internal void OnLeave(object sender, EventArgs ea)
{
if (ItemByWidth == 1)
return;
ListBoxItem li = sender as ListBoxItem;
if (li.IsSelected)
return;
FrameworkElement fel = VisualTreeHelper.GetChild(li, 0) as FrameworkElement;
while ((fel != null) && (fel.ContextMenu == null))
{
fel = VisualTreeHelper.GetChild(fel, 0) as FrameworkElement;
}
if (fel != null)
{
if (fel.ContextMenu.IsOpen)
{
fel.ContextMenuClosing += new ContextMenuEventHandler(fel_ContextMenuClosing);
return;
}
}
StopCurrentAnimation();
_EnterSB = Build(li, 0, TimeSpan.FromMilliseconds(500), TimeSpan.FromMilliseconds(500));
_EnterSB.Storyboard.Begin(this, true);
}
private void StopCurrentAnimation()
{
if (_EnterSB != null)
{
_EnterSB.Storyboard.Stop(this);
_EnterSB.Storyboard.Remove(this);
_EnterSB.Cancel();
_EnterSB = null;
}
}
internal void OnEnter(object sender, EventArgs ea)
{
if (ItemByWidth == 1)
return;
ListBoxItem li = sender as ListBoxItem;
if (li.IsSelected)
return;
StopCurrentAnimation();
_EnterSB = Build(li, Dist, TimeSpan.FromMilliseconds(150), TimeSpan.FromMilliseconds(300));
_EnterSB.Storyboard.Begin(this,true);
}
private StoryBoardControlable Build(ListBoxItem liss, double Distance, TimeSpan dur, TimeSpan ts)
{
Storyboard sb = new Storyboard();
ListBox lb = ListBoxOwner as ListBox;
int res = lb.ItemContainerGenerator.IndexFromContainer(liss);
List<Tuple<ListBoxItem, double>> tobe = new List<Tuple<ListBoxItem,double>>();
for (int i = _StartIndex; i < _StartIndex+InternalChildren.Count; i++)
{
ListBoxItem lis = lb.ItemContainerGenerator.ContainerFromIndex(i) as ListBoxItem;
if (lis == null)
continue;
double target = (i < res) ? Distance : 0;
DoubleAnimation db = new DoubleAnimation();
db.To = target;
db.Duration = dur;
db.BeginTime = FromOriginalAndDistance(ts,dur,res - i);
db.AccelerationRatio = 0.1;
db.DecelerationRatio = 0.1;
tobe.Add(new Tuple<ListBoxItem,double>(lis,target));
Storyboard.SetTarget(db, lis);
Storyboard.SetTargetProperty(db, new PropertyPath("RenderTransform.X"));
sb.Children.Add(db);
}
StoryBoardControlable resfinal = new StoryBoardControlable(sb);
EventHandler handler = null;
handler = delegate
{
resfinal.Storyboard.Completed -= handler;
resfinal.Storyboard.Remove(this);
if (!resfinal.IsCancelled)
{
if (object.ReferenceEquals(resfinal,resfinal.Storyboard))
_EnterSB = null;
tobe.Apply(li => SetTranslateLI(li.Item1, li.Item2));
}
};
sb.Completed += handler;
return resfinal;
}
