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InteractiveMagnifyGlass Event

Summary

Occurs when the user is using the MagnifyGlass.

Syntax

C++

public event EventHandler<RasterViewerLineEventArgs> InteractiveMagnifyGlass

  
Public Event InteractiveMagnifyGlass As EventHandler(Of RasterViewerLineEventArgs)

public: 
event EventHandler<RasterViewerLineEventArgs^>^ InteractiveMagnifyGlass

Event Data

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.

Remarks

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

Example

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

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); 
}

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

Requirements

Target Platforms

Reference

RasterImageViewer Class

RasterImageViewer Members

Help Version 19.0.2017.10.27