InteractiveMagnifyGlass Event

C#
Visual Basic
Objective-C
Java
C++

public event EventHandler<RasterViewerLineEventArgs> InteractiveMagnifyGlass

'Declaration
 
Public Event InteractiveMagnifyGlass As EventHandler(Of RasterViewerLineEventArgs)

'Usage
 
Dim instance As RasterImageViewer
Dim handler As EventHandler(Of RasterViewerLineEventArgs)
 
AddHandler instance.InteractiveMagnifyGlass, handler

public:
event EventHandler<RasterViewerLineEventArgs^>^ InteractiveMagnifyGlass

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

Property	Description
Begin	Returns the beginning point for the current interactive mode line.
Cancel (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)	Gets or sets a value indicating whether the interactive mode should be canceled.
End	Returns the end point for the current interactive mode line.
Status (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)	Gets the current status of the interactive mode.

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

This sample lets you drag the mouse to magnify parts of the image. Also, it displays the contents of the InteractiveMagnifyGlass 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_InteractiveMagnifyGlass(ByVal sender As Object, ByVal e As RasterViewerLineEventArgs)
   If e.Status = RasterViewerInteractiveStatus.Begin Then
      System.Windows.Forms.Cursor.Hide()
   ElseIf e.Status = RasterViewerInteractiveStatus.End Then
      System.Windows.Forms.Cursor.Show()
   End If
   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 RasterImageViewer_InteractiveMagnifyGlass(ByVal viewer As RasterImageViewer)
   viewer.InteractiveMode = RasterViewerInteractiveMode.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 EventHandler<RasterViewerLineEventArgs>(viewer_InteractiveMagnifyGlass);
End Sub

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

private void viewer_InteractiveMagnifyGlass(object sender, RasterViewerLineEventArgs e)
{
   if (e.Status == RasterViewerInteractiveStatus.Begin)
      System.Windows.Forms.Cursor.Hide();
   else if (e.Status == RasterViewerInteractiveStatus.End)
      System.Windows.Forms.Cursor.Show();
   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 RasterImageViewer_InteractiveMagnifyGlass(RasterImageViewer viewer)
{
   viewer.InteractiveMode = RasterViewerInteractiveMode.MagnifyGlass;
   viewer.InteractiveMagnifyGlass += new EventHandler<RasterViewerLineEventArgs>(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 EventHandler<RasterViewerLineEventArgs>(viewer_InteractiveMagnifyGlass);
}

Target Platforms

Reference

RasterImageViewer Class
RasterImageViewer Members