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/*
* Copyright (c) 2002 and later by MH Software-Entwicklung. All Rights Reserved.
*  
* JTattoo is multiple licensed. If your are an open source developer you can use
* it under the terms and conditions of the GNU General Public License version 2.0
* or later as published by the Free Software Foundation.
*  
* see: gpl-2.0.txt
* 
* If you pay for a license you will become a registered user who could use the
* software under the terms and conditions of the GNU Lesser General Public License
* version 2.0 or later with classpath exception as published by the Free Software
* Foundation.
* 
* see: lgpl-2.0.txt
* see: classpath-exception.txt
* 
* Registered users could also use JTattoo under the terms and conditions of the 
* Apache License, Version 2.0 as published by the Apache Software Foundation.
*  
* see: APACHE-LICENSE-2.0.txt
*/

package com.jtattoo.plaf;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.RenderingHints;

import javax.swing.ButtonModel;
import javax.swing.JComponent;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.UIResource;
import javax.swing.plaf.basic.BasicMenuItemUI;

/**
 * @author Michael Hagen
 */
public class BaseMenuItemUI extends BasicMenuItemUI {

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

  public void installUI(JComponent c) {
    super.installUI(c);
    c.setOpaque(false);
  }

  public void uninstallUI(JComponent c) {
    c.setOpaque(true);
    super.uninstallUI(c);
  }

  public void update(Graphics g, JComponent c) {
    paintBackground(g, c, 0, 0, c.getWidth(), c.getHeight());
    paint(g, c);
  }

  protected void paintBackground(Graphics g, JMenuItem menuItem, Color bgColor) {
    if (menuItem.isOpaque()) {
      int w = menuItem.getWidth();
      int h = menuItem.getHeight();
      paintBackground(g, menuItem, 0, 0, w, h);
    }
  }

  protected void paintBackground(Graphics g, JComponent c, int x, int y, int w, int h) {
    JMenuItem mi = (JMenuItem) c;
    Color backColor = mi.getBackground();
    if (backColor == null || backColor instanceof UIResource) {
      backColor = AbstractLookAndFeel.getMenuBackgroundColor();
    }

    ButtonModel model = mi.getModel();
    if (model.isArmed() || model.isRollover() || (c instanceof JMenu && model.isSelected())) {
      g.setColor(AbstractLookAndFeel.getMenuSelectionBackgroundColor());
      g.fillRect(x, y, w, h);
      g.setColor(AbstractLookAndFeel.getMenuSelectionForegroundColor());
    }
    else if (!AbstractLookAndFeel.getTheme().isMenuOpaque()) {
      Graphics2D g2D = (Graphics2D) g;
      Composite savedComposite = g2D.getComposite();
      AlphaComposite alpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, AbstractLookAndFeel.getTheme().getMenuAlpha());
      g2D.setComposite(alpha);
      g2D.setColor(backColor);
      g2D.fillRect(x, y, w, h);
      g2D.setComposite(savedComposite);
      g.setColor(AbstractLookAndFeel.getMenuForegroundColor());
    }
    else {
      g.setColor(backColor);
      g.fillRect(x, y, w, h);
      g.setColor(AbstractLookAndFeel.getMenuForegroundColor());
    }
  }

  protected void paintText(Graphics g, JMenuItem menuItem, Rectangle textRect, String text) {
    ButtonModel model = menuItem.getModel();
    Color foreColor = menuItem.getForeground();
    if (model.isArmed() || model.isRollover()) {
      foreColor = AbstractLookAndFeel.getMenuSelectionForegroundColor();
    }
    else if (foreColor == null || foreColor instanceof UIResource) {
      foreColor = AbstractLookAndFeel.getMenuForegroundColor();
    }
    Graphics2D g2D = (Graphics2D) g;
    Object savedRenderingHint = null;
    if (AbstractLookAndFeel.getTheme().isTextAntiAliasingOn()) {
      savedRenderingHint = g2D.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
      g2D.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, AbstractLookAndFeel.getTheme().getTextAntiAliasingHint());
    }
    g2D.setColor(foreColor);
    super.paintText(g, menuItem, textRect, text);
    if (AbstractLookAndFeel.getTheme().isTextAntiAliasingOn()) {
      g2D.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, savedRenderingHint);
    }
  }
}