/*

 * 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

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

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 */

package javax.swing.plaf.synth;

import java.awt.*;

import java.beans.*;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.plaf.*;

import javax.swing.plaf.basic.*;

import javax.swing.table.*;

import sun.swing.table.*;

/**

 * Provides the Synth L&F UI delegate for

 * {@link javax.swing.table.JTableHeader}.

 *

 * @author Alan Chung

 * @author Philip Milne

 * @since 1.7

 */

public class SynthTableHeaderUI extends BasicTableHeaderUI

                                implements PropertyChangeListener, SynthUI {

//

// Instance Variables

//

    private TableCellRenderer prevRenderer = null;

    private SynthStyle style;

    /**

     * Creates a new UI object for the given component.

     *

     * @param h component to create UI object for

     * @return the UI object

     */

    public static ComponentUI createUI(JComponent h) {

        return new SynthTableHeaderUI();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void installDefaults() {

        prevRenderer = header.getDefaultRenderer();

        if (prevRenderer instanceof UIResource) {

            header.setDefaultRenderer(new HeaderRenderer());

        }

        updateStyle(header);

    }

    private void updateStyle(JTableHeader c) {

        SynthContext context = getContext(c, ENABLED);

        SynthStyle oldStyle = style;

        style = SynthLookAndFeel.updateStyle(context, this);

        if (style != oldStyle) {

            if (oldStyle != null) {

                uninstallKeyboardActions();

                installKeyboardActions();

            }

        }

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void installListeners() {

        super.installListeners();

        header.addPropertyChangeListener(this);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void uninstallDefaults() {

        if (header.getDefaultRenderer() instanceof HeaderRenderer) {

            header.setDefaultRenderer(prevRenderer);

        }

        SynthContext context = getContext(header, ENABLED);

        style.uninstallDefaults(context);

        style = null;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void uninstallListeners() {

        header.removePropertyChangeListener(this);

        super.uninstallListeners();

    }

    /**

     * 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);

        SynthLookAndFeel.update(context, g);

        context.getPainter().paintTableHeaderBackground(context,

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

        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) {

        super.paint(g, context.getComponent());

    }

    /**

     * {@inheritDoc}

     */

    @Override

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

                            int y, int w, int h) {

        context.getPainter().paintTableHeaderBorder(context, g, x, y, w, h);

    }

//

// SynthUI

//

    /**

     * {@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);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void rolloverColumnUpdated(int oldColumn, int newColumn) {

        header.repaint(header.getHeaderRect(oldColumn));

        header.repaint(header.getHeaderRect(newColumn));

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void propertyChange(PropertyChangeEvent evt) {

        if (SynthLookAndFeel.shouldUpdateStyle(evt)) {

            updateStyle((JTableHeader)evt.getSource());

        }

    }

    @SuppressWarnings("serial") // Superclass is not serializable across versions

    private class HeaderRenderer extends DefaultTableCellHeaderRenderer {

        HeaderRenderer() {

            setHorizontalAlignment(JLabel.LEADING);

            setName("TableHeader.renderer");

        }

        @Override

        public Component getTableCellRendererComponent(JTable table, Object value,

                                                       boolean isSelected,

                                                       boolean hasFocus,

                                                       int row, int column) {

            boolean hasRollover = (column == getRolloverColumn());

            if (isSelected || hasRollover || hasFocus) {

                boolean enabled = (table == null)? true : table.isEnabled();

                SynthLookAndFeel.setSelectedUI((SynthLabelUI)SynthLookAndFeel.

                             getUIOfType(getUI(), SynthLabelUI.class),

                             isSelected, hasFocus, enabled,

                             hasRollover);

            } else {

                SynthLookAndFeel.resetSelectedUI();

            }

            //stuff a variable into the client property of this renderer indicating the sort order,

            //so that different rendering can be done for the header based on sorted state.

            RowSorter<?> rs = table == null ? null : table.getRowSorter();

            java.util.List<? extends RowSorter.SortKey> sortKeys = rs == null ? null : rs.getSortKeys();

            if (sortKeys != null && sortKeys.size() > 0 && sortKeys.get(0).getColumn() ==

                    table.convertColumnIndexToModel(column)) {

                switch(sortKeys.get(0).getSortOrder()) {

                    case ASCENDING:

                        putClientProperty("Table.sortOrder", "ASCENDING");

                        break;

                    case DESCENDING:

                        putClientProperty("Table.sortOrder", "DESCENDING");

                        break;

                    case UNSORTED:

                        putClientProperty("Table.sortOrder", "UNSORTED");

                        break;

                    default:

                        throw new AssertionError("Cannot happen");

                }

            } else {

                putClientProperty("Table.sortOrder", "UNSORTED");

            }

            super.getTableCellRendererComponent(table, value, isSelected,

                                                hasFocus, row, column);

            return this;

        }

        @Override

        public void setBorder(Border border) {

            if (border instanceof SynthBorder) {

                super.setBorder(border);

            }

        }

    }

}