In This Topic ▼

Pan Event

Summary

Occurs when the user performs a panning process for the RasterImagePanViewer displayed image.

Syntax

C++/CLI

C++

public event EventHandler<RasterImagePanViewerEventArgs> Pan

public: 
event EventHandler<RasterImagePanViewerEventArgs^>^ Pan

public:  
   event EventHandler<RasterImagePanViewerEventArgs^>^ Pan

Event Data

The event handler receives an argument of type RasterImagePanViewerEventArgs containing data related to this event. The following RasterImagePanViewerEventArgs properties provide information specific to this event.

Property	Description
Cancel	Specifies whether or not to cancel the current panning process.
Rectangle	The Pan Rectangle.
Status	The Pan process current status.

Remarks

This event provides the current status of the pan operation: Begin, Panning, or End, as well the current panning rectangle.

Example

using Leadtools.WinForms; 
using Leadtools; 
using Leadtools.Codecs; 
 
class MyForm1 : Form 
{ 
   public RasterImagePanViewer panViewer; 
   public RasterImageViewer viewer; 
   public MyForm1(string title) 
   { 
      Text = title; 
 
      // Set the size of the form 
      Size = new Size(400, 400); 
 
      // Create the viewer 
      viewer = new RasterImageViewer(); 
      viewer.Size = new Size(Size.Width, Size.Height / 2); 
      viewer.Dock = DockStyle.Fill; 
 
      // Load an image 
      RasterCodecs codecs = new RasterCodecs(); 
      viewer.Image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "image1.cmp")); 
 
      panViewer = new RasterImagePanViewer(); 
      panViewer.Dock = DockStyle.Top; 
      panViewer.BackColor = Color.Bisque; 
      panViewer.ClipCursor = true; 
      panViewer.BorderStyle = BorderStyle.Fixed3D; 
      panViewer.BringToFront(); 
      panViewer.Pan += new EventHandler<RasterImagePanViewerEventArgs>(panViewer_Pan); 
      panViewer.RectangleColor = Color.Blue; 
      panViewer.ImageColor = Color.FromArgb(128, 0, 0, 0); 
      panViewer.Cursor = Cursors.Hand; 
      panViewer.Viewer = viewer; 
 
      Controls.Add(panViewer); 
      Controls.Add(viewer); 
      viewer.BringToFront(); 
   } 
 
   private void panViewer_Pan(object sender, RasterImagePanViewerEventArgs e) 
   { 
      switch (e.Status) 
      { 
         case RasterImagePanViewerStatus.Begin: 
         case RasterImagePanViewerStatus.Panning: 
         case RasterImagePanViewerStatus.End: 
            { 
               Text = "Pan Status = " + e.Status.ToString() + " Rectangle =" + e.Rectangle.ToString() + " Cancel = " + e.Cancel.ToString(); 
               Console.WriteLine(Text); 
               break; 
            } 
      } 
   } 
} 
 
public void RasterImagePanViewer_Viewer() 
{ 
   MyForm1 form = new MyForm1("Test_RasterImagePanViewer_Viewer"); 
   form.ShowDialog(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms