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/*
 * $Id: WindowsTaskPaneUI.java 3448 2009-08-19 08:12:23Z kleopatra $
 *
 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.jdesktop.swingx.plaf.windows;

import org.jdesktop.swingx.JXTaskPane;
import org.jdesktop.swingx.plaf.basic.BasicTaskPaneUI;

import javax.swing.JComponent;
import javax.swing.border.Border;
import javax.swing.plaf.ComponentUI;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.RenderingHints;

/**
 * Windows implementation of the TaskPaneUI.
 *
 * @author Frederic Lavigne
 */
public class WindowsTaskPaneUI extends BasicTaskPaneUI {

    public static ComponentUI createUI(JComponent c) {
        return new WindowsTaskPaneUI();
    }

    @Override
    protected Border createPaneBorder() {
        return new XPPaneBorder();
    }

    /**
     * Overriden to paint the background of the component but keeping the rounded
     * corners.
     */
    @Override
    public void update(Graphics g, JComponent c) {
        if (c.isOpaque()) {
            g.setColor(c.getParent().getBackground());
            g.fillRect(0, 0, c.getWidth(), c.getHeight());
            g.setColor(c.getBackground());
            g.fillRect(0, getRoundHeight(), c.getWidth(), c.getHeight() - getRoundHeight());
        }
        paint(g, c);
    }

    /**
     * The border of the taskpane group paints the "text", the "icon", the
     * "expanded" status and the "special" type.
     */
    private class XPPaneBorder extends PaneBorder {

        @Override
        protected void paintTitleBackground(JXTaskPane group, Graphics g) {
            if (group.isSpecial()) {
                g.setColor(specialTitleBackground);
                g.fillRoundRect(0, 0, group.getWidth(), getRoundHeight() * 2, getRoundHeight(), getRoundHeight());
                g.fillRect(0, getRoundHeight(), group.getWidth(), getTitleHeight(group) - getRoundHeight());
            } else {
                Paint oldPaint = ((Graphics2D) g).getPaint();
                GradientPaint gradient = new GradientPaint(
                    0f, group.getWidth() / 2,
                    group.getComponentOrientation().isLeftToRight() ? titleBackgroundGradientStart : titleBackgroundGradientEnd,
                    group.getWidth(), getTitleHeight(group),
                    group.getComponentOrientation().isLeftToRight() ? titleBackgroundGradientEnd : titleBackgroundGradientStart
                );

                ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
                ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
                ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
                ((Graphics2D) g).setPaint(gradient);
                g.fillRoundRect(0, 0, group.getWidth(), getRoundHeight() * 2, getRoundHeight(), getRoundHeight());
                g.fillRect(0, getRoundHeight(), group.getWidth(), getTitleHeight(group) - getRoundHeight());
                ((Graphics2D) g).setPaint(oldPaint);
            }
        }

        @Override
        protected void paintExpandedControls(JXTaskPane group, Graphics g, int x, int y, int width, int height) {
            ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

            paintOvalAroundControls(group, g, x, y, width, height);
            g.setColor(getPaintColor(group));
            paintChevronControls(group, g, x, y, width, height);

            ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
        }

        @Override
        protected boolean isMouseOverBorder() {
            return true;
        }
    }
}