RichTextBox.SelectionChanged : RichTextBox « System.Windows.Forms

   





using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.IO;

using System.Drawing.Text;



public class Form1 : Form

{

    private System.Windows.Forms.RichTextBox richTextBox1;

    private System.Windows.Forms.ToolStrip toolStrip1;

    private System.Windows.Forms.ToolStripButton cmdUnderline;

    private System.Windows.Forms.ToolStripButton cmdBold;

    private System.Windows.Forms.ToolStripButton cmdItalic;

    private System.Windows.Forms.ToolStripSeparator toolStripSeparator1;

    private System.Windows.Forms.ToolStripDropDownButton lstColors;

    private System.Windows.Forms.ToolStripDropDownButton lstFonts;

    private System.Windows.Forms.ToolStripDropDownButton lstZoom;

    private System.Windows.Forms.ToolStripDropDownButton lstFontSize;

    private System.Windows.Forms.ToolStripSeparator toolStripSeparator2;

    private System.Windows.Forms.Button cmdAddImage;



  public Form1() {

        InitializeComponent();

  }

    private void richTextBox1_SelectionChanged(object sender, EventArgs e)

    {

        if (richTextBox1.SelectionFont != null)

        {

            cmdBold.Checked = richTextBox1.SelectionFont.Bold;

            cmdItalic.Checked = richTextBox1.SelectionFont.Italic;

            cmdUnderline.Checked = richTextBox1.SelectionFont.Underline;

        }

    }



    private void cmdBold_Click(object sender, EventArgs e)

    {

        if (richTextBox1.SelectionFont == null)

        {

            return;

        }



        FontStyle style = richTextBox1.SelectionFont.Style;

        

        if (richTextBox1.SelectionFont.Bold)

        {

            style &= ~FontStyle.Bold;

        }

        else

        {

            style |= FontStyle.Bold;

            

        }

        richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style);

    }



    private void cmdItalic_Click(object sender, EventArgs e)

    {

        if (richTextBox1.SelectionFont == null)

        {

            return;

        }

        FontStyle style = richTextBox1.SelectionFont.Style;



        if (richTextBox1.SelectionFont.Italic)

        {

            style &= ~FontStyle.Italic;

        }

        else

        {

            style |= FontStyle.Italic;

        }

        richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style);

    }



    private void cmdUnderline_Click(object sender, EventArgs e)

    {

        if (richTextBox1.SelectionFont == null)

        {

            return;

        }



        FontStyle style = richTextBox1.SelectionFont.Style;



        if (richTextBox1.SelectionFont.Underline)

        {

            style &= ~FontStyle.Underline;

        }

        else

        {

            style |= FontStyle.Underline;

        }

        richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style);

    }



    private void Form1_Load(object sender, EventArgs e)

    {

        lstColors.DropDown.Items.Add("Red");

        lstColors.DropDown.Items.Add("Blue");

        

        InstalledFontCollection fonts = new InstalledFontCollection();

        foreach (FontFamily family in fonts.Families)

        {

            lstFonts.DropDown.Items.Add(family.Name);

        }



        lstZoom.DropDown.Items.Add("300%");             

        lstZoom.DropDown.Items.Add("200%");             

        lstZoom.DropDown.Items.Add("100%");             



        lstFontSize.DropDown.Items.Add("8");

        lstFontSize.DropDown.Items.Add("10");

        lstFontSize.DropDown.Items.Add("12");

    }



   

    private void lstColors_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e)

    {

        

      KnownColor selectedColor;

      selectedColor = (KnownColor)System.Enum.Parse(typeof(KnownColor), e.ClickedItem.Text);



        richTextBox1.SelectionColor = Color.FromKnownColor(selectedColor);

    }



    private void lstFonts_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e)

    {

        if (richTextBox1.SelectionFont == null)

        {

            richTextBox1.SelectionFont = new Font(e.ClickedItem.Text, richTextBox1.Font.Size);

        }

        richTextBox1.SelectionFont = new Font(e.ClickedItem.Text, richTextBox1.SelectionFont.Size);

    }



    private void lstZoom_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e)

    {            

        float zoomPercent = Convert.ToSingle(e.ClickedItem.Text.Trim('%'));

        richTextBox1.ZoomFactor = zoomPercent / 100;

    }



    private void lstFontSize_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e)

    {

        if (richTextBox1.SelectionFont == null)

        {

            return;

        }

        richTextBox1.SelectionFont =new Font(richTextBox1.SelectionFont.FontFamily,

            Convert.ToInt32(e.ClickedItem.Text),

            richTextBox1.SelectionFont.Style);

    }



     private void cmdAddImage_Click(object sender, EventArgs e)

    {

         Image img = Image.FromFile("winter.jpg");

         Clipboard.SetImage(img);

         

         richTextBox1.SelectionStart = 0;

         richTextBox1.Paste();



         Clipboard.Clear();

    }



    private void InitializeComponent()

    {

        this.richTextBox1 = new System.Windows.Forms.RichTextBox();

        this.toolStrip1 = new System.Windows.Forms.ToolStrip();

        this.cmdBold = new System.Windows.Forms.ToolStripButton();

        this.cmdItalic = new System.Windows.Forms.ToolStripButton();

        this.cmdUnderline = new System.Windows.Forms.ToolStripButton();

        this.toolStripSeparator1 = new System.Windows.Forms.ToolStripSeparator();

        this.lstColors = new System.Windows.Forms.ToolStripDropDownButton();

        this.lstFonts = new System.Windows.Forms.ToolStripDropDownButton();

        this.lstFontSize = new System.Windows.Forms.ToolStripDropDownButton();

        this.toolStripSeparator2 = new System.Windows.Forms.ToolStripSeparator();

        this.lstZoom = new System.Windows.Forms.ToolStripDropDownButton();

        this.cmdAddImage = new System.Windows.Forms.Button();

        this.toolStrip1.SuspendLayout();

        this.SuspendLayout();

        // 

        // richTextBox1

        // 

        this.richTextBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)

                    | System.Windows.Forms.AnchorStyles.Left)

                    | System.Windows.Forms.AnchorStyles.Right)));

        this.richTextBox1.BulletIndent = 5;

        this.richTextBox1.Location = new System.Drawing.Point(12, 37);

        this.richTextBox1.Margin = new System.Windows.Forms.Padding(5);

        this.richTextBox1.Name = "richTextBox1";

        this.richTextBox1.Size = new System.Drawing.Size(317, 197);

        this.richTextBox1.TabIndex = 0;

        this.richTextBox1.Text = "adfasdf";

        this.richTextBox1.SelectionChanged += new System.EventHandler(this.richTextBox1_SelectionChanged);

        // 

        // toolStrip1

        // 

        this.toolStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {

        this.cmdBold,

        this.cmdItalic,

        this.cmdUnderline,

        this.toolStripSeparator1,

        this.lstColors,

        this.lstFonts,

        this.lstFontSize,

        this.toolStripSeparator2,

        this.lstZoom});

        this.toolStrip1.Location = new System.Drawing.Point(0, 0);

        this.toolStrip1.Name = "toolStrip1";

        this.toolStrip1.Size = new System.Drawing.Size(341, 25);

        this.toolStrip1.TabIndex = 1;

        this.toolStrip1.Text = "toolStrip1";

        // 

        // cmdBold

        // 

        this.cmdBold.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;

        this.cmdBold.ImageTransparentColor = System.Drawing.Color.Magenta;

        this.cmdBold.Name = "cmdBold";

        this.cmdBold.Size = new System.Drawing.Size(31, 22);

        this.cmdBold.Text = "Bold";

        this.cmdBold.Click += new System.EventHandler(this.cmdBold_Click);

        // 

        // cmdItalic

        // 

        this.cmdItalic.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;

        this.cmdItalic.ImageTransparentColor = System.Drawing.Color.Magenta;

        this.cmdItalic.Name = "cmdItalic";

        this.cmdItalic.Size = new System.Drawing.Size(34, 22);

        this.cmdItalic.Text = "Italic";

        this.cmdItalic.Click += new System.EventHandler(this.cmdItalic_Click);

        // 

        // cmdUnderline

        // 

        this.cmdUnderline.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;

        this.cmdUnderline.ImageTransparentColor = System.Drawing.Color.Magenta;

        this.cmdUnderline.Name = "cmdUnderline";

        this.cmdUnderline.Size = new System.Drawing.Size(56, 22);

        this.cmdUnderline.Text = "Underline";

        this.cmdUnderline.Click += new System.EventHandler(this.cmdUnderline_Click);

        // 

        // toolStripSeparator1

        // 

        this.toolStripSeparator1.Name = "toolStripSeparator1";

        this.toolStripSeparator1.Size = new System.Drawing.Size(6, 25);

        // 

        // lstColors

        // 

        this.lstColors.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;

        this.lstColors.ImageTransparentColor = System.Drawing.Color.Magenta;

        this.lstColors.Name = "lstColors";

        this.lstColors.Size = new System.Drawing.Size(45, 22);

        this.lstColors.Text = "Color";

        this.lstColors.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstColors_DropDownItemClicked);

        // 

        // lstFonts

        // 

        this.lstFonts.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;

        this.lstFonts.ImageTransparentColor = System.Drawing.Color.Magenta;

        this.lstFonts.Name = "lstFonts";

        this.lstFonts.Size = new System.Drawing.Size(42, 22);

        this.lstFonts.Text = "Font";

        this.lstFonts.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstFonts_DropDownItemClicked);

        // 

        // lstFontSize

        // 

        this.lstFontSize.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;

        this.lstFontSize.ImageTransparentColor = System.Drawing.Color.Magenta;

        this.lstFontSize.Name = "lstFontSize";

        this.lstFontSize.Size = new System.Drawing.Size(39, 22);

        this.lstFontSize.Text = "Size";

        this.lstFontSize.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstFontSize_DropDownItemClicked);

        // 

        // toolStripSeparator2

        // 

        this.toolStripSeparator2.Name = "toolStripSeparator2";

        this.toolStripSeparator2.Size = new System.Drawing.Size(6, 25);

        // 

        // lstZoom

        // 

        this.lstZoom.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text;

        this.lstZoom.ImageTransparentColor = System.Drawing.Color.Magenta;

        this.lstZoom.Name = "lstZoom";

        this.lstZoom.Size = new System.Drawing.Size(46, 22);

        this.lstZoom.Text = "Zoom";

        this.lstZoom.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstZoom_DropDownItemClicked);

        // 

        // cmdAddImage

        // 

        this.cmdAddImage.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));

        this.cmdAddImage.Location = new System.Drawing.Point(12, 237);

        this.cmdAddImage.Name = "cmdAddImage";

        this.cmdAddImage.Size = new System.Drawing.Size(154, 23);

        this.cmdAddImage.TabIndex = 2;

        this.cmdAddImage.Text = "Insert Image";

        this.cmdAddImage.UseVisualStyleBackColor = true;

        this.cmdAddImage.Click += new System.EventHandler(this.cmdAddImage_Click);

        // 

        // Form1

        // 

        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);

        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

        this.ClientSize = new System.Drawing.Size(341, 266);

        this.Controls.Add(this.cmdAddImage);

        this.Controls.Add(this.toolStrip1);

        this.Controls.Add(this.richTextBox1);

        this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

        this.Name = "Form1";

        this.Text = "RichTextBox Test";

        this.Load += new System.EventHandler(this.Form1_Load);

        this.toolStrip1.ResumeLayout(false);

        this.toolStrip1.PerformLayout();

        this.ResumeLayout(false);

        this.PerformLayout();



    }



  [STAThread]

  static void Main()

  {

    Application.EnableVisualStyles();

    Application.Run(new Form1());

  }



}
RichTextBox.SelectionChanged : RichTextBox « System.Windows.Forms « C# / C Sharp by API
