X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fgui%2FPhotoThumbnail.java;fp=src%2Ftim%2Fprune%2Fgui%2FPhotoThumbnail.java;h=458ee8d84d866945d92d4cf51fb2b1da83ee5cd4;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/gui/PhotoThumbnail.java b/src/tim/prune/gui/PhotoThumbnail.java
new file mode 100644
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();
+	}
+}