Listbox.java

/*
 *  This file is part of the Haven & Hearth game client.
 *  Copyright (C) 2009 Fredrik Tolf <fredrik@dolda2000.com>, and
 *                     Björn Johannessen <johannessen.bjorn@gmail.com>
 *
 *  Redistribution and/or modification of this file is subject to the
 *  terms of the GNU Lesser General Public License, version 3, as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  Other parts of this source tree adhere to other copying
 *  rights. Please see the file `COPYING' in the root directory of the
 *  source tree for details.
 *
 *  A copy the GNU Lesser General Public License is distributed along
 *  with the source tree of which this file is a part in the file
 *  `doc/LPGL-3'. If it is missing for any reason, please see the Free
 *  Software Foundation's website at <http://www.fsf.org/>, or write
 *  to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 *  Boston, MA 02111-1307 USA
 */

package haven;

import java.awt.Color;
import java.awt.event.KeyEvent;
import java.util.LinkedList;
import java.util.List;

public class Listbox extends Widget {
	public List<Option> opts;
	public int chosen;

	static {
		Widget.addtype("lb", new WidgetFactory() {
			public Widget create(Coord c, Widget parent, Object[] args) {
				List<Option> opts = new LinkedList<Option>();
				for (int i = 1; i < args.length; i += 2)
					opts.add(new Option((String) args[i], (String) args[i + 1]));
				return (new Listbox(c, (Coord) args[0], parent, opts));
			}
		});
	}

	public static class Option {
		public String name, disp;
		int y1, y2;

		public Option(String name, String disp) {
			this.name = name;
			this.disp = disp;
		}
	}

	public void draw(GOut g) {
		int y = 0, i = 0;
		for (Option o : opts) {
			Color c;
			if (i++ == chosen)
				c = FlowerMenu.pink;
			else
				c = Color.BLACK;
			Text t = Text.render(o.disp, c);
			o.y1 = y;
			g.image(t.tex(), new Coord(0, y));
			y += t.sz().y;
			o.y2 = y;
		}
	}

	public Listbox(Coord c, Coord sz, Widget parent, List<Option> opts) {
		super(c, sz, parent);
		this.opts = opts;
		chosen = 0;
		setcanfocus(true);
	}

	static List<Option> makelist(Option[] opts) {
		List<Option> ol = new LinkedList<Option>();
		for (Option o : opts)
			ol.add(o);
		return (ol);
	}

	public Listbox(Coord c, Coord sz, Widget parent, Option[] opts) {
		this(c, sz, parent, makelist(opts));
	}

	public void sendchosen() {
		wdgmsg("chose", opts.get(chosen).name);
	}

	public boolean mousedown(Coord c, int button) {
		parent.setfocus(this);
		int i = 0;
		for (Option o : opts) {
			if ((c.y >= o.y1) && (c.y <= o.y2))
				break;
			i++;
		}
		if (i < opts.size()) {
			chosen = i;
			sendchosen();
		}
		return (true);
	}

	public boolean keydown(KeyEvent e) {
		if ((e.getKeyCode() == KeyEvent.VK_DOWN) && (chosen < opts.size() - 1)) {
			chosen++;
			sendchosen();
		} else if ((e.getKeyCode() == KeyEvent.VK_UP) && (chosen > 0)) {
			chosen--;
			sendchosen();
		}
		return (true);
	}
}