CodecsLoadAsyncCompletedEventArgs Constructor

Summary

Creates a new instance of the CodecsLoadAsyncCompletedEventArgs with the specified parameters.

Syntax

C++/CLI

Python

public CodecsLoadAsyncCompletedEventArgs( 
   RasterImage image, 
   Uri uri, 
   Stream stream, 
   string fileName, 
   Exception error, 
   bool cancelled, 
   object userState 
)

public: 
CodecsLoadAsyncCompletedEventArgs(  
   RasterImage^ image, 
   Uri^ uri, 
   Stream^ stream, 
   String^ fileName, 
   Exception^ error, 
   bool cancelled, 
   Object^ userState 
)

__init__(self,image,uri,stream,fileName,error,cancelled,userState) # Overloaded constructor

Parameters

image
The RasterImage object instance being used.

uri
The Uri this asynchronous operation is using.

stream
The Stream this asynchronous operation is using.

fileName
The file name this asynchronous operation is using.

error
Any error that occurred during the asynchronous operation.

cancelled
A value indicating whether the asynchronous operation was canceled.

userState
The optional user-supplied state object passed to the RasterCodecs.LoadAsync method that initialized the construction of this object.

Remarks

NOTE: This topic is part of RasterCodecs Async support using the .NET System.ComponentMode.AsyncOperation model. For .NET async/await support this type/member is not used. Instead, refer to RasterCodecs Async Operations.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
public void LoadAsyncCompletedExample() 
{ 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   Uri uri = new Uri(srcFileName); 
 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // Now load the image asynchronously 
   codecs.LoadAsyncCompleted += new EventHandler<CodecsLoadAsyncCompletedEventArgs>(LoadAsyncCompletedExample_LoadAsyncCompleted); 
   object rasterImageObject = codecs.LoadAsync(uri, null); 
 
   // Notice that the returned rasterImageObject is a RasterImage with IsLoading set to true at this point 
   // The IsLoading will be false (and hence, the object will be usable) when the LoadAsyncCompleteted 
   // fires. 
} 
 
private void LoadAsyncCompletedExample_LoadAsyncCompleted(object sender, CodecsLoadAsyncCompletedEventArgs e) 
{ 
   if (e.Cancelled) 
   { 
      Debug.WriteLine("User canceled"); 
   } 
   else if (e.Error != null) 
   { 
      Debug.WriteLine("Error: " + e.Error.Message); 
   } 
   else 
   { 
      // Everything is OK, get the image 
      RasterImage image = e.Image; 
      Debug.WriteLine("Image at {0} loaded OK, size: {1} by {2}", e.Uri, image.Width, image.Height); 
      image.Dispose(); 
   } 
 
   // Unsubscribe to the event and dispose the RasterCodecs object 
   RasterCodecs codecs = sender as RasterCodecs; 
   codecs.LoadAsyncCompleted -= new EventHandler<CodecsLoadAsyncCompletedEventArgs>(LoadAsyncCompletedExample_LoadAsyncCompleted); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.*; 
import java.net.*; 
import java.nio.file.Paths; 
import java.util.*; 
import java.time.Instant; 
import java.time.Duration; 
 
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.codecs.RasterCodecs.FeedCallbackThunk; 
import leadtools.drawing.internal.*; 
import leadtools.imageprocessing.*; 
import leadtools.imageprocessing.color.ChangeIntensityCommand; 
import leadtools.svg.*; 
 
 
public void loadAsyncCompletedExample() throws IOException, URISyntaxException { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp"); 
   URI uri = Paths.get(srcFileName).toUri(); 
 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // Now load the image asynchronously 
   codecs.addLoadAsyncCompletedListener(loadAsyncCompletedExampleLoadAsyncCompleted); 
   ILeadStream uriStream = LeadStreamFactory.create(uri); 
 
   assertTrue("Check that URI exists", uri != null); 
   System.out.println("The URI exists"); 
 
   uriStream.close(); 
} 
 
CodecsLoadAsyncCompletedListener loadAsyncCompletedExampleLoadAsyncCompleted = new CodecsLoadAsyncCompletedListener() { 
 
   @Override 
   public void onLoadAsyncCompleted(CodecsLoadAsyncCompletedEvent e) { 
      if (e.getCancelled()) { 
         System.out.println("User canceled"); 
      } else if (e.getError() != null) { 
         System.out.println("Error: " + e.getError().getMessage()); 
      } else { 
         // Everything is OK, get the image 
         RasterImage image = e.getImage(); 
         System.out.printf("Image loaded OK, size: %s by %s%n", image.getWidth(), image.getHeight()); 
         image.dispose(); 
      } 
 
      // Unsubscribe to the event and dispose the RasterCodecs object 
      RasterCodecs codecs = (RasterCodecs) e.getSource(); 
      codecs.removeLoadAsyncCompletedListener(loadAsyncCompletedExampleLoadAsyncCompleted); 
      codecs.dispose(); 
   } 
 
};

Requirements

Target Platforms

Reference

CodecsLoadAsyncCompletedEventArgs Class

CodecsLoadAsyncCompletedEventArgs Members

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