/*
GDI+ Programming in C# and VB .NET
by Nick Symmonds
Publisher: Apress
ISBN: 159059035X
*/
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace IconImageDraw_c
{
/// <summary>
/// Summary description for IconImageDraw.
/// </summary>
public class IconImageDraw : System.Windows.Forms.Form
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public IconImageDraw()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
this.MouseMove += new MouseEventHandler(this.DrawBox);
this.MouseDown += new MouseEventHandler(this.StartBox);
this.MouseUp += new MouseEventHandler(this.EndBox);
}
/// <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()
{
//
// IconImageDraw
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(492, 373);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
this.MinimizeBox = false;
this.Name = "IconImageDraw";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "IconImageDraw";
this.Load += new System.EventHandler(this.IconImageDraw_Load);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
///
//"R" holds the image, "Box" is the new image home currently being
//drawn by holding the mouse down and dragging
private Rectangle R = Rectangle.Empty;
private Rectangle Box = Rectangle.Empty;
private Image I = Image.FromFile("sample.jpg");
private Icon ThisIcon = new Icon("usa.ico");
private bool OK2Paint = false;
[STAThread]
static void Main()
{
Application.Run(new IconImageDraw());
}
private void IconImageDraw_Load(object sender, System.EventArgs e)
{
}
protected override void OnPaint ( PaintEventArgs e )
{
//Always draw the icon
e.Graphics.DrawIcon(ThisIcon, 1, 1);
//Bail if rectangle is empty
if ( R == Rectangle.Empty )
return;
if ( !OK2Paint )
return;
Pen P = new Pen(Brushes.Black, 3);
e.Graphics.DrawRectangle(P, R);
// Draw image based on rectangle.
e.Graphics.DrawImage(I, R);
P.Dispose();
}
private void DrawBox ( System.Object sender , MouseEventArgs m )
{
//Prints the x,y coordinates directly on the screen
Graphics G = this.CreateGraphics();
Rectangle TextR = new Rectangle(10, this.Height-50, 100, 20 );
SolidBrush B = new SolidBrush(this.BackColor);
G.FillRectangle(B, TextR);
G.DrawString ( m.X.ToString() + ", " + m.Y.ToString(),
new Font("Arial", 10),
Brushes.Black, TextR, StringFormat.GenericDefault );
B.Dispose();
//Draw the box as the mouse drags
if ( m.Button == MouseButtons.Left )
{
if ( Box != Rectangle.Empty )
{
Pen P = new Pen(new SolidBrush(this.BackColor),1);
G.DrawRectangle ( P, Box );
P.Dispose();
}
Box = new Rectangle ( R.X, R.Y, m.X - R.X, m.Y - R.Y );
G.DrawRectangle( Pens.Black, Box );
}
}
private void StartBox( System.Object sender , MouseEventArgs m )
{
if ( m.Button == MouseButtons.Left )
{
R.X=m.X;
R.Y=m.Y;
OK2Paint = false;
}
}
private void EndBox( System.Object sender , MouseEventArgs m )
{
R.Width = m.X - R.X;
R.Height = m.Y - R.Y;
OK2Paint = true;
this.Refresh();
}
}
}
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IconImageDraw-c.zip( 12 k)
