Set table size to image size.

[xsaero00]

I am currently modifying DocBook InsertTable operation. One of the common tables to insert is a table that has mediaobject with imagedata as the body instead of the tgroup. I want to set the table width to the width of the image. I am having trouble getting the image width in Java. Currently I have:

TableInfo.java constructor

Code: Select all

          Image image = Toolkit.getDefaultToolkit().getImage(img_filename);

          MediaTracker mTracker = new MediaTracker(the_table_dialog_object);

          mTracker.addImage(image, 1);

          try

          {

              mTracker.waitForID(1);

          }

          catch(InterruptedException e){}

          

          image.getWidth(null); // returns -1 

          image.getHeight(null); // returns -1

Is there a utility class in Author API that I can use for finding out the image size?

[Radu]

Hi Mike,

I can give you the code which is used on our side to detect widths and heights for images which are supported by Java:

Code: Select all

 /**

   * Get an image reader for the specified extension.

   * @param is The input stream

   * @return  The image reader

   * 

   * @throws IOException 

   */

  public static ImageReader getImageReader(InputStream is) throws IOException {

    ImageReader imagereader = null;

    try {

      ImageInputStream imageStream = ImageIO.createImageInputStream(is);

      Iterator<ImageReader> iterator = ImageIO.getImageReaders(imageStream);

      if (iterator.hasNext()) {

        imagereader = iterator.next();

        imagereader.setInput(imageStream);

      }

    } catch(IOException ex) {

      ex.printStackTrace();

      throw ex;

    }

    return imagereader;

  }



 public static void main(String[] args) throws IOException {

   URL imageURL = ........;

    boolean oldUseCache = ImageIO.getUseCache();

    try {

      ImageIO.setUseCache(false);

      InputStream imageStream = imageURL.openStream();

      ImageReader reader = null;

      try {

        reader = getImageReader(imageStream);

        if (reader != null) {

          int width = reader.getWidth(0);

          int height = reader.getHeight(0);

        } 

      } finally {

        if(reader != null) {

          reader.dispose();

        }

        imageStream.close();

      }

    }finally {

      ImageIO.setUseCache(oldUseCache);

    }

  }

Regards,
Radu

[xsaero00]

Thank you. It works now. I am using SimpleImageInfo class I found on the web http://jaimonmathew.wordpress.com/2011/ ... imageinfo/. It supposed to be faster than ImageIO. To get the file object of the image I am using AuthorUtilAccess.locateFile()