DialogHandler.java :  » Testing » jacareto » jacareto » comp » Java Open Source

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jacareto » jacareto » comp » DialogHandler.java
/*
 * Jacareto Copyright (c) 2002-2005
 * Applied Computer Science Research Group, Darmstadt University of
 * Technology, Institute of Mathematics & Computer Science,
 * Ludwigsburg University of Education, and Computer Based
 * Learning Research Group, Aachen University. All rights reserved.
 *
 * Jacareto 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 of the License, or (at your option) any later version.
 *
 * Jacareto 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 Jacareto; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

package jacareto.comp;


import jacareto.system.Environment;

import java.awt.Component;
import java.awt.Dialog;

/**
 * This is a class which provides methods for dialogs.
 *
 * @author <a href="mailto:cspannagel@web.de">Christian Spannagel</a>
 * @version 1.0
 */
public class DialogHandler extends ContainerHandler {
    /**
     * Creates a new dialog handler.
     *
     * @param env the environment
     * @param components the components instance
     */
    public DialogHandler (Environment env, Components components) {
        super(env, components);
    }

    /**
     * Returns whether this handler is responsible for the given component. This class is
     * responsible for dialogs.
     *
     * @param component the component
     *
     * @return <code>true</code> if this handler is responsible for the given component, otherwise
     *         <code>false</code>
     */
    public boolean handlesComponent (Component component) {
        return (component != null) && component instanceof Dialog;
    }

    /**
     * Returns <code>null</code>. We do not want to get the frame the dialog belongs to here,
     * because a dialog is a window itself.
     *
     * @param component the component
     *
     * @return <code>null</code>
     */
    public Component getParent (Component component) {
        return null;
    }
}
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