tim/prune/load/PhotoMeasurer.java

   1 package tim.prune.load;
   2
   3 import tim.prune.data.Photo;
   4 import tim.prune.data.PhotoList;
   5
   6 /**
   7  * This class starts a new thread to preload image sizes
   8  * TODO: # Cache small image thumbnails too?
   9  */
  10 public class PhotoMeasurer implements Runnable
  11 {
  12         /** PhotoList to loop through */
  13         private PhotoList _photoList = null;
  14
  15
  16         /**
  17          * Constructor
  18          * @param inPhotoList photo list to loop through
  19          */
  20         public PhotoMeasurer(PhotoList inPhotoList)
  21         {
  22                 _photoList = inPhotoList;
  23         }
  24
  25
  26         /**
  27          * Start off the process to measure the photo sizes
  28          */
  29         public void measurePhotos()
  30         {
  31                 // check if any photos in list
  32                 if (_photoList != null && _photoList.getNumPhotos() > 0)
  33                 {
  34                         // start new thread
  35                         new Thread(this).start();
  36                 }
  37         }
  38
  39
  40         /**
  41          * Run method called in new thread
  42          */
  43         public void run()
  44         {
  45                 try
  46                 {
  47                         // loop over all photos in list
  48                         for (int i=0; i<_photoList.getNumPhotos(); i++)
  49                         {
  50                                 Photo photo = _photoList.getPhoto(i);
  51                                 if (photo != null)
  52                                 {
  53                                         // call get size method which will calculate it if necessary
  54                                         photo.getSize();
  55                                 }
  56                         }
  57                 }
  58                 catch (ArrayIndexOutOfBoundsException obe) {} // ignore, must have been changed by other thread
  59         }
  60 }