添加middleware

middleware/zdhsys/viewModel/GLA.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Media.Animation;
+
+namespace zdhsys.viewModel
+{
+    public class GLA : AnimationTimeline
+    {
+        public static readonly DependencyProperty FromProperty =
+            DependencyProperty.Register("From", typeof(GridLength), typeof(GLA));
+
+        public static readonly DependencyProperty ToProperty =
+            DependencyProperty.Register("To", typeof(GridLength), typeof(GLA));
+
+        public override Type TargetPropertyType
+        {
+            get { return typeof(GridLength); }
+        }
+
+        public override object GetCurrentValue(object defaultOriginValue, object defaultDestinationValue, AnimationClock animationClock)
+        {
+            if (From != null && To != null)
+            {
+                double fromValue = From.Value;
+                double toValue = To.Value;
+
+                double progress = animationClock.CurrentProgress.Value;
+                double value = fromValue + (toValue - fromValue) * progress;
+
+                return new GridLength(value);
+            }
+            else
+            {
+                return defaultOriginValue;
+            }
+        }
+
+        protected override Freezable CreateInstanceCore()
+        {
+            return new GLA();
+        }
+
+        public GridLength From
+        {
+            get { return (GridLength)GetValue(FromProperty); }
+            set { SetValue(FromProperty, value); }
+        }
+
+        public GridLength To
+        {
+            get { return (GridLength)GetValue(ToProperty); }
+            set { SetValue(ToProperty, value); }
+        }
+    }
+}