frame.java

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· Java 代码 · 共 649 行 · 第 1/2 页

  {
    if (this.menuBar != null)
      this.menuBar.removeNotify();  
    if (menuBar != null)
      menuBar.addNotify();
    invalidateTree ();
    ((FramePeer) peer).setMenuBar(menuBar);
  }
  this.menuBar = menuBar;
}

/**
  * Tests whether or not this frame is resizable.  This will be 
  * <code>true</code> by default.
  *
  * @return <code>true</code> if this frame is resizable, <code>false</code>
  * otherwise.
  */
public boolean
isResizable()
{
  return(resizable);
}

/**
  * Sets the resizability of this frame to the specified value.
  *
  * @param resizable <code>true</code> to make the frame resizable,
  * <code>false</code> to make it non-resizable.
  */
public synchronized void
setResizable(boolean resizable)
{
  this.resizable = resizable;
  if (peer != null)
    ((FramePeer) peer).setResizable(resizable);
}

/**
  * Returns the cursor type of the cursor for this window.  This will
  * be one of the constants in this class.
  *
  * @return The cursor type for this frame.
  *
  * @deprecated Use <code>Component.getCursor()</code> instead.
  */
public int
getCursorType()
{
  return(getCursor().getType());
}

/**
  * Sets the cursor for this window to the specified type.  The specified
  * type should be one of the constants in this class.
  *
  * @param type The cursor type.
  *
  * @deprecated Use <code>Component.setCursor(Cursor)</code> instead.
  */
public void
setCursor(int type)
{
  setCursor(new Cursor(type));
}

/**
  * Removes the specified component from this frame's menu.
  *
  * @param menu The menu component to remove.
  */
public void
remove(MenuComponent menu)
{
  menuBar.remove(menu);
}

/**
  * Notifies this frame that it should create its native peer.
  */
private static void fireDummyEvent()
{
  EventQueue.invokeLater(new Runnable()
    {
      public void run()
      {
	// Do nothing here.
      }
    });
}

public void
addNotify()
{
  if (menuBar != null)
    menuBar.addNotify();
  if (peer == null)
    peer = getToolkit ().createFrame (this);

  // We now know there's a Frame (us) with a live peer, so we can start the
  // fundamental queue and dispatch thread, by inserting a dummy event.
  if (parent != null && parent.isDisplayable())
    fireDummyEvent();
  
  super.addNotify();
}

public void removeNotify()
{
  if (menuBar != null)
    menuBar.removeNotify();
  super.removeNotify();

  // By now we've been disconnected from the peer, and the peer set to
  // null.  This is formally the same as saying "we just became
  // un-displayable", so we wake up the event queue with a dummy event to
  // see if it's time to shut down.
  fireDummyEvent();
}

  /**
   * Returns a debugging string describing this window.
   *
   * @return A debugging string describing this window.
   */
  protected String paramString ()
  {
    String title = getTitle ();

    String resizable = "";
    if (isResizable ())
      resizable = ",resizable";

    String state = "";
    switch (getState ())
      {
      case NORMAL:
        state = ",normal";
        break;
      case ICONIFIED:
        state = ",iconified";
        break;
      case MAXIMIZED_BOTH:
        state = ",maximized-both";
        break;
      case MAXIMIZED_HORIZ:
        state = ",maximized-horiz";
        break;
      case MAXIMIZED_VERT:
        state = ",maximized-vert";
        break;
      }

    return super.paramString () + ",title=" + title + resizable + state;
  }

private static ArrayList weakFrames = new ArrayList();

private static void noteFrame(Frame f)
{
  weakFrames.add(new WeakReference(f));
}

public static Frame[] getFrames()
{
  int n = 0;
  synchronized (weakFrames)
    {
      Iterator i = weakFrames.iterator();
      while (i.hasNext())
        {
          WeakReference wr = (WeakReference) i.next();
          if (wr.get() != null)
            ++n;
        }
      if (n == 0)
        return new Frame[0];
      else
        {
          Frame[] frames = new Frame[n];
          n = 0;
          i = weakFrames.iterator();
          while (i.hasNext())
            {
              WeakReference wr = (WeakReference) i.next();
              if (wr.get() != null)
                frames[n++] = (Frame) wr.get();
            }
          return frames;
        }
    }
}

  public void setState (int state)
  {
    int current_state = getExtendedState ();

    if (state == NORMAL
        && (current_state & ICONIFIED) != 0)
      setExtendedState (current_state | ICONIFIED);
    
    if (state == ICONIFIED
        && (current_state & ~ICONIFIED) == 0)
      setExtendedState (current_state & ~ICONIFIED);
  }

  public int getState ()
  {
    /* FIXME: State might have changed in the peer... Must check. */
  
    return (state & ICONIFIED) != 0 ? ICONIFIED : NORMAL;
  }

  /**
   * @since 1.4
   */
  public void setExtendedState (int state)
  {
    this.state = state;
  }

  /**
   * @since 1.4
   */
  public int getExtendedState ()
  {
    return state;
  }

  /**
   * @since 1.4
   */
  public void setMaximizedBounds (Rectangle maximizedBounds)
  {
    this.maximizedBounds = maximizedBounds;
  }

  /**
   * Returns the maximized bounds of this frame.
   *
   * @return the maximized rectangle, may be null.
   *
   * @since 1.4
   */
  public Rectangle getMaximizedBounds ()
  {
    return maximizedBounds;
  }

  /**
   * Returns whether this frame is undecorated or not.
   * 
   * @since 1.4
   */
  public boolean isUndecorated ()
  {
    return undecorated;
  }

  /**
   * Disables or enables decorations for this frame. This method can only be
   * called while the frame is not displayable.
   * 
   * @exception IllegalComponentStateException If this frame is displayable.
   * 
   * @since 1.4
   */
  public void setUndecorated (boolean undecorated)
  {
    if (!isDisplayable ())
      throw new IllegalComponentStateException ();

    this.undecorated = undecorated;
  }

  /**
   * Generate a unique name for this frame.
   *
   * @return A unique name for this frame.
   */
  String generateName ()
  {
    return "frame" + getUniqueLong ();
  }

  private static synchronized long getUniqueLong ()
  {
    return next_frame_number++;
  }
  
  protected class AccessibleAWTFrame extends AccessibleAWTWindow
  {
    public AccessibleRole getAccessibleRole()
    {
      return AccessibleRole.FRAME;
    }
    
    public AccessibleStateSet getAccessibleState()
    {
      AccessibleStateSet states = super.getAccessibleStateSet();
      if (isResizable())
        states.add(AccessibleState.RESIZABLE);
      if ((state & ICONIFIED) != 0)
        states.add(AccessibleState.ICONIFIED);
      return states;
    }
  }
  
  /**
   * Gets the AccessibleContext associated with this <code>Frame</code>.
   * The context is created, if necessary.
   *
   * @return the associated context
   */
  public AccessibleContext getAccessibleContext()
  {
    /* Create the context if this is the first request */
    if (accessibleContext == null)
      accessibleContext = new AccessibleAWTFrame();
    return accessibleContext;
  }

}