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




Occurs when the user is using the MagnifyGlass.

Syntax

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

Example

This sample lets you drag the mouse to magnify parts of the image. Also, it displays the contents of the InteractiveMagnify event in the console

Visual BasicCopy Code
Private Sub viewer_InteractiveMagnifyGlass(ByVal sender As Object, ByVal e As RasterViewerLineEventArgs)
   If e.Status = RasterViewerInteractiveStatus.Begin Then
      System.Windows.Forms.Cursor.Hide()
   ElseIf e.Status = RasterViewerInteractiveStatus.End Then
      System.Windows.Forms.Cursor.Show()
   End If
   Console.WriteLine("InteractiveMagnifyGlass: 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_InteractiveMagnifyGlass(ByVal viewer As RasterImageViewer)
   viewer.InteractiveMode = RasterViewerInteractiveMode.MagnifyGlass
   AddHandler viewer.InteractiveMagnifyGlass, AddressOf viewer_InteractiveMagnifyGlass

   ' Drag mouse across image to see the magnifying glass
   ' After you are done, you must remove the event handler as in below
   '
   ' viewer.InteractiveMagnifyGlass -= new EventHandler<RasterViewerLineEventArgs>(viewer_InteractiveMagnifyGlass);
End Sub
C#Copy Code
private void viewer_InteractiveMagnifyGlass(object sender, RasterViewerLineEventArgs e) 
{ 
   if (e.Status == RasterViewerInteractiveStatus.Begin) 
      System.Windows.Forms.Cursor.Hide(); 
   else if (e.Status == RasterViewerInteractiveStatus.End) 
      System.Windows.Forms.Cursor.Show(); 
   Console.WriteLine("InteractiveMagnifyGlass: e.Begin {0}, e.End{1}, e.Status {2}, e.Cancel {3}", e.Begin, e.End, e.Status, e.Cancel); 
} 
public void RasterImageViewer_InteractiveMagnifyGlass(RasterImageViewer viewer) 
{ 
   viewer.InteractiveMode = RasterViewerInteractiveMode.MagnifyGlass; 
   viewer.InteractiveMagnifyGlass += new EventHandler<RasterViewerLineEventArgs>(viewer_InteractiveMagnifyGlass); 
 
   // Drag mouse across image to see the magnifying glass 
   // After you are done, you must remove the event handler as in below 
   // 
   // viewer.InteractiveMagnifyGlass -= new EventHandler<RasterViewerLineEventArgs>(viewer_InteractiveMagnifyGlass); 
}

Remarks

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

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