void radioListGropus_GroupViewClosing(object sender, GroupViewClosingEventArgs e)
{
e.Cancel = true;
SwivelTransition transition = new SwivelTransition();
ItemContainerGenerator itemContainerGenerator = e.ItemsControl.ItemContainerGenerator;
int animationFinished = 0;
int itemCount = e.ItemsControl.Items.Count;
for (int i = 0; i < itemCount; i++)
{
UIElement element = itemContainerGenerator.ContainerFromIndex(i) as UIElement;
ITransition animation = transition.GetTransition(element);
animation.Completed += delegate
{
// close the group view when all animations have completed
if ((++animationFinished) == itemCount)
{
radioListGropus.CloseGroupView();
radioListGropus.ScrollToGroup(e.SelectedGroup);
}
};
animation.Begin();
}
}
public static void GroupViewClose(this LongListSelector list, GroupViewClosingEventArgs e)
{
//Cancelling automatic closing and scrolling to do it manually.
e.Cancel = true;
if (e.SelectedGroup != null)
{
list.ScrollToGroup(e.SelectedGroup);
}
//Dispatch the swivel animation for performance on the UI thread.
Application.Current.RootVisual.Dispatcher.BeginInvoke(() =>
{
//Construct and begin a swivel animation to pop out the group view.
IEasingFunction quadraticEase = new QuadraticEase {
EasingMode = EasingMode.EaseOut
};
Storyboard _swivelHide = new Storyboard();
ItemsControl groupItems = e.ItemsControl;
foreach (var item in groupItems.Items)
{
UIElement container = groupItems.ItemContainerGenerator.ContainerFromItem(item) as UIElement;
if (container != null)
{
Border content = VisualTreeHelper.GetChild(container, 0) as Border;
if (content != null)
{
DoubleAnimationUsingKeyFrames showAnimation = new DoubleAnimationUsingKeyFrames();
EasingDoubleKeyFrame showKeyFrame1 = new EasingDoubleKeyFrame();
showKeyFrame1.KeyTime = TimeSpan.FromMilliseconds(0);
showKeyFrame1.Value = 0;
showKeyFrame1.EasingFunction = quadraticEase;
EasingDoubleKeyFrame showKeyFrame2 = new EasingDoubleKeyFrame();
showKeyFrame2.KeyTime = TimeSpan.FromMilliseconds(125);
showKeyFrame2.Value = 90;
showKeyFrame2.EasingFunction = quadraticEase;
showAnimation.KeyFrames.Add(showKeyFrame1);
showAnimation.KeyFrames.Add(showKeyFrame2);
Storyboard.SetTargetProperty(showAnimation, new PropertyPath(PlaneProjection.RotationXProperty));
Storyboard.SetTarget(showAnimation, content.Projection);
_swivelHide.Children.Add(showAnimation);
}
}
}
_swivelHide.Completed += delegate
{
list.CloseGroupView();
};
_swivelHide.Begin();
});
}
private void categoriesGroup_GroupViewClosing(object sender, GroupViewClosingEventArgs e)
{
groupViewOpened = false;
}
private void LongListSelector_GroupViewClosing(object sender, GroupViewClosingEventArgs e)
{
LongList.GroupViewClose(e);
}
private void countryList_GroupViewClosing(object sender, GroupViewClosingEventArgs e)
{
isGroupViewOpened = false;
}
