public void ScrollToCurrentOffset()
{
MainFlip.GetBindingExpression(FlipView.ItemsSourceProperty).UpdateSource();
var container = MainFlip.ContainerFromItem(this);
var scrollViewer = FindChildrenObjectByType <ScrollViewer>(container);
var store = new StoreToFiles();
var offset = store.LoadOffset(Thread);
scrollViewer.ScrollToVerticalOffset(offset);
this.MainFlip.SelectionChanged += MainFlip_SelectionChanged;
//scrollViewer.ViewChanged += ScrollViewer_ViewChanged;
}
private async void FlipViewOfSectionsItems_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (((FlipView)sender).SelectedItem == null)
{
return;
}
// http://stackoverflow.com/a/26611106/5303344
//HACKYFIX: Daniel note: Very hacky workaround for an api issue
//Microsoft's api for getting item controls for the flipview item fail on the very first media selection change for some reason. Basically we ignore the
//first media selection changed event but spawn a thread to redo the ignored selection changed, hopefully allowing time for whatever is going on
//with the api to get things sorted out so we can call the "ContainerFromItem" function and actually get the control we need
if (_hackyfix == 0 || _hackyfix == 1)
{
_hackyfix++;
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
FlipViewOfSectionsItems_SelectionChanged(sender, e);
});
return;
}
if (((FlipView)sender).SelectedItem.GetType().Name == "Item")
{
loadedItem = (Item)((FlipView)sender).SelectedItem;
FlipView flipView = (FlipView)sender;
FlipViewItem flipViewItemContainer = (FlipViewItem)flipView.ContainerFromItem(loadedItem);
if (flipViewItemContainer == null)
{
return;
}
if (loadedItem.item_type == "text")
{
WebView webview = VisualTreeHelpers.FindChild <WebView>(flipViewItemContainer, "ItemWebView");
webview.NavigateToString(loadedItem.item_text);
}
}
}
public void InitAnimation(InitOption Option)
{
if (compositor != null)
{
if (Option == InitOption.AroundImage)
{
for (int i = Flip.SelectedIndex > 2 ? Flip.SelectedIndex - 2 : 0; i < Flip.SelectedIndex + 2 && i < Flip.Items.Count; i++)
{
if (Flip.ContainerFromIndex(i) is UIElement Element)
{
var Visual = ElementCompositionPreview.GetElementVisual(Element);
CenterPointAnimation.SetReferenceParameter("visual", Visual);
Visual.StartAnimation("CenterPoint", CenterPointAnimation);
Visual.StopAnimation("Scale.X");
ScaleAnimation.SetReferenceParameter("visual", Visual);
Visual.StartAnimation("Scale.X", ScaleAnimation);
Visual.StartAnimation("Scale.Y", ScaleAnimation);
}
}
}
else
{
foreach (var Visual in from Item in Flip.Items
let Element = Flip.ContainerFromItem(Item) as UIElement
where Element != null
select ElementCompositionPreview.GetElementVisual(Element))
{
CenterPointAnimation.SetReferenceParameter("visual", Visual);
Visual.StartAnimation("CenterPoint", CenterPointAnimation);
Visual.StopAnimation("Scale.X");
ScaleAnimation.SetReferenceParameter("visual", Visual);
Visual.StartAnimation("Scale.X", ScaleAnimation);
Visual.StartAnimation("Scale.Y", ScaleAnimation);
}
}
}
}
