/*******************************************************************************
 * This file is part of logisim-evolution.
 *
 *   logisim-evolution is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   logisim-evolution 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.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with logisim-evolution.  If not, see <http://www.gnu.org/licenses/>.
 *
 *   Original code by Carl Burch (http://www.cburch.com), 2011.
 *   Subsequent modifications by :
 *     + Haute École Spécialisée Bernoise
 *       http://www.bfh.ch
 *     + Haute École du paysage, d'ingénierie et d'architecture de Genève
 *       http://hepia.hesge.ch/
 *     + Haute École d'Ingénierie et de Gestion du Canton de Vaud
 *       http://www.heig-vd.ch/
 *   The project is currently maintained by :
 *     + REDS Institute - HEIG-VD
 *       Yverdon-les-Bains, Switzerland
 *       http://reds.heig-vd.ch
 *******************************************************************************/

package com.cburch.logisim.gui.opts;

import java.awt.Component;
import java.awt.Graphics;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.AbstractListModel;
import javax.swing.DefaultListCellRenderer;
import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.ListSelectionModel;

import com.cburch.logisim.comp.ComponentDrawContext;
import com.cburch.logisim.data.AttributeEvent;
import com.cburch.logisim.data.AttributeListener;
import com.cburch.logisim.file.ToolbarData;
import com.cburch.logisim.file.ToolbarData.ToolbarListener;
import com.cburch.logisim.prefs.AppPreferences;
import com.cburch.logisim.tools.Tool;

@SuppressWarnings({ "serial", "rawtypes" })
class ToolbarList extends JList {
	private static class ListRenderer extends DefaultListCellRenderer {
		@Override
		public Component getListCellRendererComponent(JList list, Object value,
				int index, boolean isSelected, boolean cellHasFocus) {
			Component ret;
			Icon icon;
			if (value instanceof Tool) {
				Tool t = (Tool) value;
				ret = super.getListCellRendererComponent(list,
						t.getDisplayName(), index, isSelected, cellHasFocus);
				icon = new ToolIcon(t);
			} else if (value == null) {
				ret = super.getListCellRendererComponent(list, "---", index,
						isSelected, cellHasFocus);
				icon = null;
			} else {
				ret = super.getListCellRendererComponent(list,
						value.toString(), index, isSelected, cellHasFocus);
				icon = null;
			}
			if (ret instanceof JLabel) {
				((JLabel) ret).setIcon(icon);
			}
			return ret;
		}
	}

	private class Model extends AbstractListModel implements ToolbarListener,
			AttributeListener, PropertyChangeListener {
		public void attributeListChanged(AttributeEvent e) {
		}

		public void attributeValueChanged(AttributeEvent e) {
			repaint();
		}

		public Object getElementAt(int index) {
			return base.get(index);
		}

		public int getSize() {
			return base.size();
		}

		public void propertyChange(PropertyChangeEvent event) {
			if (AppPreferences.GATE_SHAPE.isSource(event)) {
				repaint();
			}
		}

		public void toolbarChanged() {
			fireContentsChanged(this, 0, getSize());
		}
	}

	private static class ToolIcon implements Icon {
		private Tool tool;

		ToolIcon(Tool tool) {
			this.tool = tool;
		}

		public int getIconHeight() {
			return 20;
		}

		public int getIconWidth() {
			return 20;
		}

		public void paintIcon(Component comp, Graphics g, int x, int y) {
			Graphics gNew = g.create();
			tool.paintIcon(new ComponentDrawContext(comp, null, null, g, gNew),
					x + 2, y + 2);
			gNew.dispose();
		}
	}

	private ToolbarData base;
	private Model model;

	@SuppressWarnings("unchecked")
	public ToolbarList(ToolbarData base) {
		this.base = base;
		this.model = new Model();

		setModel(model);
		setCellRenderer(new ListRenderer());
		setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

		AppPreferences.GATE_SHAPE.addPropertyChangeListener(model);
		base.addToolbarListener(model);
		base.addToolAttributeListener(model);
	}

	public void localeChanged() {
		model.toolbarChanged();
	}
}