Module java.desktop

Interface IIOReadProgressListener

    • 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 operations has 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.