Avalonia/samples/RenderDemo/Pages/TransitionsPage.xaml.cs

using Avalonia.Animation;
using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Markup.Xaml;
using RenderDemo.ViewModels;

namespace RenderDemo.Pages
{
    public class TransitionsPage : UserControl
    {
        public TransitionsPage()
        {
            InitializeComponent();
            this.DataContext = new AnimationsPageViewModel();
        }

        private void InitializeComponent()
        {
            AvaloniaXamlLoader.Load(this);
        }

        private void ToggleClock(object sender, RoutedEventArgs args)
        {
            var button = sender as Button;
            var clock = button.Clock;

            if (clock.PlayState == PlayState.Run)
            {
                clock.PlayState = PlayState.Pause;
            }
            else if (clock.PlayState == PlayState.Pause)
            {
                clock.PlayState = PlayState.Run;
            }
        }
    }
}