Image Zoom
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public class Form1 : System.Windows.Forms.Form {
private System.Windows.Forms.Label label1= new System.Windows.Forms.Label();
private System.Windows.Forms.GroupBox groupBox1= new System.Windows.Forms.GroupBox();
private System.Windows.Forms.RadioButton radioButton1= new System.Windows.Forms.RadioButton();
private System.Windows.Forms.RadioButton radioButton2= new System.Windows.Forms.RadioButton();
private System.Windows.Forms.RadioButton radioButton3= new System.Windows.Forms.RadioButton();
private System.Windows.Forms.RadioButton radioButton4= new System.Windows.Forms.RadioButton();
private System.Windows.Forms.Label label2= new System.Windows.Forms.Label();
private System.Windows.Forms.CheckBox checkBox1= new System.Windows.Forms.CheckBox();
Image im = null;
Image im2 = null;
public Form1() {
this.groupBox1.SuspendLayout();
this.SuspendLayout();
this.label1.Location = new System.Drawing.Point(8, 16);
this.label1.Size = new System.Drawing.Size(200, 240);
this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
this.checkBox1,
this.radioButton1,
this.radioButton2,
this.radioButton3,
this.radioButton4});
this.groupBox1.Location = new System.Drawing.Point(232, 48);
this.groupBox1.Size = new System.Drawing.Size(72, 128);
this.checkBox1.Location = new System.Drawing.Point(8, 32);
this.checkBox1.Size = new System.Drawing.Size(56, 24);
this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);
this.radioButton1.Location = new System.Drawing.Point(8, 64);
this.radioButton1.Size = new System.Drawing.Size(16, 24);
this.radioButton2.Location = new System.Drawing.Point(40, 64);
this.radioButton2.Size = new System.Drawing.Size(16, 24);
this.radioButton3.Location = new System.Drawing.Point(8, 96);
this.radioButton3.Size = new System.Drawing.Size(16, 24);
this.radioButton4.Location = new System.Drawing.Point(40, 96);
this.radioButton4.Size = new System.Drawing.Size(16, 24);
this.label2.Location = new System.Drawing.Point(328, 16);
this.label2.Size = new System.Drawing.Size(200, 240);
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(536, 266);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.groupBox1,
this.label1,
this.label2});
this.groupBox1.ResumeLayout(false);
this.ResumeLayout(false);
this.Text = "Zooming";
this.label1.Text = "";
this.groupBox1.Text = "Zoom";
this.checkBox1.Text = "Paint";
this.radioButton1.Checked = false;
this.radioButton1.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
this.radioButton2.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
this.radioButton3.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
this.radioButton4.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
}
[STAThread]
static void Main() {
Application.Run(new Form1());
}
protected override void OnPaint(PaintEventArgs e) { ImageZoom(); }
private void checkBox1_CheckedChanged(object sender, System.EventArgs e) { ImageZoom(); }
private void radioButtons_CheckedChanged(object sender, System.EventArgs e) { ImageZoom(); }
protected void ImageZoom() {
Graphics g1 = Graphics.FromHwnd(this.label1.Handle);
Graphics g2 = Graphics.FromHwnd(this.label2.Handle);
Rectangle rec;
Rectangle recPart;
if (this.checkBox1.Checked) {
if (im == null) ReadImage();
rec = new Rectangle(0, 0, label1.Width, label1.Height);
g1.DrawImage(im, rec);
recPart = new Rectangle(im.Width / 4, im.Height / 4, im.Width / 2, im.Height / 2);
if (this.radioButton1.Checked)
recPart = new Rectangle(0, 0, im.Width / 2, im.Height / 2);
if (this.radioButton2.Checked)
recPart = new Rectangle(im.Width / 2, 0, im.Width / 2, im.Height / 2);
if (this.radioButton3.Checked)
recPart = new Rectangle(0, im.Height / 2, im.Width / 2, im.Height / 2);
if (this.radioButton4.Checked)
recPart = new Rectangle(im.Width / 2, im.Height / 2, im.Width / 2, im.Height / 2);
g2.DrawImage(im, rec, recPart, GraphicsUnit.Pixel);
} else {
Clear(g1);
Clear(g2);
}
g1.Dispose(); g2.Dispose();
}
protected void ReadImage() {
string path = "3.BMP";
im = Image.FromFile(path);
this.radioButton1.Enabled = true;
this.radioButton2.Enabled = true;
this.radioButton3.Enabled = true;
this.radioButton4.Enabled = true;
}
protected void Clear(Graphics g) {
g.Clear(this.BackColor);
g.Dispose();
im = null;
im2 = null;
this.radioButton1.Checked = false;
this.radioButton2.Checked = false;
this.radioButton3.Checked = false;
this.radioButton4.Checked = false;
this.radioButton1.Enabled = false;
this.radioButton2.Enabled = false;
this.radioButton3.Enabled = false;
this.radioButton4.Enabled = false;
}
}
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