private static void PerformAutoPan(object sender, RoutedPanEventArgs e)
{
var element = sender as FrameworkElement;
var scrollViewer = GetScrollViewer(element);
if (scrollViewer == null)
{
throw new InvalidOperationException("Could not resolve scroll viewer from registered framework element.");
}
var handler = GetVelocityScroller(element);
if (handler == null)
{
handler = new VelocityScroller(scrollViewer);
SetVelocityScroller(element, handler);
}
// Update velocity.
handler.Velocity = new Vector(e.VelocityX, e.VelocityY);
}
private static void PerformAutoPan(object sender, RoutedPanEventArgs e)
{
var element = sender as FrameworkElement;
var scrollViewer = GetScrollViewer(element);
if (scrollViewer == null)
{
throw new InvalidOperationException("Could not resolve scroll viewer from registered framework element.");
}
var handler = GetVelocityScroller(element);
if (handler == null)
{
handler = new VelocityScroller(scrollViewer);
SetVelocityScroller(element, handler);
}
// Update velocity.
handler.Velocity = new Vector(e.VelocityX, e.VelocityY);
}