将颜色选择按钮从文本按钮改为图标按钮，显示_selectedColor颜色的矩形

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

@@ -124,11 +124,12 @@
             // 
             // btnSelectColor
             // 
-            this.btnSelectColor.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;
+            this.btnSelectColor.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Image;
+            this.btnSelectColor.ImageTransparentColor = System.Drawing.Color.Transparent;
             this.btnSelectColor.Name = "btnSelectColor";
-            this.btnSelectColor.Size = new System.Drawing.Size(75, 22);
+            this.btnSelectColor.Size = new System.Drawing.Size(23, 22);
             this.btnSelectColor.Text = "选择颜色";
-            this.btnSelectColor.ToolTipText = "选择绘制区域的颜色";
+            this.btnSelectColor.ToolTipText = "选择绘制区域的颜色(点击更换颜色)";
             // 
             // Setting
             // 

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

@@ -201,6 +201,39 @@ namespace JoyD.Windows.CS
             btnDrawRegion.Image = icon;
             btnDrawRegion.ImageTransparentColor = Color.Transparent;
             
+            // 设置颜色选择按钮的图标
+            UpdateColorButtonIcon();
+        }
+        
+        /// <summary>
+        /// 更新颜色选择按钮的图标，显示_selectedColor颜色的矩形
+        /// </summary>
+        private void UpdateColorButtonIcon()
+        {
+            // 创建颜色选择按钮的图标
+            Bitmap colorIcon = new Bitmap(24, 24);
+            using (Graphics g = Graphics.FromImage(colorIcon))
+            {
+                // 设置高质量绘图
+                g.SmoothingMode = SmoothingMode.AntiAlias;
+                
+                // 清除背景为透明
+                g.Clear(Color.Transparent);
+                
+                // 绘制边框
+                g.DrawRectangle(new Pen(Color.Black, 1), 3, 3, 18, 18);
+                
+                // 使用_selectedColor填充矩形
+                using (SolidBrush brush = new SolidBrush(_selectedColor))
+                {
+                    g.FillRectangle(brush, 4, 4, 16, 16);
+                }
+            }
+            
+            // 设置按钮图标并设置透明色
+            btnSelectColor.Image = colorIcon;
+            btnSelectColor.ImageTransparentColor = Color.Transparent;
+            
             // 启用双缓冲以减少闪烁
             typeof(PictureBox).InvokeMember("DoubleBuffered", 
                 System.Reflection.BindingFlags.SetProperty | 
@@ -229,11 +262,11 @@ namespace JoyD.Windows.CS
                     // 更新选中的颜色
                     _selectedColor = colorDialog.Color;
                     
+                    // 更新按钮图标，显示新选择的颜色
+                    UpdateColorButtonIcon();
+                    
                     // 重绘图片区域，显示新颜色的矩形
                     picBoxTemp.Invalidate();
-                    
-                    // 更新按钮文本，显示当前选中的颜色
-                    btnSelectColor.Text = string.Format("颜色: {0}", _selectedColor.Name);
                 }
             }
         }