How to determine when ScrollViewer started scrolling?

0
votes

I'm using a Windows Phone 8.1 project and have a ScrollViewer in my XAML.

Is there an event which will fire when the ScrollViewer start scrolling? Or anyway to trigger code when ScrollViewer start scrolling?

1
c#xamlwindows-phone-8.1scrollviewer
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1 Answers

0
votes

Try ViewChanging and ViewChanged events of ScrollViewer.

Note that these events will be called multiple times during a touch manipulation. You will need to rely on IsIntermediate (in ScrollViewerViewChangedEventArgs) or IsInertial (in ScrollViewerViewChangingEventArgs) to call your code accordingly.

Update

If you want to know when a touch happens immediately I'd give the ScrollViewer's direct child, for example, a StackPanel a transparent background and then subscribe to its PointerEntered event.