/*

 * Copyright 1997-2008 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

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

import java.awt.*;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.plaf.*;

import javax.swing.plaf.basic.*;

import javax.swing.table.*;

import static com.sun.java.swing.plaf.windows.TMSchema.*;

import static com.sun.java.swing.plaf.windows.XPStyle.*;

import sun.swing.table.*;

public class WindowsTableHeaderUI extends BasicTableHeaderUI {

    private TableCellRenderer originalHeaderRenderer;

    public static ComponentUI createUI(JComponent h) {

        return new WindowsTableHeaderUI();

    }

    public void installUI(JComponent c) {

        super.installUI(c);

        if (XPStyle.getXP() != null) {

            originalHeaderRenderer = header.getDefaultRenderer();

            if (originalHeaderRenderer instanceof UIResource) {

                header.setDefaultRenderer(new XPDefaultRenderer());

            }

        }

    }

    public void uninstallUI(JComponent c) {

        if (header.getDefaultRenderer() instanceof XPDefaultRenderer) {

            header.setDefaultRenderer(originalHeaderRenderer);

        }

        super.uninstallUI(c);

    }

    @Override

    protected void rolloverColumnUpdated(int oldColumn, int newColumn) {

        if (XPStyle.getXP() != null) {

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

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

        }

    }

    private class XPDefaultRenderer extends DefaultTableCellHeaderRenderer {

        Skin skin;

        boolean isSelected, hasFocus, hasRollover;

        int column;

        XPDefaultRenderer() {

            setHorizontalAlignment(LEADING);

        }

        public Component getTableCellRendererComponent(JTable table, Object value,

                                                       boolean isSelected, boolean hasFocus,

                                                       int row, int column) {

            super.getTableCellRendererComponent(table, value, isSelected,

                                                hasFocus, row, column);

            this.isSelected = isSelected;

            this.hasFocus = hasFocus;

            this.column = column;

            this.hasRollover = (column == getRolloverColumn());

            if (skin == null) {

                skin = XPStyle.getXP().getSkin(header, Part.HP_HEADERITEM);

            }

            Insets margins = skin.getContentMargin();

            Border border = null;

            int contentTop = 0;

            int contentLeft = 0;

            int contentBottom = 0;

            int contentRight = 0;

            if (margins != null) {

                contentTop = margins.top;

                contentLeft = margins.left;

                contentBottom = margins.bottom;

                contentRight = margins.right;

            }

            /* idk:

             * Both on Vista and XP there is some offset to the

             * HP_HEADERITEM content. It does not seem to come from

             * Prop.CONTENTMARGINS. Do not know where it is defined.

             * using some hardcoded values.

             */

            contentLeft += 5;

            contentBottom += 4;

            contentRight += 5;

            /* On Vista sortIcon is painted above the header's text.

             * We use border to paint it.

             */

            Icon sortIcon;

            if (WindowsLookAndFeel.isOnVista()

                && ((sortIcon = getIcon()) instanceof javax.swing.plaf.UIResource

                    || sortIcon == null)) {

                contentTop += 1;

                setIcon(null);

                sortIcon = null;

                SortOrder sortOrder =

                    getColumnSortOrder(table, column);

                if (sortOrder != null) {

                    switch (sortOrder) {

                    case ASCENDING:

                        sortIcon =

                            UIManager.getIcon("Table.ascendingSortIcon");

                        break;

                    case DESCENDING:

                        sortIcon =

                            UIManager.getIcon("Table.descendingSortIcon");

                        break;

                    }

                }

                if (sortIcon != null) {

                    contentBottom = sortIcon.getIconHeight();

                    border = new IconBorder(sortIcon, contentTop, contentLeft,

                                            contentBottom, contentRight);

                } else {

                    sortIcon =

                        UIManager.getIcon("Table.ascendingSortIcon");

                    int sortIconHeight =

                        (sortIcon != null) ? sortIcon.getIconHeight() : 0;

                    if (sortIconHeight != 0) {

                        contentBottom = sortIconHeight;

                    }

                    border =

                        new EmptyBorder(

                            sortIconHeight + contentTop, contentLeft,

                            contentBottom, contentRight);

                }

            } else {

                contentTop += 3;

                border = new EmptyBorder(contentTop, contentLeft,

                                         contentBottom, contentRight);

            }

            setBorder(border);

            return this;

        }

        public void paint(Graphics g) {

            Dimension size = getSize();

            State state = State.NORMAL;

                state = State.PRESSED;

            } else if (isSelected || hasFocus || hasRollover) {

                state = State.HOT;

            }

            /* on Vista there are more states for sorted columns */

            if (WindowsLookAndFeel.isOnVista()) {

                SortOrder sortOrder = getColumnSortOrder(header.getTable(), column);

                if (sortOrder != null) {

                     switch(sortOrder) {

                     case ASCENDING:

                         /* falls through */

                     case DESCENDING:

                         switch (state) {

                         case NORMAL:

                             state = State.SORTEDNORMAL;

                             break;

                         case PRESSED:

                             state = State.SORTEDPRESSED;

                             break;

                         case HOT:

                             state = State.SORTEDHOT;

                             break;

                         default:

                             /* do nothing */

                         }

                     default :

                         /* do nothing */

                     }

                }

            }

            skin.paintSkin(g, 0, 0, size.width-1, size.height-1, state);

            super.paint(g);

        }

    }

    /**

     * A border with an Icon at the middle of the top side.

     * Outer insets can be provided for this border.

     */

    private static class IconBorder implements Border, UIResource{

        private final Icon icon;

        private final int top;

        private final int left;

        private final int bottom;

        private final int right;

        /**

         * Creates this border;

         * @param icon - icon to paint for this border

         * @param top, left, bottom, right - outer insets for this border

         */

        public IconBorder(Icon icon, int top, int left,

                          int bottom, int right) {

            this.icon = icon;

            this.top = top;

            this.left = left;

            this.bottom = bottom;

            this.right = right;

        }

        public Insets getBorderInsets(Component c) {

            return new Insets(icon.getIconHeight() + top, left, bottom, right);

        }

        public boolean isBorderOpaque() {

            return false;

        }

        public void paintBorder(Component c, Graphics g, int x, int y,

                                int width, int height) {

            icon.paintIcon(c, g,

                x + left + (width - left - right - icon.getIconWidth()) / 2,

                y + top);

        }

    }

}