Moved source into separate src directory due to popular request

[GpsPrune.git] / src / tim / prune / gui / PhotoThumbnail.java

diff --git a/src/tim/prune/gui/PhotoThumbnail.java b/src/tim/prune/gui/PhotoThumbnail.java
new file mode 100644 (file)
index 0000000..458ee8d
--- /dev/null
+++ b/src/tim/prune/gui/PhotoThumbnail.java
@@ -0,0 +1,167 @@
+package tim.prune.gui;
+
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.Image;
+import javax.swing.ImageIcon;
+import javax.swing.JPanel;
+import javax.swing.SwingUtilities;
+
+import tim.prune.I18nManager;
+import tim.prune.data.Photo;
+
+/**
+ * GUI component for showing photo thumbnail
+ */
+public class PhotoThumbnail extends JPanel implements Runnable
+{
+       private Photo _photo = null;
+       private Image _thumbnail = null;
+       private boolean _loadingImage = false;
+       private boolean _loadFailed = false;
+       private boolean _inPanel = false;
+       /** String to show before photo is loaded */
+       private static final String LOADING_STRING = I18nManager.getText("details.photo.loading") + " ...";
+
+
+       /**
+        * Constructor
+        */
+       public PhotoThumbnail()
+       {
+               this(true);
+       }
+
+       /**
+        * Constructor
+        * @param inPanel true if thumbnail is inside panel
+        */
+       public PhotoThumbnail(boolean inPanel)
+       {
+               setOpaque(true);
+               _inPanel = inPanel;
+       }
+
+       /**
+        * Set the Photo
+        * @param inPhoto Photo object to show thumbnail for
+        */
+       public void setPhoto(Photo inPhoto)
+       {
+               // Check whether the photo has changed
+               if (_photo != inPhoto)
+               {
+                       _photo = inPhoto;
+                       _thumbnail = null;
+                       _loadFailed = false;
+               }
+               repaint();
+       }
+
+       /**
+        * Force a refresh / reload
+        */
+       public void refresh()
+       {
+               _thumbnail = null;
+               _loadFailed = false;
+       }
+
+       /**
+        * Override paint method
+        * @see javax.swing.JComponent#paint(java.awt.Graphics)
+        */
+       public void paint(Graphics inG)
+       {
+               super.paint(inG);
+               if (_photo != null)
+               {
+                       // read thumbnail in separate thread
+                       if (_thumbnail == null && !_loadingImage && !_loadFailed)
+                       {
+                               _loadingImage = true;
+                               new Thread(this).start();
+                       }
+                       // if loading, display message
+                       if (_loadingImage)
+                       {
+                               inG.setColor(Color.BLACK);
+                               inG.drawString(LOADING_STRING, 10, 30);
+                       }
+                       else if (_thumbnail != null && !_loadFailed)
+                       {
+                               // Copy scaled, smoothed (and rotated) image into scaled
+                               int usableWidth = getParent().getWidth()-10;
+                               int usableHeight = (_inPanel?usableWidth:getHeight()-10);
+                               Image scaled = ImageUtils.rotateImage(_thumbnail, usableWidth, usableHeight, _photo.getRotationDegrees());
+                               int scaleWidth = scaled.getWidth(null);
+                               int scaleHeight = scaled.getHeight(null);
+                               // Draw scaled / rotated image to component
+                               int horizOffset = (getWidth() - scaleWidth) / 2;
+                               int vertOffset = (getHeight() - scaleHeight) / 2;
+                               inG.drawImage(scaled, horizOffset, vertOffset, scaleWidth, scaleHeight, null);
+                               // Special resize behaviour when locked inside details panel
+                               if (_inPanel && (getHeight() < getWidth() || getHeight() > usableWidth))
+                               {
+                                       Dimension newsize = new Dimension(usableWidth, usableWidth);
+                                       setPreferredSize(newsize);
+                                       setSize(newsize);
+                                       invalidate();
+                                       // Schedule a relayout because the size has changed
+                                       SwingUtilities.invokeLater(new Runnable() {
+                                               public void run() {
+                                                       try {Thread.sleep(200);} catch (InterruptedException e) {}
+                                                       getParent().getParent().getParent().validate();
+                                               }
+                                       });
+                               }
+                       }
+               }
+       }
+
+
+       /**
+        * Run method, for loading image in separate thread
+        * @see java.lang.Runnable#run()
+        */
+       public void run()
+       {
+               if (_inPanel)
+               {
+                       _thumbnail = null;
+                       // try to use exif thumbnail
+                       if (_photo.getExifThumbnail() != null) {
+                               // Use exif thumbnail
+                               Image image = new ImageIcon(_photo.getExifThumbnail()).getImage();
+                               _thumbnail = ImageUtils.createScaledImage(image, image.getWidth(null), image.getHeight(null));
+                               image = null;
+                       }
+                       // Maybe there's no thumbnail, maybe the load of the thumbnail failed
+                       if (_thumbnail == null)
+                       {
+                               // no exif thumbnail available, going to have to read whole thing
+                               int picWidth = _photo.getWidth();
+                               int picHeight = _photo.getHeight();
+                               if (picWidth > -1 && picHeight > -1)
+                               {
+                                       // Just set a "reasonable" thumbnail size for now
+                                       final int DEFAULT_THUMB_SIZE = 400;
+                                       // calculate maximum thumbnail size
+                                       Dimension thumbSize = ImageUtils.getThumbnailSize(picWidth, picHeight, DEFAULT_THUMB_SIZE, DEFAULT_THUMB_SIZE);
+                                       // Make icon to load image into
+                                       Image image = _photo.createImageIcon().getImage();
+                                       // save scaled, smoothed thumbnail for reuse
+                                       _thumbnail = ImageUtils.createScaledImage(image, thumbSize.width, thumbSize.height);
+                                       image = null;
+                               }
+                               else _loadFailed = true;
+                       }
+               }
+               else {
+                       _thumbnail = _photo.createImageIcon().getImage();
+               }
+               _loadingImage = false;
+               repaint();
+       }
+}