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InteractiveZoomTo Event
See Also  Example
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()
Managed Extensions for C++ 
public: __event EventHandler<RasterViewerRectangleEventArgs>* InteractiveZoomTo();
C++/CLI 
public:
event EventHandler<RasterViewerRectangleEventArgs>^ InteractiveZoomTo();

Example

This sample zooms the image when dragging a rectangle on the image. Also, it displays the contents of the InterativeZoomTo 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

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

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