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InteractiveMagnifyGlass Event
See Also 
Leadtools.Windows.Controls Namespace > ImageViewer Class : InteractiveMagnifyGlass Event



Occurs when the user is using the MagnifyGlass on this control. Supported in Silverlight, Windows Phone 7

Syntax

Visual Basic (Declaration) 
Public Event InteractiveMagnifyGlass As EventHandler(Of LineInteractiveEventArgs)
Visual Basic (Usage)Copy Code
Dim instance As ImageViewer
Dim handler As EventHandler(Of LineInteractiveEventArgs)
 
AddHandler instance.InteractiveMagnifyGlass, handler
C# 
public event EventHandler<LineInteractiveEventArgs> InteractiveMagnifyGlass
C++/CLI 
public:
event EventHandler<LineInteractiveEventArgs^>^ InteractiveMagnifyGlass

Event Data

The event handler receives an argument of type LineInteractiveEventArgs containing data related to this event. The following LineInteractiveEventArgs properties provide information specific to this event.

PropertyDescription
Begin Gets the begin location for the current interactive line mode. Supported in Silverlight, Windows Phone 7
Cancel (Inherited from Leadtools.Windows.Controls.InteractiveEventArgs)Gets or sets a value indicating whether the interactive mode should be canceled. Supported in Silverlight, Windows Phone 7
End Gets the end location for the current interactive line mode. Supported in Silverlight, Windows Phone 7
Handled (Inherited from System.Windows.RoutedEventArgs) 
OriginalSource (Inherited from System.Windows.RoutedEventArgs) 
RoutedEvent (Inherited from System.Windows.RoutedEventArgs) 
Source (Inherited from System.Windows.RoutedEventArgs) 
Status (Inherited from Leadtools.Windows.Controls.InteractiveEventArgs)Gets the current status of the interactive mode. Supported in Silverlight, Windows Phone 7

Example

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

Visual BasicCopy Code
Private Sub viewer_InteractiveMagnifyGlass(ByVal sender As Object, ByVal e As LineInteractiveEventArgs)
    Dim ImageViewer As ImageViewer = TryCast(sender, ImageViewer)
    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 BitmapSourceViewer_InteractiveMagnifyGlass(ByVal viewer As ImageViewer)
    viewer.SetInteractiveModeCursor(InteractiveMode.MagnifyGlass, Cursors.Arrow, Cursors.None)
    viewer.InteractiveMode = InteractiveMode.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 ImageViewer.InteractiveMagnifyGlassEventHandler(viewer_InteractiveMagnifyGlass);
End Sub
C#Copy Code
private void viewer_InteractiveMagnifyGlass(object sender, LineInteractiveEventArgs e)
{
   ImageViewer ImageViewer = sender as ImageViewer;
   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 BitmapSourceViewer_InteractiveMagnifyGlass(ImageViewer viewer)
{
   viewer.SetInteractiveModeCursor(InteractiveMode.MagnifyGlass, Cursors.Arrow, Cursors.None);
   viewer.InteractiveMode = InteractiveMode.MagnifyGlass;
   viewer.InteractiveMagnifyGlass +=new EventHandler<LineInteractiveEventArgs>(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 ImageViewer.InteractiveMagnifyGlassEventHandler(viewer_InteractiveMagnifyGlass);
}
SilverlightCSharpCopy Code
private void viewer_InteractiveMagnifyGlass(object sender, LineInteractiveEventArgs e)
{
   ImageViewer ImageViewer = sender as ImageViewer;
   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 BitmapSourceViewer_InteractiveMagnifyGlass(ImageViewer viewer)
{
   viewer.SetInteractiveModeCursor(InteractiveMode.MagnifyGlass, Cursors.Arrow, Cursors.None);
   viewer.InteractiveMode = InteractiveMode.MagnifyGlass;
   viewer.InteractiveMagnifyGlass +=new EventHandler<LineInteractiveEventArgs>(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 ImageViewer.InteractiveMagnifyGlassEventHandler(viewer_InteractiveMagnifyGlass);
}
SilverlightVBCopy Code
Private Sub viewer_InteractiveMagnifyGlass(ByVal sender As Object, ByVal e As LineInteractiveEventArgs)
   Dim ImageViewer As ImageViewer = TryCast(sender, ImageViewer)
   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 BitmapSourceViewer_InteractiveMagnifyGlass(ByVal viewer As ImageViewer)
   viewer.SetInteractiveModeCursor(InteractiveMode.MagnifyGlass, Cursors.Arrow, Cursors.None)
   viewer.InteractiveMode = InteractiveMode.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 ImageViewer.InteractiveMagnifyGlassEventHandler(viewer_InteractiveMagnifyGlass);
End Sub

Remarks

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

Requirements

Target Platforms: Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family

See Also