/*
 * Java ATK Wrapper for GNOME
 * Copyright (C) 2009 Sun Microsystems Inc.
 * Copyright (C) 2015 Magdalen Berns <m.berns@thismagpie.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

package org.GNOME.Accessibility;

import javax.accessibility.*;
import java.lang.ref.WeakReference;

public class AtkValue {

	WeakReference<AccessibleValue> _acc_value;

	public AtkValue (AccessibleContext ac) {
		super();
		this._acc_value = new WeakReference<AccessibleValue>(ac.getAccessibleValue());
	}

	public static AtkValue createAtkValue(AccessibleContext ac){
		return AtkUtil.invokeInSwing ( () -> { return new AtkValue(ac); }, null);
	}

	public Number get_current_value () {
		AccessibleValue acc_value = _acc_value.get();
		if (acc_value == null)
			return 0.0;

		return AtkUtil.invokeInSwing ( () -> { return acc_value.getCurrentAccessibleValue(); }, 0.0);
	}

	public double getMaximumValue () {
		AccessibleValue acc_value = _acc_value.get();
		if (acc_value == null)
			return 0.0;

		return AtkUtil.invokeInSwing ( () -> { return acc_value.getMaximumAccessibleValue().doubleValue(); }, 0.0);
	}

	public double getMinimumValue () {
		AccessibleValue acc_value = _acc_value.get();
		if (acc_value == null)
			return 0.0;

		return AtkUtil.invokeInSwing ( () -> { return acc_value.getMinimumAccessibleValue().doubleValue(); }, 0.0);
	}

	public void setValue (Number n) {
		AccessibleValue acc_value = _acc_value.get();
		if (acc_value == null)
			return;

		AtkUtil.invokeInSwing( () -> { acc_value.setCurrentAccessibleValue(n); });
	}

	public double getIncrement() {
		return Double.MIN_VALUE;
	}
}