needed the animator for an element. Will also
/// verify that a translate transform is present.
/// </summary>
/// <param name="targetElement">The target element.</param>
/// <param name="animator">The animator reference.</param>
public static void EnsureAnimator(FrameworkElement targetElement, ref TransformAnimator animator)
{
if (animator == null)
{
TranslateTransform transform = TransformAnimator.GetTranslateTransform(targetElement);
if (transform != null)
{
animator = new TransformAnimator(transform);
}
}
if (animator == null)
{
throw new InvalidOperationException("The animation system could not be prepared for the target element.");
}
}
protected override void OnManipulationDelta(ManipulationDeltaEventArgs e)
{
TransformAnimator.EnsureAnimator(_root, ref _ta);
if (_ta != null)
{
_ta.GoTo(e.CumulativeManipulation.Translation.X, new Duration(TimeSpan.FromMilliseconds(20)));
}
// Ignore a click now.
if (_wasClicked && e.DeltaManipulation.Translation.X > 1)
{
_wasClicked = false;
}
base.OnManipulationDelta(e);
}
protected override void OnManipulationCompleted(ManipulationCompletedEventArgs e)
{
// Flick off-screen.
if (e.IsInertial && e.TotalManipulation.Translation.X > 0)
{
_wasClicked = false;
TransformAnimator.EnsureAnimator(_root, ref _ta);
if (_ta != null)
{
_ta.GoTo(ActualWidth + 1.0, new Duration(TimeSpan.FromSeconds(.5)), _ease, OnClosed);
}
else
{
OnClosed();
}
}
else if (e.TotalManipulation.Translation.X > 20)
{
// Resetting, so if they clicked, forget it.
if (_wasClicked && e.TotalManipulation.Translation.X > 20)
{
_wasClicked = false;
}
// Return and RESET the timer.
TransformAnimator.EnsureAnimator(_root, ref _ta);
ResetTimer(); // don't fire yet.
if (_ta != null)
{
_ta.GoTo(0.0, new Duration(TimeSpan.FromSeconds(.5)), _ease, ResetTimer); // reset once back.
}
}
else
{
// A click!
_wasClicked = true;
OnTick(this, EventArgs.Empty);
}
base.OnManipulationCompleted(e);
}
public void Restart()
{
bool wasValue = _imageOpened;
_imageOpened = false;
// clear out immediately
UpdateVisualStates(false);
_imageOpened = wasValue;
if (_imageOpened)
{
if (_ta == null)
{
TransformAnimator.EnsureAnimator(_image, ref _ta);
}
if (_ta != null)
{
_ta.Forever();
var frameWidth = _frame.ActualWidth;
var imageWidth = _image.ActualWidth;
var finalOffset = imageWidth - frameWidth;
if (finalOffset < 0)
{
// Threw an IOE in the past, someone hit this one
// according to some crash reports.
finalOffset = 0;
}
_ta.GoTo(-finalOffset, new Duration(TimeSpan.FromSeconds(50)));
}
}
UpdateVisualStates(true);
}
/// <summary>
/// Ensures and creates if needed the animator for an element. Will also
/// verify that a translate transform is present.
/// </summary>
/// <param name="targetElement">The target element.</param>
/// <param name="animator">The animator reference.</param>
public static void EnsureAnimator(FrameworkElement targetElement, ref TransformAnimator animator)
{
if (animator == null)
{
TranslateTransform transform = TransformAnimator.GetTranslateTransform(targetElement);
if (transform != null)
{
animator = new TransformAnimator(transform);
}
}
if (animator == null)
{
throw new InvalidOperationException("The animation system could not be prepared for the target element.");
}
}
