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InteractivePan Event
See Also  Example
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();

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

Only occurs when the RasterImageViewer.InteractiveMode property is set to RasterViewerInteractiveMode.Pan.

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also