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InteractivePage Event
See Also  Example
Leadtools.WinForms Namespace > RasterImageViewer Class : InteractivePage Event




Occurs when the user performs interactive change of the current page using the mouse.

Syntax

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

Example

This sample loads all pages of a multipage file into the viewer, and lets you drag the mouse to view the pages. Also, it displays the contents of the InterativePage event in the console

Visual BasicCopy Code
Private Sub viewer_InteractivePage(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.SizeNS
   ElseIf e.Status = RasterViewerInteractiveStatus.End Then
      viewer.Cursor = Cursors.Default
   End If
   Console.WriteLine("InteractivePage: 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_InteractivePage(ByVal viewer As RasterImageViewer)
   ' Load a multipage file
   RasterCodecs.Startup()
   Dim codecs As RasterCodecs = New RasterCodecs()
   viewer.Image = codecs.Load("C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\eye.gif")
   codecs.Dispose()
   RasterCodecs.Shutdown()

   viewer.InteractiveMode = RasterViewerInteractiveMode.Page
   AddHandler viewer.InteractivePage, AddressOf viewer_InteractivePage

   MessageBox.Show("Drag mouse across image to view different pages")
   ' After you are done, you must remove the event handler as in below
   '
   ' viewer.InteractivePage -= new EventHandler<RasterViewerLineEventArgs>(viewer_InteractivePage);
End Sub
C#Copy Code
private void viewer_InteractivePage(object sender, RasterViewerLineEventArgs e) 
{ 
   RasterImageViewer viewer = sender as RasterImageViewer; 
   if (e.Status == RasterViewerInteractiveStatus.Begin) 
      viewer.Cursor = Cursors.SizeNS; 
   else if (e.Status == RasterViewerInteractiveStatus.End) 
      viewer.Cursor = Cursors.Default; 
   Console.WriteLine("InteractivePage: e.Begin {0}, e.End{1}, e.Status {2}, e.Cancel {3}", e.Begin, e.End, e.Status, e.Cancel); 
} 
public void RasterImageViewer_InteractivePage(RasterImageViewer viewer) 
{ 
   // Load a multipage file 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
   viewer.Image = codecs.Load(@"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\eye.gif"); 
   codecs.Dispose(); 
   RasterCodecs.Shutdown(); 
 
   viewer.InteractiveMode = RasterViewerInteractiveMode.Page; 
   viewer.InteractivePage += new EventHandler<RasterViewerLineEventArgs>(viewer_InteractivePage); 
 
   MessageBox.Show("Drag mouse across image to view different pages"); 
   // After you are done, you must remove the event handler as in below 
   // 
   // viewer.InteractivePage -= new EventHandler<RasterViewerLineEventArgs>(viewer_InteractivePage); 
}

Remarks

Only occurs when the InteractiveMode property is set to RasterViewerInteractiveMode.Page.

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