Set Line Indexing

Set Line Indexing in Textbox

DenebStudio/DenebStudio/DenebStudio.cs

@@ -17,14 +17,16 @@ public partial class DenebStudio : MaterialForm
         public DenebStudio()
         {
             InitializeComponent();
+            InitializeMaterialTheme();
         }
 
         private void InitializeMaterialTheme()
         {
             var materialSkinManager = MaterialSkinManager.Instance;
             materialSkinManager.AddFormToManage(this);
             materialSkinManager.Theme = MaterialSkinManager.Themes.LIGHT;
-            materialSkinManager.ColorScheme = new ColorScheme(Primary.BlueGrey800, Primary.BlueGrey900, Primary.BlueGrey500, Accent.LightBlue200, TextShade.WHITE);
+            materialSkinManager.ColorScheme = new ColorScheme(Primary.Blue800, Primary.Blue900, Primary.Blue500, Accent.LightBlue200, TextShade.WHITE);
         }
+
     }
 }

DenebStudio/DenebStudio/DenebStudio.csproj

@@ -55,11 +55,20 @@
     <Compile Include="DenebStudio.Designer.cs">
       <DependentUpon>DenebStudio.cs</DependentUpon>
     </Compile>
+    <Compile Include="IndexedTextbox.cs">
+      <SubType>UserControl</SubType>
+    </Compile>
+    <Compile Include="IndexedTextbox.Designer.cs">
+      <DependentUpon>IndexedTextbox.cs</DependentUpon>
+    </Compile>
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <EmbeddedResource Include="DenebStudio.resx">
       <DependentUpon>DenebStudio.cs</DependentUpon>
     </EmbeddedResource>
+    <EmbeddedResource Include="IndexedTextbox.resx">
+      <DependentUpon>IndexedTextbox.cs</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="Properties\Resources.resx">
       <Generator>ResXFileCodeGenerator</Generator>
       <LastGenOutput>Resources.Designer.cs</LastGenOutput>

DenebStudio/DenebStudio/DenebStudio.resx

@@ -117,4 +117,7 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
+  <metadata name="materialContextMenuStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
 </root>

DenebStudio/DenebStudio/IndexedTextbox.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Drawing;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace DenebStudioControls
+{
+    public partial class IndexedTextbox : UserControl
+    {
+        public IndexedTextbox()
+        {
+            InitializeComponent();
+
+            numberLabel.Font = new Font(richTextBox1.Font.FontFamily, richTextBox1.Font.Size);
+        }
+
+        private void updateNumberLabel()
+        {
+            //we get index of first visible char and number of first visible line
+            Point pos = new Point(0, 0);
+            int firstIndex = richTextBox1.GetCharIndexFromPosition(pos);
+            int firstLine = richTextBox1.GetLineFromCharIndex(firstIndex);
+
+            //now we get index of last visible char and number of last visible line
+            pos.X = ClientRectangle.Width;
+            pos.Y = ClientRectangle.Height;
+            int lastIndex = richTextBox1.GetCharIndexFromPosition(pos);
+            int lastLine = richTextBox1.GetLineFromCharIndex(lastIndex);
+
+            //this is point position of last visible char, we'll use its Y value for calculating numberLabel size
+            pos = richTextBox1.GetPositionFromCharIndex(lastIndex);
+
+
+            //finally, renumber label
+            numberLabel.Text = "";
+            for (int i = firstLine; i <= lastLine + 1; i++)
+            {
+                numberLabel.Text += i + 1 + "\n";
+            }
+
+        }
+
+        private void richTextBox1_TextChanged(object sender, EventArgs e)
+        {
+            updateNumberLabel();
+        }
+
+        private void richTextBox1_VScroll(object sender, EventArgs e)
+        {
+            //move location of numberLabel for amount of pixels caused by scrollbar
+            int d = richTextBox1.GetPositionFromCharIndex(0).Y % (richTextBox1.Font.Height + 1);
+            numberLabel.Location = new Point(0, d);
+
+            updateNumberLabel();
+        }
+
+        private void richTextBox1_Resize(object sender, EventArgs e)
+        {
+            richTextBox1_VScroll(null, null);
+        }
+
+        private void richTextBox1_FontChanged(object sender, EventArgs e)
+        {
+            updateNumberLabel();
+            richTextBox1_VScroll(null, null);
+        }
+    }
+}