RichTextBox.Focus() : RichTextBox « System.Windows.Forms

  





using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Windows.Forms;







class Form1 : Form {

    public Form1() {

        InitializeComponent();

    }



    private void buttonBold_Click(object sender, EventArgs e) {

        Font oldFont;

        Font newFont;



        oldFont = this.richTextBoxText.SelectionFont;





        if (oldFont.Bold)

            newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Bold);

        else

            newFont = new Font(oldFont, oldFont.Style | FontStyle.Bold);





        this.richTextBoxText.SelectionFont = newFont;

        this.richTextBoxText.Focus();

    }



    private void buttonUnderline_Click(object sender, EventArgs e) {

        Font oldFont;

        Font newFont;





        oldFont = this.richTextBoxText.SelectionFont;

        if (oldFont.Underline)

            newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Underline);

        else

            newFont = new Font(oldFont, oldFont.Style | FontStyle.Underline);



        this.richTextBoxText.SelectionFont = newFont;

        this.richTextBoxText.Focus();

    }



    private void buttonItalic_Click(object sender, EventArgs e) {

        Font oldFont;

        Font newFont;



        oldFont = this.richTextBoxText.SelectionFont;



        if (oldFont.Italic)

            newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Italic);

        else

            newFont = new Font(oldFont, oldFont.Style | FontStyle.Italic);



        this.richTextBoxText.SelectionFont = newFont;

        this.richTextBoxText.Focus();

    }



    private void buttonCenter_Click(object sender, EventArgs e) {

        if (this.richTextBoxText.SelectionAlignment == HorizontalAlignment.Center)

            this.richTextBoxText.SelectionAlignment = HorizontalAlignment.Left;

        else



            this.richTextBoxText.SelectionAlignment = HorizontalAlignment.Center;

        this.richTextBoxText.Focus();

    }



    private void textBoxSize_KeyPress(object sender, KeyPressEventArgs e) {

        if ((e.KeyChar < 48 || e.KeyChar > 57) &&

                                               e.KeyChar != 8 && e.KeyChar != 13) {

            e.Handled = true;

        } else if (e.KeyChar == 13) {

            TextBox txt = (TextBox)sender;



            if (txt.Text.Length > 0)

                ApplyTextSize(txt.Text);

            e.Handled = true;

            this.richTextBoxText.Focus();

        }

    }



    private void textBoxSize_Validating(object sender, CancelEventArgs e) {

        TextBox txt = (TextBox)sender;



        ApplyTextSize(txt.Text);

        this.richTextBoxText.Focus();

    }



    private void ApplyTextSize(string textSize) {

        float newSize = Convert.ToSingle(textSize);

        FontFamily currentFontFamily;

        Font newFont;



        currentFontFamily = this.richTextBoxText.SelectionFont.FontFamily;

        newFont = new Font(currentFontFamily, newSize);



        this.richTextBoxText.SelectionFont = newFont;

    }



    private void richTextBoxText_LinkClicked(object sender, LinkClickedEventArgs e) {

        System.Diagnostics.Process.Start(e.LinkText);

    }



    private void buttonLoad_Click(object sender, EventArgs e) {

        try {

            richTextBoxText.LoadFile("Test.rtf");

        } catch (System.IO.FileNotFoundException) {

            MessageBox.Show("No file to load yet");

        }

    }



    private void buttonSave_Click(object sender, EventArgs e) {

        try {

            richTextBoxText.SaveFile("Test.rtf");

        } catch (System.Exception err) {

            MessageBox.Show(err.Message);

        }

    }

    private void InitializeComponent() {

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

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

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

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

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

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

        this.labelSize = new System.Windows.Forms.Label();

        this.textBoxSize = new System.Windows.Forms.TextBox();

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

        this.SuspendLayout();



        this.buttonBold.Anchor = System.Windows.Forms.AnchorStyles.Top;

        this.buttonBold.Location = new System.Drawing.Point(187, 13);

        this.buttonBold.Margin = new System.Windows.Forms.Padding(3, 3, 3, 1);

        this.buttonBold.Name = "buttonBold";

        this.buttonBold.Size = new System.Drawing.Size(82, 23);

        this.buttonBold.TabIndex = 0;

        this.buttonBold.Text = "Bold";

        this.buttonBold.Click += new System.EventHandler(this.buttonBold_Click);



        this.buttonUnderline.Anchor = System.Windows.Forms.AnchorStyles.Top;

        this.buttonUnderline.Location = new System.Drawing.Point(276, 13);

        this.buttonUnderline.Margin = new System.Windows.Forms.Padding(3, 3, 3, 1);

        this.buttonUnderline.Name = "buttonUnderline";

        this.buttonUnderline.Size = new System.Drawing.Size(82, 23);

        this.buttonUnderline.TabIndex = 1;

        this.buttonUnderline.Text = "Underline";

        this.buttonUnderline.Click += new System.EventHandler(this.buttonUnderline_Click);



        this.buttonItalic.Anchor = System.Windows.Forms.AnchorStyles.Top;

        this.buttonItalic.Location = new System.Drawing.Point(365, 13);

        this.buttonItalic.Name = "buttonItalic";

        this.buttonItalic.Size = new System.Drawing.Size(82, 23);

        this.buttonItalic.TabIndex = 2;

        this.buttonItalic.Text = "Italic";

        this.buttonItalic.Click += new System.EventHandler(this.buttonItalic_Click);



        this.buttonCenter.Anchor = System.Windows.Forms.AnchorStyles.Top;

        this.buttonCenter.Location = new System.Drawing.Point(454, 13);

        this.buttonCenter.Margin = new System.Windows.Forms.Padding(3, 0, 3, 3);

        this.buttonCenter.Name = "buttonCenter";

        this.buttonCenter.Size = new System.Drawing.Size(82, 23);

        this.buttonCenter.TabIndex = 3;

        this.buttonCenter.Text = "Center";

        this.buttonCenter.Click += new System.EventHandler(this.buttonCenter_Click);



        this.buttonSave.Anchor = System.Windows.Forms.AnchorStyles.Bottom;

        this.buttonSave.Location = new System.Drawing.Point(365, 309);

        this.buttonSave.Margin = new System.Windows.Forms.Padding(3, 0, 3, 3);

        this.buttonSave.Name = "buttonSave";

        this.buttonSave.Size = new System.Drawing.Size(82, 23);

        this.buttonSave.TabIndex = 4;

        this.buttonSave.Text = "Save";

        this.buttonSave.Click += new System.EventHandler(this.buttonSave_Click);



        this.buttonLoad.Anchor = System.Windows.Forms.AnchorStyles.Bottom;

        this.buttonLoad.Location = new System.Drawing.Point(276, 309);

        this.buttonLoad.Name = "buttonLoad";

        this.buttonLoad.Size = new System.Drawing.Size(82, 23);

        this.buttonLoad.TabIndex = 5;

        this.buttonLoad.Text = "Load";

        this.buttonLoad.Click += new System.EventHandler(this.buttonLoad_Click);



        this.labelSize.Anchor = System.Windows.Forms.AnchorStyles.Top;

        this.labelSize.AutoSize = true;

        this.labelSize.Location = new System.Drawing.Point(295, 46);

        this.labelSize.Name = "labelSize";

        this.labelSize.Size = new System.Drawing.Size(26, 14);

        this.labelSize.TabIndex = 6;

        this.labelSize.Text = "Size";



        this.textBoxSize.Anchor = System.Windows.Forms.AnchorStyles.Top;

        this.textBoxSize.Location = new System.Drawing.Point(328, 43);

        this.textBoxSize.Name = "textBoxSize";

        this.textBoxSize.TabIndex = 7;

        this.textBoxSize.Text = "10";

        this.textBoxSize.Validating += new System.ComponentModel.CancelEventHandler(this.textBoxSize_Validating);

        this.textBoxSize.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBoxSize_KeyPress);



        this.richTextBoxText.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.richTextBoxText.Location = new System.Drawing.Point(13, 70);

        this.richTextBoxText.Name = "richTextBoxText";

        this.richTextBoxText.Size = new System.Drawing.Size(686, 232);

        this.richTextBoxText.TabIndex = 8;

        this.richTextBoxText.Text = "";

        this.richTextBoxText.LinkClicked += new System.Windows.Forms.LinkClickedEventHandler(this.richTextBoxText_LinkClicked);



        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

        this.ClientSize = new System.Drawing.Size(722, 341);

        this.Controls.Add(this.richTextBoxText);

        this.Controls.Add(this.textBoxSize);

        this.Controls.Add(this.labelSize);

        this.Controls.Add(this.buttonLoad);

        this.Controls.Add(this.buttonSave);

        this.Controls.Add(this.buttonCenter);

        this.Controls.Add(this.buttonItalic);

        this.Controls.Add(this.buttonUnderline);

        this.Controls.Add(this.buttonBold);

        this.MinimumSize = new System.Drawing.Size(730, 368);

        this.Name = "Form1";

        this.Text = "RichTextBox Test";

        this.ResumeLayout(false);

        this.PerformLayout();



    }







    private System.Windows.Forms.Button buttonBold;

    private System.Windows.Forms.Button buttonUnderline;

    private System.Windows.Forms.Button buttonItalic;

    private System.Windows.Forms.Button buttonCenter;

    private System.Windows.Forms.Button buttonSave;

    private System.Windows.Forms.Button buttonLoad;

    private System.Windows.Forms.Label labelSize;

    private System.Windows.Forms.TextBox textBoxSize;

    private System.Windows.Forms.RichTextBox richTextBoxText;



    [STAThread]

    static void Main() {

        Application.EnableVisualStyles();

        Application.Run(new Form1());

    }



}
RichTextBox.Focus() : RichTextBox « System.Windows.Forms « C# / C Sharp by API
