缘由
看过上篇文章《OpenCvSharp基于颜色反差规避FBA面单贴标(2)》的都应该有印象这么一行代码:
// 面单颜色列表(十六进制格式) privatestaticreadonly List<string> LabelColors = new List<string> { "#7C7C7C", "#707070", "#5E5E5E", "#8F8F8D", "#5F5F5F", "#CBCBC9","#FFFFFF","#FEFEFE","#FCFCFC" ,"#7B7B7B","#828282","#7D7D7D","#787878","#D7D7D5","#777777","#7F7F7F" };
每次有不同颜色或者无法定位的面单,都需要人工补录面单的背景色HEX,那么能不能集成一个工具,自动吸取图片色号保存后,这里能立即生效呢?答案是肯定的!先看看动态效果图:
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点击取色,跟随鼠标实时显示背景色便于定位
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快捷键Alt+C,抓取当前鼠标所在背景色存储到列表并存储到根目录colorHistory.json文件,便于其他地方读取
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列表支持右键删除错误颜色(如下图)
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其他地方读取抓取的颜色列表
保存的json文件格式如下:
["#018DBE", "#B1C681", "#03231E", "#61CB81", "#00424A", "#B5BD68", "#A3D9A3", "#F68A1E", "#0E83BA", "#861B2D", "#059BBC" ]
每次抓取都会往json存储当前最新色号,然后其他地方实时读取json即可:
//// 面单颜色列表(十六进制格式)//private static readonly List<string> LabelColors = new List<string> //{ // "#7C7C7C", "#707070", "#5E5E5E", "#8F8F8D", "#5F5F5F", "#CBCBC9","#FFFFFF","#FEFEFE","#FCFCFC" ,"#7B7B7B","#828282","#7D7D7D","#787878","#D7D7D5","#777777","#7F7F7F" //}; static List<string> LabelColors = new List<string>(); privatestatic List<string> LoadColorList(){try{string historyFilePath = System.Windows.Forms.Application.StartupPath + @"\colorHistory.json";if (File.Exists(historyFilePath)){string json = File.ReadAllText(historyFilePath);var hexList = JsonSerializer.Deserialize<List<string>>(json);foreach (var hex in hexList){if (!string.IsNullOrEmpty(hex)){LabelColors.Add(hex);}}return LabelColors;}}catch (Exception ex){MessageBox.Show($"加载历史记录失败: {ex.Message}", "错误",MessageBoxButtons.OK, MessageBoxIcon.Error);}returnnull;}
private List<Color> colorHistory = new List<Color>();private MagnifierForm magnifierForm; privatestring historyFilePath = "colorHistory.json";private ContextMenuStrip historyContextMenu;
// 初始化右键菜单privatevoidInitializeContextMenu(){historyContextMenu = new ContextMenuStrip();ToolStripMenuItem deleteItem = new ToolStripMenuItem("删除选中颜色");deleteItem.Click += DeleteItem_Click;ToolStripMenuItem clearAllItem = new ToolStripMenuItem("清空所有历史");clearAllItem.Click += ClearAllItem_Click;ToolStripMenuItem copyItem = new ToolStripMenuItem("复制颜色值");copyItem.Click += CopyItem_Click;historyContextMenu.Items.AddRange(new ToolStripItem[] {copyItem, deleteItem, clearAllItem});lstHistory.ContextMenuStrip = historyContextMenu;LoadColorHistory();// 设置ListBox为自绘模式lstHistory.DrawMode = DrawMode.OwnerDrawFixed;lstHistory.DrawItem += LstHistory_DrawItem;}
ListBox实时显示当前吸取的背景色,重绘代码如下:
// 绘制ListBox项 privatevoidLstHistory_DrawItem(object sender, DrawItemEventArgs e){if (e.Index < 0 || e.Index >= colorHistory.Count) return;e.DrawBackground();Color color = colorHistory[e.Index];string text = $"{ColorToHex(color)} - RGB({color.R},{color.G},{color.B})";// 绘制颜色块Rectangle colorRect = new Rectangle(e.Bounds.Left + 2, e.Bounds.Top + 2, 20, e.Bounds.Height - 4);using (SolidBrush brush = new SolidBrush(color)){e.Graphics.FillRectangle(brush, colorRect);}e.Graphics.DrawRectangle(Pens.Black, colorRect);// 绘制文本Rectangle textRect = new Rectangle(e.Bounds.Left + 25, e.Bounds.Top, e.Bounds.Width - 25, e.Bounds.Height);using (SolidBrush textBrush = new SolidBrush(e.ForeColor)){e.Graphics.DrawString(text, e.Font, textBrush, textRect);}e.DrawFocusRectangle();}
RGB和HEX 相互转换
// HEX字符串转Colorprivate Color HexToColor(string hex){try{// 移除#号hex = hex.Replace("#", "");// 处理3位HEXif (hex.Length == 3){hex = $"{hex[0]}{hex[0]}{hex[1]}{hex[1]}{hex[2]}{hex[2]}";}// 处理6位HEXif (hex.Length == 6){byte r = Convert.ToByte(hex.Substring(0, 2), 16);byte g = Convert.ToByte(hex.Substring(2, 2), 16);byte b = Convert.ToByte(hex.Substring(4, 2), 16);return Color.FromArgb(r, g, b);}return Color.Empty;}catch{return Color.Empty;}}// 颜色转HEX privatestringColorToHex(Color color){return$"#{color.R:X2}{color.G:X2}{color.B:X2}";}
结束语
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