fix: close #1743

src/Shared/HandyControl_Shared/Controls/Drawer/Drawer.cs

@@ -17,23 +17,14 @@ namespace HandyControl.Controls;
 public class Drawer : FrameworkElement
 {
     private Storyboard _storyboard;
-
     private AdornerContainer _container;
-
     private ContentControl _animationControl;
-
     private TranslateTransform _translateTransform;
-
     private double _animationLength;
-
     private string _animationPropertyName;
-
     private FrameworkElement _maskElement;
-
     private AdornerLayer _layer;
-
     private UIElement _contentElement;
-
     private Point _contentRenderTransformOrigin;
 
     static Drawer()
@@ -59,7 +50,8 @@ public class Drawer : FrameworkElement
     private static void DataContextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) =>
         ((Drawer) d).OnDataContextPropertyChanged(e);
 
-    private void OnDataContextPropertyChanged(DependencyPropertyChangedEventArgs e) => UpdateDataContext(_animationControl, e.OldValue, e.NewValue);
+    private void OnDataContextPropertyChanged(DependencyPropertyChangedEventArgs e) =>
+        UpdateDataContext(_animationControl, e.OldValue, e.NewValue);
 
     public static readonly RoutedEvent OpenedEvent =
         EventManager.RegisterRoutedEvent("Opened", RoutingStrategy.Bubble,
@@ -82,7 +74,9 @@ public class Drawer : FrameworkElement
     }
 
     public static readonly DependencyProperty IsOpenProperty = DependencyProperty.Register(
-        nameof(IsOpen), typeof(bool), typeof(Drawer), new FrameworkPropertyMetadata(ValueBoxes.FalseBox, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, OnIsOpenChanged));
+        nameof(IsOpen), typeof(bool), typeof(Drawer),
+        new FrameworkPropertyMetadata(ValueBoxes.FalseBox, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
+            OnIsOpenChanged));
 
     private static void OnIsOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
     {
@@ -218,7 +212,8 @@ public class Drawer : FrameworkElement
 
         _animationControl.DataContext = DataContext;
         _animationControl.CommandBindings.Clear();
-        _animationControl.CommandBindings.Add(new CommandBinding(ControlCommands.Close, (s, e) => SetCurrentValue(IsOpenProperty, ValueBoxes.FalseBox)));
+        _animationControl.CommandBindings.Add(new CommandBinding(ControlCommands.Close,
+            (s, e) => SetCurrentValue(IsOpenProperty, ValueBoxes.FalseBox)));
         panel.Children.Add(_animationControl);
         _container = new AdornerContainer(_layer)
         {
@@ -248,31 +243,20 @@ public class Drawer : FrameworkElement
             return;
         }
 
-        AdornerDecorator decorator;
+        AdornerDecorator decorator = VisualHelper.GetParent<DrawerContainer>(this);
-        var parent = VisualHelper.GetParent<DrawerContainer>(this);
+        decorator ??= VisualHelper.GetChild<AdornerDecorator>(System.Windows.Window.GetWindow(this));
-        if (parent != null)
+        if (decorator == null)
         {
-            _contentElement = parent.Child;
+            return;
-            decorator = parent;
-        }
-        else
-        {
-            var window = WindowHelper.GetActiveWindow();
-            if (window == null)
-            {
-                return;
-            }
-
-            decorator = VisualHelper.GetChild<AdornerDecorator>(window);
-            _contentElement = window.Content as UIElement;
         }
 
+        _contentElement = decorator.Child;
         if (_contentElement == null)
         {
             return;
         }
 
-        _layer = decorator?.AdornerLayer;
+        _layer = decorator.AdornerLayer;
         if (_layer == null)
         {
             return;
@@ -328,6 +312,7 @@ public class Drawer : FrameworkElement
             Storyboard.SetTargetProperty(drawerAnimation, new PropertyPath(_animationPropertyName));
             _storyboard.Children.Add(drawerAnimation);
         }
+
         _storyboard.Begin();
     }
 
@@ -380,7 +365,8 @@ public class Drawer : FrameworkElement
             ? AnimationHelper.CreateAnimation(.9)
             : AnimationHelper.CreateAnimation(1);
         Storyboard.SetTarget(animationX, _contentElement);
-        Storyboard.SetTargetProperty(animationX, new PropertyPath("(UIElement.RenderTransform).(ScaleTransform.ScaleX)"));
+        Storyboard.SetTargetProperty(animationX,
+            new PropertyPath("(UIElement.RenderTransform).(ScaleTransform.ScaleX)"));
 
         _storyboard.Children.Add(animationX);
 
@@ -388,7 +374,8 @@ public class Drawer : FrameworkElement
             ? AnimationHelper.CreateAnimation(.9)
             : AnimationHelper.CreateAnimation(1);
         Storyboard.SetTarget(animationY, _contentElement);
-        Storyboard.SetTargetProperty(animationY, new PropertyPath("(UIElement.RenderTransform).(ScaleTransform.ScaleY)"));
+        Storyboard.SetTargetProperty(animationY,
+            new PropertyPath("(UIElement.RenderTransform).(ScaleTransform.ScaleY)"));
 
         _storyboard.Children.Add(animationY);
     }