实现八个句柄调整区域大小的功能，包括光标切换和区域调整逻辑

Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs

@@ -35,6 +35,13 @@ namespace JoyD.Windows.CS
         // 当前选中的区域索引
         private int _selectedRegionIndex = -1;
         
+        // 句柄调整相关变量
+        private enum ResizeHandle { None, TopLeft, Top, TopRight, Right, BottomRight, Bottom, BottomLeft, Left }
+        private ResizeHandle _currentHandle = ResizeHandle.None;
+        private bool _isResizing = false;
+        private Point _resizeStartPoint;
+        private Rectangle _originalRectangle;
+        
         public Setting()
         {
             InitializeComponent();
@@ -61,7 +68,7 @@ namespace JoyD.Windows.CS
         }
         
         /// <summary>
-        /// 鼠标按下事件 - 处理右击退出绘制状态和左击开始绘制矩形
+        /// 鼠标按下事件 - 处理右击退出绘制状态、左击开始绘制矩形和开始调整区域大小
         /// </summary>
         private void PicBoxTemp_MouseDown(object sender, MouseEventArgs e)
         {
@@ -88,6 +95,26 @@ namespace JoyD.Windows.CS
                 // 刷新绘制
                 picBoxTemp.Invalidate();
             }
+            // 处理选中区域的调整大小
+            else if (e.Button == MouseButtons.Left && !_isDrawingMode && _selectedRegionIndex != -1)
+            {
+                RegionInfo selectedRegion = _drawnRectangles.FirstOrDefault(r => r.Index == _selectedRegionIndex);
+                if (selectedRegion != null)
+                {
+                    Rectangle controlRectangle = ImageRectangleToControlRectangle(selectedRegion.ImageRectangle);
+                    
+                    // 检查是否点击在句柄上
+                    _currentHandle = GetHoveredHandle(controlRectangle, e.Location);
+                    
+                    if (_currentHandle != ResizeHandle.None)
+                    {
+                        // 开始调整大小
+                        _isResizing = true;
+                        _resizeStartPoint = e.Location;
+                        _originalRectangle = controlRectangle;
+                    }
+                }
+            }
             // 处理左击开始绘制矩形
             else if (e.Button == MouseButtons.Left && _isDrawingMode)
             {
@@ -189,11 +216,43 @@ namespace JoyD.Windows.CS
 
         
         /// <summary>
-        /// 鼠标移动事件 - 更新矩形大小或检测鼠标悬停区域
+        /// 鼠标移动事件 - 更新矩形大小、检测鼠标悬停区域或更新光标
         /// </summary>
         private void PicBoxTemp_MouseMove(object sender, MouseEventArgs e)
         {
-            if (_isDrawing && _isDrawingMode)
+            // 处理调整大小
+            if (_isResizing && !_isDrawingMode && _selectedRegionIndex != -1)
+            {
+                RegionInfo selectedRegion = _drawnRectangles.FirstOrDefault(r => r.Index == _selectedRegionIndex);
+                if (selectedRegion != null)
+                {
+                    // 计算新的矩形大小
+                    Rectangle newRect = CalculateNewRectangle(_originalRectangle, _resizeStartPoint, e.Location, _currentHandle);
+                    
+                    // 确保矩形有最小尺寸
+                    if (newRect.Width > 10 && newRect.Height > 10)
+                    {
+                        // 转换为图像坐标并更新区域
+                        Point imageTopLeft = ControlPointToImagePoint(new Point(newRect.Left, newRect.Top));
+                        Point imageBottomRight = ControlPointToImagePoint(new Point(newRect.Right, newRect.Bottom));
+                        
+                        selectedRegion.ImageRectangle = new Rectangle(
+                            imageTopLeft.X,
+                            imageTopLeft.Y,
+                            imageBottomRight.X - imageTopLeft.X,
+                            imageBottomRight.Y - imageTopLeft.Y
+                        );
+                        
+                        // 重新创建叠加层以反映变化
+                        CreateRectangleOverlayImage();
+                        
+                        // 触发重绘
+                        picBoxTemp.Invalidate();
+                    }
+                }
+            }
+            // 处理绘制新矩形
+            else if (_isDrawing && _isDrawingMode)
             {
                 int width = e.X - _startPoint.X;
                 int height = e.Y - _startPoint.Y;
@@ -206,28 +265,56 @@ namespace JoyD.Windows.CS
                 
                 picBoxTemp.Invalidate();
             }
-            else if (!_isDrawingMode && !_isDrawing) // 就绪状态
+            // 处理鼠标悬停（更新光标或检测悬停区域）
+            else if (!_isDrawingMode && !_isDrawing && !_isResizing) // 就绪状态
             {
-                // 将鼠标坐标转换为图像坐标
+                // 如果有选中的区域，检查是否悬停在句柄上
-                Point imagePoint = ControlPointToImagePoint(e.Location);
+                if (_selectedRegionIndex != -1)
-                
-                // 检查鼠标是否在某个区域内，选择索引号最大的区域
-                int newHoveredRegionIndex = -1;
-                int maxIndex = -1;
-                foreach (RegionInfo region in _drawnRectangles)
                 {
-                    if (region.ImageRectangle.Contains(imagePoint) && region.Index > maxIndex)
+                    RegionInfo selectedRegion = _drawnRectangles.FirstOrDefault(r => r.Index == _selectedRegionIndex);
+                    if (selectedRegion != null)
                     {
-                        maxIndex = region.Index;
+                        Rectangle controlRectangle = ImageRectangleToControlRectangle(selectedRegion.ImageRectangle);
-                        newHoveredRegionIndex = region.Index;
+                        ResizeHandle hoveredHandle = GetHoveredHandle(controlRectangle, e.Location);
+                        
+                        if (hoveredHandle != ResizeHandle.None)
+                        {
+                            // 设置相应的光标
+                            SetCursorByHandle(hoveredHandle);
+                            return; // 不需要检查悬停区域
+                        }
+                        else
+                        {
+                            // 重置光标
+                            picBoxTemp.Cursor = Cursors.Default;
+                        }
                     }
                 }
                 
-                // 如果悬停的区域发生变化，更新并触发重绘
+                // 如果没有悬停在句柄上，检查是否悬停在区域上
-                if (newHoveredRegionIndex != _hoveredRegionIndex)
+                if (_currentHandle == ResizeHandle.None)
                 {
-                    _hoveredRegionIndex = newHoveredRegionIndex;
+                    // 将鼠标坐标转换为图像坐标
-                    picBoxTemp.Invalidate();
+                    Point imagePoint = ControlPointToImagePoint(e.Location);
+                    
+                    // 检查鼠标是否在某个区域内，选择索引号最大的区域
+                    int newHoveredRegionIndex = -1;
+                    int maxIndex = -1;
+                    foreach (RegionInfo region in _drawnRectangles)
+                    {
+                        if (region.ImageRectangle.Contains(imagePoint) && region.Index > maxIndex)
+                        {
+                            maxIndex = region.Index;
+                            newHoveredRegionIndex = region.Index;
+                        }
+                    }
+                    
+                    // 如果悬停的区域发生变化，更新并触发重绘
+                    if (newHoveredRegionIndex != _hoveredRegionIndex)
+                    {
+                        _hoveredRegionIndex = newHoveredRegionIndex;
+                        picBoxTemp.Invalidate();
+                    }
                 }
             }
         }
@@ -333,12 +420,22 @@ namespace JoyD.Windows.CS
         }
         
         /// <summary>
-        /// 鼠标释放事件 - 完成矩形绘制（优化版）
+        /// 鼠标释放事件 - 完成矩形绘制或调整大小
         /// 使用增量绘制，避免每次都重绘所有矩形
         /// 确保矩形坐标相对于图像而非控件
         /// </summary>
         private void PicBoxTemp_MouseUp(object sender, MouseEventArgs e)
         {
+            // 结束调整大小
+            if (_isResizing && e.Button == MouseButtons.Left)
+            {
+                _isResizing = false;
+                _currentHandle = ResizeHandle.None;
+                picBoxTemp.Cursor = Cursors.Default;
+                return;
+            }
+            
+            // 结束绘制新矩形
             if (_isDrawing && _isDrawingMode && e.Button == MouseButtons.Left && picBoxTemp.Image != null)
             {
                 _isDrawing = false;
@@ -693,6 +790,134 @@ namespace JoyD.Windows.CS
         /// <summary>
         /// 定时器每秒触发的事件处理方法
         /// </summary>
+        /// <summary>
+        /// 获取鼠标当前悬停的句柄
+        /// </summary>
+        /// <param name="rectangle">控件坐标的矩形</param>
+        /// <param name="mousePoint">鼠标坐标</param>
+        /// <returns>鼠标悬停的句柄类型</returns>
+        private ResizeHandle GetHoveredHandle(Rectangle rectangle, Point mousePoint)
+        {
+            int handleSize = 8; // 句柄检测范围稍大，提高用户体验
+            
+            // 检查各个句柄
+            if (IsPointInRegion(mousePoint, new Rectangle(rectangle.Left - handleSize/2, rectangle.Top - handleSize/2, handleSize, handleSize)))
+                return ResizeHandle.TopLeft;
+            if (IsPointInRegion(mousePoint, new Rectangle(rectangle.Left + rectangle.Width/2 - handleSize/2, rectangle.Top - handleSize/2, handleSize, handleSize)))
+                return ResizeHandle.Top;
+            if (IsPointInRegion(mousePoint, new Rectangle(rectangle.Right - handleSize/2, rectangle.Top - handleSize/2, handleSize, handleSize)))
+                return ResizeHandle.TopRight;
+            if (IsPointInRegion(mousePoint, new Rectangle(rectangle.Right - handleSize/2, rectangle.Top + rectangle.Height/2 - handleSize/2, handleSize, handleSize)))
+                return ResizeHandle.Right;
+            if (IsPointInRegion(mousePoint, new Rectangle(rectangle.Right - handleSize/2, rectangle.Bottom - handleSize/2, handleSize, handleSize)))
+                return ResizeHandle.BottomRight;
+            if (IsPointInRegion(mousePoint, new Rectangle(rectangle.Left + rectangle.Width/2 - handleSize/2, rectangle.Bottom - handleSize/2, handleSize, handleSize)))
+                return ResizeHandle.Bottom;
+            if (IsPointInRegion(mousePoint, new Rectangle(rectangle.Left - handleSize/2, rectangle.Bottom - handleSize/2, handleSize, handleSize)))
+                return ResizeHandle.BottomLeft;
+            if (IsPointInRegion(mousePoint, new Rectangle(rectangle.Left - handleSize/2, rectangle.Top + rectangle.Height/2 - handleSize/2, handleSize, handleSize)))
+                return ResizeHandle.Left;
+            
+            return ResizeHandle.None;
+        }
+        
+        /// <summary>
+        /// 检查点是否在矩形区域内
+        /// </summary>
+        private bool IsPointInRegion(Point point, Rectangle region)
+        {
+            return region.Contains(point);
+        }
+        
+        /// <summary>
+        /// 根据句柄类型设置光标
+        /// </summary>
+        private void SetCursorByHandle(ResizeHandle handle)
+        {
+            switch (handle)
+            {
+                case ResizeHandle.TopLeft:
+                case ResizeHandle.BottomRight:
+                    picBoxTemp.Cursor = Cursors.SizeNWSE;
+                    break;
+                case ResizeHandle.TopRight:
+                case ResizeHandle.BottomLeft:
+                    picBoxTemp.Cursor = Cursors.SizeNESW;
+                    break;
+                case ResizeHandle.Top:
+                case ResizeHandle.Bottom:
+                    picBoxTemp.Cursor = Cursors.SizeNS;
+                    break;
+                case ResizeHandle.Left:
+                case ResizeHandle.Right:
+                    picBoxTemp.Cursor = Cursors.SizeWE;
+                    break;
+                default:
+                    picBoxTemp.Cursor = Cursors.Default;
+                    break;
+            }
+        }
+        
+        /// <summary>
+        /// 根据鼠标移动计算新的矩形大小
+        /// </summary>
+        private Rectangle CalculateNewRectangle(Rectangle original, Point startPoint, Point currentPoint, ResizeHandle handle)
+        {
+            Rectangle newRect = original;
+            
+            switch (handle)
+            {
+                case ResizeHandle.TopLeft:
+                    newRect.X = currentPoint.X;
+                    newRect.Y = currentPoint.Y;
+                    newRect.Width = original.Right - currentPoint.X;
+                    newRect.Height = original.Bottom - currentPoint.Y;
+                    break;
+                case ResizeHandle.Top:
+                    newRect.Y = currentPoint.Y;
+                    newRect.Height = original.Bottom - currentPoint.Y;
+                    break;
+                case ResizeHandle.TopRight:
+                    newRect.Y = currentPoint.Y;
+                    newRect.Width = currentPoint.X - original.Left;
+                    newRect.Height = original.Bottom - currentPoint.Y;
+                    break;
+                case ResizeHandle.Right:
+                    newRect.Width = currentPoint.X - original.Left;
+                    break;
+                case ResizeHandle.BottomRight:
+                    newRect.Width = currentPoint.X - original.Left;
+                    newRect.Height = currentPoint.Y - original.Top;
+                    break;
+                case ResizeHandle.Bottom:
+                    newRect.Height = currentPoint.Y - original.Top;
+                    break;
+                case ResizeHandle.BottomLeft:
+                    newRect.X = currentPoint.X;
+                    newRect.Width = original.Right - currentPoint.X;
+                    newRect.Height = currentPoint.Y - original.Top;
+                    break;
+                case ResizeHandle.Left:
+                    newRect.X = currentPoint.X;
+                    newRect.Width = original.Right - currentPoint.X;
+                    break;
+            }
+            
+            // 确保矩形不会变成负尺寸
+            if (newRect.Width < 0)
+            {
+                newRect.X += newRect.Width;
+                newRect.Width = Math.Abs(newRect.Width);
+            }
+            if (newRect.Height < 0)
+            {
+                newRect.Y += newRect.Height;
+                newRect.Height = Math.Abs(newRect.Height);
+            }
+            
+            return newRect;
+        }
+        
         /// <summary>
         /// 绘制矩形的八个句柄
         /// </summary>
@@ -754,7 +979,7 @@ namespace JoyD.Windows.CS
         private void PicBoxTemp_MouseClick(object sender, MouseEventArgs e)
         {
             // 仅在就绪状态（非绘制模式）下处理
-            if (!_isDrawingMode && e.Button == MouseButtons.Left && picBoxTemp.Image != null)
+            if (!_isDrawingMode && e.Button == MouseButtons.Left && picBoxTemp.Image != null && !_isResizing)
             {
                 // 将控件坐标转换为图像坐标
                 Point imagePoint = ControlPointToImagePoint(e.Location);