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



Occurs when the user performs interactive zoom to rectangle of the image display. Supported in Silverlight, Windows Phone 7

Syntax

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

Event Data

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

PropertyDescription
Bounds Gets the bounds location for the current interactive rectangle 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
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 example zooms the image when dragging a rectangle on the image. Also, it displays the contents of the ImageViewer.InteractiveZoomTo event in the console.

Visual BasicCopy Code
Private Sub viewer_InteractiveZoomTo(ByVal sender As Object, ByVal e As RectangleInteractiveEventArgs)
    Console.WriteLine("InteractiveZoomTo: e.Rectangle {0}, e.Status {1}, e.Cancel {2}", e.Bounds, e.Status, e.Cancel)
End Sub
Public Sub BitmapSourceViewer_InteractiveZoomTo(ByVal viewer As ImageViewer)
    viewer.InteractiveMode = InteractiveMode.ZoomTo
    AddHandler viewer.InteractiveZoomTo, AddressOf viewer_InteractiveZoomTo

    MessageBox.Show("Draw a rectangle with the mouse to cause a zoom")
    ' After you are done, you must remove the event handler as in below
    '
    ' viewer.InteractiveZoomTo -= new ImageViewer.InteractiveZoomToEventHandler(viewer_InteractiveZoomTo);
End Sub
C#Copy Code
private void viewer_InteractiveZoomTo(object sender, RectangleInteractiveEventArgs e)
{
   Console.WriteLine("InteractiveZoomTo: e.Rectangle {0}, e.Status {1}, e.Cancel {2}", e.Bounds, e.Status, e.Cancel);
}
public void BitmapSourceViewer_InteractiveZoomTo(ImageViewer viewer)
{
   viewer.InteractiveMode = InteractiveMode.ZoomTo;
   viewer.InteractiveZoomTo +=new EventHandler<RectangleInteractiveEventArgs>(viewer_InteractiveZoomTo);

   MessageBox.Show("Draw a rectangle with the mouse to cause a zoom");
   // After you are done, you must remove the event handler as in below
   //
   // viewer.InteractiveZoomTo -= new ImageViewer.InteractiveZoomToEventHandler(viewer_InteractiveZoomTo);
}
SilverlightCSharpCopy Code
private void viewer_InteractiveZoomTo(object sender, RectangleInteractiveEventArgs e)
{
   Console.WriteLine("InteractiveZoomTo: e.Rectangle {0}, e.Status {1}, e.Cancel {2}", e.Bounds, e.Status, e.Cancel);
}
public void BitmapSourceViewer_InteractiveZoomTo(ImageViewer viewer)
{
   viewer.InteractiveMode = InteractiveMode.ZoomTo;
   viewer.InteractiveZoomTo +=new EventHandler<RectangleInteractiveEventArgs>(viewer_InteractiveZoomTo);

   MessageBox.Show("Draw a rectangle with the mouse to cause a zoom");
   // After you are done, you must remove the event handler as in below
   //
   // viewer.InteractiveZoomTo -= new ImageViewer.InteractiveZoomToEventHandler(viewer_InteractiveZoomTo);
}
SilverlightVBCopy Code
Private Sub viewer_InteractiveZoomTo(ByVal sender As Object, ByVal e As RectangleInteractiveEventArgs)
   Console.WriteLine("InteractiveZoomTo: e.Rectangle {0}, e.Status {1}, e.Cancel {2}", e.Bounds, e.Status, e.Cancel)
End Sub
Public Sub BitmapSourceViewer_InteractiveZoomTo(ByVal viewer As ImageViewer)
   viewer.InteractiveMode = InteractiveMode.ZoomTo
   AddHandler viewer.InteractiveZoomTo, AddressOf viewer_InteractiveZoomTo

   MessageBox.Show("Draw a rectangle with the mouse to cause a zoom")
   ' After you are done, you must remove the event handler as in below
   '
   ' viewer.InteractiveZoomTo -= new ImageViewer.InteractiveZoomToEventHandler(viewer_InteractiveZoomTo);
End Sub

Remarks

Occurs when the ImageViewer.InteractiveMode property is set to InteractiveMode.ZoomTo.

Requirements

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

See Also