Add FadeWipe

Author: Tyrrrz

MaterialDesignThemes.Wpf/MaterialDesignThemes.Wpf.csproj

@@ -331,6 +331,7 @@
     <Compile Include="SnackbarMessageQueueItem.cs" />
     <Compile Include="Transitions\CircleWipe.cs" />
     <Compile Include="IHintProxy.cs" />
+    <Compile Include="Transitions\FadeWipe.cs" />
     <Compile Include="Transitions\IndexedItemOffsetMultiplierExtension.cs" />
     <Compile Include="Transitions\ITransitionEffect.cs" />
     <Compile Include="Transitions\ITransitionEffectSubject.cs" />

MaterialDesignThemes.Wpf/Transitions/FadeWipe.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Windows;
+using System.Windows.Media.Animation;
+
+namespace MaterialDesignThemes.Wpf.Transitions
+{
+    public class FadeWipe : ITransitionWipe
+    {
+        private readonly SineEase _sineEase = new SineEase();
+
+        /// <summary>
+        /// Duration of the animation
+        /// </summary>
+        public TimeSpan Duration { get; set; } = TimeSpan.FromSeconds(0.5);
+
+        public void Wipe(TransitionerSlide fromSlide, TransitionerSlide toSlide, Point origin, IZIndexController zIndexController)
+        {
+            if (fromSlide == null) throw new ArgumentNullException(nameof(fromSlide));
+            if (toSlide == null) throw new ArgumentNullException(nameof(toSlide));
+            if (zIndexController == null) throw new ArgumentNullException(nameof(zIndexController));
+
+            // Set up time points
+            var zeroKeyTime = KeyTime.FromTimeSpan(TimeSpan.Zero);
+            var endKeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(Duration.TotalSeconds/2));
+
+            // Old
+            var fromAnimation = new DoubleAnimationUsingKeyFrames();
+            fromAnimation.KeyFrames.Add(new LinearDoubleKeyFrame(1, zeroKeyTime));
+            fromAnimation.KeyFrames.Add(new EasingDoubleKeyFrame(0, endKeyTime, _sineEase));
+
+            // New
+            var toAnimation = new DoubleAnimationUsingKeyFrames();
+            toAnimation.KeyFrames.Add(new LinearDoubleKeyFrame(0, zeroKeyTime));
+            toAnimation.KeyFrames.Add(new EasingDoubleKeyFrame(1, endKeyTime, _sineEase));
+
+            // Preset
+            fromSlide.Opacity = 1;
+            toSlide.Opacity = 0;
+
+            // Animate
+            fromAnimation.Completed += (sender, args) => toSlide.BeginAnimation(UIElement.OpacityProperty, toAnimation);
+            fromSlide.BeginAnimation(UIElement.OpacityProperty, fromAnimation);
+
+            zIndexController.Stack(toSlide, fromSlide);
+        }
+    }
+}

MaterialDesignThemes.Wpf/Transitions/SlideWipe.cs

@@ -32,52 +32,28 @@ public void Wipe(TransitionerSlide fromSlide, TransitionerSlide toSlide, Point o
             var endKeyTime = KeyTime.FromTimeSpan(Duration);
 
             // Set up coordinates
-            double fromStartX, fromEndX, toStartX, toEndX;
-            double fromStartY, fromEndY, toStartY, toEndY;
+            double fromStartX = 0, fromEndX = 0, toStartX = 0, toEndX = 0;
+            double fromStartY = 0, fromEndY = 0, toStartY = 0, toEndY = 0;
 
             if (Direction == SlideDirection.Left)
             {
-                fromStartX = 0;
-                fromStartY = 0;
                 fromEndX = -fromSlide.ActualWidth;
-                fromEndY = 0;
                 toStartX = toSlide.ActualWidth;
-                toStartY = 0;
-                toEndX = 0;
-                toEndY = 0;
             }
             else if (Direction == SlideDirection.Right)
             {
-                fromStartX = 0;
-                fromStartY = 0;
                 fromEndX = fromSlide.ActualWidth;
-                fromEndY = 0;
                 toStartX = -toSlide.ActualWidth;
-                toStartY = 0;
-                toEndX = 0;
-                toEndY = 0;
             }
             else if (Direction == SlideDirection.Up)
             {
-                fromStartX = 0;
-                fromStartY = 0;
-                fromEndX = 0;
                 fromEndY = -fromSlide.ActualHeight;
-                toStartX = 0;
                 toStartY = toSlide.ActualHeight;
-                toEndX = 0;
-                toEndY = 0;
             }
-            else // if (Direction == SlideDirection.Down)
+            else if (Direction == SlideDirection.Down)
             {
-                fromStartX = 0;
-                fromStartY = 0;
-                fromEndX = 0;
                 fromEndY = fromSlide.ActualHeight;
-                toStartX = 0;
                 toStartY = -toSlide.ActualHeight;
-                toEndX = 0;
-                toEndY = 0;
             }
 
             // Old