/*
 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package org.graalvm.visualvm.lib.ui.swing;

import java.util.HashSet;
import java.util.Set;
import javax.swing.ButtonGroup;
import javax.swing.ButtonModel;

/**
 * Button group with AT LEAST one button selected.
 *
 * @author Jiri Sedlacek
 */
public class MultiButtonGroup extends ButtonGroup {

    private final Set<ButtonModel> selected = new HashSet();

    public void setSelected(ButtonModel m, boolean b) {
        if (b == false) {
            for (ButtonModel model : selected) {
                if (model.isSelected() && model != m) {
                    selected.remove(m);
                    return;
                }
            }
        } else {
            selected.add(m);
        }
    }

    public boolean isSelected(ButtonModel m) {
        return selected.contains(m);
    }

}
