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Slick 2D sprite packer
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package org.newdawn.slick.tools.packulike;

import java.awt.Component;
import java.awt.Font;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

import javax.swing.DefaultComboBoxModel;
import javax.swing.DefaultListCellRenderer;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSpinner;
import javax.swing.ListSelectionModel;
import javax.swing.SpinnerNumberModel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.filechooser.FileFilter;

/**
 * A simple GUI on the front of the packing tool
 * 
 * @author kevin
 */
public class Packer extends JFrame {
	/** The panel showing the currently generated sprite sheet */
	private SheetPanel sheetPanel;
	/** The sprites currently displayed */
	private DefaultListModel sprites = new DefaultListModel();
	/** The visual list of the sprites */
	private JList list = new JList(sprites);
	/** The width of the texture being generated */
	private int twidth;
	/** The height of the texture being generated */
	private int theight;
	
	/** The width texture sizes model */
	private DefaultComboBoxModel sizes = new DefaultComboBoxModel();
	/** The height texture sizes model */
	private DefaultComboBoxModel sizes2 = new DefaultComboBoxModel();
	/** The visual selection for texture width */
	private JComboBox widths = new JComboBox(sizes);
	/** The visual selection for texture height */
	private JComboBox heights = new JComboBox(sizes2);
	/** The visual selection for border size */
	private JSpinner border = new JSpinner(new SpinnerNumberModel(0,0,50,1));
	
	/** The chooser used to select sprites */
	private JFileChooser chooser = new JFileChooser(".");
	/** The chooser used to save the sprite sheet */
	private JFileChooser saveChooser = new JFileChooser(".");
	/** The packing tool */
	private Pack pack = new Pack();
	
	/**
	 * Create the new GUI for packer
	 */
	public Packer() {
		super("Pack-U-Like");
		
		saveChooser.setFileFilter(new FileFilter() {
			public boolean accept(File f) {
				if (f.isDirectory()) {
					return true;
				}
				
				return (f.getName().endsWith(".png"));
			}

			public String getDescription() {
				return "PNG Images (*.png)";
			}
			
		});
		chooser.setMultiSelectionEnabled(true);
		chooser.setFileFilter(new FileFilter() {
			public boolean accept(File f) {
				if (f.isDirectory()) {
					return true;
				}
				
				return (f.getName().endsWith(".png") ||
						f.getName().endsWith(".jpg") ||
						f.getName().endsWith(".gif"));
			}

			public String getDescription() {
				return "Images (*.jpg, *.png, *.gif)";
			}
			
		});
		
		sizes.addElement(new Integer(64));
		sizes.addElement(new Integer(128));
		sizes.addElement(new Integer(256));
		sizes.addElement(new Integer(512));
		sizes.addElement(new Integer(1024));
		sizes.addElement(new Integer(2048));
		sizes2.addElement(new Integer(64));
		sizes2.addElement(new Integer(128));
		sizes2.addElement(new Integer(256));
		sizes2.addElement(new Integer(512));
		sizes2.addElement(new Integer(1024));
		sizes2.addElement(new Integer(2048));
		
		JMenuBar bar = new JMenuBar();
		JMenu file = new JMenu("File");
		bar.add(file);
		JMenuItem save = new JMenuItem("Save");
		file.add(save);
		file.addSeparator();
		JMenuItem quit = new JMenuItem("Quit");
		file.add(quit);
		save.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				save();
			}
		});
		quit.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				System.exit(0);
			}
		});
		
		setJMenuBar(bar);
		JPanel panel = new JPanel();
		panel.setLayout(null);
	
		sheetPanel = new SheetPanel(this);
		JScrollPane pane = new JScrollPane(sheetPanel);
		pane.setBounds(5,5,530,530);
		JScrollPane listScroll = new JScrollPane(list);
		listScroll.setBounds(540,5,200,350);
		list.addListSelectionListener(new ListSelectionListener() {

			public void valueChanged(ListSelectionEvent e) {
				Object[] values = list.getSelectedValues();
				ArrayList sprites = new ArrayList();
				for (int i=0;i