InteractiveZoomTo Event

C#
Visual Basic
Objective-C
Java
C++

public event EventHandler<RasterViewerRectangleEventArgs> InteractiveZoomTo

'Declaration
 
Public Event InteractiveZoomTo As EventHandler(Of RasterViewerRectangleEventArgs)

'Usage
 
Dim instance As RasterImageViewer
Dim handler As EventHandler(Of RasterViewerRectangleEventArgs)
 
AddHandler instance.InteractiveZoomTo, handler

public:
event EventHandler<RasterViewerRectangleEventArgs^>^ InteractiveZoomTo

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.

Property	Description
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.

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

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

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools.WinForms
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Drawing

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

using Leadtools.WinForms;
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Color;
using Leadtools.Drawing;

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);
}

Target Platforms

Reference

RasterImageViewer Class
RasterImageViewer Members