From 8fa4586c8a7d8cd808784299f210c277ea5b7b1c Mon Sep 17 00:00:00 2001
From: NaBian <836904362@qq.com>
Date: Thu, 26 Sep 2019 21:39:04 +0800
Subject: [PATCH] add DiscreteGeometryKeyFrame

---
 .../Animation/DiscreteGeometryKeyFrame.cs     | 22 +++++++++++++++++++
 .../Media/Animation/GeometryKeyFrame.cs       |  5 +++++
 2 files changed, 27 insertions(+)
 create mode 100644 src/Shared/HandyControl_Shared/Media/Animation/DiscreteGeometryKeyFrame.cs

diff --git a/src/Shared/HandyControl_Shared/Media/Animation/DiscreteGeometryKeyFrame.cs b/src/Shared/HandyControl_Shared/Media/Animation/DiscreteGeometryKeyFrame.cs
new file mode 100644
index 00000000..047e4c5f
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Media/Animation/DiscreteGeometryKeyFrame.cs
@@ -0,0 +1,22 @@
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Media.Animation;
+
+public class DiscreteGeometryKeyFrame : GeometryKeyFrame
+{
+    public DiscreteGeometryKeyFrame()
+    {
+    }
+
+    public DiscreteGeometryKeyFrame(Geometry value) : base(value)
+    {
+    }
+
+    public DiscreteGeometryKeyFrame(Geometry value, KeyTime keyTime) : base(value, keyTime)
+    {
+    }
+
+    protected override Freezable CreateInstanceCore() => new DiscreteGeometryKeyFrame();
+
+    protected override Geometry InterpolateValueCore(Geometry baseValue, double keyFrameProgress) => keyFrameProgress < 1.0 ? baseValue : Value;
+}
\ No newline at end of file
diff --git a/src/Shared/HandyControl_Shared/Media/Animation/GeometryKeyFrame.cs b/src/Shared/HandyControl_Shared/Media/Animation/GeometryKeyFrame.cs
index fca1fe0a..0f743acc 100644
--- a/src/Shared/HandyControl_Shared/Media/Animation/GeometryKeyFrame.cs
+++ b/src/Shared/HandyControl_Shared/Media/Animation/GeometryKeyFrame.cs
@@ -5,6 +5,11 @@ using System.Windows.Media.Animation;
 
 public abstract class GeometryKeyFrame : Freezable, IKeyFrame
 {
+    protected GeometryKeyFrame()
+    {
+        
+    }
+
     protected GeometryKeyFrame(Geometry value)
     {
         Value = value;