Java/Swing Components/Color Chooser

A panel from where you can choose a color based on it"s HTML name

   
//Revised from com.greef.ui;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.lang.reflect.Field;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import javax.swing.Icon;
import javax.swing.JColorChooser;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.UIManager;
import javax.swing.colorchooser.AbstractColorChooserPanel;
/**
 * This is a panel from where you can choose a color based on it"s HTML name.
 * This panel was designed to be integrated in JColorChooser component.
 * <blockquote><code>
 * JColorChooser colorChooser = new JColorChooser();
 * colorChooser.addChooserPanel(new HTMLColorsChooserPanel());
 * </code></blockquote>
 * @author Adrian Ber
 * @see HTMLColors
 */
public class HTMLColorsChooserPanel extends AbstractColorChooserPanel {
    /** The name of this color chooser panel; will appear as the tab name
     *  in the color chooser
     */
    private String displayName;
    /** The name displayed for a color without a HTML name */
    private String nonHTMLColorDisplayName;
    /** the color chooser in which is included this panel. */
    private JColorChooser parent = null;
    /** The combo box filled with the HTML color names */
    private JComboBox colorsComboBox = new JComboBox();
    /** The label in front of the HTML color combo box. */
    private JLabel colorLabel;
    public HTMLColorsChooserPanel() {
        this("HTML Names", "<Custom>");
    }
    public HTMLColorsChooserPanel(String displayName) {
        this(displayName, "<Custom>");
    }
    public HTMLColorsChooserPanel(String displayName, String nonHTMlColorDisplayName) {
        this.displayName = displayName;
        this.nonHTMLColorDisplayName = nonHTMlColorDisplayName;
        buildChooser();
    }
    public Icon getSmallDisplayIcon() {
        return null;
    }
    public void updateChooser() {
        if (parent != null) {
            String x = HTMLColors.getName(getColorFromModel());
            if (x == null) x = nonHTMLColorDisplayName;
            colorsComboBox.setSelectedItem(x);
        }
    }
    public String getDisplayName() {
        return displayName;
    }
    public Icon getLargeDisplayIcon() {
        return null;
    }
    /** Initializes this color chooser components. */
    protected void buildChooser() {
        setLayout(new BorderLayout());
        colorsComboBox.addItem(nonHTMLColorDisplayName);
        for (String color : HTMLColors.colors()) {
            colorsComboBox.addItem(color);
        }
        colorsComboBox.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent ev) {
                if (parent == null) return;
                Object name = colorsComboBox.getSelectedItem();
                if ((name != null) && (!name.toString().equals(nonHTMLColorDisplayName))) {
                    parent.setColor(HTMLColors.getColor(name.toString()));
                }
            }
        });
        colorLabel = new JLabel(getColorLabelText());
        add(colorLabel, BorderLayout.WEST);
        add(colorsComboBox, BorderLayout.CENTER);
    }
    private String getColorLabelText() {
        String x = UIManager.getString("HTMLColorsChooserPanel.colorLabel");
        if (x == null) {
            x = "HTML Color:";
        }
        return x;
    }
    public void installChooserPanel(JColorChooser enclosingChooser) {
        parent = enclosingChooser;
        super.installChooserPanel(enclosingChooser);
    }
    public void updateUI() {
        super.updateUI();
        if (colorLabel != null)
            colorLabel.setText(getColorLabelText());
    }
}
class HTMLColors {
  /** Don"t instantiate this, use only the static methods */
  private HTMLColors() {
  }
  /** map between color names and colors;
   * tough there are fields for every color we use a map because is a faster
   * way to get the color
   */
  private static Map<String, Color> name2color = new HashMap<String, Color>();
  /** map between colors and color names;
   * tough there are fields for every color we use a map because is a faster
   * way to get the color
   */
  private static Map<Color, String> color2name = new HashMap<Color, String>();
  /** Initialiase colors map */
  private static void initColorsMap() {
      Field[] fields = HTMLColors.class.getFields();
      for (Field field : fields) {
          if (field.getType().isAssignableFrom(Color.class)) {
              addColor(field.getName());
          }
      }
  }
  /** Used to initialize the map */
  private static void addColor(String colorName, Color color) {
      name2color.put(colorName, color);
      color2name.put(color, colorName);
  }
  /** Used to initialize the map */
  private static void addColor(String colorName) {
      addColor(colorName, getColorFromField(colorName));
  }
  /** Used to initialize the map */
  private static void addColor(String colorName, int colorRGB) {
      addColor(colorName, new Color(colorRGB));
  }
  /** Returns a color with the specified case-insensitive name. */
  private static Color getColorFromField(String name) {
      try {
          Field colorField = HTMLColors.class.getField(name.toLowerCase());
          return (Color) colorField.get(HTMLColors.class);
      }
      catch (NoSuchFieldException exc) {
      }
      catch (SecurityException exc) {
      }
      catch (IllegalAccessException exc) {
      }
      catch (IllegalArgumentException exc) {
      }
      return null;
  }
  /** Returns a color with the specified case-insensitive name.*/
  public static String getName(Color color) {
      return color2name.get(color);
  }
  /** Returns a color with the specified case-insensitive name.*/
  public static Color getColor(String name) {
      return name2color.get(name.toLowerCase());
  }
  /** Returns a collection of all color names */
  public static Collection<String> colors() {
      return name2color.keySet();
  }
  /** Transform a color string into a color object.
   *  @param s the color string
   *  @return the color object
   */
  public static Color decodeColor(String s) {
      if (s == null)
          return null;
      Color c;
      try {
          c = Color.decode(s);
      }
      catch (NumberFormatException exc) {
          c = HTMLColors.getColor(s);
      }
      return c;
  }
  public static final Color aliceblue = new Color(0xf0f8ff);
  public static final Color antiquewhite = new Color(0xfaebd7);
  public static final Color aqua = new Color(0x00ffff);
  public static final Color aquamarine = new Color(0x7fffd4);
  public static final Color azure = new Color(0xf0ffff);
  public static final Color beige = new Color(0xf5f5dc);
  public static final Color bisque = new Color(0xffe4c4);
  public static final Color black = new Color(0x000000);
  public static final Color blanchedalmond = new Color(0xffebcd);
  public static final Color blue = new Color(0x0000ff);
  public static final Color blueviolet = new Color(0x8a2be2);
  public static final Color brown = new Color(0xa52a2a);
  public static final Color burlywood = new Color(0xdeb887);
  public static final Color cadetblue = new Color(0x5f9ea0);
  public static final Color chartreuse = new Color(0x7fff00);
  public static final Color chocolate = new Color(0xd2691e);
  public static final Color coral = new Color(0xff7f50);
  public static final Color cornflowerblue = new Color(0x6495ed);
  public static final Color cornsilk = new Color(0xfff8dc);
  public static final Color crimson = new Color(0xdc143c);
  public static final Color cyan = new Color(0x00ffff);
  public static final Color darkblue = new Color(0x00008b);
  public static final Color darkcyan = new Color(0x008b8b);
  public static final Color darkgoldenrod = new Color(0xb8860b);
  public static final Color darkgray = new Color(0xa9a9a9);
  public static final Color darkgreen = new Color(0x006400);
  public static final Color darkkhaki = new Color(0xbdb76b);
  public static final Color darkmagenta = new Color(0x8b008b);
  public static final Color darkolivegreen = new Color(0x556b2f);
  public static final Color darkorange = new Color(0xff8c00);
  public static final Color darkorchid = new Color(0x9932cc);
  public static final Color darkred = new Color(0x8b0000);
  public static final Color darksalmon = new Color(0xe9967a);
  public static final Color darkseagreen = new Color(0x8fbc8f);
  public static final Color darkslateblue = new Color(0x483d8b);
  public static final Color darkslategray = new Color(0x2f4f4f);
  public static final Color darkturquoise = new Color(0x00ced1);
  public static final Color darkviolet = new Color(0x9400d3);
  public static final Color deeppink = new Color(0xff1493);
  public static final Color deepskyblue = new Color(0x00bfff);
  public static final Color dimgray = new Color(0x696969);
  public static final Color dodgerblue = new Color(0x1e90ff);
  public static final Color firebrick = new Color(0xb22222);
  public static final Color floralwhite = new Color(0xfffaf0);
  public static final Color forestgreen = new Color(0x228b22);
  public static final Color fuchsia = new Color(0xff00ff);
  public static final Color gainsboro = new Color(0xdcdcdc);
  public static final Color ghostwhite = new Color(0xf8f8ff);
  public static final Color gold = new Color(0xffd700);
  public static final Color goldenrod = new Color(0xdaa520);
  public static final Color gray = new Color(0x808080);
  public static final Color green = new Color(0x008000);
  public static final Color greenyellow = new Color(0xadff2f);
  public static final Color honeydew = new Color(0xf0fff0);
  public static final Color hotpink = new Color(0xff69b4);
  public static final Color indianred = new Color(0xcd5c5c);
  public static final Color indigo = new Color(0x4b0082);
  public static final Color ivory = new Color(0xfffff0);
  public static final Color khaki = new Color(0xf0e68c);
  public static final Color lavender = new Color(0xe6e6fa);
  public static final Color lavenderblush = new Color(0xfff0f5);
  public static final Color lawngreen = new Color(0x7cfc00);
  public static final Color lemonchiffon = new Color(0xfffacd);
  public static final Color lightblue = new Color(0xadd8e6);
  public static final Color lightcoral = new Color(0xf08080);
  public static final Color lightcyan = new Color(0xe0ffff);
  public static final Color lightgoldenrodyellow = new Color(0xfafad2);
  public static final Color lightgreen = new Color(0x90ee90);
  public static final Color lightgrey = new Color(0xd3d3d3);
  public static final Color lightpink = new Color(0xffb6c1);
  public static final Color lightsalmon = new Color(0xffa07a);
  public static final Color lightseagreen = new Color(0x20b2aa);
  public static final Color lightskyblue = new Color(0x87cefa);
  public static final Color lightslategray = new Color(0x778899);
  public static final Color lightsteelblue = new Color(0xb0c4de);
  public static final Color lightyellow = new Color(0xffffe0);
  public static final Color lime = new Color(0x00ff00);
  public static final Color limegreen = new Color(0x32cd32);
  public static final Color linen = new Color(0xfaf0e6);
  public static final Color magenta = new Color(0xff00ff);
  public static final Color maroon = new Color(0x800000);
  public static final Color mediumaquamarine = new Color(0x66cdaa);
  public static final Color mediumblue = new Color(0x0000cd);
  public static final Color mediumorchid = new Color(0xba55d3);
  public static final Color mediumpurple = new Color(0x9370db);
  public static final Color mediumseagreen = new Color(0x3cb371);
  public static final Color mediumslateblue = new Color(0x7b68ee);
  public static final Color mediumspringgreen = new Color(0x00fa9a);
  public static final Color mediumturquoise = new Color(0x48d1cc);
  public static final Color mediumvioletred = new Color(0xc71585);
  public static final Color midnightblue = new Color(0x191970);
  public static final Color mintcream = new Color(0xf5fffa);
  public static final Color mistyrose = new Color(0xffe4e1);
  public static final Color moccasin = new Color(0xffe4b5);
  public static final Color navajowhite = new Color(0xffdead);
  public static final Color navy = new Color(0x000080);
  public static final Color oldlace = new Color(0xfdf5e6);
  public static final Color olive = new Color(0x808000);
  public static final Color olivedrab = new Color(0x6b8e23);
  public static final Color orange = new Color(0xffa500);
  public static final Color orangered = new Color(0xff4500);
  public static final Color orchid = new Color(0xda70d6);
  public static final Color palegoldenrod = new Color(0xeee8aa);
  public static final Color palegreen = new Color(0x98fb98);
  public static final Color paleturquoise = new Color(0xafeeee);
  public static final Color palevioletred = new Color(0xdb7093);
  public static final Color papayawhip = new Color(0xffefd5);
  public static final Color peachpuff = new Color(0xffdab9);
  public static final Color peru = new Color(0xcd853f);
  public static final Color pink = new Color(0xffc0cb);
  public static final Color plum = new Color(0xdda0dd);
  public static final Color powderblue = new Color(0xb0e0e6);
  public static final Color purple = new Color(0x800080);
  public static final Color red = new Color(0xff0000);
  public static final Color rosybrown = new Color(0xbc8f8f);
  public static final Color royalblue = new Color(0x4169e1);
  public static final Color saddlebrown = new Color(0x8b4513);
  public static final Color salmon = new Color(0xfa8072);
  public static final Color sandybrown = new Color(0xf4a460);
  public static final Color seagreen = new Color(0x2e8b57);
  public static final Color seashell = new Color(0xfff5ee);
  public static final Color sienna = new Color(0xa0522d);
  public static final Color silver = new Color(0xc0c0c0);
  public static final Color skyblue = new Color(0x87ceeb);
  public static final Color slateblue = new Color(0x6a5acd);
  public static final Color slategray = new Color(0x708090);
  public static final Color snow = new Color(0xfffafa);
  public static final Color springgreen = new Color(0x00ff7f);
  public static final Color steelblue = new Color(0x4682b4);
  public static final Color tan = new Color(0xd2b48c);
  public static final Color teal = new Color(0x008080);
  public static final Color thistle = new Color(0xd8bfd8);
  public static final Color tomato = new Color(0xff6347);
  public static final Color turquoise = new Color(0x40e0d0);
  public static final Color violet = new Color(0xee82ee);
  public static final Color wheat = new Color(0xf5deb3);
  public static final Color white = new Color(0xffffff);
  public static final Color whitesmoke = new Color(0xf5f5f5);
  public static final Color yellow = new Color(0xffff00);
  public static final Color yellowgreen = new Color(0x9acd32);
  static {
      initColorsMap();
  }
}