/*

 * Copyright (c) 1997, 2005, 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

 * or visit www.oracle.com if you need additional information or have any

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package com.sun.java.swing.plaf.motif;

import sun.swing.SwingUtilities2;

import javax.swing.*;

import javax.swing.event.*;

import javax.swing.border.*;

import java.awt.Color;

import java.awt.Component;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.Insets;

import java.awt.LayoutManager;

import java.awt.Point;

import java.awt.Rectangle;

import java.awt.event.*;

import javax.swing.plaf.*;

import javax.swing.plaf.basic.BasicPopupMenuUI;

/**

 * A Motif L&F implementation of PopupMenuUI.

 * <p>

 * <strong>Warning:</strong>

 * Serialized objects of this class will not be compatible with

 * future Swing releases.  The current serialization support is appropriate

 * for short term storage or RMI between applications running the same

 * version of Swing.  A future release of Swing will provide support for

 * long term persistence.

 *

 * @author Georges Saab

 * @author Rich Schiavi

 */

public class MotifPopupMenuUI extends BasicPopupMenuUI {

    private static Border border = null;

    private Font titleFont = null;

    public static ComponentUI createUI(JComponent x) {

        return new MotifPopupMenuUI();

    }

    /* This has to deal with the fact that the title may be wider than

       the widest child component.

       */

    public Dimension getPreferredSize(JComponent c) {

        LayoutManager layout = c.getLayout();

        Dimension d = layout.preferredLayoutSize(c);

        String title = ((JPopupMenu)c).getLabel();

        if (titleFont == null) {

            UIDefaults table = UIManager.getLookAndFeelDefaults();

            titleFont = table.getFont("PopupMenu.font");

        }

        FontMetrics fm = c.getFontMetrics(titleFont);

        int         stringWidth = 0;

        if (title!=null) {

            stringWidth += SwingUtilities2.stringWidth(c, fm, title);

        }

        if (d.width < stringWidth) {

            d.width = stringWidth + 8;

            Insets i = c.getInsets();

            if (i!=null) {

                d.width += i.left + i.right;

            }

            if (border != null) {

                i = border.getBorderInsets(c);

                d.width += i.left + i.right;

            }

            return d;

        }

        return null;

    }

    protected ChangeListener createChangeListener(JPopupMenu m) {

        return new ChangeListener() {

            public void stateChanged(ChangeEvent e) {}

        };

    }

    public boolean isPopupTrigger(MouseEvent e) {

        return ((e.getID()==MouseEvent.MOUSE_PRESSED)

                && ((e.getModifiers() & MouseEvent.BUTTON3_MASK)!=0));

    }

}