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InteractivePan Event
See Also 
Leadtools.WinForms Namespace > RasterImageViewer Class : InteractivePan Event



Occurs when the user performs interactive panning of the image display.

Syntax

Visual Basic (Declaration) 
Public Event InteractivePan As EventHandler(Of RasterViewerLineEventArgs)
Visual Basic (Usage)Copy Code
Dim instance As RasterImageViewer
Dim handler As EventHandler(Of RasterViewerLineEventArgs)
 
AddHandler instance.InteractivePan, handler
C# 
public event EventHandler<RasterViewerLineEventArgs> InteractivePan
C++/CLI 
public:
event EventHandler<RasterViewerLineEventArgs^>^ InteractivePan

Event Data

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

PropertyDescription
Begin Returns the beginning point for the current interactive mode line.
Cancel (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)Gets or sets a value indicating whether the interactive mode should be canceled.
End Returns the end point for the current interactive mode line.
Status (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)Gets the current status of the interactive mode.

Example

This sample changes the mouse cursor when panning, and displays the contents of the InteractivePan event in the console

Visual BasicCopy Code
Private Sub viewer_InteractivePan(ByVal sender As Object, ByVal e As RasterViewerLineEventArgs)
   Dim viewer As RasterImageViewer = CType(IIf(TypeOf sender Is RasterImageViewer, sender, Nothing), RasterImageViewer)
   If e.Status = RasterViewerInteractiveStatus.Begin Then
      viewer.Cursor = Cursors.Hand
   ElseIf e.Status = RasterViewerInteractiveStatus.End Then
      viewer.Cursor = Cursors.Default
   End If
   Console.WriteLine("InteractivePan: e.Begin {0}, e.End{1}, e.Status {2}, e.Cancel {3}", e.Begin, e.End, e.Status, e.Cancel)
End Sub
Public Sub RasterImageViewer_InteractivePan(ByVal viewer As RasterImageViewer)
   AddHandler viewer.InteractivePan, AddressOf viewer_InteractivePan
   viewer.InteractiveMode = RasterViewerInteractiveMode.Pan

   ' Do the panning

   ' After you are done, you must remove the event handler as in below
   ' viewer.InteractivePan -= new EventHandler<RasterViewerLineEventArgs>(viewer_InteractivePan);
End Sub
C#Copy Code
private void viewer_InteractivePan(object sender, RasterViewerLineEventArgs e)
{
   RasterImageViewer viewer = sender as RasterImageViewer;
   if (e.Status == RasterViewerInteractiveStatus.Begin)
      viewer.Cursor = Cursors.Hand;
   else if (e.Status == RasterViewerInteractiveStatus.End)
      viewer.Cursor = Cursors.Default;
   Console.WriteLine("InteractivePan: e.Begin {0}, e.End{1}, e.Status {2}, e.Cancel {3}", e.Begin, e.End, e.Status, e.Cancel);
}
public void RasterImageViewer_InteractivePan(RasterImageViewer viewer)
{
   viewer.InteractivePan += new EventHandler<RasterViewerLineEventArgs>(viewer_InteractivePan);
   viewer.InteractiveMode = RasterViewerInteractiveMode.Pan;

   // Do the panning

   // After you are done, you must remove the event handler as in below
   // viewer.InteractivePan -= new EventHandler<RasterViewerLineEventArgs>(viewer_InteractivePan);
}

Remarks

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also