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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()
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 InteractiveMagnifyGlass 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

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