/*

 * Copyright (c) 2002, 2014, 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 javax.swing.plaf.synth;

import java.beans.*;

import javax.swing.*;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Insets;

import javax.swing.plaf.ComponentUI;

import javax.swing.plaf.SeparatorUI;

import javax.swing.plaf.UIResource;

import javax.swing.plaf.DimensionUIResource;

/**

 * Provides the Synth L&F UI delegate for

 * {@link javax.swing.JSeparator}.

 *

 * @author Shannon Hickey

 * @author Joshua Outwater

 * @since 1.7

 */

public class SynthSeparatorUI extends SeparatorUI

                              implements PropertyChangeListener, SynthUI {

    private SynthStyle style;

    /**

     * Creates a new UI object for the given component.

     *

     * @param c component to create UI object for

     * @return the UI object

     */

    public static ComponentUI createUI(JComponent c) {

        return new SynthSeparatorUI();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void installUI(JComponent c) {

        installDefaults((JSeparator)c);

        installListeners((JSeparator)c);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void uninstallUI(JComponent c) {

        uninstallListeners((JSeparator)c);

        uninstallDefaults((JSeparator)c);

    }

    /**

     * Installs default setting. This method is called when a

     * {@code LookAndFeel} is installed.

     *

     * @param c specifies the {@code JSeparator} for the installed

     * {@code LookAndFeel}.

     */

    public void installDefaults(JSeparator c) {

        updateStyle(c);

    }

    private void updateStyle(JSeparator sep) {

        SynthContext context = getContext(sep, ENABLED);

        SynthStyle oldStyle = style;

        style = SynthLookAndFeel.updateStyle(context, this);

        if (style != oldStyle) {

            if (sep instanceof JToolBar.Separator) {

                Dimension size = ((JToolBar.Separator)sep).getSeparatorSize();

                if (size == null || size instanceof UIResource) {

                    size = (DimensionUIResource)style.get(

                                      context, "ToolBar.separatorSize");

                    if (size == null) {

                        size = new DimensionUIResource(10, 10);

                    }

                    ((JToolBar.Separator)sep).setSeparatorSize(size);

                }

            }

        }

    }

    /**

     * Uninstalls default setting. This method is called when a

     * {@code LookAndFeel} is uninstalled.

     *

     * @param c specifies the {@code JSeparator} for the (un)installed

     * {@code LookAndFeel}.

     */

    public void uninstallDefaults(JSeparator c) {

        SynthContext context = getContext(c, ENABLED);

        style.uninstallDefaults(context);

        style = null;

    }

    /**

     * Installs listeners. This method is called when a

     * {@code LookAndFeel} is installed.

     *

     * @param c specifies the {@code JSeparator} for the installed

     * {@code LookAndFeel}.

     */

    public void installListeners(JSeparator c) {

        c.addPropertyChangeListener(this);

    }

    /**

     * Uninstalls listeners. This method is called when a

     * {@code LookAndFeel} is uninstalled.

     *

     * @param c specifies the {@code JSeparator} for the (un)installed

     * {@code LookAndFeel}.

     */

    public void uninstallListeners(JSeparator c) {

        c.removePropertyChangeListener(this);

    }

    /**

     * Notifies this UI delegate to repaint the specified component.

     * This method paints the component background, then calls

     * the {@link #paint(SynthContext,Graphics)} method.

     *

     * <p>In general, this method does not need to be overridden by subclasses.

     * All Look and Feel rendering code should reside in the {@code paint} method.

     *

     * @param g the {@code Graphics} object used for painting

     * @param c the component being painted

     * @see #paint(SynthContext,Graphics)

     */

    @Override

    public void update(Graphics g, JComponent c) {

        SynthContext context = getContext(c);

        JSeparator separator = (JSeparator)context.getComponent();

        SynthLookAndFeel.update(context, g);

        context.getPainter().paintSeparatorBackground(context,

                          g, 0, 0, c.getWidth(), c.getHeight(),

                          separator.getOrientation());

        paint(context, g);

    }

    /**

     * Paints the specified component according to the Look and Feel.

     * <p>This method is not used by Synth Look and Feel.

     * Painting is handled by the {@link #paint(SynthContext,Graphics)} method.

     *

     * @param g the {@code Graphics} object used for painting

     * @param c the component being painted

     * @see #paint(SynthContext,Graphics)

     */

    @Override

    public void paint(Graphics g, JComponent c) {

        SynthContext context = getContext(c);

        paint(context, g);

    }

    /**

     * Paints the specified component.

     *

     * @param context context for the component being painted

     * @param g the {@code Graphics} object used for painting

     * @see #update(Graphics,JComponent)

     */

    protected void paint(SynthContext context, Graphics g) {

        JSeparator separator = (JSeparator)context.getComponent();

        context.getPainter().paintSeparatorForeground(context, g, 0, 0,

                             separator.getWidth(), separator.getHeight(),

                             separator.getOrientation());

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void paintBorder(SynthContext context, Graphics g, int x,

                            int y, int w, int h) {

        JSeparator separator = (JSeparator)context.getComponent();

        context.getPainter().paintSeparatorBorder(context, g, x, y, w, h,

                                                  separator.getOrientation());

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Dimension getPreferredSize(JComponent c) {

        SynthContext context = getContext(c);

        int thickness = style.getInt(context, "Separator.thickness", 2);

        Insets insets = c.getInsets();

        Dimension size;

        if (((JSeparator)c).getOrientation() == JSeparator.VERTICAL) {

            size = new Dimension(insets.left + insets.right + thickness,

                                 insets.top + insets.bottom);

        } else {

            size = new Dimension(insets.left + insets.right,

                                 insets.top + insets.bottom + thickness);

        }

        return size;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Dimension getMinimumSize(JComponent c) {

        return getPreferredSize(c);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Dimension getMaximumSize(JComponent c) {

        return new Dimension(Short.MAX_VALUE, Short.MAX_VALUE);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public SynthContext getContext(JComponent c) {

        return getContext(c, SynthLookAndFeel.getComponentState(c));

    }

    private SynthContext getContext(JComponent c, int state) {

        return SynthContext.getContext(c, style, state);

    }

    public void propertyChange(PropertyChangeEvent evt) {

        if (SynthLookAndFeel.shouldUpdateStyle(evt)) {

            updateStyle((JSeparator)evt.getSource());

        }

    }

}