NEU

FastColoredTextBox/Ruler.cs

@@ -0,0 +1,138 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Drawing;
+using System.Data;
+using System.Drawing.Drawing2D;
+using System.Text;
+using System.Windows.Forms;
+
+namespace FastColoredTextBoxNS
+{
+    public partial class Ruler : UserControl
+    {
+        public EventHandler TargetChanged;
+
+        [DefaultValue(typeof(Color), "ControlLight")]
+        public Color BackColor2 { get; set; }
+
+        [DefaultValue(typeof(Color), "DarkGray")]
+        public Color TickColor { get; set; }
+
+        [DefaultValue(typeof(Color), "Black")]
+        public Color CaretTickColor { get; set; }
+
+        FastColoredTextBox target;
+
+        [Description("Target FastColoredTextBox")]
+        public FastColoredTextBox Target
+        {
+            get { return target; }
+            set
+            {
+                if (target != null)
+                    UnSubscribe(target);
+                target = value;
+                Subscribe(target);
+                OnTargetChanged();
+            }
+        }
+
+        public Ruler()
+        {
+            InitializeComponent();
+
+            SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.UserPaint, true);
+            MinimumSize = new Size(0, 24);
+            MaximumSize = new Size(int.MaxValue/2, 24);
+
+            BackColor2 = SystemColors.ControlLight;
+            TickColor = Color.DarkGray;
+            CaretTickColor = Color.Black;
+        }
+
+
+
+        protected virtual void OnTargetChanged()
+        {
+            if (TargetChanged != null)
+                TargetChanged(this, EventArgs.Empty);
+        }
+
+        protected virtual void UnSubscribe(FastColoredTextBox target)
+        {
+            target.Scroll -= new ScrollEventHandler(target_Scroll);
+            target.SelectionChanged -= new EventHandler(target_SelectionChanged);
+            target.VisibleRangeChanged -= new EventHandler(target_VisibleRangeChanged);
+        }
+
+        protected virtual void Subscribe(FastColoredTextBox target)
+        {
+            target.Scroll += new ScrollEventHandler(target_Scroll);
+            target.SelectionChanged += new EventHandler(target_SelectionChanged);
+            target.VisibleRangeChanged += new EventHandler(target_VisibleRangeChanged);
+        }
+
+        void target_VisibleRangeChanged(object sender, EventArgs e)
+        {
+            Invalidate();
+        }
+
+        void target_SelectionChanged(object sender, EventArgs e)
+        {
+            Invalidate();
+        }
+
+        protected virtual void target_Scroll(object sender, ScrollEventArgs e)
+        {
+            Invalidate();
+        }
+
+        protected override void OnResize(EventArgs e)
+        {
+            base.OnResize(e);
+            Invalidate();
+        }
+
+        protected override void OnPaint(PaintEventArgs e)
+        {
+            if (target == null)
+                return;
+
+            Point car = PointToClient(target.PointToScreen(target.PlaceToPoint(target.Selection.Start)));
+
+            Size fontSize = TextRenderer.MeasureText("W", Font);
+
+            int column = 0;
+            e.Graphics.FillRectangle(new LinearGradientBrush(new Rectangle(0, 0, Width, Height), BackColor, BackColor2, 270), new Rectangle(0, 0, Width, Height));
+
+            float columnWidth = target.CharWidth;
+            var sf = new StringFormat();
+            sf.Alignment = StringAlignment.Center;
+            sf.LineAlignment = StringAlignment.Near;
+
+            var zeroPoint = target.PositionToPoint(0);
+            zeroPoint = PointToClient(target.PointToScreen(zeroPoint));
+
+            using (var pen = new Pen(TickColor))
+            using (var textBrush = new SolidBrush(ForeColor))
+            for (float x = zeroPoint.X; x < Right; x += columnWidth, ++column)
+            {
+                if (column % 10 == 0)
+                    e.Graphics.DrawString(column.ToString(), Font, textBrush, x, 0f, sf);
+
+                e.Graphics.DrawLine(pen, (int)x, fontSize.Height + (column % 5 == 0 ? 1 : 3), (int)x, Height - 4);
+            }
+
+            using (var pen = new Pen(TickColor))
+                e.Graphics.DrawLine(pen, new Point(car.X - 3, Height - 3), new Point(car.X + 3, Height - 3));
+
+            using (var pen = new Pen(CaretTickColor))
+            {
+                e.Graphics.DrawLine(pen, new Point(car.X - 2, fontSize.Height + 3), new Point(car.X - 2, Height - 4));
+                e.Graphics.DrawLine(pen, new Point(car.X, fontSize.Height + 1), new Point(car.X, Height - 4));
+                e.Graphics.DrawLine(pen, new Point(car.X + 2, fontSize.Height + 3), new Point(car.X + 2, Height - 4));
+            }
+        }
+    }
+}