Splashscreen fadein and fadeout animation

Author: rocksdanister

src/Lively/Lively/App.xaml.cs

@@ -156,7 +156,7 @@ public App()
             //On first run default assets are installed by UI to avoid slow startup times and better user experience.
             if (userSettings.Settings.IsUpdated || userSettings.Settings.IsFirstRun)
             {
-                SplashWindow spl = userSettings.Settings.IsFirstRun ? new() : null; spl?.Show();
+                SplashWindow spl = userSettings.Settings.IsFirstRun ? new(0, 500) : null; spl?.Show();
                 var maxWallpaper = ZipExtract.ExtractAssetBundle(userSettings.Settings.WallpaperBundleVersion,
                     Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "bundle", "wallpapers"),
                     Path.Combine(userSettings.Settings.WallpaperDir, Constants.CommonPartialPaths.WallpaperInstallDir));

src/Lively/Lively/Views/SplashWindow.xaml.cs

@@ -9,6 +9,7 @@
 using System.Windows.Documents;
 using System.Windows.Input;
 using System.Windows.Media;
+using System.Windows.Media.Animation;
 using System.Windows.Media.Imaging;
 using System.Windows.Shapes;
 
@@ -19,9 +20,35 @@ namespace Lively.Views
     /// </summary>
     public partial class SplashWindow : Window
     {
+        private readonly double fadeInDuration = 200;
+        private readonly double fadeOutDuration = 200;
+
         public SplashWindow()
         {
             InitializeComponent();
         }
+
+        public SplashWindow(double fadeInDuration, double fadeOutDuration) : this()
+        {
+            this.fadeInDuration = fadeInDuration;
+            this.fadeOutDuration = fadeOutDuration;
+            this.Closing += Window_Closing;
+            this.Loaded += Window_Loaded;
+        }
+
+        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
+        {
+            this.Closing -= Window_Closing;
+            e.Cancel = true;
+            var anim = new DoubleAnimation(0, (Duration)TimeSpan.FromMilliseconds(fadeOutDuration));
+            anim.Completed += (s, _) => this.Close();
+            this.BeginAnimation(UIElement.OpacityProperty, anim);
+        }
+
+        private void Window_Loaded(object sender, RoutedEventArgs e)
+        {
+            var anim = new DoubleAnimation(0, 1, (Duration)TimeSpan.FromMilliseconds(fadeInDuration));
+            this.BeginAnimation(UIElement.OpacityProperty, anim);
+        }
     }
 }