libjava/java/awt/Component.java

/* Copyright (C) 1999, 2000, 2001, 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
the Free Software Foundation; either version 2, or (at your option)
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General Public License for more details.

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making a combined work based on this library.  Thus, the terms and
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permission to link this library with independent modules to produce an
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package java.awt;
import java.awt.event.*;
import java.awt.image.*;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.lang.reflect.*;
import java.util.EventListener;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.Vector;
import java.awt.peer.ComponentPeer;
import java.awt.peer.LightweightPeer;
import java.beans.PropertyChangeSupport;
import java.beans.PropertyChangeListener;
// import javax.accessibility.AccessibleContext;

/**
  * The root of all evil.
  *
  * Status: Incomplete. The event dispatch mechanism is implemented. All 
  * other methods defined in the J2SE 1.3 API javadoc exist, but are mostly 
  * incomplete or only stubs; except for methods relating to the Drag and Drop, 
  * Input Method, and Accessibility frameworks: These methods are present but 
  * commented out.
  */
public abstract class Component implements ImageObserver, MenuContainer, 
					   java.io.Serializable
{
  /**
   * Constant returned by the <code>getAlignmentY</code> method to indicate
   * that the component wishes to be aligned to the bottom relative to
   * other components.
   */
  public static final float BOTTOM_ALIGNMENT = (float)1.0;

  /**
   * Constant returned by the <code>getAlignmentY</code> and 
   * <code>getAlignmentX</code> methods to indicate
   * that the component wishes to be aligned to the center relative to
   * other components.
   */
  public static final float CENTER_ALIGNMENT = (float)0.5;

  /**
   * Constant returned by the <code>getAlignmentY</code> method to indicate
   * that the component wishes to be aligned to the top relative to
   * other components.
   */
  public static final float TOP_ALIGNMENT = (float)0.0;

  /**
   * Constant returned by the <code>getAlignmentX</code> method to indicate
   * that the component wishes to be aligned to the right relative to
   * other components.
   */
  public static final float RIGHT_ALIGNMENT = (float)1.0;

  /**
   * Constant returned by the <code>getAlignmentX</code> method to indicate
   * that the component wishes to be aligned to the left relative to
   * other components.
   */
  public static final float LEFT_ALIGNMENT = (float)0.0;

  /* Make the treelock a String so that it can easily be identified
     in debug dumps. We clone the String in order to avoid a conflict in 
     the unlikely event that some other package uses exactly the same string
     as a lock object. */
  static Object treeLock = new String("AWT_TREE_LOCK");

  /* Serialized fields from the serialization spec. */
  // FIXME: Default values?
  int x;
  int y;
  int width;
  int height;
  Color foreground;
  Color background;
  Font font;
  Font peerFont;
  Cursor cursor;
  Locale locale;
  boolean visible = true; // default (except for Window)
  boolean enabled = true;
  boolean valid;
  boolean hasFocus;
  //DropTarget dropTarget;
  Vector popups;
  String name;
  boolean nameExplicitlySet;
  Dimension minSize;
  Dimension prefSize;
  boolean newEventsOnly;  
  long eventMask = AWTEvent.PAINT_EVENT_MASK;
  PropertyChangeSupport changeSupport;
  boolean isPacked;
  int componentSerializedDataVersion;
  /* AccessibleContext accessibleContext; */

  /* Anything else is non-serializable, and should be declared "transient". */
  transient Container parent;
  transient java.awt.peer.ComponentPeer peer;

  transient ComponentListener componentListener;
  transient FocusListener focusListener;
  transient KeyListener keyListener;
  transient MouseListener mouseListener;
  transient MouseMotionListener mouseMotionListener;
  transient InputMethodListener inputMethodListener;
  transient HierarchyListener hierarchyListener;
  transient HierarchyBoundsListener hierarchyBoundsListener;

  transient ComponentOrientation orientation = ComponentOrientation.UNKNOWN;

  /**
   * Default constructor for subclasses.
   */
  protected Component()
  {
  }

  /**
   * Returns the name of this component.
   *
   * @return The name of this component.
   */
  public String getName()
  {
    if (name == null && !nameExplicitlySet)
      name = generateName();
    return name;
  }

  /**
   * Sets the name of this component to the specified name.
   *
   * @param name The new name of this component.
   */
  public void setName(String name)
  {
    nameExplicitlySet = true;
    this.name = name;
  }
  
  /** Subclasses should override this to return unique component names like 
    * "menuitem0".
    */
  String generateName()
  {
    // Component is abstract.
    return null;
  }

  /**
   * Returns the parent of this component.
   * 
   * @return The parent of this component.
   */
  public Container getParent()
  {
    return parent;  
  }

  // Sets the peer for this component.
  final void setPeer (ComponentPeer peer)
  {
    this.peer = peer;
  }

  /**
   * Returns the native windowing system peer for this component.
   *
   * @return The peer for this component.
   * @deprecated
   */
  // Classpath's Gtk peers rely on this.
  public java.awt.peer.ComponentPeer getPeer()
  {
    return peer;
  }

  // FIXME: java.awt.dnd classes not yet implemented
  /*
  public void setDropTarget(DropTarget dt)
  {
    this.dropTarget = dt;
  }
  
  public DropTarget getDropTarget()
  {
    return dropTarget;
  }
  */
  
  /** @since 1.3 */
  public GraphicsConfiguration getGraphicsConfiguration()
  {
    return getGraphicsConfigurationImpl();
  }

  /** Implementation method that allows classes such as Canvas and
      Window to override the graphics configuration without violating
      the published API. */
  GraphicsConfiguration getGraphicsConfigurationImpl()
  {
    if (peer != null)
      {
	GraphicsConfiguration config = peer.getGraphicsConfiguration();
	if (config != null)
	  return config;
      }

    if (parent != null)
      return parent.getGraphicsConfiguration();

    return null;
  }

  /**
   * Returns the object used for synchronization locks on this component
   * when performing tree and layout functions.
   *
   * @return The synchronization lock for this component.
   */
  public final Object getTreeLock()
  {
    return treeLock;
  }

  // The sync lock object for this component.
  final void setTreeLock(Object tree_lock)
  {
    this.treeLock = tree_lock;
  }

  /**
   * Returns the toolkit in use for this component.
   *
   * @return The toolkit for this component.
   */
  public Toolkit getToolkit()
  {
    if (peer != null)
      {
	Toolkit tk = peer.getToolkit();
	if (tk != null)
	  return tk;
      }
    if (parent != null)
      return parent.getToolkit ();
    return Toolkit.getDefaultToolkit ();
  }

  /**
   * Tests whether or not this component is valid.  A invalid component needs
   * to have its layout redone.
   *
   * @return <code>true</code> if this component is valid, <code>false</code>
   * otherwise.
   */
  public boolean isValid()
  {
    return valid;
  }
  
  /** @since 1.2 */
  public boolean isDisplayable()
  {
    if (parent != null)
      return parent.isDisplayable();
    return false;
  }

  /**
   * Tests whether or not this component is visible.
   *
   * @return <code>true</code> if the component is visible,
   * <code>false</code> otherwise.
   */
  public boolean isVisible()
  {
    return visible;
  }

  /**
   * Tests whether or not this component is actually being shown on
   * the screen.  This will be true if and only if it this component is
   * visible and its parent components are all visible.
   *
   * @return <code>true</code> if the component is showing on the screen,
   * <code>false</code> otherwise.
   */
  public boolean isShowing()
  {
    if (! visible || peer == null)
      return false;

    return parent == null ? true : parent.isShowing ();
  }

  /**
   * Tests whether or not this component is enabled.
   *
   * @return <code>true</code> if the component is enabled,
   * <code>false</code> otherwise.
   */
  public boolean isEnabled()
  {
    return enabled;
  }

  /**
   * Enables or disables this component.
   *
   * @param enabled <code>true</code> to enable this component, 
   * <code>false</code> to disable it.
   *
   * @deprecated Deprecated in favor of <code>setEnabled()</code>.
   */
  public void setEnabled(boolean b)
  {
    this.enabled = b;
    if (peer != null)
      peer.setEnabled(b);
  }

  /**
   * Enables this component.
   *
   * @deprecated Deprecated in favor of <code>setEnabled()</code>.
   */
  public void enable()
  {
    setEnabled(true);
  }

  /**
   * Enables or disables this component.
   *
   * @param enabled <code>true</code> to enable this component, 
   * <code>false</code> to disable it.
   *
   * @deprecated Deprecated in favor of <code>setEnabled()</code>.
   */
  public void enable(boolean b)
  {
    setEnabled(b);
  }

  /**
   * Disables this component.
   *
   * @deprecated Deprecated in favor of <code>setEnabled()</code>.
   */
  public void disable()
  {
    setEnabled(false);
  }

  public boolean isDoubleBuffered()
  {
    return false;
  }

  /** @since 1.2 */
  public void enableInputMethods(boolean enable)
  {
    // FIXME
  }

  /**
   * Makes this component visible or invisible.
   *
   * @param visible <code>true</code> to make this component visible,
   * </code>false</code> to make it invisible.
   * @specnote  Inspection by subclassing shows that Sun's implementation
   * calls show(boolean) which then calls show() or hide(). It is
   * the show() method that is overriden in subclasses like Window.
   * We do the same to preserve compatibility for subclasses.
   */
  public void setVisible(boolean b)
  {
    if (peer != null)
      peer.setVisible (b);
    this.visible = b;
  }

  /**
   * Makes this component visible on the screen.
   *
   * @deprecated Deprecated in favor of <code>setVisible()</code>.
   */
  public void show()
  {
    setVisible (true);
  }

  /**
   * Makes this component visible or invisible.
   *
   * @param visible <code>true</code> to make this component visible,
   * </code>false</code> to make it invisible.
   *
   * @deprecated Deprecated in favor of <code>setVisible()</code>.
   */
  public void show(boolean b)
  {
    setVisible (b);
  }

  /**
   * Hides this component so that it is no longer shown on the screen.
   *
   * @deprecated Deprecated in favor of <code>setVisible()</code>.
   */
  public void hide()
  {
    setVisible (false);
  }

  /**
   * Returns this component's foreground color.
   *
   * @return This component's foreground color.
   */
  public Color getForeground()
  {
    if (foreground != null)
      return foreground;
    if (parent != null)
      return parent.getForeground();
    return null;
  }

  /**
   * Sets this component's foreground color to the specified color.
   *
   * @param foreground_color The new foreground color.
   */
  public void setForeground(Color c)
  {
    if (peer != null)
      peer.setForeground(c);
    this.foreground = c;
  }

  /**
   * Returns this component's background color.
   *
   * @return the background color of the component. null may be
   * returned instead of the actual background color, if this
   * method is called before the component is added to the
   * component hierarchy.
   */
  public Color getBackground()
  {
    if (background != null)
      return background;
    if (parent != null)
      return parent.getBackground();
    return null;
  }

  /**
   * Sets this component's background color to the specified color.
   *
   * @param background_color The new background color
   */
  public void setBackground(Color c)
  {
    if (peer != null)
      peer.setBackground(c);
    this.background = c;
  }

  /**
   * Returns the font in use for this component.
   *
   * @return The font for this component.
   */
  public Font getFont()
  {
    if (font != null)
      return font;
    if (parent != null)
      return parent.getFont();
    return null;
  }

  /**
   * Sets the font for this component to the specified font.
   *
   * @param font The new font for this component.
   */
  public void setFont(Font f)
  {
    if (peer != null)
      peer.setFont(f);
    this.font = f;
  }

  /**
   * Returns the locale for this component.  If this component does not
   * have a locale, the locale of the parent component is returned.  If the
   * component has no parent, the system default locale is returned.
   *
   * @return The locale for this component.
   */
  public Locale getLocale() throws IllegalComponentStateException
  {
    if (locale != null)
      return locale;
    if (parent == null)
      throw new IllegalComponentStateException
        ("Component has no parent: Can not determine Locale");
    return parent.getLocale();
  }

  /**
   * Sets the locale for this component to the specified locale.
   *
   * @param locale The new locale for this component.
   */
  public void setLocale(Locale l)  
  {
    this.locale = l;

    /* new writing/layout direction perhaps, or make more/less
       room for localized text labels */
    invalidate();
  }

  /**
   * Returns the color model of the device this componet is displayed on.
   *
   * @return This object's color model.
   */
  public ColorModel getColorModel()
  {
    GraphicsConfiguration config = getGraphicsConfiguration();

    if (config != null)
      return config.getColorModel();

    return getToolkit().getColorModel();    
  }

  /**
   * Returns the location of this component's top left corner relative to
   * its parent component.
   *
   * @return The location of this component.
   */
  public Point getLocation()
  {
    return new Point(x, y);
  }

  /**
   * Returns the location of this component's top left corner in screen
   * coordinates.
   *
   * @return The location of this component in screen coordinates.
   */
  public Point getLocationOnScreen()
  {
    if (! isShowing ())
      throw new IllegalComponentStateException ("component not showing");

    // We know peer != null here.
    return peer.getLocationOnScreen ();
  }

  /**
   * Returns the location of this component's top left corner relative to
   * its parent component.
   *
   * @return The location of this component.
   *
   * @deprecated This method is deprecated in favor of 
   * <code>getLocation()</code>.
   */
  public Point location()
  {
    return getLocation();
  }

  /**
   * Moves this component to the specified location.  The coordinates are
   * the new upper left corner of this component.
   *
   * @param x The new X coordinate of this component.
   * @param y The new Y coordinate of this component.
   */
  public void setLocation (int x, int y)
  {
    if ((this.x == x) && (this.y == y))
      return;

    invalidate();

    this.x = x;
    this.y = y;
    if (peer != null)
      peer.setBounds(x, y, width, height);
  }

  /**
   * Moves this component to the specified location.  The coordinates are
   * the new upper left corner of this component.
   *
   * @param x The new X coordinate of this component.
   * @param y The new Y coordinate of this component.
   *
   * @deprecated Deprecated in favor for <code>setLocation</code>.
   */
  public void move(int x, int y)
  {
    setLocation(x,y);
  }

  /**
   * Moves this component to the specified location.  The coordinates are
   * the new upper left corner of this component.
   *
   * @param p New coordinates for this component.
   */
  public void setLocation(Point p)
  {
    setLocation(p.x, p.y);
  }

  /**
   * Returns the size of this object.
   *
   * @return The size of this object.
   */
  public Dimension getSize()
  {
    return new Dimension(width, height);
  }

  /**
   * Returns the size of this object.
   *
   * @return The size of this object.
   *
   * @deprecated This method is deprecated in favor of <code>getSize</code>.
   */
  public Dimension size()
  {
    return getSize();
  }

  /**
   * Sets the size of this component to the specified width and height.
   * 
   * @param width The new width of this component.
   * @param height The new height of this component.
   */
  public void setSize(int width, int height)
  {
    if ((this.width == width) && (this.height == height))
      return;

    invalidate();

    this.width = width;
    this.height = height;
    if (peer != null)
      peer.setBounds(x, y, width, height);
  }

  /**
   * Sets the size of this component to the specified value.
   * 
   * @param width The new width of the component.
   * @param height The new height of the component.
   *
   * @deprecated This method is deprecated in favor of <code>setSize</code>.
   */
  public void resize(int width, int height)
  {
    setSize(width, height);
  }

  /**
   * Sets the size of this component to the specified value.
   * 
   * @param dim The new size of this component.
   */
  public void setSize(Dimension d)
  {
    setSize(d.width, d.height);
  }

  /**
   * Sets the size of this component to the specified value.
   * 
   * @param dim The new size of this component.
   *
   * @deprecated This method is deprecated in favor of <code>setSize</code>.
   */
  public void resize(Dimension d)
  {
    setSize(d.width, d.height);
  }

  /**
   * Returns a bounding rectangle for this component.  Note that the
   * returned rectange is relative to this component's parent, not to
   * the screen.
   *
   * @return The bounding rectangle for this component.
   */
  public Rectangle getBounds()
  {
    return new Rectangle (x, y, width, height);
  }

  /**
   * Returns a bounding rectangle for this component.  Note that the
   * returned rectange is relative to this component's parent, not to
   * the screen.
   *
   * @return The bounding rectangle for this component.
   *
   * @deprecated Deprecated in favor of <code>getBounds()</code>.
   */
  public Rectangle bounds()
  {
    return getBounds();
  }

  /**
   * Sets the bounding rectangle for this component to the specified
   * values.  Note that these coordinates are relative to the parent,
   * not to the screen.
   *
   * @param x The X coordinate of the upper left corner of the rectangle.
   * @param y The Y coordinate of the upper left corner of the rectangle.
   * @param width The width of the rectangle.
   * @param height The height of the rectangle.
   */
  public void setBounds(int x, int y, int w, int h)
  {
    if (this.x == x
	&& this.y == y
	&& this.width == w
	&& this.height == h)
      return;

    invalidate();

    this.x = x;
    this.y = y;
    this.width = w;
    this.height = h;

    if (peer != null)
      peer.setBounds(x, y, w, h);
  }

  /**
   * Sets the bounding rectangle for this component to the specified
   * values.  Note that these coordinates are relative to the parent,
   * not to the screen.
   *
   * @param x The X coordinate of the upper left corner of the rectangle.
   * @param y The Y coordinate of the upper left corner of the rectangle.
   * @param width The width of the rectangle.
   * @param height The height of the rectangle.
   *
   * @deprecated This method is deprecated in favor of
   * <code>setBounds(int, int, int, int)</code>.
   */
  public void reshape(int x, int y, int width, int height)
  {
    setBounds(x, y, width, height);
  }

  /**
   * Sets the bounding rectangle for this component to the specified
   * rectangle.  Note that these coordinates are relative to the parent,
   * not to the screen.
   *
   * @param bounding_rectangle The new bounding rectangle.
   */
  public void setBounds(Rectangle r)
  { 
    setBounds(r.x, r.y, r.width, r.height);
  }
  
  /** @since 1.2 */
  public int getX()
  {
    return x;
  }
  
  /** @since 1.2 */
  public int getY()
  {
    return y;
  }
  
  /** @since 1.2 */
  public int getWidth()
  {
    return width;
  }
  
  /** @since 1.2 */
  public int getHeight()
  {
    return height;
  }
  
  public Rectangle getBounds(Rectangle r)
  {
    r.x = this.x;
    r.y = this.y;
    r.width = this.width;
    r.height = this.height;
    return r;
  }
  
  public Dimension getSize(Dimension d)
  {
    d.width = this.width;
    d.height = this.height;
    return d;
  }
  
  public Point getLocation(Point p)
  {
    p.x = x;
    p.y = y;
    return p;
  }
  
  /** @since 1.2 */
  public boolean isOpaque()
  {
    return !isLightweight();
  }
  
  /** 
   * Return whether the component is lightweight.
   *
   * @return true if component has a peer and and the peer is lightweight.
   *
   * @since 1.2
   */  
  public boolean isLightweight()
  {
    return (peer != null) && (peer instanceof LightweightPeer);
  }

  /**
   * Returns the component's preferred size.
   *
   * @return The component's preferred size.
   */
  public Dimension getPreferredSize()
  {
    if (peer == null)
      return new Dimension(width, height);
    else
      return peer.getPreferredSize();
  }

  /**
   * Returns the component's preferred size.
   *
   * @return The component's preferred size.
   *
   * @deprecated Deprecated in favor of <code>getPreferredSize()</code>.
   */
  public Dimension preferredSize()
  {
    return getPreferredSize();
  }

  /**
   * Returns the component's minimum size.
   *
   * @return The component's minimum size.
   */
  public Dimension getMinimumSize()
  {
    if (peer == null)
      return new Dimension(width, height);
    else
      return peer.getMinimumSize();
  }

  /**
   * Returns the component's minimum size.
   *
   * @return The component's minimum size.
   *
   * @deprecated Deprecated in favor of <code>getMinimumSize()</code>
   */
  public Dimension minimumSize()
  {
    return getMinimumSize();
  }

  /**
   * Returns the component's maximum size.
   *
   * @return The component's maximum size.
   */
  public Dimension getMaximumSize()
  {
    return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE);
  }

  /**
   * Returns the preferred horizontal alignment of this component.  The
   * value returned will be one of the constants defined in this class.
   *
   * @return The preferred horizontal alignment of this component.
   */
  public float getAlignmentX()
  {
    return CENTER_ALIGNMENT;
  }

  /**
   * Returns the preferred vertical alignment of this component.  The
   * value returned will be one of the constants defined in this class.
   *
   * @return The preferred vertical alignment of this component.
   */
  public float getAlignmentY()
  {
    return CENTER_ALIGNMENT;
  }

  /**
   * Calls the layout manager to re-layout the component.  This is called
   * during validation of a container in most cases.
   */
  public void doLayout()
  {
    // nothing to do unless we're a container
  }

  /**
   * Calls the layout manager to re-layout the component.  This is called
   * during validation of a container in most cases.
   *
   * @deprecated This method is deprecated in favor of <code>doLayout()</code>.
   */
  public void layout()
  {
    doLayout();
  }

  /**
   * Called to ensure that the layout for this component is valid.
   */
  public void validate()
  {
    valid = true;
  }

  /**
   * Invalidates this component and all of its parent components.  This will
   * cause them to have their layout redone.
   */
  public void invalidate()
  {
    valid = false;

    if ((parent != null) && parent.valid)
      parent.invalidate ();
  }

  /**
   * Returns a graphics object for this component.  Returns <code>null</code>
   * if this component is not currently displayed on the screen.
   *
   * @return A graphics object for this component.
   */
  public Graphics getGraphics()
  {
    if (peer != null)
      {
	Graphics gfx = peer.getGraphics();
	if (gfx != null)
	  return gfx;
      
	// create graphics for lightweight:
	Container parent = getParent();
	if (parent != null)
	  {
	    gfx = parent.getGraphics();
	    Rectangle bounds = getBounds();
	    gfx.setClip(bounds);
	    gfx.translate(bounds.x, bounds.y);
	    return gfx;
	  }
      }
    return null;
  }

  /**
   * Returns the font metrics for the specified font in this component.
   *
   * @param font The font to retrieve metrics for.
   *
   * @return The font metrics for the specified font.
   */
  public FontMetrics getFontMetrics(Font font)
  {
    if (peer == null)
      return getToolkit().getFontMetrics(font);
    return peer.getFontMetrics (font);
  }

  /**
   * Sets the cursor for this component to the specified cursor.
   *
   * @param cursor The new cursor for this component.
   */
  public void setCursor(Cursor cursor)
  {
    this.cursor = cursor;
    if (peer != null)
      peer.setCursor (cursor);
  }

  /**
   * Returns the cursor for this component.
   *
   * @return The cursor for this component.
   */
  public Cursor getCursor()
  {
    return this.cursor;
  }

  /**
   * Paints this component on the screen.  The clipping region in the
   * graphics context will indicate the region that requires painting.
   *
   * @param graphics The graphics context for this paint job.
   */
  public void paint(Graphics g)
  {
  }

  /**
   * Updates this component.  This method fills the component
   * with the background color, then sets the foreground color of the
   * specified graphics context to the foreground color of this component
   * and calls the <code>paint()</code> method.
   * // FIXME: What are the coords relative to?
   *
   * @param graphics The graphics context for this update.
   */
  public void update(Graphics g)
  {
    paint(g);
  }

  /**
   * Paints this entire component, including any sub-components.
   *
   * @param graphics The graphics context for this paint job.
   */
  public void paintAll(Graphics g)
  {    
    if (!visible)
      return;
	
    if (peer != null)
      peer.paint(g);
    paint(g);
  }

  /**
   * Repaint this entire component.  The <code>update()</code> method
   * on this component will be called as soon as possible.
   * // FIXME: What are the coords relative to?
   */
  public void repaint()
  {
    repaint(0, 0, 0, getWidth(), getHeight());
  }

  /**
   * Repaint this entire component.  The <code>update()</code> method
   * on this component will be called in approximate the specified number
   * of milliseconds.
   * // FIXME: What are the coords relative to?
   *
   * @param tm The number of milliseconds before this component should
   * be repainted.
   */
  public void repaint(long tm)
  {
    repaint(tm, 0, 0, getWidth(), getHeight());
  }

  /**
   * Repaints the specified rectangular region within this component.
   * This <code>update</code> method on this component will be called as
   * soon as possible.
   * // FIXME: What are the coords relative to?
   *
   * @param x The X coordinate of the upper left of the region to repaint
   * @param y The Y coordinate of the upper left of the region to repaint
   * @param width The width of the region to repaint.
   * @param height The height of the region to repaint.
   */
  public void repaint(int x, int y, int width, int height)
  {
    repaint(0, x, y, width, height);
  }

  /**
   * Repaints the specified rectangular region within this component.
   * This <code>update</code> method on this component will be called in
   * approximately the specified number of milliseconds.
   * // FIXME: What are the coords relative to?
   *
   * @param tm The number of milliseconds before this component should
   * be repainted.
   * @param x The X coordinate of the upper left of the region to repaint
   * @param y The Y coordinate of the upper left of the region to repaint
   * @param width The width of the region to repaint.
   * @param height The height of the region to repaint.
   */
  public void repaint(long tm, int x, int y, int width, int height)
  {    
    // Handle lightweight repainting by forwarding to native parent
    if (isLightweight() && (parent != null))
      {
	if (parent != null)
	  parent.repaint(tm, x+getX(), y+getY(), width, height);
	return;
      }

    if (peer != null)
      peer.repaint(tm, x, y, width, height);
  }

  /**
   * Prints this component.  This method is
   * provided so that printing can be done in a different manner from
   * painting.  However, the implementation in this class simply calls
   * the <code>paint()</code> method.
   *
   * @param graphics The graphics context of the print device.
   */
  public void print(Graphics g)
  {
    paint(g);
  }

  /**
   * Prints this component, including all sub-components.  This method is
   * provided so that printing can be done in a different manner from
   * painting.  However, the implementation in this class simply calls
   * the <code>paintAll()</code> method.
   *
   * @param graphics The graphics context of the print device.
   */
  public void printAll(Graphics g)
  {
    paintAll(g);
  }

  /**
   * Called when an image has changed so that this component is
   * repainted.
   *
   * @param image The image that has been updated.
   * @param flags Flags as specified in <code>ImageObserver</code>.
   * @param x The X coordinate 
   * @param y The Y coordinate
   * @param width The width
   * @param height The height
   *
   * @return <code>true</code> if the image has been fully loaded,
   * <code>false</code> otherwise.
   */
  public boolean imageUpdate (Image img, int infoflags, int x, int y,
			      int w, int h)
  {
    // FIXME
    return false;
  }

  /**
   * Creates an image from the specified producer.
   *
   * @param producer The image procedure to create the image from.
   *
   * @return The resulting image.
   */
  public Image createImage(ImageProducer producer)
  {
    return peer.createImage(producer);
  }

  /**
   * Creates an image with the specified width and height for use in
   * double buffering.
   *
   * @param width The width of the image.
   * @param height The height of the image.
   *
   * @return The requested image.
   */
  public Image createImage(int width, int height)
  {
    return getGraphicsConfiguration().createCompatibleImage(width, height);
  }

  /**
   * Prepares the specified image for rendering on this component.
   *
   * @param image The image to prepare for rendering.
   * @param observer The image observer to notify of the status of the
   * image preparation.
   *
   * @return <code>true</code> if the image is already fully prepared
   * for rendering, <code>false</code> otherwise.
   */
  public boolean prepareImage(Image image, ImageObserver observer)
  {
    return prepareImage(image, image.getWidth(observer), 
			image.getHeight(observer), observer);
  }

  /**
   * Prepares the specified image for rendering on this component at the
   * specified scaled width and height
   *
   * @param image The image to prepare for rendering.
   * @param width The scaled width of the image.
   * @param height The scaled height of the image.
   * @param observer The image observer to notify of the status of the
   * image preparation.
   *
   * @return <code>true</code> if the image is already fully prepared
   * for rendering, <code>false</code> otherwise.
   */
  public boolean prepareImage(Image image, int width, int height,
			      ImageObserver observer)
  {
    return peer.prepareImage(image, width, height, observer);
  }

  /**
   * Returns the status of the loading of the specified image. The value
   * returned will be those flags defined in <code>ImageObserver</code>.
   *
   * @param image The image to check on.
   * @param observer The observer to be notified as the image loading
   * progresses.
   *
   * @return The image observer flags indicating the status of the load.
   */
  public int checkImage(Image image, ImageObserver observer)
  {
    return checkImage(image, image.getWidth(observer), 
		      image.getHeight(observer), observer);
  }

  /**
   * Returns the status of the loading of the specified image. The value
   * returned will be those flags defined in <code>ImageObserver</code>.
   *
   * @param image The image to check on.
   * @param width The scaled image width.
   * @param height The scaled image height.
   * @param observer The observer to be notified as the image loading
   * progresses.
   *
   * @return The image observer flags indicating the status of the load.
   */
  public int checkImage (Image image, int width, int height,
			 ImageObserver observer)
  {
    if (peer != null)
      return peer.checkImage (image, width, height, observer);
    return getToolkit ().checkImage (image, width, height, observer);
  }

  /**
   * Tests whether or not the specified point is contained within this
   * component.  Coordinates are relative to this component.
   *
   * @param x The X coordinate of the point to test.
   * @param y The Y coordinate of the point to test.
   *
   * @return <code>true</code> if the point is within this component,
   * <code>false</code> otherwise.
   */
  public boolean contains (int x, int y)
  {
    return (x >= 0) && (y >= 0) && (x < width) && (y < height);
  }

  /**
   * Tests whether or not the specified point is contained within this
   * component.  Coordinates are relative to this component.
   *
   * @param x The X coordinate of the point to test.
   * @param y The Y coordinate of the point to test.
   *
   * @return <code>true</code> if the point is within this component,
   * <code>false</code> otherwise.
   *
   * @deprecated Deprecated in favor of <code>contains(int, int)</code>.
   */
  public boolean inside(int x, int y)
  {
    return contains(x,y);
  }

  /**
   * Tests whether or not the specified point is contained within this
   * component.  Coordinates are relative to this component.
   *
   * @param point The point to test.
   *
   * @return <code>true</code> if the point is within this component,
   * <code>false</code> otherwise.
   */
  public boolean contains(Point p)
  {
    return contains(p.x, p.y);
  }

  /**
   * Returns the component occupying the position (x,y).  This will either
   * be this component, an immediate child component, or <code>null</code>
   * if neither of the first two occupies the specified location.
   *
   * @param x The X coordinate to search for components at.
   * @param y The Y coordinate to search for components at.
   *
   * @return The component at the specified location, for <code>null</code>
   * if there is none.
   */
  public Component getComponentAt(int x, int y)
  {
    if (contains(x,y))
      return this;
    return null;
  }

  /**
   * Returns the component occupying the position (x,y).  This will either
   * be this component, an immediate child component, or <code>null</code>
   * if neither of the first two occupies the specified location.
   *
   * @param x The X coordinate to search for components at.
   * @param y The Y coordinate to search for components at.
   *
   * @return The component at the specified location, for <code>null</code>
   * if there is none.
   *
   * @deprecated The method is deprecated in favor of 
   * <code>getComponentAt()</code>.
   */
  public Component locate(int x, int y)
  {
    return getComponentAt(x, y);
  }

  /**
   * Returns the component occupying the specified point  This will either
   * be this component, an immediate child component, or <code>null</code>
   * if neither of the first two occupies the specified location.
   *
   * @param point The point to search for components at.
   *
   * @return The component at the specified location, for <code>null</code>
   * if there is none.
   */
  public Component getComponentAt(Point p)
  {
    return getComponentAt(p.x, p.y);
  }

  /**
   * AWT 1.0 event dispatcher.
   *
   * @deprecated Deprecated in favor of <code>dispatchEvent()</code>.
   */
  public void deliverEvent(Event e)
  {
  }

  /** Forward AWT events to processEvent() if:
    *     - Events have been enabled for this type of event via enableEvents(),
    *   OR:
    *	 - There is at least one registered listener for this type of event
    * 
    * @param event The event to dispatch
    *
    * @specnote This method is final, but we need to be able to 
    *           override it in order to handle other event types in our 
    *	        subclasses. The solution is to define a second, non-final
    *           method - dispatchEventImpl() - to actually do the work. 
    *           Investigations with Thread.dumpStack() on the dispatch thread 
    *           in JDK 1.3 show Sun's implementation is doing the same 
    *           thing.
    */
  public final void dispatchEvent(AWTEvent e)
  {
    dispatchEventImpl(e);

    /* Give the peer a chance to handle the event. */
    if (peer != null)
      peer.handleEvent(e);
  }

  void dispatchEventImpl(AWTEvent e)
  {
    // Make use of event id's in order to avoid multiple instanceof tests.
    if (e.id <= ComponentEvent.COMPONENT_LAST 
        && e.id >= ComponentEvent.COMPONENT_FIRST
        && (componentListener != null 
	    || (eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0))
      processEvent(e);
    else if (e.id <= KeyEvent.KEY_LAST
             && e.id >= KeyEvent.KEY_FIRST
	     && (keyListener != null
		 || (eventMask & AWTEvent.KEY_EVENT_MASK) != 0))
      processEvent(e);
    else if (e.id <= MouseEvent.MOUSE_LAST
             && e.id >= MouseEvent.MOUSE_FIRST
	     && (mouseListener != null
		 || mouseMotionListener != null
		 || (eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0))
      processEvent(e);
    else if (e.id <= FocusEvent.FOCUS_LAST
             && e.id >= FocusEvent.FOCUS_FIRST
	     && (focusListener != null
		 || (eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0))
      processEvent(e);
    else if (e.id <= InputMethodEvent.INPUT_METHOD_LAST
             && e.id >= InputMethodEvent.INPUT_METHOD_FIRST
	     && (inputMethodListener != null
		 || (eventMask & AWTEvent.INPUT_METHOD_EVENT_MASK) != 0))
      processEvent(e);
    else if (e.id <= HierarchyEvent.HIERARCHY_LAST
             && e.id >= HierarchyEvent.HIERARCHY_FIRST
	     && (hierarchyListener != null
		 || hierarchyBoundsListener != null
		 || (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0))
      processEvent(e);
    else if (e.id <= PaintEvent.PAINT_LAST
	     && e.id >= PaintEvent.PAINT_FIRST
	     && (eventMask & AWTEvent.PAINT_EVENT_MASK) != 0)      
      processEvent(e);
  }
  
  /**
   * AWT 1.0 event dispatcher.
   *
   * @deprecated Deprecated in favor of <code>dispatchEvent()</code>.
   */
  public boolean postEvent(Event e)
  {
    return false;
  }

  /**
   * Adds the specified listener to this component.
   *
   * @param listener The new listener to add.
   */
  public synchronized void addComponentListener(ComponentListener l)
  {
    componentListener = AWTEventMulticaster.add(componentListener, l);
    if (componentListener != null)
      enableEvents(AWTEvent.COMPONENT_EVENT_MASK);
  }

  /**
   * Removes the specified listener from the component.
   *
   * @param listener The listener to remove.
   */
  public synchronized void removeComponentListener(ComponentListener l)
  {
    componentListener = AWTEventMulticaster.remove(componentListener, l);
  }

  /**
   * Adds the specified listener to this component.
   *
   * @param listener The new listener to add.
   */
  public synchronized void addFocusListener(FocusListener l)
  {
    focusListener = AWTEventMulticaster.add(focusListener, l);
    if (focusListener != null)
      enableEvents(AWTEvent.FOCUS_EVENT_MASK);    
  }

  /**
   * Removes the specified listener from the component.
   *
   * @param listener The listener to remove.
   */
  public synchronized void removeFocusListener(FocusListener l)
  {
    focusListener = AWTEventMulticaster.remove(focusListener, l);
  }
  
  /** @since 1.3 */
  public synchronized void addHierarchyListener(HierarchyListener l)
  {
    hierarchyListener = AWTEventMulticaster.add(hierarchyListener, l);
    if (hierarchyListener != null)
      enableEvents(AWTEvent.HIERARCHY_EVENT_MASK);    
  }
  
  /** @since 1.3 */
  public synchronized void removeHierarchyListener(HierarchyListener l)
  {
    hierarchyListener = AWTEventMulticaster.remove(hierarchyListener, l);
  }

  /** @since 1.3 */
  public synchronized void addHierarchyBoundsListener(HierarchyBoundsListener l)
  {
    hierarchyBoundsListener = 
      AWTEventMulticaster.add(hierarchyBoundsListener, l);
    if (hierarchyBoundsListener != null)
      enableEvents(AWTEvent.HIERARCHY_EVENT_MASK);    
  }

  /** @since 1.3 */
  public synchronized void 
    removeHierarchyBoundsListener(HierarchyBoundsListener l)
  {
    hierarchyBoundsListener = 
      AWTEventMulticaster.remove(hierarchyBoundsListener, l);
  }

  /**
   * Adds the specified listener to this component.
   *
   * @param listener The new listener to add.
   */
  public synchronized void addKeyListener(KeyListener l)
  {
    keyListener = AWTEventMulticaster.add(keyListener, l);
    if (keyListener != null)
      enableEvents(AWTEvent.KEY_EVENT_MASK);    
  }

  /**
   * Removes the specified listener from the component.
   *
   * @param listener The listener to remove.
   */
  public synchronized void removeKeyListener(KeyListener l)
  {
    keyListener = AWTEventMulticaster.remove(keyListener, l);
  }

  /**
   * Adds the specified listener to this component.
   *
   * @param listener The new listener to add.
   */
  public synchronized void addMouseListener(MouseListener l)
  {
    mouseListener = AWTEventMulticaster.add(mouseListener, l);
    if (mouseListener != null)
      enableEvents(AWTEvent.MOUSE_EVENT_MASK);    
  }

  /**
   * Removes the specified listener from the component.
   *
   * @param listener The listener to remove.
   */
  public synchronized void removeMouseListener(MouseListener l)
  {
    mouseListener = AWTEventMulticaster.remove(mouseListener, l);    
  }

  /**
   * Adds the specified listener to this component.
   *
   * @param listener The new listener to add.
   */
  public synchronized void addMouseMotionListener(MouseMotionListener l)
  {
    mouseMotionListener = AWTEventMulticaster.add(mouseMotionListener, l);
    if (mouseMotionListener != null)
      enableEvents(AWTEvent.MOUSE_EVENT_MASK);    
  }

  /**
   * Removes the specified listener from the component.
   *
   * @param listener The listener to remove.
   */
  public synchronized void removeMouseMotionListener(MouseMotionListener l)
  {
    mouseMotionListener = AWTEventMulticaster.remove(mouseMotionListener, l);
  }

  /** @since 1.2 */
  public synchronized void addInputMethodListener(InputMethodListener l)
  {
    inputMethodListener = AWTEventMulticaster.add(inputMethodListener, l);
    if (inputMethodListener != null)
      enableEvents(AWTEvent.INPUT_METHOD_EVENT_MASK);    
  }

  /** @since 1.2 */
  public synchronized void removeInputMethodListener(InputMethodListener l)
  {
    inputMethodListener = AWTEventMulticaster.remove(inputMethodListener, l);
  }

  /** Returns all registered EventListers of the given listenerType. 
    * listenerType must be a subclass of EventListener, or a 
    * ClassClassException is thrown.
    * @since 1.3 
    */
  public EventListener[] getListeners(Class listenerType)
  {
    if (listenerType == ComponentListener.class)
      return getListenersImpl(listenerType, componentListener);
    else if (listenerType == FocusListener.class)
      return getListenersImpl(listenerType, focusListener);
    else if (listenerType == KeyListener.class)
      return getListenersImpl(listenerType, keyListener);
    else if (listenerType == MouseListener.class)
      return getListenersImpl(listenerType, mouseListener);
    else if (listenerType == MouseMotionListener.class)
      return getListenersImpl(listenerType, mouseMotionListener);
    else if (listenerType == InputMethodListener.class)
      return getListenersImpl(listenerType, inputMethodListener);
    else if (listenerType == HierarchyListener.class)
      return getListenersImpl(listenerType, hierarchyListener);
    else if (listenerType == HierarchyBoundsListener.class)
      return getListenersImpl(listenerType, hierarchyBoundsListener);
    else
      return getListenersImpl(listenerType, null);
  }
  
  static EventListener[] getListenersImpl(Class listenerType, EventListener el)
  {
    if (! EventListener.class.isAssignableFrom(listenerType))
      throw new ClassCastException();
    
    Vector v = new Vector();
    if (el != null)
      getListenerList (el, v);    
    EventListener[] el_a = (EventListener[]) Array.newInstance(listenerType, 
							       v.size());
    v.copyInto(el_a);
    return el_a;
  }

  static void getListenerList(EventListener el, Vector v)
  {
    if (el instanceof AWTEventMulticaster)
      {
        AWTEventMulticaster mc = (AWTEventMulticaster) el;
        getListenerList(mc.a, v);
	getListenerList(mc.b, v);
      }
    else
      v.addElement(el);      
  }

  // The input method framework is currently unimplemented.  
  // /** @since 1.2 */
  //
  //public InputMethodRequests getInputMethodRequests()
  //
  // /** @since 1.2 */
  //
  // public InputContext getInputContext()

  /**
   * Enables the specified events.  The events to enable are specified
   * by OR-ing together the desired masks from <code>AWTEvent</code>.
   * <p>
   * Events are enabled by default when a listener is attached to the
   * component for that event type.  This method can be used by subclasses
   * to ensure the delivery of a specified event regardless of whether
   * or not a listener is attached.
   *
   * @param enable_events The desired events to enable.
   */
  protected final void enableEvents(long eventsToEnable)
  {
    eventMask |= eventsToEnable;
    // TODO: Unlike Sun's implementation, I think we should try and 
    // enable/disable events at the peer (gtk/X) level. This will avoid 
    // clogging the event pipeline with useless mousemove events that 
    // we arn't interested in, etc. This will involve extending the peer 
    // interface, but thats okay because the peer interfaces have been
    // deprecated for a long time, and no longer feature in the 
    // API specification at all.

    if (isLightweight() && (parent != null))
      parent.enableEvents(eventsToEnable);
    else if (peer != null)
      peer.setEventMask (eventMask);
  }

  /**
   * Disables the specified events.  The events to disable are specified
   * by OR-ing together the desired masks from <code>AWTEvent</code>.
   *
   * @param disable_events The desired events to disable.
   */
  protected final void disableEvents(long eventsToDisable)
  {
    eventMask &= ~eventsToDisable;
    // forward new event mask to peer?
  }

  /** coalesceEvents is called by the EventQueue if two events with the same 
    * event id are queued. Returns a new combined event, or null if no 
    * combining is done. 
    */
  protected AWTEvent coalesceEvents(AWTEvent existingEvent, AWTEvent newEvent)
  {
    switch (existingEvent.id)
      {
      case MouseEvent.MOUSE_MOVED:
      case MouseEvent.MOUSE_DRAGGED:
	// Just drop the old (intermediate) event and return the new one.
	return newEvent;
      case PaintEvent.PAINT:
      case PaintEvent.UPDATE:
	return coalescePaintEvents((PaintEvent) existingEvent,
				   (PaintEvent) newEvent);
      }
    return null;
  }
  
  /**
   * Coalesce paint events. Current heuristic is: Merge if the union of
   * areas is less than twice that of the sum of the areas. The X server
   * tend to create a lot of paint events that are adjacent but not
   * overlapping.
   *
   * <pre>
   * +------+
   * |      +-----+  ...will be merged
   * |      |     |
   * |      |     |
   * +------+     |
   *        +-----+
   * 
   * +---------------+--+
   * |               |  |  ...will not be merged
   * +---------------+  |
   *                 |  |
   *                 |  |
   *                 |  |
   *                 |  |
   *                 |  |
   *                 +--+
   * </pre>
   */
  private PaintEvent coalescePaintEvents(PaintEvent queuedEvent,
					 PaintEvent newEvent)
  {
    Rectangle r1 = queuedEvent.getUpdateRect();
    Rectangle r2 = newEvent.getUpdateRect();
    Rectangle union = r1.union(r2);
    
    int r1a = r1.width * r1.height;
    int r2a = r2.width * r2.height;
    int ua  = union.width * union.height;
    
    if (ua > (r1a+r2a)*2)
      return null;
    /* The 2 factor should maybe be reconsidered. Perhaps 3/2
       would be better? */

    newEvent.setUpdateRect(union);
    return newEvent;
  }

  /**
   * Processes the specified event.  In this class, this method simply
   * calls one of the more specific event handlers.
   * 
   * @param event The event to process.
   */
  protected void processEvent(AWTEvent e)
  {

    /* Note: the order of these if statements are
       important. Subclasses must be checked first. Eg. MouseEvent
       must be checked before ComponentEvent, since a MouseEvent
       object is also an instance of a ComponentEvent. */

    if (e instanceof FocusEvent)
      processFocusEvent((FocusEvent) e);
    else if (e instanceof PaintEvent)
      processPaintEvent((PaintEvent) e);
    else if (e instanceof MouseEvent)
      {
        if (e.id == MouseEvent.MOUSE_MOVED 
	    || e.id == MouseEvent.MOUSE_DRAGGED)
	  processMouseMotionEvent((MouseEvent) e);
	else
	  processMouseEvent((MouseEvent) e);
      }
    else if (e instanceof ComponentEvent)
      processComponentEvent((ComponentEvent) e);
    else if (e instanceof KeyEvent)
      processKeyEvent((KeyEvent) e);
    else if (e instanceof InputMethodEvent)
      processInputMethodEvent((InputMethodEvent) e);
    else if (e instanceof HierarchyEvent)
      {
        if (e.id == HierarchyEvent.HIERARCHY_CHANGED)
	  processHierarchyEvent((HierarchyEvent) e);
	else
	  processHierarchyBoundsEvent((HierarchyEvent) e);
      }
  }

  /**
   * Called when a component event is dispatched and component events are
   * enabled.  This method passes the event along to any listeners
   * that are attached.
   *
   * @param event The <code>ComponentEvent</code> to process.
   */
  protected void processComponentEvent(ComponentEvent e)
  {
    if (componentListener == null)
      return;
    switch (e.id)
      {
        case ComponentEvent.COMPONENT_HIDDEN:
	  componentListener.componentHidden(e);
	break;
		
        case ComponentEvent.COMPONENT_MOVED:
	  componentListener.componentMoved(e);
	break;
	
	case ComponentEvent.COMPONENT_RESIZED:
	  componentListener.componentResized(e);
	break;
	
	case ComponentEvent.COMPONENT_SHOWN:
	  componentListener.componentShown(e);
	break;
      }
  }

  /**
   * Called when a focus event is dispatched and component events are
   * enabled.  This method passes the event along to any listeners
   * that are attached.
   *
   * @param event The <code>FocusEvent</code> to process.
   */
  protected void processFocusEvent(FocusEvent e)
  {
    if (focusListener == null)
      return;
    switch (e.id)
      {
        case FocusEvent.FOCUS_GAINED:
	  focusListener.focusGained(e);
	break;
        case FocusEvent.FOCUS_LOST:
	  focusListener.focusLost(e);
	break;
      }    
  }

  /**
   * Called when a key event is dispatched and component events are
   * enabled.  This method passes the event along to any listeners
   * that are attached.
   *
   * @param event The <code>KeyEvent</code> to process.
   */
  protected void processKeyEvent(KeyEvent e)
  {
    if (keyListener == null)
      return;
    switch (e.id)
      {
	case KeyEvent.KEY_PRESSED:
	  keyListener.keyPressed(e);
	break;
	case KeyEvent.KEY_RELEASED:
	  keyListener.keyReleased(e);
	break;
	case KeyEvent.KEY_TYPED:
	  keyListener.keyTyped(e);
	break;
      }
  }

  /**
   * Called when a regular mouse event is dispatched and component events are
   * enabled.  This method passes the event along to any listeners
   * that are attached.
   *
   * @param event The <code>MouseEvent</code> to process.
   */
  protected void processMouseEvent(MouseEvent e)
  {
    if (mouseListener == null)
      return;
    switch (e.id)
      {
	case MouseEvent.MOUSE_CLICKED:
	  mouseListener.mouseClicked(e);
	break;
        case MouseEvent.MOUSE_ENTERED:
	  mouseListener.mouseEntered(e);
	break;
	case MouseEvent.MOUSE_EXITED:
	  mouseListener.mouseExited(e);
	break;
	case MouseEvent.MOUSE_PRESSED:
	  mouseListener.mousePressed(e);
	break;
	case MouseEvent.MOUSE_RELEASED:
	  mouseListener.mouseReleased(e);
	break;
      }
  }

  /**
   * Called when a mouse motion event is dispatched and component events are
   * enabled.  This method passes the event along to any listeners
   * that are attached.
   *
   * @param event The <code>MouseMotionEvent</code> to process.
   */
  protected void processMouseMotionEvent(MouseEvent e)
  {
    if (mouseMotionListener == null)
      return;
    switch (e.id)
      {
	case MouseEvent.MOUSE_DRAGGED:
	  mouseMotionListener.mouseDragged(e);
	break;
        case MouseEvent.MOUSE_MOVED:
	  mouseMotionListener.mouseMoved(e);
	break;
      }	
  }

  /** @since 1.2 */
  protected void processInputMethodEvent(InputMethodEvent e)
  {
    if (inputMethodListener == null)
      return;
    switch (e.id)
      {
	case InputMethodEvent.CARET_POSITION_CHANGED:
          inputMethodListener.caretPositionChanged(e);
	break;
	case InputMethodEvent.INPUT_METHOD_TEXT_CHANGED:
          inputMethodListener.inputMethodTextChanged(e);
	break;
      }	
  }
  
  /** @since 1.3 */
  protected void processHierarchyEvent(HierarchyEvent e)
  {
    if (hierarchyListener == null)
      return;
    if (e.id == HierarchyEvent.HIERARCHY_CHANGED)
      hierarchyListener.hierarchyChanged(e);
  }
  
  /** @since 1.3 */
  protected void processHierarchyBoundsEvent(HierarchyEvent e)
  {
    if (hierarchyBoundsListener == null)
      return;
    switch (e.id)
      {
        case HierarchyEvent.ANCESTOR_MOVED:
	  hierarchyBoundsListener.ancestorMoved(e);
	break;
	case HierarchyEvent.ANCESTOR_RESIZED:
	  hierarchyBoundsListener.ancestorResized(e);
	break;
      }
  }

  private void processPaintEvent(PaintEvent event)
  {
    // Can't do graphics without peer
    if (peer == null)
      return;

    Graphics gfx = getGraphics();
    Shape clip = event.getUpdateRect();
    gfx.setClip(clip);

    switch (event.id)
      {
      case PaintEvent.PAINT:
	paint(gfx);
	break;
      case PaintEvent.UPDATE:
	update(gfx);
	break;
      default:
	throw new IllegalArgumentException("unknown paint event");
      }
  }

  /**
   * AWT 1.0 event processor.
   *
   * @deprecated Deprecated in favor of <code>processEvent</code>.
   */
  public boolean handleEvent(Event evt)
  {
    return false;
  }

  /**
   * AWT 1.0 mouse event.
   *
   * @deprecated Deprecated in favor of <code>processMouseEvent()</code>.
   */
  public boolean mouseDown(Event evt, int x, int y)
  {
    return false;
  }
  
  /**
   * AWT 1.0 mouse event.
   *
   * @deprecated Deprecated in favor of <code>processMouseMotionEvent()</code>.
   */
  public boolean mouseDrag(Event evt, int x, int y)
  {
    return false;
  }

  /**
   * AWT 1.0 mouse event.
   *
   * @deprecated Deprecated in favor of <code>processMouseEvent()</code>.
   */
  public boolean mouseUp(Event evt, int x, int y)
  {
    return false;
  }

  /**
   * AWT 1.0 mouse event.
   *
   * @deprecated Deprecated in favor of <code>processMouseMotionEvent()</code>.
   */
  public boolean mouseMove(Event evt, int x, int y)
  {
    return false;
  }

  /**
   * AWT 1.0 mouse event.
   *
   * @deprecated Deprecated in favor of <code>processMouseEvent()</code>.
   */
  public boolean mouseEnter(Event evt, int x, int y)
  {
    return false;
  }

  /**
   * AWT 1.0 mouse event.
   *
   * @deprecated Deprecated in favor of <code>processMouseEvent()</code>.
   */
  public boolean mouseExit(Event evt, int x, int y)
  {
    return false;
  }

  /**
   * AWT 1.0 key press event.
   *
   * @deprecated Deprecated in favor of <code>processKeyEvent</code>.
   */
  public boolean keyDown(Event evt, int key)
  {
    return false;
  }

  /**
   * AWT 1.0 key press event.
   *
   * @deprecated Deprecated in favor of <code>processKeyEvent</code>.
   */
  public boolean keyUp(Event evt, int key)
  {
    return false;
  }

  /**
   * AWT 1.0 action event processor.
   *
   * @deprecated Deprecated in favor of the <code>ActionListener</code>
   * interface.
   */
  public boolean action(Event evt, Object what)
  {
    return false;
  }

  /**
   * Called to inform this component it has been added to a container.
   * A native peer - if any - is created at this time.  This method is
   * called automatically by the AWT system and should not be called by
   * user level code.
   */
  public void addNotify()
  {
    if (peer == null)
      peer = getToolkit().createComponent(this);

    /* Now that all the children has gotten their peers, we should
       have the event mask needed for this component and its
       lightweight subcomponents. */

    peer.setEventMask(eventMask);

    /* We do not invalidate here, but rather leave that job up to
       the peer. For efficiency, the peer can choose not to
       invalidate if it is happy with the current dimensions,
       etc. */
  }

  /**
   * Called to inform this component is has been removed from its
   * container.  Its native peer - if any - is destroyed at this time.
   * This method is called automatically by the AWT system and should
   * not be called by user level code.
   */
  public void removeNotify()
  {    
    if (peer != null)
      peer.dispose();
    peer = null;
  }
  
  /** @deprecated */
  public boolean gotFocus(Event evt, Object what)
  {
    return false;
  }
  
  /** @deprecated */
  public boolean lostFocus(Event evt, Object what)
  {
    return false;
  }

  /**
   * Tests whether or not this component is in the group that can
   * be traversed using the keyboard traversal mechanism (such as the TAB
   * key).
   *
   * @return <code>true</code> if the component is traversed via the TAB
   * key, <code>false</code> otherwise.
   */
  public boolean isFocusTraversable()
  {
    return enabled && visible && (peer == null || peer.isFocusTraversable ());
  }

  /**
   * Requests that this component be given focus.  The <code>gotFocus()</code>
   * method on this event will be called when and if this request was
   * successful.
   */
  public void requestFocus()
  {
    // If there's no peer then this component can't get the focus.  We
    // treat it as a silent rejection of the request.
    if (peer != null)
      peer.requestFocus ();
  }

  // This method is used to implement transferFocus().
  // CHILD is the child making the request.
  // This is overridden by Container; when called for an ordinary
  // component there is no child and so we always return null.
  Component findNextFocusComponent (Component child)
  {
    return null;
  }

  /**
   * Transfers focus to the next component in the focus traversal order.
   */
  public void transferFocus()
  {
    Component next;
    if (parent == null)
      next = findNextFocusComponent (null);
    else
      next = parent.findNextFocusComponent (this);
    if (next != null && next != this)
      next.requestFocus ();
  }

  /**
   * AWT 1.0 focus event processor.
   *
   * @deprecated Deprecated in favor of <code>transferFocus()</code>.
   */
  public void nextFocus()
  {
    transferFocus();
  }

  /** @since 1.2 */
  public boolean hasFocus()
  {
    return hasFocus;
  }

  /**
   * Adds the specified popup menu to this component.
   *
   * @param menu The popup menu to be added.
   */
  public synchronized void add(PopupMenu popup)
  {
    if (popups == null)
      popups = new Vector();
    popups.addElement(popup);    
  }

  /**
   * Removes the specified popup menu from this component.
   *
   * @param menu The popup menu to remove.
   */
  public synchronized void remove(MenuComponent popup)
  {
    popups.removeElement(popup);
  }

  /**
   * Returns a debugging string representing this component.
   *
   * @return A string representing this component.
   */
  protected String paramString()
  {
    StringBuffer param = new StringBuffer();
    String name = getName();
    if (name != null)
      {
	param.append(name);
	param.append(",");
      }
    param.append(width);
    param.append("x");
    param.append(height);
    param.append("+");
    param.append(x);
    param.append("+");
    param.append(y);
    
    if (!isValid())
      param.append(",invalid");
    if (!isVisible())
      param.append(",invisible");
    if (!isEnabled())
      param.append(",disabled");
    if (!isOpaque())
      param.append(",translucent");
    if (isDoubleBuffered())
      param.append(",doublebuffered");
    
    return param.toString();
  }

  /**
   * Returns a string representation of this component.
   *
   * @return A string representation of this component
   */
  public String toString()
  {
    return this.getClass().getName() + "[" + paramString() + "]";
  }

  /**
   * Prints a listing of this component to the standard output.
   */
  public void list ()
  {
    list (System.out, 0);
  }

  /**
   * Prints a listing of this component to the specified print stream.
   *
   * @param stream The <code>PrintStream</code> to print to.
   */
  public void list (PrintStream out)
  {
    list (out, 0);
  }

  /**
   * Prints a listing of this component to the specified print stream,
   * starting at the specified indentation point.
   *
   * @param stream The <code>PrintStream</code> to print to.
   * @param indent The indentation point.
   */
  public void list (PrintStream out, int indent)
  {
    for (int i = 0; i < indent; ++i)
      out.print (' ');
    out.println (toString ());
  }

  /**
   * Prints a listing of this component to the specified print writer.
   *
   * @param writer The <code>PrintWrinter</code> to print to.
   */
  public void list (PrintWriter out)
  {
    list (out, 0);
  }

  /**
   * Prints a listing of this component to the specified print writer,
   * starting at the specified indentation point.
   *
   * @param writer The <code>PrintWriter</code> to print to.
   * @param indent The indentation point.
   */
  public void list (PrintWriter out, int indent)
  {
    for (int i = 0; i < indent; ++i)
      out.print (' ');
    out.println (toString ());
  }

  public void addPropertyChangeListener(PropertyChangeListener listener)
  {
    if (changeSupport == null)
      changeSupport = new PropertyChangeSupport(this);
    changeSupport.addPropertyChangeListener(listener);
  }

  public void removePropertyChangeListener(PropertyChangeListener listener)
  {
    if (changeSupport != null)
      changeSupport.removePropertyChangeListener(listener);         
  }

  public void addPropertyChangeListener(String propertyName,
                                	PropertyChangeListener listener)
  {
    if (changeSupport == null)
      changeSupport = new PropertyChangeSupport(this);
    changeSupport.addPropertyChangeListener(propertyName, listener);  
  }

  public void removePropertyChangeListener(String propertyName,
                                           PropertyChangeListener listener)
  {
    if (changeSupport != null)
      changeSupport.removePropertyChangeListener(propertyName, listener);
  }

  protected void firePropertyChange(String propertyName, Object oldValue, 
                                    Object newValue)
  {
    if (changeSupport != null)
      changeSupport.firePropertyChange(propertyName, oldValue, newValue);    
  }

  public void setComponentOrientation(ComponentOrientation o)
  {
    orientation = o;
  }

  public ComponentOrientation getComponentOrientation()
  {
    return orientation;
  }

  /*
  public AccessibleContext getAccessibleContext()
  {
    return accessibleContext;
  }
  */

/**
  * AWT 1.0 focus event processor.
  *
  * @deprecated Deprecated in favor of <code>processFocusEvent</code>.
  
public boolean
gotFocus(Event event, Object what)
{
  return(true);
}
*/

/**
  * AWT 1.0 focus event processor.
  *
  * @deprecated Deprecated in favor of <code>processFocusEvent</code>.
  
public boolean
lostFocus(Event event, Object what)
{
  return(true);
}
*/

}