实现温差图例颜色修改时同步更新温差层像素颜色功能

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

@@ -4,8 +4,10 @@ using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Drawing.Drawing2D;
+using System.Drawing.Imaging;
 using System.IO;
 using System.Linq;
+using System.Runtime.InteropServices;
 using System.Text;
 using System.Windows.Forms;
 
@@ -617,14 +619,22 @@ namespace JoyD.Windows.CS
                     using (ColorDialog colorDialog = new ColorDialog())
                     {
                         // 设置初始颜色为当前行的颜色
-                        colorDialog.Color = (Color)tempDiffData[e.RowIndex]["color"];
+                        Color oldColor = (Color)tempDiffData[e.RowIndex]["color"];
+                        colorDialog.Color = oldColor;
                         
                         if (colorDialog.ShowDialog() == DialogResult.OK)
                         {
+                            Color newColor = colorDialog.Color;
                             // 更新颜色数据
-                            tempDiffData[e.RowIndex]["color"] = colorDialog.Color;
+                            tempDiffData[e.RowIndex]["color"] = newColor;
                             // 刷新单元格以显示新颜色
                             dataGridViewTempDiff.Refresh();
+                            
+                            // 更新温差层图像中所有原颜色的像素为新颜色
+                            if (_tempDiffOverlayImage != null)
+                            {
+                                UpdateTempDiffOverlayPixelsColor(oldColor, newColor);
+                            }
                         }
                     }
                 }
@@ -2588,6 +2598,74 @@ namespace JoyD.Windows.CS
             }
         }
         
+        /// <summary>
+        /// 更新温差层图像中指定颜色的所有像素
+        /// 将旧颜色的像素替换为新颜色
+        /// </summary>
+        /// <param name="oldColor">需要替换的旧颜色</param>
+        /// <param name="newColor">替换后的新颜色</param>
+        private void UpdateTempDiffOverlayPixelsColor(Color oldColor, Color newColor)
+        {
+            if (_tempDiffOverlayImage == null || !( _tempDiffOverlayImage is Bitmap))
+                return;
+            
+            Bitmap bitmap = (Bitmap)_tempDiffOverlayImage;
+            
+            // 锁定位图以提高性能
+            BitmapData bitmapData = bitmap.LockBits(
+                new Rectangle(0, 0, bitmap.Width, bitmap.Height),
+                ImageLockMode.ReadWrite,
+                PixelFormat.Format32bppArgb);
+            
+            try
+            {
+                int bytesPerPixel = 4; // 32bppArgb格式每像素4字节
+                int byteCount = bitmapData.Stride * bitmapData.Height;
+                byte[] pixels = new byte[byteCount];
+                
+                // 将图像数据复制到数组
+                Marshal.Copy(bitmapData.Scan0, pixels, 0, byteCount);
+                
+                // 转换颜色为ARGB字节数组以便比较
+                byte oldA = oldColor.A;
+                byte oldR = oldColor.R;
+                byte oldG = oldColor.G;
+                byte oldB = oldColor.B;
+                
+                byte newA = newColor.A;
+                byte newR = newColor.R;
+                byte newG = newColor.G;
+                byte newB = newColor.B;
+                
+                // 遍历所有像素并替换颜色
+                for (int i = 0; i < byteCount; i += bytesPerPixel)
+                {
+                    // ARGB格式：从低位到高位是B, G, R, A
+                    if (pixels[i] == oldB && pixels[i + 1] == oldG && pixels[i + 2] == oldR && pixels[i + 3] == oldA)
+                    {
+                        pixels[i] = newB;     // B
+                        pixels[i + 1] = newG; // G
+                        pixels[i + 2] = newR; // R
+                        pixels[i + 3] = newA; // A
+                    }
+                }
+                
+                // 将修改后的数据复制回位图
+                Marshal.Copy(pixels, 0, bitmapData.Scan0, byteCount);
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine("更新温差层像素颜色失败: " + ex.Message);
+            }
+            finally
+            {
+                // 解锁位图
+                bitmap.UnlockBits(bitmapData);
+                // 刷新图像显示
+                picBoxTemp.Invalidate();
+            }
+        }
+        
         /// <summary>
         /// 当图像更新或控件大小变化时，重新创建叠加层图像
         /// 确保矩形框正确显示在新的尺寸下