ComponentFactory.Quicksilver.Layout.MetaPanelBase.OnIsAnimatingChanged C# (CSharp) Method

        private static void OnIsAnimatingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            MetaPanelBase metaPanelBase = (MetaPanelBase)d;

            // By always requesting a panel measure when the Rendering event is
            // fired we ensure that the panel invokes the animation instances and
            // the child elements are updated until the animation ends.
            if ((bool)e.NewValue)
            {
                // Reset the last ticks as we do not want to use the duration since the
                // last time animation finished, which might have been a long time ago
                metaPanelBase._lastTicks = -1;

                // This event is fired just before rendering of each display frame
                CompositionTarget.Rendering += new EventHandler(metaPanelBase.OnRendering);
            }
            else
                CompositionTarget.Rendering -= new EventHandler(metaPanelBase.OnRendering);

            // Raise the changed event
            EventHandler handler = metaPanelBase.IsAnimatingChanged;
            if (handler != null)
                handler(metaPanelBase, EventArgs.Empty);
        }