/*
 * Copyright 2012-2017 Red Hat, Inc.
 *
 * This file is part of Thermostat.
 *
 * Thermostat 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 2, or (at your
 * option) any later version.
 *
 * Thermostat 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 Thermostat; see the file COPYING.  If not see
 * <http://www.gnu.org/licenses/>.
 *
 * Linking this code with other modules is making a combined work
 * based on this code.  Thus, the terms and conditions of the GNU
 * General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this code give
 * you permission to link this code with independent modules to
 * produce an executable, regardless of the license terms of these
 * independent modules, and to copy and distribute the resulting
 * executable under terms of your choice, provided that you also
 * meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module
 * which is not derived from or based on this code.  If you modify
 * this code, you may extend this exception to your version of the
 * library, but you are not obligated to do so.  If you do not wish
 * to do so, delete this exception statement from your version.
 */

package com.redhat.thermostat.client.swing.internal.accordion;

import javax.swing.event.EventListenerList;

class AccordionComponentController {

    protected EventListenerList listenerList;

    private AccordionComponent selectedComponent;
    
    public AccordionComponentController() {
        listenerList = new EventListenerList();
    }
    
    void setSelectedItem(AccordionComponent selectedComponent) {
        AccordionComponent oldSelected = this.selectedComponent;
        this.selectedComponent = selectedComponent;

        if (oldSelected != null) {
            oldSelected.setSelected(false);
        }

        if (selectedComponent != null) {
            selectedComponent.setSelected(true);
        }

        if (oldSelected != this.selectedComponent) {
            fireItemSelectedChanged(oldSelected, selectedComponent);
        }
    }

    void addAccordionItemSelectedChangeListener(AccordionItemSelectedChangeListener l) {
        listenerList.add(AccordionItemSelectedChangeListener.class, l);
    }
    
    void removeAccordionItemSelectedChangeListener(AccordionItemSelectedChangeListener l) {
        listenerList.remove(AccordionItemSelectedChangeListener.class, l);
    }
    
    private void fireItemSelectedChanged(AccordionComponent oldComp, AccordionComponent newComp) {
        Object[] listeners = listenerList.getListenerList();

        ItemSelectedEvent event = new ItemSelectedEvent(oldComp, newComp);
        for (int i = listeners.length - 2; i >= 0; i -= 2) {
            if (listeners[i] == AccordionItemSelectedChangeListener.class) {
                ((AccordionItemSelectedChangeListener) listeners[i + 1]).itemSelected(event);
            }
        }
    }
    
    AccordionComponent getSelectedComponent() {
        return selectedComponent;
    }
}