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InteractiveZoomTo Event
See Also 
Leadtools.WinForms Namespace > RasterImageViewer Class : InteractiveZoomTo Event



Occurs when the user performs interactive center of the image display.

Syntax

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

Event Data

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

PropertyDescription
Cancel (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)Gets or sets a value indicating whether the interactive mode should be canceled.
Rectangle Returns the current interactive mode rectangle.
Status (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)Gets the current status of the interactive mode.

Example

This sample zooms the image when dragging a rectangle on the image. Also, it displays the contents of the InteractiveZoomTo event in the console

Visual BasicCopy Code
Private Sub viewer_InteractiveZoomTo(ByVal sender As Object, ByVal e As RasterViewerRectangleEventArgs)
   Console.WriteLine("InteractiveZoomTo: e.Rectangle {0}, e.Status {1}, e.Cancel {2}", e.Rectangle, e.Status, e.Cancel)
End Sub
Public Sub RasterImageViewer_InteractiveZoomTo(ByVal viewer As RasterImageViewer)
   viewer.InteractiveMode = RasterViewerInteractiveMode.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 EventHandler<RasterViewerRectangleEventArgs>(viewer_InteractiveZoomTo);
End Sub
C#Copy Code
private void viewer_InteractiveZoomTo(object sender, RasterViewerRectangleEventArgs e)
{
   Console.WriteLine("InteractiveZoomTo: e.Rectangle {0}, e.Status {1}, e.Cancel {2}", e.Rectangle, e.Status, e.Cancel);
}
public void RasterImageViewer_InteractiveZoomTo(RasterImageViewer viewer)
{
   viewer.InteractiveMode = RasterViewerInteractiveMode.ZoomTo;
   viewer.InteractiveZoomTo += new EventHandler<RasterViewerRectangleEventArgs>(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 EventHandler<RasterViewerRectangleEventArgs>(viewer_InteractiveZoomTo);
}

Remarks

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also