Version 13, August 2011

[GpsPrune.git] / tim / prune / data / Photo.java

diff --git a/tim/prune/data/Photo.java b/tim/prune/data/Photo.java
index 52743f7a34659d40bd6aebb46b85759b0b524902..0c5d9e51da160610757b299c7c6eee0924cebee5 100644 (file)
--- a/tim/prune/data/Photo.java
+++ b/tim/prune/data/Photo.java
@@ -1,17 +1,24 @@
 package tim.prune.data;
 
+import java.awt.Dimension;
 import java.io.File;
 
+import javax.swing.ImageIcon;
+
 /**
  * Class to represent a photo and link to DataPoint
  */
-public class Photo
+public class Photo extends MediaObject
 {
-       /** File where photo is stored */
-       private File _file = null;
-       /** Associated DataPoint if correlated */
-       private DataPoint _dataPoint = null;
-
+       /** Size of original image */
+       private Dimension _size = null;
+       /** rotation flag (clockwise from 0 to 3) */
+       private int _rotation = 0;
+       // TODO: Need to store caption for image?
+       /** Bearing, if any */
+       private double _bearing = -1.0;
+       /** thumbnail for image (from exif) */
+       private byte[] _exifThumbnail = null;
 
        /**
         * Constructor
@@ -19,45 +26,143 @@ public class Photo
         */
        public Photo(File inFile)
        {
-               _file = inFile;
-               // TODO: Cache photo file contents to allow thumbnail preview
+               super(inFile, null);
+       }
+
+       /**
+        * Constructor using data, eg from zip file or URL
+        * @param inData data as byte array
+        * @param inName name of file from which it came
+        * @param inUrl url from which it came (or null)
+        */
+       public Photo(byte[] inData, String inName, String inUrl)
+       {
+               super(inData, inName, inUrl);
+       }
+
+       /**
+        * Calculate the size of the image (slow)
+        */
+       private void calculateSize()
+       {
+               ImageIcon icon = null;
+               if (_file != null)
+                       icon = new ImageIcon(_file.getAbsolutePath());
+               else
+                       icon = new ImageIcon(_data);
+               int width = icon.getIconWidth();
+               int height = icon.getIconHeight();
+               if (width > 0 && height > 0)
+               {
+                       _size = new Dimension(width, height);
+               }
+       }
+
+       /**
+        * @return size of image as Dimension object
+        */
+       public Dimension getSize()
+       {
+               if (_size == null) {
+                       calculateSize();
+               }
+               return _size;
+       }
+
+       /**
+        * @return width of the image, if known
+        */
+       public int getWidth()
+       {
+               if (getSize() == null) {return -1;}
+               return _size.width;
+       }
+
+       /**
+        * @return height of the image, if known
+        */
+       public int getHeight()
+       {
+               if (getSize() == null) {return -1;}
+               return _size.height;
        }
 
+       /**
+        * @return byte array of thumbnail data
+        */
+       public byte[] getExifThumbnail()
+       {
+               return _exifThumbnail;
+       }
 
        /**
-        * @return File object where photo resides
+        * @param inBytes byte array from exif
         */
-       public File getFile()
+       public void setExifThumbnail(byte[] inBytes)
        {
-               return _file;
+               _exifThumbnail = inBytes;
        }
 
+       /**
+        * Delete the cached data when the Photo is no longer needed
+        */
+       public void resetCachedData()
+       {
+               _size = null;
+               // remove thumbnail too
+       }
 
        /**
-        * Set the data point associated with the photo
-        * @param inPoint DataPoint with coordinates etc
+        * @param inRotation initial rotation value (from exif)
         */
-       public void setDataPoint(DataPoint inPoint)
+       public void setRotation(int inRotation)
        {
-               _dataPoint = inPoint;
+               if (inRotation >= 0 && inRotation <= 3) {
+                       _rotation = inRotation;
+               }
        }
 
        /**
-        * @return the DataPoint object
+        * Rotate the image by 90 degrees
+        * @param inRight true to rotate right, false for left
         */
-       public DataPoint getDataPoint()
+       public void rotate(boolean inRight)
        {
-               return _dataPoint;
+               int dir = inRight?1:3;
+               _rotation = (_rotation + dir) % 4;
        }
 
        /**
-        * Check if a Photo object refers to the same File as another
-        * @param inOther other Photo object
-        * @return true if the Files are the same
+        * @return rotation status
         */
-       public boolean equals(Photo inOther)
+       public int getRotationDegrees()
        {
-               return (inOther != null && inOther.getFile() != null && getFile() != null
-                       && inOther.getFile().equals(getFile()));
+               return _rotation * 90;
+       }
+
+       /**
+        * @return a new image icon for the whole image
+        */
+       public ImageIcon createImageIcon()
+       {
+               if (_file != null) {
+                       return new ImageIcon(_file.getAbsolutePath());
+               }
+               if (_data != null) {
+                       return new ImageIcon(_data);
+               }
+               return null;
+       }
+
+       /**
+        * @param inValue bearing in degrees, 0 to 360
+        */
+       public void setBearing(double inValue) {
+               _bearing = inValue;
+       }
+
+       /** @return bearing in degrees */
+       public double getBearing() {
+               return _bearing;
        }
 }