/*******************************************************************************
 * 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.draw.toolbar;

import java.util.ArrayList;
import java.util.List;

public abstract class AbstractToolbarModel implements ToolbarModel {
	private List<ToolbarModelListener> listeners;

	public AbstractToolbarModel() {
		listeners = new ArrayList<ToolbarModelListener>();
	}

	public void addToolbarModelListener(ToolbarModelListener listener) {
		listeners.add(listener);
	}

	protected void fireToolbarAppearanceChanged() {
		ToolbarModelEvent event = new ToolbarModelEvent(this);
		for (ToolbarModelListener listener : listeners) {
			listener.toolbarAppearanceChanged(event);
		}
	}

	protected void fireToolbarContentsChanged() {
		ToolbarModelEvent event = new ToolbarModelEvent(this);
		for (ToolbarModelListener listener : listeners) {
			listener.toolbarContentsChanged(event);
		}
	}

	public abstract List<ToolbarItem> getItems();

	public abstract boolean isSelected(ToolbarItem item);

	public abstract void itemSelected(ToolbarItem item);

	public void removeToolbarModelListener(ToolbarModelListener listener) {
		listeners.remove(listener);
	}
}