private RecyclingElementFactory GetElementFactory()
{
var elementFactory = new RecyclingElementFactory();
elementFactory.RecyclePool = new RecyclePool();
elementFactory.Templates["Item"] = SharedHelpers.GetDataTemplate(@"<TextBlock Text='{Binding}' Height='100' />");
return(elementFactory);
}
private ItemsRepeater SetupRepeater(object dataSource, VirtualizingLayout layout, string itemContent, out ScrollViewer scrollViewer)
{
ItemsRepeater repeater = null;
ScrollViewer sv = null;
RunOnUIThread.Execute(() =>
{
var elementFactory = new RecyclingElementFactory();
elementFactory.RecyclePool = new RecyclePool();
elementFactory.Templates["Item"] = (DataTemplate)XamlReader.Parse(
@"<DataTemplate xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'> " + itemContent + @"</DataTemplate>");
repeater = new ItemsRepeater()
{
ItemsSource = dataSource,
ItemTemplate = elementFactory,
Layout = layout,
HorizontalCacheLength = 0.0,
VerticalCacheLength = 0.0
};
sv = new ScrollViewer
{
Content = repeater
};
Content = new ItemsRepeaterScrollHost()
{
Width = 200,
Height = 200,
ScrollViewer = sv
};
});
IdleSynchronizer.Wait();
scrollViewer = sv;
return(repeater);
}
public void ValidateElementAnimator()
{
ItemsRepeater repeater = null;
ElementAnimatorDerived animator = null;
var data = new ObservableCollection <string>(Enumerable.Range(0, 10).Select(i => string.Format("Item #{0}", i)));
var renderingEvent = new ManualResetEvent(false);
RunOnUIThread.Execute(() =>
{
var elementFactory = new RecyclingElementFactory();
elementFactory.RecyclePool = new RecyclePool();
elementFactory.Templates["Item"] = (DataTemplate)XamlReader.Parse(
@"<DataTemplate xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'>
<TextBlock Text='{Binding}' Height='50' />
</DataTemplate>");
CompositionTarget.Rendering += (sender, args) =>
{
renderingEvent.Set();
};
repeater = new ItemsRepeater()
{
ItemsSource = data,
ItemTemplate = elementFactory,
};
Content = new ItemsRepeaterScrollHost()
{
Width = 400,
Height = 800,
ScrollViewer = new ScrollViewer
{
Content = repeater
}
};
});
IdleSynchronizer.Wait();
Verify.IsTrue(renderingEvent.WaitOne(), "Waiting for rendering event");
List <CallInfo> showCalls = new List <CallInfo>();
List <CallInfo> hideCalls = new List <CallInfo>();
List <CallInfo> boundsChangeCalls = new List <CallInfo>();
RunOnUIThread.Execute(() =>
{
animator = new ElementAnimatorDerived()
{
HasShowAnimationValue = true,
HasHideAnimationValue = true,
HasBoundsChangeAnimationValue = true,
StartShowAnimationFunc = (UIElement element, AnimationContext context) =>
{
showCalls.Add(new CallInfo(repeater.GetElementIndex(element), context));
},
StartHideAnimationFunc = (UIElement element, AnimationContext context) =>
{
hideCalls.Add(new CallInfo(repeater.GetElementIndex(element), context));
},
StartBoundsChangeAnimationFunc = (UIElement element, AnimationContext context, Rect oldBounds, Rect newBounds) =>
{
boundsChangeCalls.Add(new CallInfo(repeater.GetElementIndex(element), context, oldBounds, newBounds));
}
};
repeater.Animator = animator;
renderingEvent.Reset();
data.Insert(0, "new item");
data.RemoveAt(2);
});
Verify.IsTrue(renderingEvent.WaitOne(), "Waiting for rendering event");
IdleSynchronizer.Wait();
Verify.AreEqual(1, showCalls.Count);
var call = showCalls[0];
Verify.AreEqual(0, call.Index);
Verify.AreEqual(AnimationContext.CollectionChangeAdd, call.Context);
Verify.AreEqual(1, hideCalls.Count);
call = hideCalls[0];
Verify.AreEqual(-1, call.Index); // not in the repeater anymore
Verify.AreEqual(AnimationContext.CollectionChangeRemove, call.Context);
Verify.AreEqual(1, boundsChangeCalls.Count);
call = boundsChangeCalls[0];
Verify.AreEqual(1, call.Index);
Verify.AreEqual(AnimationContext.CollectionChangeAdd | AnimationContext.CollectionChangeRemove, call.Context);
Verify.AreEqual(0, call.OldBounds.Y);
Verify.AreEqual(50, call.NewBounds.Y);
showCalls.Clear();
hideCalls.Clear();
boundsChangeCalls.Clear();
// Hookup just for show animations and validate.
RunOnUIThread.Execute(() =>
{
animator.HasShowAnimationValue = true;
animator.HasHideAnimationValue = false;
animator.HasBoundsChangeAnimationValue = false;
renderingEvent.Reset();
data.Insert(0, "new item");
data.RemoveAt(2);
});
Verify.IsTrue(renderingEvent.WaitOne(), "Waiting for rendering event");
IdleSynchronizer.Wait();
Verify.AreEqual(1, showCalls.Count);
call = showCalls[0];
Verify.AreEqual(0, call.Index);
Verify.AreEqual(AnimationContext.CollectionChangeAdd, call.Context);
Verify.AreEqual(0, hideCalls.Count);
Verify.AreEqual(0, boundsChangeCalls.Count);
}
