All Superinterfaces:

EventListener
```
public interface IIOReadProgressListener
extends EventListener
```
An interface used by ImageReader implementations to notify callers of their image and thumbnail reading methods of progress.
This interface receives general indications of decoding progress (via the imageProgress and thumbnailProgress methods), and events indicating when an entire image has been updated (via the imageStarted, imageComplete, thumbnailStarted and thumbnailComplete methods). Applications that wish to be informed of pixel updates as they happen (for example, during progressive decoding), should provide an IIOReadUpdateListener.

See Also:
IIOReadUpdateListener, ImageReader.addIIOReadProgressListener(javax.imageio.event.IIOReadProgressListener), ImageReader.removeIIOReadProgressListener(javax.imageio.event.IIOReadProgressListener)

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`imageComplete(ImageReader source)` Reports that the current image read operation has completed.
`void`	`imageProgress(ImageReader source, float percentageDone)` Reports the approximate degree of completion of the current `read` call of the associated `ImageReader`.
`void`	`imageStarted(ImageReader source, int imageIndex)` Reports that an image read operation is beginning.
`void`	`readAborted(ImageReader source)` Reports that a read has been aborted via the reader's `abort` method.
`void`	`sequenceComplete(ImageReader source)` Reports that a sequence of read operationshas completed.
`void`	`sequenceStarted(ImageReader source, int minIndex)` Reports that a sequence of read operations is beginning.
`void`	`thumbnailComplete(ImageReader source)` Reports that a thumbnail read operation has completed.
`void`	`thumbnailProgress(ImageReader source, float percentageDone)` Reports the approximate degree of completion of the current `getThumbnail` call within the associated `ImageReader`.
`void`	`thumbnailStarted(ImageReader source, int imageIndex, int thumbnailIndex)` Reports that a thumbnail read operation is beginning.

- Method Detail
  - sequenceStarted
```
void sequenceStarted(ImageReader source,
                   int minIndex)
```
    Reports that a sequence of read operations is beginning. ImageReader implementations are required to call this method exactly once from their readAll(Iterator) method.
    
    Parameters:
    source - the ImageReader object calling this method.
    minIndex - the index of the first image to be read.
  - sequenceComplete
```
void sequenceComplete(ImageReader source)
```
    Reports that a sequence of read operationshas completed. ImageReader implementations are required to call this method exactly once from their readAll(Iterator) method.
    
    Parameters:
    source - the ImageReader object calling this method.
  - imageStarted
```
void imageStarted(ImageReader source,
                int imageIndex)
```
    Reports that an image read operation is beginning. All ImageReader implementations are required to call this method exactly once when beginning an image read operation.
    
    Parameters:
    source - the ImageReader object calling this method.
    imageIndex - the index of the image being read within its containing input file or stream.
  - imageProgress
```
void imageProgress(ImageReader source,
                 float percentageDone)
```
    Reports the approximate degree of completion of the current read call of the associated ImageReader.
    The degree of completion is expressed as a percentage varying from 0.0F to 100.0F. The percentage should ideally be calculated in terms of the remaining time to completion, but it is usually more practical to use a more well-defined metric such as pixels decoded or portion of input stream consumed. In any case, a sequence of calls to this method during a given read operation should supply a monotonically increasing sequence of percentage values. It is not necessary to supply the exact values 0 and 100, as these may be inferred by the callee from other methods.
    Each particular ImageReader implementation may call this method at whatever frequency it desires. A rule of thumb is to call it around each 5 percent mark.
    
    Parameters:
    source - the ImageReader object calling this method.
    percentageDone - the approximate percentage of decoding that has been completed.
  - imageComplete
```
void imageComplete(ImageReader source)
```
    Reports that the current image read operation has completed. All ImageReader implementations are required to call this method exactly once upon completion of each image read operation.
    
    Parameters:
    source - the ImageReader object calling this method.
  - thumbnailStarted
```
void thumbnailStarted(ImageReader source,
                    int imageIndex,
                    int thumbnailIndex)
```
    Reports that a thumbnail read operation is beginning. All ImageReader implementations are required to call this method exactly once when beginning a thumbnail read operation.
    
    Parameters:
    source - the ImageReader object calling this method.
    imageIndex - the index of the image being read within its containing input file or stream.
    thumbnailIndex - the index of the thumbnail being read.
  - thumbnailProgress
```
void thumbnailProgress(ImageReader source,
                     float percentageDone)
```
    Reports the approximate degree of completion of the current getThumbnail call within the associated ImageReader. The semantics are identical to those of imageProgress.
    
    Parameters:
    source - the ImageReader object calling this method.
    percentageDone - the approximate percentage of decoding that has been completed.
  - thumbnailComplete
```
void thumbnailComplete(ImageReader source)
```
    Reports that a thumbnail read operation has completed. All ImageReader implementations are required to call this method exactly once upon completion of each thumbnail read operation.
    
    Parameters:
    source - the ImageReader object calling this method.
  - readAborted
```
void readAborted(ImageReader source)
```
    Reports that a read has been aborted via the reader's abort method. No further notifications will be given.
    
    Parameters:
    source - the ImageReader object calling this method.

Traduction non disponible

Les API Java ne sont pas encore traduites en français sur l'infobrol. Seule la version anglaise est disponible pour l'instant.

Version en cache

22/12/2024 15:38:09 Cette version de la page est en cache (à la date du 22/12/2024 15:38:09) afin d'accélérer le traitement. Vous pouvez activer le mode utilisateur dans le menu en haut pour afficher la dernère version de la page.

Document créé le 07/12/2006, dernière modification le 04/03/2020
Source du document imprimé : https://www.gaudry.be/java-api-rf-javax/imageio/event/iioreadprogresslistener.html

L'infobrol est un site personnel dont le contenu n'engage que moi. Le texte est mis à disposition sous licence CreativeCommons(BY-NC-SA). Plus d'info sur les conditions d'utilisation et sur l'auteur.

Références

Manuel PHP : https://docs.oracle.com, IIOReadProgressListener

Ces références et liens indiquent des documents consultés lors de la rédaction de cette page, ou qui peuvent apporter un complément d'information, mais les auteurs de ces sources ne peuvent être tenus responsables du contenu de cette page.
L'auteur de ce site est seul responsable de la manière dont sont présentés ici les différents concepts, et des libertés qui sont prises avec les ouvrages de référence. N'oubliez pas que vous devez croiser les informations de sources multiples afin de diminuer les risques d'erreurs.

Table des matières Haut

Interface IIOReadProgressListener

Method Summary

Method Detail

sequenceStarted

sequenceComplete

imageStarted

imageProgress

imageComplete

thumbnailStarted

thumbnailProgress

thumbnailComplete

readAborted

Références