I have a PictureBox control which i am genrating on runtime which can zoom in using MouseWheel event. Now I want to add a panning feature to it. I mean when PictureBox is in zoomed state, if user left clicks and holds the click then move the mouse, the image would pan within the picturebox.Here is my Code:using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Data.SqlClient;
using System.Drawing.Drawing2D;
using System.Drawing.Printing;
using iTextSharp;
using iTextSharp.text;
using iTextSharp.text.pdf;
using System.Drawing.Imaging;
namespace WorkOnImage
{
public partial class ImageForm : Form
{
public System.Drawing.Image newImage { get; set; }
public System.Drawing.Image imagePrint { get; set; }
public string imagePath { get; set; }
public string formName { get; set; }
MyPictureBox obj = new MyPictureBox();
public ImageForm()
{
InitializeComponent();
}
private void ImageForm_Load(object sender, EventArgs e)
{
System.Drawing.Image img = System.Drawing.Image.FromFile(imagePath);
this.imagePrint = img;
this.Left = 0;
this.Top = 0;
int w = System.Windows.Forms.SystemInformation.PrimaryMonitorSize.Width-24;
int h = System.Windows.Forms.SystemInformation.PrimaryMonitorSize.Height-80;
this.Size = new Size(w, h);
obj.Size = this.Size;
obj.SizeMode = PictureBoxSizeMode.Zoom;
obj.Image = img;
obj.Top = 40;
this.Controls.Add(obj);
this.ActiveControl = obj;
this.WindowState = FormWindowState.Maximized;
this.Text = formName.ToString();
}
private void btnBack_Click(object sender, EventArgs e)
{
ShowImages frmShowImg = new ShowImages();
frmShowImg.Show();
this.Hide();
}
private void btnRotate_Click(object sender, EventArgs e)
{
try
{
this.Controls.Add(obj);
this.ActiveControl = obj;
System.Drawing.Image img = obj.Image;
img.RotateFlip(RotateFlipType.Rotate90FlipNone);
obj.Image = img;
}
catch
{
MessageBox.Show("Invalid Statements are running !");
}
}
private void btnPrint_Click(object sender, EventArgs e)
{
PrintDocument doc = new PrintDocument();
doc.PrintPage += new PrintPageEventHandler(doc_PrintPage);
PrintDialog dlgSettings = new PrintDialog();
dlgSettings.Document = doc;
if (dlgSettings.ShowDialog() == DialogResult.OK)
{
doc.Print();
}
}
void doc_PrintPage(object sender, PrintPageEventArgs e)
{
e.Graphics.DrawImage(imagePrint, e.Graphics.VisibleClipBounds.Location.X,
e.Graphics.VisibleClipBounds.Y, e.Graphics.VisibleClipBounds.Size.Width,
e.Graphics.VisibleClipBounds.Size.Height);
}
private void btnAntiClock_Click(object sender, EventArgs e)
{
try
{
this.Controls.Add(obj);
this.ActiveControl = obj;
System.Drawing.Image img = obj.Image;
img.RotateFlip(RotateFlipType.Rotate270FlipNone);
obj.Image = img;
}
catch
{
MessageBox.Show("Invalid Statements are running !");
}
}
private void btnRotate180_Click(object sender, EventArgs e)
{
try
{
this.Controls.Add(obj);
this.ActiveControl = obj;
System.Drawing.Image img = obj.Image;
img.RotateFlip(RotateFlipType.Rotate180FlipNone);
obj.Image = img;
}
catch
{
MessageBox.Show("Invalid Statements are running !");
}
}
private void btnFitDisplay_Click(object sender, EventArgs e)
{
obj.SizeMode = PictureBoxSizeMode.StretchImage;
obj.Refresh();
}
}
public class MyPictureBox : PictureBox
{
private int zoomLevel = 1;
private Point zoomPoint;
public MyPictureBox()
{
this.MouseWheel += new MouseEventHandler(MyPictureBox_MouseWheel);
}
void MyPictureBox_MouseWheel(object sender, MouseEventArgs e)
{
if (this.zoomLevel == 1)
{
this.zoomPoint = new Point(e.X, e.Y);
}
if (e.Delta > 0)
{
if (zoomLevel < 20)
{
zoomLevel += 1;
}
}
else
{
if (e.Delta < 1)
{
if (zoomLevel > 1)
{
zoomLevel -= 1;
}
}
}
this.Invalidate();
}
new public System.Drawing.Image Image
{
get
{
return base.Image;
}
set
{
zoomLevel = 1;
base.Image = value;
}
}
protected override void OnPaint(PaintEventArgs pe)
{
// base.OnPaint(pe);
if (this.Image != null)
{
Point loc;
Size sz;
if (zoomLevel != 1)
{
sz = new Size(this.Image.Width / zoomLevel, this.Image.Height / zoomLevel);
loc = new Point((int)(this.Image.Width * (zoomPoint.X / (double)this.ClientRectangle.Width)) - sz.Width / 2,
(int)(this.Image.Height * (zoomPoint.Y / (double)this.ClientRectangle.Height)) - sz.Height / 2);
}
else
{
loc = new Point(0, 0);
sz = this.Image.Size;
}
System.Drawing.Rectangle rectSrc = new System.Drawing.Rectangle(loc, sz);
pe.Graphics.DrawImage(this.Image, this.ClientRectangle, rectSrc, GraphicsUnit.Pixel);
}
}
}
}
Reply Soon its urgent
Thanks.