c#放大镜

using System;


using System.Drawing;


using System.Collections;


using System.ComponentModel;


using System.Windows.Forms;


using System.Data;





namespace Magnifier


{


public class Form1 : System.Windows.Forms.Form


{


private System.Windows.Forms.Button button1;


private System.Windows.Forms.OpenFileDialog openFileDialog1;


private System.ComponentModel.Container components = null;


private Image img = null;


private System.Windows.Forms.Panel panel1;


private System.Windows.Forms.Panel panel2;


private System.Windows.Forms.PictureBox pictureBox2;


private System.Windows.Forms.PictureBox pictureBox1;


private System.Windows.Forms.Label label1;


private int scale = 1;





public Form1()


{


InitializeComponent();


}





protected override void Dispose( bool disposing )


{


if( disposing )


{


if (components != null) 


{


components.Dispose();


}


}


base.Dispose( disposing );


}





#region Windows 窗体设计器生成的代码


private void InitializeComponent()


{


this.button1 = new System.Windows.Forms.Button();


this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();


this.panel1 = new System.Windows.Forms.Panel();


this.panel2 = new System.Windows.Forms.Panel();


this.pictureBox2 = new System.Windows.Forms.PictureBox();


this.pictureBox1 = new System.Windows.Forms.PictureBox();


this.label1 = new System.Windows.Forms.Label();


this.panel1.SuspendLayout();


this.panel2.SuspendLayout();


this.SuspendLayout();


// 


// button1


// 


this.button1.Location = new System.Drawing.Point(416, 520);


this.button1.Name = "button1";


this.button1.Size = new System.Drawing.Size(96, 23);


this.button1.TabIndex = 1;


this.button1.Text = "浏览 >>";


this.button1.Click += new System.EventHandler(this.button1_Click);


// 


// panel1


// 


this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;


this.panel1.Controls.Add(this.panel2);


this.panel1.Controls.Add(this.pictureBox1);


this.panel1.Location = new System.Drawing.Point(8, 8);


this.panel1.Name = "panel1";


this.panel1.Size = new System.Drawing.Size(504, 504);


this.panel1.TabIndex = 0;


// 


// panel2


// 


this.panel2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;


this.panel2.Controls.Add(this.pictureBox2);


this.panel2.Enabled = false;


this.panel2.Location = new System.Drawing.Point(50, 50);


this.panel2.Name = "panel2";


this.panel2.Size = new System.Drawing.Size(80, 80);


this.panel2.TabIndex = 1;


// 


// pictureBox2


// 


this.pictureBox2.Location = new System.Drawing.Point(0, 0);


this.pictureBox2.Name = "pictureBox2";


this.pictureBox2.Size = new System.Drawing.Size(80, 80);


this.pictureBox2.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;


this.pictureBox2.TabIndex = 0;


this.pictureBox2.TabStop = false;


// 


// pictureBox1


// 


this.pictureBox1.Cursor = System.Windows.Forms.Cursors.Cross;


this.pictureBox1.Location = new System.Drawing.Point(0, 0);


this.pictureBox1.Name = "pictureBox1";


this.pictureBox1.Size = new System.Drawing.Size(500, 500);


this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;


this.pictureBox1.TabIndex = 0;


this.pictureBox1.TabStop = false;


this.pictureBox1.Click += new System.EventHandler(this.pictureBox1_Click);


this.pictureBox1.DoubleClick += new System.EventHandler(this.pictureBox1_DoubleClick);


this.pictureBox1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.pictureBox1_MouseMove);


// 


// label1


// 


this.label1.ForeColor = System.Drawing.Color.Blue;


this.label1.Location = new System.Drawing.Point(8, 520);


this.label1.Name = "label1";


this.label1.Size = new System.Drawing.Size(296, 24);


this.label1.TabIndex = 2;


this.label1.Text = "说明：鼠标单击可放大图片，双击可还原初始大小。";


this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;


// 


// Form1


// 


this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);


this.ClientSize = new System.Drawing.Size(522, 551);


this.Controls.Add(this.label1);


this.Controls.Add(this.button1);


this.Controls.Add(this.panel1);


this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;


this.MaximizeBox = false;


this.Name = "Form1";


this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;


this.Text = "图片放大镜 - 测试版 http://www.hbhmao.cn";


this.panel1.ResumeLayout(false);


this.panel2.ResumeLayout(false);


this.ResumeLayout(false);





}


#endregion





[STAThread]


static void Main() 


{


Application.Run(new Form1());


}





private void button1_Click(object sender, System.EventArgs e)


{


openFileDialog1.InitialDirectory = Application.StartupPath;


openFileDialog1.Filter = "图片文件|*.jpg;*.bmp;*.gif;*.jpeg;*.png";


if (openFileDialog1.ShowDialog() != System.Windows.Forms.DialogResult.OK)


{


return;


}


pictureBox1.Width = pictureBox1.Height = 500;


try


{


img = Image.FromFile(openFileDialog1.FileName);


if (img.Width < img.Height)


{


pictureBox1.Width = (int)((1.0 * img.Width / img.Height) * pictureBox1.Height);


}


else


{


pictureBox1.Height = (int)((1.0 * img.Height / img.Width) * pictureBox1.Width);


}


pictureBox1.Image = img;


pictureBox2.Width = img.Width * scale;


pictureBox2.Height = img.Height * scale;


pictureBox2.Image = img;


}


catch (OutOfMemoryException ee)


{


MessageBox.Show("文件类型不对"+ee);


}


catch (Exception ee)


{


MessageBox.Show("不知名错误"+ee);


}


}





private void pictureBox1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)


{


if (img != null)


{


int left = (int)(e.X * (1.0 * img.Width/pictureBox1.Width)*scale);


int top = (int)(e.Y * (1.0 * img.Height/pictureBox1.Height)*scale);





left -= panel2.Width/2;


top -= panel2.Height/2;





pictureBox2.Left = -left;


pictureBox2.Top = -top;





pictureBox1.Refresh();


}


panel2.Top = e.Y - panel2.Height / 2;


panel2.Left = e.X - panel2.Width / 2;


}





private void pictureBox1_Click(object sender, System.EventArgs e)


{


if (img == null || scale > 10)


{


return;


}


scale++;


panel2.Width += 10;


panel2.Height += 10;


pictureBox2.Width = img.Width * scale;


pictureBox2.Height = img.Height * scale;


}





private void pictureBox1_DoubleClick(object sender, System.EventArgs e)


{


if (img == null)


{


return;


}


scale = 1;


panel2.Width = 80;


panel2.Height = 80;


pictureBox2.Width = img.Width * scale;


pictureBox2.Height = img.Height * scale;


}





}


}