completed the branch

src/Core_30/HandyControl_Core_30/HandyControl_Core_30.csproj

@@ -38,4 +38,9 @@
   <ItemGroup>
     <None Remove="Themes\Styles\Base\TreeViewBaseStyle.xaml" />
   </ItemGroup>
+  <ItemGroup>
+    <Resource Include="..\..\Shared\HandyControl_Shared\Resources\dropper.cur">
+      <Link>Resources\dropper.cur</Link>
+    </Resource>
+  </ItemGroup>
 </Project>

src/Net_40/HandyControl_Net_40/HandyControl_Net_40.csproj

@@ -100,6 +100,11 @@
       <LastGenOutput>Lang.Designer.cs</LastGenOutput>
     </EmbeddedResource>
   </ItemGroup>
+  <ItemGroup>
+    <Resource Include="..\..\Shared\HandyControl_Shared\Resources\dropper.cur">
+      <Link>Resources\dropper.cur</Link>
+    </Resource>
+  </ItemGroup>
   <Import Project="..\..\Shared\HandyControl_Shared\HandyControl_Shared.projitems" Label="Shared" />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>

src/Shared/HandyControl_Shared/Controls/ColorPicker/ColorDropper.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Windows;
-using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Media;
 using HandyControl.Data;
@@ -9,8 +8,10 @@ using HandyControl.Tools.Interop;
 
 namespace HandyControl.Controls
 {
-    internal class ColorDropper : Control
+    internal class ColorDropper
     {
+        private bool _cursorIsSetted;
+
         private Cursor _dropperCursor;
 
         private readonly ColorPicker _colorPicker;
@@ -26,8 +27,7 @@ namespace HandyControl.Controls
             {
                 if (_dropperCursor == null)
                 {
-                    var info = Application.GetResourceStream(
-                        new Uri("pack://application:,,,/HandyControl;Component/Resources/dropper.cur"));
+                    var info = Application.GetResourceStream(new Uri("pack://application:,,,/HandyControl;Component/Resources/dropper.cur"));
                     if (info != null)
                     {
                         _dropperCursor = new Cursor(info.Stream);
@@ -36,24 +36,61 @@ namespace HandyControl.Controls
 
                 if (_dropperCursor == null) return;
 
-                Mouse.OverrideCursor = _dropperCursor;
                 MouseHook.Start();
                 MouseHook.StatusChanged += MouseHook_StatusChanged;
             }
             else
             {
                 Mouse.OverrideCursor = Cursors.Arrow;
+                MouseHook.Stop();
+                MouseHook.StatusChanged -= MouseHook_StatusChanged;
             }
         }
 
         private void MouseHook_StatusChanged(object sender, MouseHookEventArgs e)
         {
-            if (!_colorPicker.IsMouseOver && e.Message == MouseHookMessageType.LeftButtonDown)
+            var window = System.Windows.Window.GetWindow(_colorPicker);
+            if (window == null)
             {
-                var brush = new SolidColorBrush(GetColorAt(e.Point.X, e.Point.Y));
-                _colorPicker.SelectedBrush = brush;
-                //MouseHook.Stop();
-                //MouseHook.StatusChanged -= MouseHook_StatusChanged;
+                UpdateCursor(false);
+
+                return;
+            }
+
+            if (!_colorPicker.IsMouseOver && window.IsMouseOver)
+            {
+                UpdateCursor(true);
+                if (e.Message == MouseHookMessageType.LeftButtonDown)
+                {
+                    var brush = new SolidColorBrush(GetColorAt(e.Point.X, e.Point.Y));
+                    _colorPicker.SelectedBrush = brush;
+                }
+            }
+            else
+            {
+                UpdateCursor(false);
+            }
+        }
+
+        private void UpdateCursor(bool isDropper)
+        {
+            if (isDropper)
+            {
+                Mouse.Captured?.ReleaseMouseCapture();
+
+                if (!_cursorIsSetted)
+                {
+                    Mouse.OverrideCursor = _dropperCursor;
+                    _cursorIsSetted = true;
+                }
+            }
+            else
+            {
+                if (_cursorIsSetted)
+                {
+                    Mouse.OverrideCursor = Cursors.Arrow;
+                    _cursorIsSetted = false;
+                }
             }
         }
 

src/Shared/HandyControl_Shared/Controls/ColorPicker/ColorPicker.cs

@@ -61,6 +61,8 @@ namespace HandyControl.Controls
 
         private bool _appliedTemplate;
 
+        private bool _disposed;
+
         /// <summary>
         ///     当前显示的颜色类型
         /// </summary>
@@ -340,6 +342,11 @@ namespace HandyControl.Controls
             }
         }
 
+        ~ColorPicker()
+        {
+            Dispose(false);
+        }
+
         public ColorPicker()
         {
             CommandBindings.Add(new CommandBinding(ControlCommands.Confirm, ButtonConfirm_OnClick));
@@ -704,8 +711,25 @@ namespace HandyControl.Controls
             _colorDropper.Update(_toggleButtonDropper.IsChecked.Value);
         }
 
-        public void Dispose() => System.Windows.Window.GetWindow(this)?.Close();
+        protected virtual void Dispose(bool disposing)
+        {
+            if (_disposed) return;
+
+            Dispatcher.BeginInvoke(new Action(() =>
+            {
+                _colorDropper?.Update(false);
+                System.Windows.Window.GetWindow(this)?.Close();
+            }));
+            _disposed = true;
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
 
         public bool CanDispose { get; } = true;
+        
     }
 }