Owner Drawn Menu : MenuItem : GUI Windows Form C# Source Code

    

/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald

Publisher: Apress
ISBN: 1590590457
*/

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace OwnerDrawnMenu
{
  /// <summary>
  /// Summary description for OwnerDrawnMenu.
  /// </summary>
  public class OwnerDrawnMenu : System.Windows.Forms.Form
  {
    internal System.Windows.Forms.ImageList imgMenu;
    internal System.Windows.Forms.MainMenu mainMenu1;
    internal System.Windows.Forms.MenuItem mnuFile;
    internal System.Windows.Forms.MenuItem mnuNew;
    internal System.Windows.Forms.MenuItem mnuOpen;
    internal System.Windows.Forms.MenuItem mnuSave;
    private System.ComponentModel.IContainer components;

    public OwnerDrawnMenu()
    {
      //
      // Required for Windows Form Designer support
      //
      InitializeComponent();

      //
      // TODO: Add any constructor code after InitializeComponent call
      //
    }

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    protected override void Dispose( bool disposing )
    {
      if( disposing )
      {
        if (components != null) 
        {
          components.Dispose();
        }
      }
      base.Dispose( disposing );
    }

    #region Windows Form Designer generated code
    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
      this.components = new System.ComponentModel.Container();
      System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(OwnerDrawnMenu));
      this.imgMenu = new System.Windows.Forms.ImageList(this.components);
      this.mainMenu1 = new System.Windows.Forms.MainMenu();
      this.mnuFile = new System.Windows.Forms.MenuItem();
      this.mnuNew = new System.Windows.Forms.MenuItem();
      this.mnuOpen = new System.Windows.Forms.MenuItem();
      this.mnuSave = new System.Windows.Forms.MenuItem();
      // 
      // imgMenu
      // 
      this.imgMenu.ColorDepth = System.Windows.Forms.ColorDepth.Depth8Bit;
      this.imgMenu.ImageSize = new System.Drawing.Size(16, 16);
      this.imgMenu.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imgMenu.ImageStream")));
      this.imgMenu.TransparentColor = System.Drawing.Color.Transparent;
      // 
      // mainMenu1
      // 
      this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                            this.mnuFile});
      // 
      // mnuFile
      // 
      this.mnuFile.Index = 0;
      this.mnuFile.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                          this.mnuNew,
                                          this.mnuOpen,
                                          this.mnuSave});
      this.mnuFile.Text = "File";
      // 
      // mnuNew
      // 
      this.mnuNew.Index = 0;
      this.mnuNew.OwnerDraw = true;
      this.mnuNew.Text = "New";
      this.mnuNew.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.mnu_DrawItem);
      this.mnuNew.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.mnu_MeasureItem);
      // 
      // mnuOpen
      // 
      this.mnuOpen.Index = 1;
      this.mnuOpen.OwnerDraw = true;
      this.mnuOpen.Text = "Open";
      this.mnuOpen.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.mnu_DrawItem);
      this.mnuOpen.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.mnu_MeasureItem);
      // 
      // mnuSave
      // 
      this.mnuSave.Index = 2;
      this.mnuSave.OwnerDraw = true;
      this.mnuSave.Text = "Save";
      this.mnuSave.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.mnu_DrawItem);
      this.mnuSave.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.mnu_MeasureItem);
      // 
      // OwnerDrawnMenu
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 266);
      this.Menu = this.mainMenu1;
      this.Name = "OwnerDrawnMenu";
      this.Text = "Owner-Drawn Menu";

    }
    #endregion

    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main() 
    {
      Application.Run(new OwnerDrawnMenu());
    }

    private void mnu_MeasureItem(object sender, System.Windows.Forms.MeasureItemEventArgs e)
    {
      // Retrieve current item.
      MenuItem mnuItem = (MenuItem)sender;

      Font menuFont = new Font("Tahoma", 8);

      // Measure size needed to display text.
      // We add 30 pixels to the width to allow a generous spacing for the image.
      e.ItemHeight = (int)e.Graphics.MeasureString(mnuItem.Text, menuFont).Height + 5;
            e.ItemWidth = (int)e.Graphics.MeasureString(mnuItem.Text, menuFont).Width + 30;
    }

    private void mnu_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
    {
      // Retrieve current item.
      MenuItem mnuItem = (MenuItem)sender;
        
      // This defaults to the highlighted background if selected.
      e.DrawBackground();
            
      // Retrieve the image from an ImageList control.
      Image menuImage = imgMenu.Images[mnuItem.Index];
      
      // Draw the image.
      e.Graphics.DrawImage(menuImage, e.Bounds.Left + 3, e.Bounds.Top + 2);
      
      // Draw the text with the supplied colors and in the set region.
      e.Graphics.DrawString(mnuItem.Text, e.Font, new SolidBrush(e.ForeColor), e.Bounds.Left + 25, e.Bounds.Top + 3);
    }
  }
}