tim/prune/data/PhotoList.java

   1 package tim.prune.data;
   2
   3 import java.util.ArrayList;
   4
   5 /**
   6  * Class to hold a list of Photos
   7  */
   8 public class PhotoList
   9 {
  10         private ArrayList _photos = null;
  11
  12         /**
  13          * @return the number of photos in the list
  14          */
  15         public int getNumPhotos()
  16         {
  17                 if (_photos == null) return 0;
  18                 return _photos.size();
  19         }
  20
  21
  22         /**
  23          * Add a List of Photos
  24          * @param inList List containing Photo objects
  25          */
  26         public void addPhoto(Photo inPhoto)
  27         {
  28                 // Make sure array is initialised
  29                 if (_photos == null)
  30                 {
  31                         _photos = new ArrayList();
  32                 }
  33                 // Add the photo
  34                 if (inPhoto != null)
  35                 {
  36                         _photos.add(inPhoto);
  37                 }
  38         }
  39
  40
  41         /**
  42          * Checks if the specified Photo is already in the list
  43          * @param inPhoto Photo object to check
  44          * @return true if it's already in the list
  45          */
  46         public boolean contains(Photo inPhoto)
  47         {
  48                 // Check if we need to check
  49                 if (getNumPhotos() <= 0 || inPhoto == null || inPhoto.getFile() == null)
  50                         return false;
  51                 // Loop around photos in list
  52                 for (int i=0; i<getNumPhotos(); i++)
  53                 {
  54                         if (getPhoto(i) != null && getPhoto(i).equals(inPhoto))
  55                         {
  56                                 return true;
  57                         }
  58                 }
  59                 // not found
  60                 return false;
  61         }
  62
  63
  64         /**
  65          * Get the Photo at the given index
  66          * @param inIndex index number, starting at 0
  67          * @return specified Photo object
  68          */
  69         public Photo getPhoto(int inIndex)
  70         {
  71                 if (inIndex < 0 || inIndex >= getNumPhotos()) return null;
  72                 return (Photo) _photos.get(inIndex);
  73         }
  74
  75
  76         /**
  77          * Crop the photo list to the specified size
  78          * @param inIndex previous size
  79          */
  80         public void cropTo(int inIndex)
  81         {
  82                 if (inIndex <= 0)
  83                 {
  84                         // delete whole list
  85                         _photos.clear();
  86                 }
  87                 else
  88                 {
  89                         // delete photos to previous size
  90                         while (_photos.size() > inIndex)
  91                         {
  92                                 _photos.remove(_photos.size()-1);
  93                         }
  94                 }
  95         }
  96
  97         /**
  98          * @return array of file names
  99          */
 100         public String[] getNameList()
 101         {
 102                 String[] names = new String[getNumPhotos()];
 103                 for (int i=0; i<getNumPhotos(); i++)
 104                 {
 105                         names[i] = getPhoto(i).getFile().getName();
 106                 }
 107                 return names;
 108         }
 109 }