WPF TextBox 编辑框添加行号的2种方式 |
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WPF TextBox 编辑框添加行号的2种方式
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加上了自定义滚动条，下载代码看效果 1、TextBox不自动换行 这种方式处理最简单 下载： 链接：https://pan.baidu.com/s/1RViZ5F6ypf7WOzg4bBzHYw 提取码：9qvf using System; using System.Windows; using System.Windows.Controls; using System.Windows.Input; using System.Windows.Media; using System.Windows.Threading; public class TextBoxHelper { public Color BackgroundColor = Colors.White; // 背景色 public Color TextColor = Colors.Black; // 文字颜色 public Color LinecodeBackground = Colors.Gainsboro; // 显示行号背景色 public Color LinecodeColor = Colors.SteelBlue; // 显示行号文字色 public FontFamily fontFamily = new FontFamily("Microsoft YaHei"); // 字体 public double Fontsize = 12; // 字体大小 public double Line_Height = 20; // 行高度 public double Linecode_Width = 35; // 行号宽度 public double Linecode_Interval = 5; // 行号右侧间隔 public TextBox Editor; // TextBox组件 private ScrollTemplate scrollTemplate_TextBox; private Canvas Editor_Box; private Canvas Linenumber; private double per = 0; /// /// 带行号的TextBox /// /// 父容器 /// 位置 x /// 位置 y /// 宽度 /// 高度 public void LinenumberEditor(Canvas obj, double x, double y, double width, double height) { per = height; Editor_Box = new Canvas() { Width = width + Linecode_Width, Height = height, Background = new SolidColorBrush(BackgroundColor), Clip = new RectangleGeometry(new Rect(0, 0, width, height)) }; Canvas.SetLeft(Editor_Box, x); Canvas.SetTop(Editor_Box, y); Editor = new TextBox() { BorderThickness = new Thickness(0), AcceptsReturn = true, FontFamily = fontFamily, FontSize = Fontsize, AcceptsTab = true, Foreground = new SolidColorBrush(TextColor), Background =Brushes.Transparent }; Editor.PreviewKeyDown += Editor_PreviewKeyDown; Editor.TextChanged += Editor_TextChanged; TextBlock.SetLineHeight(Editor, Line_Height); Canvas.SetLeft(Editor, 30); WrapPanel text_panel = new WrapPanel() { Orientation = Orientation.Vertical, }; text_panel.Children.Add(Editor); scrollTemplate_TextBox = new ScrollTemplate(); scrollTemplate_TextBox.ScrollViewer.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto; scrollTemplate_TextBox.ScrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Auto; scrollTemplate_TextBox.ScrollViewer.Background = Brushes.WhiteSmoke; scrollTemplate_TextBox.InitializeScrollViewer(Editor_Box, text_panel, Linecode_Width, 0, width- Linecode_Width, height, ScrollViewer_Type.Effect); scrollTemplate_TextBox.ScrollViewer.ScrollChanged += (s, e) => { GeneralTransform generalTransform = Editor.TransformToAncestor(Editor_Box); Point point = generalTransform.Transform(new Point(0, 0)); Canvas.SetTop(Linenumber, point.Y); }; scrollTemplate_TextBox.ScrollViewer.PreviewMouseDown += (s, e) => { obj.Dispatcher.BeginInvoke(DispatcherPriority.Background, (Action)(() => { Keyboard.Focus(Editor); })); }; Linenumber = new Canvas() { Width = Linecode_Width, Height = height, Background = new SolidColorBrush(LinecodeBackground) }; Editor_Box.Children.Add(Linenumber); TextBlock Linecode = new TextBlock() { Height = Line_Height, Width = Linecode_Width - Linecode_Interval, TextAlignment = TextAlignment.Right, Text = "1", FontFamily = fontFamily, FontSize = Fontsize, Foreground = new SolidColorBrush(LinecodeColor), Background = Brushes.Transparent }; Linenumber.Children.Add(Linecode); Editor_Box.MouseDown += (s, e) => { Editor.Focus(); }; obj.Children.Add(Editor_Box); } private void Editor_PreviewKeyDown(object sender, KeyEventArgs e) { if (e.Key==Key.PageDown) { e.Handled = true; scrollTemplate_TextBox.ScrollViewer.ScrollToVerticalOffset(scrollTemplate_TextBox.ScrollViewer.VerticalOffset + per); } else if (e.Key == Key.PageUp) { e.Handled = true; scrollTemplate_TextBox.ScrollViewer.ScrollToVerticalOffset(scrollTemplate_TextBox.ScrollViewer.VerticalOffset - per); } } private void Editor_TextChanged(object sender, TextChangedEventArgs e) { if (Linenumber.Children.Count != Editor.LineCount) { if (Linenumber.Children.Count TextBlock Linecode = new TextBlock() { Height = Line_Height, Width = Linecode_Width - Linecode_Interval, TextAlignment = TextAlignment.Right, FontFamily = fontFamily, FontSize = Fontsize, Foreground = new SolidColorBrush(LinecodeColor), Background = Brushes.Transparent }; Canvas.SetTop(Linecode, i * Line_Height); Linenumber.Children.Add(Linecode); } } else if (Linenumber.Children.Count > Editor.LineCount) { for (int i = Linenumber.Children.Count-1 ; i > Editor.LineCount - 1; i--) { Linenumber.Children.RemoveAt(i); } } for (int i = 0; i (Linenumber.Children[i] as TextBlock).Text = (i + 1).ToString(); } Linenumber.Height = Editor.LineCount* Line_Height Editor_Box = new Canvas() { Width = width + Linecode_Width, Height = height, Background = new SolidColorBrush(BackgroundColor), Clip = new RectangleGeometry(new Rect(0, 0, width, height)) }; Canvas.SetLeft(Editor_Box, x); Canvas.SetTop(Editor_Box, y); Editor = new TextBox() { Width = width - Linecode_Width, BorderThickness = new Thickness(0), TextWrapping = TextWrapping.Wrap, AcceptsReturn = true, FontFamily = fontFamily, FontSize = Fontsize, Foreground = new SolidColorBrush(TextColor), Background =Brushes.Transparent }; Editor.TextChanged += Editor_TextChanged; TextBlock.SetLineHeight(Editor, Line_Height); Canvas.SetLeft(Editor, 30); WrapPanel text_panel = new WrapPanel() { Width = Editor.Width, Orientation = Orientation.Vertical, }; text_panel.Children.Add(Editor); scrollTemplate_TextBox = new ScrollTemplate(); scrollTemplate_TextBox.ScrollViewer.Background = Brushes.WhiteSmoke; scrollTemplate_TextBox.InitializeScrollViewer(Editor_Box, text_panel, Linecode_Width, 0, width- Linecode_Width, height, ScrollViewer_Type.Win10); scrollTemplate_TextBox.ScrollViewer.ScrollChanged += (s, e) => { GeneralTransform generalTransform = Editor.TransformToAncestor(Editor_Box); Point point = generalTransform.Transform(new Point(0, 0)); Canvas.SetTop(Linenumber, point.Y); }; scrollTemplate_TextBox.ScrollViewer.PreviewMouseDown += (s, e) => { obj.Dispatcher.BeginInvoke(DispatcherPriority.Background, (Action)(() => { Keyboard.Focus(Editor); })); }; Linenumber = new Canvas() { Width = Linecode_Width, Height = height, Background = new SolidColorBrush(LinecodeBackground) }; Editor_Box.Children.Add(Linenumber); TextBlock Linecode = new TextBlock() { Height = Line_Height, Width = Linecode_Width - Linecode_Interval, TextAlignment = TextAlignment.Right, Text = "1", FontFamily = fontFamily, FontSize = Fontsize, Foreground = new SolidColorBrush(LinecodeColor), Background = Brushes.Transparent }; Linenumber.Children.Add(Linecode); Linemeasure = new TextBox() { Width = width - Linecode_Width, Height = 100, TextWrapping = TextWrapping.Wrap, BorderThickness = new Thickness(0), FontFamily = fontFamily, FontSize = Fontsize, Visibility = Visibility.Hidden }; Canvas.SetLeft(Linemeasure, -x); Canvas.SetTop(Linemeasure, -1); obj.Children.Add(Linemeasure); Editor_Box.MouseDown += (s, e) => { Editor.Focus(); }; obj.Children.Add(Editor_Box); } private void Editor_TextChanged(object sender, TextChangedEventArgs e) { if (Linenumber.Children.Count != Editor.LineCount) { if (Linenumber.Children.Count TextBlock Linecode = new TextBlock() { Height = Line_Height, Width = Linecode_Width - Linecode_Interval, TextAlignment = TextAlignment.Right, FontFamily = fontFamily, FontSize = Fontsize, Foreground = new SolidColorBrush(LinecodeColor), Background = Brushes.Transparent }; Canvas.SetTop(Linecode, i * Line_Height); Linenumber.Children.Add(Linecode); } } else if (Linenumber.Children.Count > Editor.LineCount) { for (int i = Linenumber.Children.Count-1 ; i > Editor.LineCount - 1; i--) { Linenumber.Children.RemoveAt(i); } } for (int i = 0; i "\r\n" }, StringSplitOptions.None); int line = 0; for (int i = 0; i |
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