RasterImageChangedEventArgs Class

Summary

Provides data for the Changed event.

Syntax

C++/CLI

Python

public class RasterImageChangedEventArgs : EventArgs

public ref class RasterImageChangedEventArgs : public System.EventArgs

class RasterImageChangedEventArgs(EventArgs):

Remarks

Whenever the properties or data of a RasterImage is changed programatically, the RasterImage.Changed event will fire with an instance of the RasterImageChangedEventArgs class. This instance contains the Flags property that holds information on what has changed in the image.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Dicom; 
using Leadtools.Drawing; 
using Leadtools.Controls; 
using Leadtools.Svg; 
 
 
public void ChangedExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
 
   // Load the image 
   RasterImage img = codecs.Load(srcFileName); 
 
   // Subscribe to the Changed event of this image 
   img.Changed += new EventHandler<RasterImageChangedEventArgs>(img_Changed); 
 
   // Call a few methods and image processing commands that changes the image 
   Console.WriteLine("Calling FlipViewPerspective"); 
   img.FlipViewPerspective(true); 
 
   Console.WriteLine("Calling RotateViewPerspective"); 
   img.RotateViewPerspective(90); 
 
   Console.WriteLine("Calling FlipCommand"); 
   FlipCommand flip = new FlipCommand(true); 
   flip.Run(img); 
 
   // Now disable firing the events and call the methods again 
   Console.WriteLine("Disabling the events"); 
   img.DisableEvents(); 
 
   Console.WriteLine("Calling FlipViewPerspective"); 
   img.FlipViewPerspective(true); 
 
   Console.WriteLine("Calling RotateViewPerspective"); 
   img.RotateViewPerspective(90); 
 
   Console.WriteLine("Calling FlipCommand while"); 
   flip.Run(img); 
 
   // Re-enable the events and fire it manually 
   Console.WriteLine("Re-enabling the events"); 
   img.EnableEvents(); 
 
   Console.WriteLine("Firing the event manually"); 
   RasterImageChangedFlags flags = RasterImageChangedFlags.Data | RasterImageChangedFlags.ViewPerspective; 
   RasterImageChangedEventArgs e = new RasterImageChangedEventArgs(flags); 
 
   img.OnChanged(e); 
 
   // Clean up 
   img.Changed -= new EventHandler<RasterImageChangedEventArgs>(img_Changed); 
   img.Dispose(); 
   codecs.Dispose(); 
} 
 
void img_Changed(object sender, RasterImageChangedEventArgs e) 
{ 
   // Show the changed flags 
   Console.WriteLine("Changed: {0}", e.Flags); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.util.ArrayList; 
import java.util.List; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.core.*; 
import leadtools.svg.*; 
import leadtools.imageprocessing.CloneCommand; 
import leadtools.imageprocessing.FillCommand; 
import leadtools.imageprocessing.FlipCommand; 
import leadtools.imageprocessing.GrayscaleCommand; 
import leadtools.imageprocessing.color.InvertCommand; 
import leadtools.imageprocessing.color.PosterizeCommand; 
 
 
public void changedExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp"); 
 
   // Load the image 
   RasterImage img = codecs.load(srcFileName); 
 
   // Subscribe to the Changed event of this image 
   img.addChangedListener(img_Changed); 
 
   // Call a few methods and image processing commands that changes the image 
   System.out.println("Calling FlipViewPerspective"); 
   img.flipViewPerspective(true); 
 
   System.out.println("Calling RotateViewPerspective"); 
   img.rotateViewPerspective(90); 
 
   System.out.println("Calling FlipCommand"); 
   FlipCommand flip = new FlipCommand(true); 
   flip.run(img); 
 
   // Now disable firing the events and call the methods again 
   System.out.println("Disabling the events"); 
   img.disableEvents(); 
 
   System.out.println("Calling FlipViewPerspective"); 
   img.flipViewPerspective(true); 
 
   System.out.println("Calling RotateViewPerspective"); 
   img.rotateViewPerspective(90); 
 
   System.out.println("Calling FlipCommand while"); 
   flip.run(img); 
 
   // Re-enable the events and fire it manually 
   System.out.println("Re-enabling the events"); 
   img.enableEvents(); 
 
   System.out.println("Firing the event manually"); 
   RasterImageChangedFlags flags = RasterImageChangedFlags 
         .forValue(RasterImageChangedFlags.DATA | RasterImageChangedFlags.VIEW_PERSPECTIVE); 
   RasterImageChangedEvent e = new RasterImageChangedEvent(flags, 
         RasterImageChangedFlags.DATA | RasterImageChangedFlags.VIEW_PERSPECTIVE); 
 
   img.onChanged(e); 
 
   // Save it 
   codecs.save(img, srcFileName, RasterImageFormat.CMP, 0); 
 
   // Clean up 
   img.removeChangedListener(img_Changed); 
   img.dispose(); 
   codecs.dispose(); 
 
   assertTrue("file unsuccessfully saved to " + srcFileName, (new File(srcFileName)).exists()); 
   System.out.printf("File saved successfully to %s%n", srcFileName); 
} 
 
RasterImageChangedListener img_Changed = new RasterImageChangedListener() { 
 
   @Override 
   public void onImageChangedAlert(RasterImageChangedEvent arg0) { 
      System.out.printf("Changed: %s%n", arg0.getFlags()); 
   } 
 
};

Requirements

Target Platforms

Reference

RasterImageChangedEventArgs Members

Leadtools Namespace

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Help Version 23.0.2024.2.29

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies