Move ThemeAnimationHelper to Helper Folder

src/Shared/HandyControlDemo_Shared/App.xaml.cs

@@ -12,6 +12,7 @@
 using HandyControl.Themes;
 using HandyControl.Tools;
 using HandyControl.Tools.Extension;
+using HandyControl.Tools.Helper;
 using HandyControlDemo.Data;
 using HandyControlDemo.Properties.Langs;
 using HandyControlDemo.Tools;

src/Shared/HandyControl_Shared/Tools/Helper/ThemeAnimationHelper.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Media.Animation;
+
+namespace HandyControl.Tools.Helper;
+public static class ThemeAnimationHelper
+{
+    public async static void AnimateTheme(UIElement element, SlideDirection slideDirection, double durationSeconds, double fromOpacity, double toOpacity)
+    {
+        if (element != null)
+        {
+            DoubleAnimation opacityAnimation = new DoubleAnimation();
+            opacityAnimation.From = fromOpacity;
+            opacityAnimation.To = toOpacity;
+            opacityAnimation.Duration = TimeSpan.FromSeconds(durationSeconds);
+
+            ThicknessAnimation slideAnimation = new ThicknessAnimation();
+            slideAnimation.Duration = TimeSpan.FromSeconds(durationSeconds);
+            slideAnimation.From = GetSlideFromThickness(element, slideDirection);
+            slideAnimation.To = new Thickness(0);
+
+            Storyboard storyboard = new Storyboard();
+            storyboard.Children.Add(opacityAnimation);
+            storyboard.Children.Add(slideAnimation);
+            Storyboard.SetTarget(opacityAnimation, element);
+            Storyboard.SetTargetProperty(opacityAnimation, new PropertyPath(UIElement.OpacityProperty));
+            Storyboard.SetTarget(slideAnimation, element);
+            Storyboard.SetTargetProperty(slideAnimation, new PropertyPath(FrameworkElement.MarginProperty));
+
+            storyboard.Begin();
+#if NET40
+            Thread.Sleep(TimeSpan.FromSeconds(durationSeconds));
+#else
+            await Task.Delay(TimeSpan.FromSeconds(durationSeconds)); // Wait for the fade out animation to finish
+#endif
+        }
+    }
+
+    public enum SlideDirection
+    {
+        Left,
+        Right,
+        Top,
+        Bottom
+    }
+
+    private static Thickness GetSlideFromThickness(UIElement element, SlideDirection slideDirection)
+    {
+        double elementWidth = element.RenderSize.Width;
+        double elementHeight = element.RenderSize.Height;
+
+        switch (slideDirection)
+        {
+            case SlideDirection.Left:
+                return new Thickness(-elementWidth, 0, elementWidth, 0);
+            case SlideDirection.Right:
+                return new Thickness(elementWidth, 0, -elementWidth, 0);
+            case SlideDirection.Top:
+                return new Thickness(0, -elementHeight, 0, elementHeight);
+            case SlideDirection.Bottom:
+                return new Thickness(0, elementHeight, 0, -elementHeight);
+            default:
+                return new Thickness();
+        }
+    }
+
+}