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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()
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 InteractivePage 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(LeadtoolsExamples.Common.ImagesPath.Path + "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(LeadtoolsExamples.Common.ImagesPath.Path + "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 RasterImageViewer.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