private void MainPage_Loaded(object sender, RoutedEventArgs e)
{
// Hide the refresh indicator (SV1 is the outer ScrollViewer)
SV1.ChangeView(null, 100, null);
ScrollViewer childScrollView = GetChildElement <ScrollViewer>(lv);
if (childScrollView != null)
{
CompositionPropertySet scrollingProperties = ElementCompositionPreview.GetScrollViewerManipulationPropertySet(childScrollView);
Compositor comp = scrollingProperties.Compositor;
//
// Set up the animation on the content of the main scroller. Animation will show a peek
// of the refresh indicator when the child listview is bouncing.
//
MyPanel tempGrid = GetChildElement <MyPanel>(SV1);
Visual elementVisual = ElementCompositionPreview.GetElementVisual(tempGrid);
ExpressionAnimation elementAnimation = comp.CreateExpressionAnimation(@" max(scrollingProperties.Translation.Y, 0)");
elementAnimation.SetReferenceParameter("scrollingProperties", scrollingProperties);
elementVisual.StartAnimation("Offset.Y", elementAnimation);
//
// Setup the animation to negate the bounce on the listView's scroller
//
Visual childVisual = ElementCompositionPreview.GetElementVisual(childScrollView);
ExpressionAnimation childAnimation = comp.CreateExpressionAnimation(@" -max(scrollingProperties.Translation.Y, 0)");
childAnimation.SetReferenceParameter("scrollingProperties", scrollingProperties);
childVisual.StartAnimation("Offset.Y", childAnimation);
}
}
private void UpdateFeed()
{
for (int i = lastValue; i > lastValue - 10; i--)
{
feed.Insert(0, i);
}
lastValue = lastValue - 10;
if (lastValue < 0)
{
PopulateFeed();
}
SV1.ChangeView(null, 0, null, true);
VisualStateManager.GoToState(this, "PullToRefresh", false);
}
private void InnerCustomPanel_SizeChanged(object sender, SizeChangedEventArgs e)
{
SV1.ChangeView(null, 100.0, null, true);
}
private void MainPage_Loaded(object sender, RoutedEventArgs e)
{
// Hide the refresh indicator
SV1.ChangeView(null, 100, null);
}