/// <exception cref="InvalidOperationException">The IsScrolling property is read-only. </exception>
internal void IsScrollingPropertyChanged(DependencyPropertyChangedEventArgs e)
{
if (_allowIsScrollingChanges != true)
{
throw new InvalidOperationException("The IsScrolling property is read-only. ");
}
_isScrolling = (bool)e.NewValue;
var args = new ScrollingStateChangedEventArgs((bool)e.OldValue, (bool)e.NewValue);
OnScrollingStateChanged(args);
var handler = ScrollingStateChanged;
if (handler != null)
{
handler(this, args);
}
}
protected virtual void OnScrollingStateChanged(ScrollingStateChangedEventArgs e)
{
// Must be empty
}
