gcc/libjava/classpath/javax/swing/plaf/basic/BasicIconFactory.java

/* BasicIconFactory.java --
   Copyright (C) 2002, 2004, 2005  Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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02110-1301 USA.

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permission to link this library with independent modules to produce an
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package javax.swing.plaf.basic;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.io.Serializable;

import javax.swing.Icon;
import javax.swing.JCheckBoxMenuItem;

/**
 * Creates icons for the {@link BasicLookAndFeel}.
 */
public class BasicIconFactory implements Serializable
{
  static final long serialVersionUID = 5605588811185324383L;

  private static class DummyIcon
    implements Icon
  {
    public int getIconHeight()
    {
      return 10;
    }
    public int getIconWidth()
    {
      return 10;
    }
    public void paintIcon(Component c, Graphics g, int x, int y)
    {
      Color save = g.getColor();
      g.setColor(c.getForeground());
      g.drawRect(x, y, 10, 10);
      g.setColor(save);
    }
  }

  /**
   * The icon used for CheckBoxes in the BasicLookAndFeel. This is an empty
   * icon with a size of 13x13 pixels.
   */
  static class CheckBoxIcon
    implements Icon
  {
    /**
     * Returns the height of the icon. The BasicLookAndFeel CheckBox icon
     * has a height of 13 pixels.
     *
     * @return the height of the icon
     */
    public int getIconHeight()
    {
      return 13;
    }

    /**
     * Returns the width of the icon. The BasicLookAndFeel CheckBox icon
     * has a width of 13 pixels.
     *
     * @return the height of the icon
     */
    public int getIconWidth()
    {
      return 13;
    }

    /**
     * Paints the icon. The BasicLookAndFeel CheckBox icon is empty and does
     * not need to be painted.
     *
     * @param c the component to be painted
     * @param g the Graphics context to be painted with
     * @param x the x position of the icon
     * @param y the y position of the icon
     */
    public void paintIcon(Component c, Graphics g, int x, int y)
    {
      // The icon is empty and needs no painting.
    }
  }

  /**
   * The icon used for {@link JCheckBoxMenuItem}s in the
   * {@link BasicLookAndFeel}. This icon has a size of 9x9 pixels.
   */
  static class CheckBoxMenuItemIcon
    implements Icon
  {
    /**
     * Returns the height of the icon in pixels.
     *
     * @return the height of the icon
     */
    public int getIconHeight()
    {
      return 9;
    }

    /**
     * Returns the width of the icon in pixels.
     *
     * @return the height of the icon
     */
    public int getIconWidth()
    {
      return 9;
    }

    /**
     * Paints the icon.
     *
     * @param c the component to be painted
     * @param g the Graphics context to be painted with
     * @param x the x position of the icon
     * @param y the y position of the icon
     */
    public void paintIcon(Component c, Graphics g, int x, int y)
    {
      JCheckBoxMenuItem item = (JCheckBoxMenuItem) c;
      if (item.isSelected())
        {
          // paint the check...
          g.setColor(Color.black);
          g.drawLine(x + 1, y + 3, x + 1, y + 4);
          g.drawLine(x + 2, y + 4, x + 2, y + 5);
          for (int i = 0; i < 5; i++)
            g.drawLine(x + 3 + i, y + 5 - i, x + 3 + i, y + 6 - i);
        }
    }
  }

  /**
   * The icon used for RadioButtons in the BasicLookAndFeel. This is an empty
   * icon with a size of 13x13 pixels.
   */
  static class RadioButtonIcon
    implements Icon
  {
    /**
     * Returns the height of the icon. The BasicLookAndFeel RadioButton icon
     * has a height of 13 pixels.
     *
     * @return the height of the icon
     */
    public int getIconHeight()
    {
      return 13;
    }

    /**
     * Returns the width of the icon. The BasicLookAndFeel RadioButton icon
     * has a width of 13 pixels.
     *
     * @return the height of the icon
     */
    public int getIconWidth()
    {
      return 13;
    }

    /**
     * Paints the icon. The BasicLookAndFeel RadioButton icon is empty and does
     * not need to be painted.
     *
     * @param c the component to be painted
     * @param g the Graphics context to be painted with
     * @param x the x position of the icon
     * @param y the y position of the icon
     */
    public void paintIcon(Component c, Graphics g, int x, int y)
    {
      // The icon is empty and needs no painting.
    }
  }
  /** The cached CheckBoxIcon instance. */
  private static CheckBoxIcon checkBoxIcon;

  /** The cached RadioButtonIcon instance. */
  private static RadioButtonIcon radioButtonIcon;

  public static Icon getMenuItemCheckIcon()
  {
    return new Icon()
    {
      public int getIconHeight()
      {
        return 13;
      }

      public int getIconWidth()
      {
        return 13;
      }

      public void paintIcon(Component c, Graphics g, int x, int y)
      {
        Color saved = g.getColor();
        g.setColor(Color.BLACK);
        g.drawLine(3 + x, 5 + y, 3 + x, 9 + y);
        g.drawLine(4 + x, 5 + y, 4 + x, 9 + y);
        g.drawLine(5 + x, 7 + y, 9 + x, 3 + y);
        g.drawLine(5 + x, 8 + y, 9 + x, 4 + y);
        g.setColor(saved);
      }
    };
  }
  public static Icon getMenuItemArrowIcon()
  {
    return new DummyIcon();
  }

  /**
   * Returns a new instance of a 4 x 8 icon showing a small black triangle that
   * points to the right.  This is displayed in menu items that have a
   * sub menu.
   *
   * @return The icon.
   */
  public static Icon getMenuArrowIcon()
  {
    return new Icon()
      {
        public int getIconHeight()
        {
          return 8;
        }
        public int getIconWidth()
        {
          return 4;
        }
        public void paintIcon(Component c, Graphics g, int x, int y)
        {
          Color saved = g.getColor();
          g.setColor(Color.BLACK);
          for (int i = 0; i < 4; i++)
            g.drawLine(x + i, y + i, x + i, y + 7 - i);
          g.setColor(saved);
        }
      };
  }

  /**
   * Returns an icon for CheckBoxes in the BasicLookAndFeel. CheckBox icons
   * in the Basic L&amp;F are empty and have a size of 13x13 pixels.
   * This method returns a shared single instance of this icon.
   *
   * @return an icon for CheckBoxes in the BasicLookAndFeel
   */
  public static Icon getCheckBoxIcon()
  {
    if (checkBoxIcon == null)
      checkBoxIcon = new CheckBoxIcon();
    return checkBoxIcon;
  }

  /**
   * Returns an icon for RadioButtons in the BasicLookAndFeel. RadioButton
   * icons in the Basic L&amp;F are empty and have a size of 13x13 pixels.
   * This method returns a shared single instance of this icon.
   *
   * @return an icon for RadioButtons in the BasicLookAndFeel
   */
  public static Icon getRadioButtonIcon()
  {
    if (radioButtonIcon == null)
      radioButtonIcon = new RadioButtonIcon();
    return radioButtonIcon;
  }

  /**
   * Creates and returns an icon used when rendering {@link JCheckBoxMenuItem}
   * components.
   *
   * @return An icon.
   */
  public static Icon getCheckBoxMenuItemIcon()
  {
    return new CheckBoxMenuItemIcon();
  }

  public static Icon getRadioButtonMenuItemIcon()
  {
    return getRadioButtonIcon();
  }

  public static Icon createEmptyFrameIcon()
  {
    return new DummyIcon();
  }
} // class BasicIconFactory