/* 
 * This file is part of the PDF Split And Merge source code
 * Created on 07/dic/2014
 * Copyright 2013-2014 by Andrea Vacondio (andrea.vacondio@gmail.com).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as 
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.pdfsam.ui.commons;

import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;

/**
 * {@link ChangeListener} with a toggle that can be used to enabdle and disable it.
 * 
 * @author Andrea Vacondio
 *
 */
public abstract class ToggleChangeListener<T> implements ChangeListener<T> {
    private boolean disabled = false;

    @Override
    public final void changed(ObservableValue<? extends T> observable, T oldValue, T newValue) {
        if (!disabled) {
            onChanged(observable, oldValue, newValue);
        }
    }

    public void disabled(boolean disabled) {
        this.disabled = disabled;
    }

    public boolean disabled() {
        return disabled;
    }

    public abstract void onChanged(ObservableValue<? extends T> observable, T oldValue, T newValue);
}
