Retro68/gcc/libjava/classpath/java/awt/Cursor.java

/* Copyright (C) 1999, 2000, 2002  Free Software Foundation

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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permission to link this library with independent modules to produce an
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package java.awt;

/**
  * This class represents various predefined cursor types.
  *
  * @author Aaron M. Renn (arenn@urbanophile.com)
  */
public class Cursor implements java.io.Serializable
{
  static final long serialVersionUID = 8028237497568985504L;

  /**
  * Constant for the system default cursor type
  */
  public static final int DEFAULT_CURSOR = 0;

  /**
  * Constant for a cross-hair cursor.
  */
  public static final int CROSSHAIR_CURSOR = 1;

  /**
  * Constant for a cursor over a text field.
  */
  public static final int TEXT_CURSOR = 2;

  /**
  * Constant for a cursor to display while waiting for an action to complete.
  */
  public static final int WAIT_CURSOR = 3;

  /**
  * Cursor used over SW corner of window decorations.
  */
  public static final int SW_RESIZE_CURSOR = 4;

  /**
  * Cursor used over SE corner of window decorations.
  */
  public static final int SE_RESIZE_CURSOR = 5;

  /**
  * Cursor used over NW corner of window decorations.
  */
  public static final int NW_RESIZE_CURSOR = 6;

  /**
  * Cursor used over NE corner of window decorations.
  */
  public static final int NE_RESIZE_CURSOR = 7;

  /**
  * Cursor used over N edge of window decorations.
  */
  public static final int N_RESIZE_CURSOR = 8;

  /**
  * Cursor used over S edge of window decorations.
  */
  public static final int S_RESIZE_CURSOR = 9;

  /**
  * Cursor used over W edge of window decorations.
  */
  public static final int W_RESIZE_CURSOR = 10;

  /**
  * Cursor used over E edge of window decorations.
  */
  public static final int E_RESIZE_CURSOR = 11;

  /**
  * Constant for a hand cursor.
  */
  public static final int HAND_CURSOR = 12;

  /**
  * Constant for a cursor used during window move operations.
  */
  public static final int MOVE_CURSOR = 13;

  private static String[] NAMES = { "Default Cursor", "Crosshair Cursor",
                                  "Text Cursor", "Wait Cursor",
                                  "Southwest Resize Cursor",
                                  "Southeast Resize Cursor",
                                  "Northwest Resize Cursor",
                                  "Northeast Resize Cursor",
                                  "North Resize Cursor", "South Resize Cursor",
                                  "West Resize Cursor", "East Resize Cursor",
                                  "Hand Cursor", "Move Cursor" };

  public static final int CUSTOM_CURSOR    = 0xFFFFFFFF;

  private static final int PREDEFINED_COUNT = 14;

  protected static Cursor[] predefined = new Cursor[PREDEFINED_COUNT];
  protected String name;

  /**
   * @serial The numeric id of this cursor.
   */
  int type;

  /**
   * Initializes a new instance of <code>Cursor</code> with the specified
   * type.
   *
   * @param type The cursor type.
   *
   * @exception IllegalArgumentException If the specified cursor type is invalid
   */
  public Cursor(int type)
  {
    if (type < 0 || type >= PREDEFINED_COUNT)
      throw new IllegalArgumentException ("invalid cursor " + type);

    this.type = type;

    name = NAMES[type];

    // FIXME: lookup?
  }

  /** This constructor is used internally only.
   * Application code should call Toolkit.createCustomCursor().
   */
  protected Cursor(String name)
  {
    this.name = name;
    this.type = CUSTOM_CURSOR;
  }

  /**
   * Returns an instance of <code>Cursor</code> for one of the specified
   * predetermined types.
   *
   * @param type The type contant from this class.
   *
   * @return The requested predefined cursor.
   *
   * @exception IllegalArgumentException If the constant is not one of the
   * predefined cursor type constants from this class.
   */
  public static Cursor getPredefinedCursor(int type)
  {
    if (type < 0 || type >= PREDEFINED_COUNT)
      throw new IllegalArgumentException ("invalid cursor " + type);
    if (predefined[type] == null)
      predefined[type] = new Cursor(type);
    return predefined[type];
  }

  /**
   * Retrieves the system specific custom Cursor named Cursor names are,
   * for example: "Invalid.16x16".
   *
   * @exception AWTException
   * @exception HeadlessException If GraphicsEnvironment.isHeadless()
   * returns true.
   */
  public static Cursor getSystemCustomCursor(String name)
                                      throws AWTException
  {
    if (GraphicsEnvironment.isHeadless())
      throw new HeadlessException ();

    // FIXME
    return null;
  }

  /**
   * Returns an instance of the system default cursor type.
   *
   * @return The system default cursor.
   */
  public static Cursor getDefaultCursor()
  {
    return getPredefinedCursor(DEFAULT_CURSOR);
  }

  /**
   * Returns the numeric type identifier for this cursor.
   *
   * @return The cursor id.
   */
  public int getType()
  {
    return type;
  }

  public String getName()
  {
    return name;
  }

  public String toString()
  {
    return (this.getClass()
            + "[type=" + getType()
            + ",name=" + getName() + "]");
  }
}