package GUI;
import Batch.ImageUtils;import java.awt.Color;import java.awt.Dimension;import java.awt.Graphics;import java.beans.PropertyChangeEvent;import java.beans.PropertyChangeListener;import java.io.File;import javax.swing.BorderFactory;import javax.swing.ImageIcon;import javax.swing.JComponent;import javax.swing.JFileChooser;import javax.swing.border.Border;import javax.swing.border.TitledBorder;
public class ImagePreview extends JComponent implements PropertyChangeListener { ImageIcon thumbnail = null; File file = null; int thumbnailSize = 450; private JComponent parent; Dimension parentSize;
public ImagePreview(JFileChooser fc) { this.setPreferredSize(new Dimension(500, 700)); Border blackline = BorderFactory.createLineBorder(Color.black); TitledBorder title = BorderFactory.createTitledBorder(blackline, "Image Preview"); title.setTitleJustification(2); this.setBorder(title); this.parent = fc; fc.addPropertyChangeListener(this); }
public void loadImage() { if (this.file == null) { this.thumbnail = null; } else { ImageIcon tmpIcon = new ImageIcon(ImageUtils.openAsJavaImage(this.file.getPath())); if (tmpIcon != null) { int tmpIconWidth = tmpIcon.getIconWidth(); int tmpIconHeight = tmpIcon.getIconHeight(); if (tmpIconWidth > tmpIconHeight) { this.thumbnail = new ImageIcon(tmpIcon.getImage().getScaledInstance(this.thumbnailSize, tmpIconHeight * this.thumbnailSize / tmpIconWidth, 1)); }
if (tmpIconHeight > tmpIconWidth) { this.thumbnail = new ImageIcon(tmpIcon.getImage().getScaledInstance(tmpIconWidth * this.thumbnailSize / tmpIconHeight, this.thumbnailSize, 1)); } else { this.thumbnail = new ImageIcon(tmpIcon.getImage().getScaledInstance(this.thumbnailSize, this.thumbnailSize, 1)); } } } }
@Override public void propertyChange(PropertyChangeEvent e) { boolean update = false; String prop = e.getPropertyName(); if ("directoryChanged".equals(prop)) { this.file = null; update = true; } else if ("SelectedFileChangedProperty".equals(prop)) { this.file = (File)e.getNewValue(); if (this.file == null) { update = false; } else if (this.file.isFile()) { update = true; } else { update = false; } }
if (update) { this.thumbnail = null; if (this.isShowing()) { this.loadImage(); this.repaint(); } } }
@Override protected void paintComponent(Graphics g) { if (this.thumbnail == null) { this.loadImage(); }
if (this.thumbnail != null) { int x = this.getWidth() / 2 - this.thumbnail.getIconWidth() / 2; int y = this.getHeight() / 2 - this.thumbnail.getIconHeight() / 2; if (y < 0) { y = 2; }
if (x < 5) { x = 5; }
this.thumbnail.paintIcon(this, g, x, y); } }}
