tim/prune/data/Photo.java

   1 package tim.prune.data;
   2
   3 import java.awt.Dimension;
   4 import java.io.File;
   5
   6 import javax.swing.ImageIcon;
   7
   8 /**
   9  * Class to represent a photo and link to DataPoint
  10  */
  11 public class Photo extends MediaFile
  12 {
  13         /** Size of original image */
  14         private Dimension _size = null;
  15         /** rotation flag (clockwise from 0 to 3) */
  16         private int _rotation = 0;
  17         // TODO: Need to store caption for image?
  18         // thumbnail for image (from exif)
  19         private byte[] _exifThumbnail = null;
  20
  21         /**
  22          * Constructor
  23          * @param inFile File object for photo
  24          */
  25         public Photo(File inFile)
  26         {
  27                 super(inFile, null);
  28         }
  29
  30         /**
  31          * Calculate the size of the image (slow)
  32          */
  33         private void calculateSize()
  34         {
  35                 ImageIcon icon = new ImageIcon(_file.getAbsolutePath());
  36                 int width = icon.getIconWidth();
  37                 int height = icon.getIconHeight();
  38                 if (width > 0 && height > 0)
  39                 {
  40                         _size = new Dimension(width, height);
  41                 }
  42         }
  43
  44         /**
  45          * @return size of image as Dimension object
  46          */
  47         public Dimension getSize()
  48         {
  49                 if (_size == null) {
  50                         calculateSize();
  51                 }
  52                 return _size;
  53         }
  54
  55         /**
  56          * @return width of the image, if known
  57          */
  58         public int getWidth()
  59         {
  60                 if (_size == null)
  61                 {
  62                         calculateSize();
  63                         if (_size == null) {return -1;}
  64                 }
  65                 return _size.width;
  66         }
  67
  68         /**
  69          * @return height of the image, if known
  70          */
  71         public int getHeight()
  72         {
  73                 if (_size == null)
  74                 {
  75                         calculateSize();
  76                         if (_size == null) {return -1;}
  77                 }
  78                 return _size.height;
  79         }
  80
  81         /**
  82          * @return byte array of thumbnail data
  83          */
  84         public byte[] getExifThumbnail()
  85         {
  86                 return _exifThumbnail;
  87         }
  88
  89         /**
  90          * @param inBytes byte array from exif
  91          */
  92         public void setExifThumbnail(byte[] inBytes)
  93         {
  94                 _exifThumbnail = inBytes;
  95         }
  96
  97         /**
  98          * Delete the cached data when the Photo is no longer needed
  99          */
 100         public void resetCachedData()
 101         {
 102                 _size = null;
 103                 // remove thumbnail too
 104         }
 105
 106         /**
 107          * @param inRotation initial rotation value (from exif)
 108          */
 109         public void setRotation(int inRotation)
 110         {
 111                 if (inRotation >= 0 && inRotation <= 3) {
 112                         _rotation = inRotation;
 113                 }
 114         }
 115
 116         /**
 117          * Rotate the image by 90 degrees
 118          * @param inRight true to rotate right, false for left
 119          */
 120         public void rotate(boolean inRight)
 121         {
 122                 int dir = inRight?1:3;
 123                 _rotation = (_rotation + dir) % 4;
 124         }
 125
 126         /**
 127          * @return rotation status
 128          */
 129         public int getRotationDegrees()
 130         {
 131                 return _rotation * 90;
 132         }
 133 }