Mega Code Archive
Scribble
<![CDATA[
/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury,
Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace Scribble
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class frmScribble : System.Windows.Forms.Form
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
private bool mouseDown = false;
private Point lastPoint = Point.Empty;
private string color = "black";
private Graphics g;
private Pen p;
public frmScribble()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
g = CreateGraphics();
p = new Pen(Color.FromName(color));
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
g.Dispose();
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
protected override void OnMouseDown(MouseEventArgs e)
{
mouseDown = true;
if(e.Button==MouseButtons.Right)
{
ContextMenu m = new ContextMenu();
m.MenuItems.Add(0, new MenuItem("black", new EventHandler(RightMouseButton_Click)));
m.MenuItems.Add(1, new MenuItem("white", new EventHandler(RightMouseButton_Click)));
m.MenuItems.Add(2, new MenuItem("red", new EventHandler(RightMouseButton_Click)));
m.MenuItems.Add(3, new MenuItem("green", new EventHandler(RightMouseButton_Click)));
m.MenuItems.Add(4, new MenuItem("blue", new EventHandler(RightMouseButton_Click)));
m.Show(this, new Point(e.X, e.Y));
}
}
protected void RightMouseButton_Click(object sender, EventArgs e)
{
color = ((MenuItem)sender).Text;
p = new Pen(Color.FromName(color));
}
protected override void OnMouseUp(MouseEventArgs e)
{
mouseDown = false;
}
protected override void OnMouseMove(MouseEventArgs e)
{
if(lastPoint.Equals(Point.Empty)) lastPoint = new Point(e.X, e.Y);
if(mouseDown)
{
Point pMousePos = new Point(e.X, e.Y);
g.DrawLine(p, pMousePos, lastPoint);
}
lastPoint = new Point(e.X, e.Y);
}
#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()
{
//
// frmScribble
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(808, 542);
this.MaximizeBox = false;
this.Name = "frmScribble";
this.Text = "Scribble";
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new frmScribble());
}
}
}
]]>