window.java

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  {
    this.windowFocusOwner = windowFocusOwner;
  }

  /**
   * Post a Java 1.0 event to the event queue.
   *
   * @param e The event to post.
   *
   * @deprecated
   */
  public boolean postEvent(Event e)
  {
    return handleEvent (e);
  }

  /**
   * Tests whether or not this window is visible on the screen.
   *
   * In contrast to the normal behaviour of Container, which is that
   * a container is showing if its parent is visible and showing, a Window
   * is even showing, if its parent (i.e. an invisible Frame) is not showing.
   *
   * @return <code>true</code> if this window is visible, <code>false</code>
   * otherwise.
   */
  public boolean isShowing()
  {
    return isVisible();
  }

  public void setLocationRelativeTo(Component c)
  {
    int x = 0;
    int y = 0;
    
    if (c == null || !c.isShowing())
      {
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        Point center = ge.getCenterPoint();
        x = center.x - (width / 2);
        y = center.y - (height / 2);
      }
    else
      {
        int cWidth = c.getWidth();
        int cHeight = c.getHeight();
        Dimension screenSize = getToolkit().getScreenSize();

        x = c.getLocationOnScreen().x;
        y = c.getLocationOnScreen().y;
        
        // If bottom of component is cut off, window placed
        // on the left or the right side of component
        if ((y + cHeight) > screenSize.height)
          {
            // If the right side of the component is closer to the center
            if ((screenSize.width / 2 - x) <= 0)
              {
                if ((x - width) >= 0)
                  x -= width;
                else
                  x = 0;
              }
            else
              {
                if ((x + cWidth + width) <= screenSize.width)
                  x += cWidth;
                else
                  x = screenSize.width - width;
              }

            y = screenSize.height - height;
          }
        else if (cWidth > width || cHeight > height)
          {
            // If right side of component is cut off
            if ((x + width) > screenSize.width)
              x = screenSize.width - width;
            // If left side of component is cut off
            else if (x < 0)
              x = 0;
            else
              x += (cWidth - width) / 2;
            
            y += (cHeight - height) / 2;
          }
        else
          {
            // If right side of component is cut off
            if ((x + width) > screenSize.width)
              x = screenSize.width - width;
            // If left side of component is cut off
            else if (x < 0 || (x - (width - cWidth) / 2) < 0)
              x = 0;
            else
              x -= (width - cWidth) / 2;

            if ((y - (height - cHeight) / 2) > 0)
              y -= (height - cHeight) / 2;
            else
              y = 0;
          }
      }

    setLocation(x, y);
  }

  /**
   * A BltBufferStrategy for windows.
   */
  private class WindowBltBufferStrategy extends BltBufferStrategy
  {
    /**
     * Creates a block transfer strategy for this window.
     *
     * @param numBuffers the number of buffers in this strategy
     * @param accelerated true if the buffer should be accelerated,
     * false otherwise
     */
    WindowBltBufferStrategy(int numBuffers, boolean accelerated)
    {
      super(numBuffers,
	    new BufferCapabilities(new ImageCapabilities(accelerated),
				   new ImageCapabilities(accelerated),
				   BufferCapabilities.FlipContents.COPIED));
    }
  }

  /**
   * A FlipBufferStrategy for windows.
   */
  private class WindowFlipBufferStrategy extends FlipBufferStrategy
  {
    /**
     * Creates a flip buffer strategy for this window.
     *
     * @param numBuffers the number of buffers in this strategy
     *
     * @throws AWTException if the requested number of buffers is not
     * supported
     */
    WindowFlipBufferStrategy(int numBuffers)
      throws AWTException
    {
      super(numBuffers,
	    new BufferCapabilities(new ImageCapabilities(true),
				   new ImageCapabilities(true),
				   BufferCapabilities.FlipContents.COPIED));
    }
  }

  /**
   * Creates a buffering strategy that manages how this window is
   * repainted.  This method attempts to create the optimum strategy
   * based on the desired number of buffers.  Hardware or software
   * acceleration may be used.
   *
   * createBufferStrategy attempts different levels of optimization,
   * but guarantees that some strategy with the requested number of
   * buffers will be created even if it is not optimal.  First it
   * attempts to create a page flipping strategy, then an accelerated
   * blitting strategy, then an unaccelerated blitting strategy.
   *
   * Calling this method causes any existing buffer strategy to be
   * destroyed.
   *
   * @param numBuffers the number of buffers in this strategy
   *
   * @throws IllegalArgumentException if requested number of buffers
   * is less than one
   * @throws IllegalStateException if this window is not displayable
   *
   * @since 1.4
   */
  public void createBufferStrategy(int numBuffers)
  {
    if (numBuffers < 1)
      throw new IllegalArgumentException("Window.createBufferStrategy: number"
					 + " of buffers is less than one");

    if (!isDisplayable())
      throw new IllegalStateException("Window.createBufferStrategy: window is"
				      + " not displayable");

    BufferStrategy newStrategy = null;

    // try a flipping strategy
    try
      {
	newStrategy = new WindowFlipBufferStrategy(numBuffers);
      }
    catch (AWTException e)
      {
      }

    // fall back to an accelerated blitting strategy
    if (newStrategy == null)
      newStrategy = new WindowBltBufferStrategy(numBuffers, true);

    bufferStrategy = newStrategy;
  }

  /**
   * Creates a buffering strategy that manages how this window is
   * repainted.  This method attempts to create a strategy based on
   * the specified capabilities and throws an exception if the
   * requested strategy is not supported.
   *
   * Calling this method causes any existing buffer strategy to be
   * destroyed.
   *
   * @param numBuffers the number of buffers in this strategy
   * @param caps the requested buffering capabilities
   *
   * @throws AWTException if the requested capabilities are not
   * supported
   * @throws IllegalArgumentException if requested number of buffers
   * is less than one or if caps is null
   *
   * @since 1.4
   */
  public void createBufferStrategy(int numBuffers, BufferCapabilities caps)
    throws AWTException
  {
    if (numBuffers < 1)
      throw new IllegalArgumentException("Window.createBufferStrategy: number"
					 + " of buffers is less than one");

    if (caps == null)
      throw new IllegalArgumentException("Window.createBufferStrategy:"
					 + " capabilities object is null");

    // a flipping strategy was requested
    if (caps.isPageFlipping())
      bufferStrategy = new WindowFlipBufferStrategy(numBuffers);
    else
      bufferStrategy = new WindowBltBufferStrategy(numBuffers, true);
  }

  /**
   * Returns the buffer strategy used by the window.
   *
   * @return the buffer strategy.
   * @since 1.4
   */
  public BufferStrategy getBufferStrategy()
  {
    return bufferStrategy;
  }

  /**
   * @since 1.2
   *
   * @deprecated
   */
  public void applyResourceBundle(ResourceBundle rb)
  {
    throw new Error ("Not implemented");
  }

  /**
   * @since 1.2
   *
   * @deprecated
   */
  public void applyResourceBundle(String rbName)
  {
    ResourceBundle rb = ResourceBundle.getBundle(rbName, Locale.getDefault(),
      ClassLoader.getSystemClassLoader());
    if (rb != null)
      applyResourceBundle(rb);    
  }

  /**
   * Gets the AccessibleContext associated with this <code>Window</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 AccessibleAWTWindow();
    return accessibleContext;
  }

  /** 
   * Get graphics configuration.  The implementation for Window will
   * not ask any parent containers, since Window is a toplevel
   * window and not actually embedded in the parent component.
   */
  public GraphicsConfiguration getGraphicsConfiguration()
  {
    if (graphicsConfiguration != null) return graphicsConfiguration;
    if (peer != null) return peer.getGraphicsConfiguration();
    return null;
  }

  protected void processWindowFocusEvent(WindowEvent event)
  {
    if (windowFocusListener != null)
      {
        switch (event.getID ())
          {
          case WindowEvent.WINDOW_GAINED_FOCUS:
            windowFocusListener.windowGainedFocus (event);
            break;
            
          case WindowEvent.WINDOW_LOST_FOCUS:
            windowFocusListener.windowLostFocus (event);
            break;
            
          default:
            break;
          }
      }
  }
  
  /**
   * @since 1.4
   */
  protected void processWindowStateEvent(WindowEvent event)
  {
    if (windowStateListener != null
        && event.getID () == WindowEvent.WINDOW_STATE_CHANGED)
      windowStateListener.windowStateChanged (event);
  }

  /**
   * Returns whether this <code>Window</code> can get the focus or not.
   *
   * @since 1.4
   */
  public final boolean isFocusableWindow ()
  {
    if (getFocusableWindowState () == false)
      return false;

    if (this instanceof Dialog
        || this instanceof Frame)
      return true;

    // FIXME: Implement more possible cases for returning true.

    return false;
  }
  
  /**
   * Returns the value of the focusableWindowState property.
   * 
   * @since 1.4
   */
  public boolean getFocusableWindowState ()
  {
    return focusableWindowState;
  }

  /**
   * Sets the value of the focusableWindowState property.
   * 
   * @since 1.4
   */
  public void setFocusableWindowState (boolean focusableWindowState)
  {
    this.focusableWindowState = focusableWindowState;
  }

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

  private static synchronized long getUniqueLong()
  {
    return next_window_number++;
  }
}