/*

 * Copyright (c) 1998, 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

 * questions.

 */

package javax.swing.plaf.basic;

import java.awt.*;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.plaf.*;

import java.awt.*;

import java.awt.event.*;

/**

 * BasicPanel implementation

 *

 * @author Steve Wilson

 */

public class BasicPanelUI extends PanelUI {

    // Shared UI object

    private static PanelUI panelUI;

    public static ComponentUI createUI(JComponent c) {

        if(panelUI == null) {

            panelUI = new BasicPanelUI();

        }

        return panelUI;

    }

    public void installUI(JComponent c) {

        JPanel p = (JPanel)c;

        super.installUI(p);

        installDefaults(p);

    }

    public void uninstallUI(JComponent c) {

        JPanel p = (JPanel)c;

        uninstallDefaults(p);

        super.uninstallUI(c);

    }

    protected void installDefaults(JPanel p) {

        LookAndFeel.installColorsAndFont(p,

                                         "Panel.background",

                                         "Panel.foreground",

                                         "Panel.font");

        LookAndFeel.installBorder(p,"Panel.border");

        LookAndFeel.installProperty(p, "opaque", Boolean.TRUE);

    }

    protected void uninstallDefaults(JPanel p) {

        LookAndFeel.uninstallBorder(p);

    }

    /**

     * Returns the baseline.

     *

     * @throws NullPointerException {@inheritDoc}

     * @throws IllegalArgumentException {@inheritDoc}

     * @see javax.swing.JComponent#getBaseline(int, int)

     * @since 1.6

     */

    public int getBaseline(JComponent c, int width, int height) {

        super.getBaseline(c, width, height);

        Border border = c.getBorder();

        if (border instanceof AbstractBorder) {

            return ((AbstractBorder)border).getBaseline(c, width, height);

        }

        return -1;

    }

    /**

     * Returns an enum indicating how the baseline of the component

     * changes as the size changes.

     *

     * @throws NullPointerException {@inheritDoc}

     * @see javax.swing.JComponent#getBaseline(int, int)

     * @since 1.6

     */

    public Component.BaselineResizeBehavior getBaselineResizeBehavior(

            JComponent c) {

        super.getBaselineResizeBehavior(c);

        Border border = c.getBorder();

        if (border instanceof AbstractBorder) {

            return ((AbstractBorder)border).getBaselineResizeBehavior(c);

        }

        return Component.BaselineResizeBehavior.OTHER;

    }

}