void control_ContactLeave(object sender, Microsoft.Surface.Presentation.ContactEventArgs e)
{
((ScatterViewItem)sender).SetRelativeZIndex(RelativeScatterViewZIndex.Bottommost);
}
/// <summary>
/// This handler is called when a Contact is first recognized.
/// </summary>
/// <param name="sender">the element raising the ContactDownEvent</param>
/// <param name="args">information about this ContactDownEvent</param>
private static void OnContactDown(object sender, ContactEventArgs args)
{
TimeSpan timeSinceLastContact = DateTime.Now.Subtract(lastContactAt);
SurfaceWindow sourceWindow = sender as SurfaceWindow;
// If we know it's a Contact, and not a finger or a tap
if ((timeSinceLastContact > TimeSpan.FromSeconds(10))
&& !args.Contact.IsFingerRecognized && !args.Contact.IsTagRecognized)
{
Rect emptyRect = new Rect(0, 0, 0, 0);
CaptureRawImageAsync(sourceWindow, emptyRect, null);
}
}