basictoolbarui.java

gcc的组建

     * @param t The JToolBar this DockingListener is being used for.
     */
    public DockingListener(JToolBar t)
    {
      toolBar = t;
    }

    /**
     * This method is called when the mouse is clicked.
     *
     * @param e The MouseEvent.
     */
    public void mouseClicked(MouseEvent e)
    {
      // Don't care.
    }

    /**
     * This method is called when the mouse is dragged. It delegates the drag
     * painting to the dragTo method.
     *
     * @param e The MouseEvent.
     */
    public void mouseDragged(MouseEvent e)
    {
      if (isDragging)
	dragTo(e.getPoint(), origin);
    }

    /**
     * This method is called when the mouse enters the JToolBar.
     *
     * @param e The MouseEvent.
     */
    public void mouseEntered(MouseEvent e)
    {
      // Don't care (yet).
    }

    /**
     * This method is called when the mouse exits the JToolBar.
     *
     * @param e The MouseEvent.
     */
    public void mouseExited(MouseEvent e)
    {
      // Don't care (yet).
    }

    /**
     * This method is called when the mouse is moved in the JToolBar.
     *
     * @param e The MouseEvent.
     */
    public void mouseMoved(MouseEvent e)
    {
      // TODO: What should be done here, if anything?
    }

    /**
     * This method is called when the mouse is pressed in the JToolBar. If the
     * press doesn't occur in a place where it causes the JToolBar to be
     * dragged, it returns. Otherwise, it starts a drag session.
     *
     * @param e The MouseEvent.
     */
    public void mousePressed(MouseEvent e)
    {
      if (! toolBar.isFloatable())
	return;

      Point ssd = e.getPoint();
      Insets insets = toolBar.getInsets();

      // Verify that this click occurs in the top inset.
      if (toolBar.getOrientation() == SwingConstants.HORIZONTAL)
        {
	  if (e.getX() > insets.left)
	    return;
        }
      else
        {
	  if (e.getY() > insets.top)
	    return;
        }

      origin = new Point(0, 0);
      if (toolBar.isShowing())
        SwingUtilities.convertPointToScreen(ssd, toolBar);

      if (! (SwingUtilities.getAncestorOfClass(Window.class, toolBar) instanceof UIResource))
	// Need to know who keeps the toolBar if it gets dragged back into it.
	origParent = toolBar.getParent();
      
      if (toolBar.isShowing())
        SwingUtilities.convertPointToScreen(origin, toolBar);

      isDragging = true;

      if (dragWindow != null)
	dragWindow.setOffset(new Point(e.getX(), e.getY()));

      dragTo(e.getPoint(), origin);
    }

    /**
     * This method is called when the mouse is released from the JToolBar.
     *
     * @param e The MouseEvent.
     */
    public void mouseReleased(MouseEvent e)
    {
      if (! isDragging || ! toolBar.isFloatable())
	return;

      isDragging = false;
      floatAt(e.getPoint(), origin);
      dragWindow.hide();
    }
  }

  /**
   * This is the window that appears when the JToolBar is being dragged
   * around.
   */
  protected class DragWindow extends Window
  {
    /**
     * The current border color. It changes depending on whether the JToolBar
     * is over a place that allows it to dock.
     */
    private Color borderColor;

    /** The between the mouse and the top left corner of the window. */
    private Point offset;

    /**
     * Creates a new DragWindow object.
     * This is package-private to avoid an accessor method.
     */
    DragWindow()
    {
      super(owner);
    }

    /**
     * The color that the border should be.
     *
     * @return The border color.
     */
    public Color getBorderColor()
    {
      if (borderColor == null)
	return Color.BLACK;

      return borderColor;
    }

    /**
     * This method returns the insets for the DragWindow.
     *
     * @return The insets for the DragWindow.
     */
    public Insets getInsets()
    {
      // This window has no decorations, so insets are empty.
      return new Insets(0, 0, 0, 0);
    }

    /**
     * This method returns the mouse offset from the top left corner of the
     * DragWindow.
     *
     * @return The mouse offset.
     */
    public Point getOffset()
    {
      return offset;
    }

    /**
     * This method paints the DragWindow.
     *
     * @param g The Graphics object to paint with.
     */
    public void paint(Graphics g)
    {
      //  No visiting children necessary.
      Color saved = g.getColor();
      Rectangle b = getBounds();

      g.setColor(getBorderColor());
      g.drawRect(0, 0, b.width - 1, b.height - 1);

      g.setColor(saved);
    }

    /**
     * This method changes the border color.
     *
     * @param c The new border color.
     */
    public void setBorderColor(Color c)
    {
      borderColor = c;
    }

    /**
     * This method changes the mouse offset.
     *
     * @param p The new mouse offset.
     */
    public void setOffset(Point p)
    {
      offset = p;
    }

    /**
     * FIXME: Do something.
     *
     * @param o DOCUMENT ME!
     */
    public void setOrientation(int o)
    {
      // FIXME: implement.
    }
  }

  /**
   * This helper class listens for Window events from the floatable window and
   * if it is closed, returns the JToolBar to the last known good location.
   */
  protected class FrameListener extends WindowAdapter
  {
    /**
     * This method is called when the floating window is closed.
     *
     * @param e The WindowEvent.
     */
    public void windowClosing(WindowEvent e)
    {
      Container parent = toolBar.getParent();
      parent.remove(toolBar);

      if (origParent != null)
        {
	  origParent.add(toolBar,
	                 (constraintBeforeFloating != null)
	                 ? constraintBeforeFloating : BorderLayout.NORTH);
	  toolBar.setOrientation(lastGoodOrientation);
        }

      origParent.invalidate();
      origParent.validate();
      origParent.repaint();
    }
  }

  /**
   * This helper class listens for PropertyChangeEvents from the JToolBar.
   */
  protected class PropertyListener implements PropertyChangeListener
  {
    /**
     * This method is called when a property from the JToolBar is changed.
     *
     * @param e The PropertyChangeEvent.
     */
    public void propertyChange(PropertyChangeEvent e)
    {
      // FIXME: need name properties so can change floatFrame title.
      if (e.getPropertyName().equals("rollover"))
	setRolloverBorders(toolBar.isRollover());
    }
  }

  /**
   * This helper class listens for components added to and removed from the
   * JToolBar.
   */
  protected class ToolBarContListener implements ContainerListener
  {
    /**
     * This method is responsible for setting rollover or non rollover for new
     * buttons added to the JToolBar.
     *
     * @param e The ContainerEvent.
     */
    public void componentAdded(ContainerEvent e)
    {
      if (e.getChild() instanceof JButton)
        {
	  JButton b = (JButton) e.getChild();

	  if (b.getBorder() != null)
	    borders.put(b, b.getBorder());
        }

      if (isRolloverBorders())
	setBorderToRollover(e.getChild());
      else
	setBorderToNonRollover(e.getChild());

      cachedBounds = toolBar.getPreferredSize();
      cachedOrientation = toolBar.getOrientation();
    }

    /**
     * This method is responsible for giving the child components their
     * original borders when they are removed.
     *
     * @param e The ContainerEvent.
     */
    public void componentRemoved(ContainerEvent e)
    {
      setBorderToNormal(e.getChild());
      cachedBounds = toolBar.getPreferredSize();
      cachedOrientation = toolBar.getOrientation();
    }
  }

  /**
   * This is the floating window that is returned when getFloatingWindow is
   * called.
   */
  private class ToolBarDialog extends JDialog implements UIResource
  {
    /**
     * Creates a new ToolBarDialog object with the name given by the JToolBar.
     */
    public ToolBarDialog()
    {
      super();
      setName((toolBar.getName() != null) ? toolBar.getName() : "");
    }
  }

  /**
   * DOCUMENT ME!
   */
  protected class ToolBarFocusListener implements FocusListener
  {
    /**
     * Creates a new ToolBarFocusListener object.
     */
    protected ToolBarFocusListener()
    {
      // FIXME: implement.
    }

    /**
     * DOCUMENT ME!
     *
     * @param e DOCUMENT ME!
     */
    public void focusGained(FocusEvent e)
    {
      // FIXME: implement.
    }

    /**
     * DOCUMENT ME!
     *
     * @param e DOCUMENT ME!
     */
    public void focusLost(FocusEvent e)
    {
      // FIXME: implement.
    }
  }

  /**
   * This helper class acts as the border for the JToolBar.
   */
  private static class ToolBarBorder implements Border
  {
    /** The size of the larger, draggable side of the border. */
    private static final int offset = 10;

    /** The other sides. */
    private static final int regular = 2;

    /**
     * This method returns the border insets for the JToolBar.
     *
     * @param c The Component to find insets for.
     *
     * @return The border insets.
     */
    public Insets getBorderInsets(Component c)
    {
      if (c instanceof JToolBar)
        {
	  JToolBar tb = (JToolBar) c;
	  int orientation = tb.getOrientation();

	  if (! tb.isFloatable())
	    return new Insets(regular, regular, regular, regular);
	  else if (orientation == SwingConstants.HORIZONTAL)
	    return new Insets(regular, offset, regular, regular);
	  else
	    return new Insets(offset, regular, regular, regular);
        }

      return new Insets(0, 0, 0, 0);
    }

    /**
     * This method returns whether the border is opaque.
     *
     * @return Whether the border is opaque.
     */
    public boolean isBorderOpaque()
    {
      return false;
    }

    /**
     * This method paints the ribbed area of the border.
     *
     * @param g The Graphics object to paint with.
     * @param x The x coordinate of the area.
     * @param y The y coordinate of the area.
     * @param w The width of the area.
     * @param h The height of the area.
     * @param size The size of the bump.
     * @param c The color of the bumps.
     */
    private void paintBumps(Graphics g, int x, int y, int w, int h, int size,
                            Color c)
    {
      Color saved = g.getColor();
      g.setColor(c);

      int hgap = 2 * size;
      int vgap = 4 * size;
      int count = 0;

      for (int i = x; i < (w + x); i += hgap)
	for (int j = ((count++ % 2) == 0) ? y : (y + (2 * size)); j < (h + y);
	     j += vgap)
	  g.fillRect(i, j, size, size);

      g.setColor(saved);
    }

    /**
     * This method paints the border around the given Component.
     *
     * @param c The Component whose border is being painted.
     * @param g The Graphics object to paint with.
     * @param x The x coordinate of the component.
     * @param y The y coordinate of the component.
     * @param width The width of the component.
     * @param height The height of the component.
     */
    public void paintBorder(Component c, Graphics g, int x, int y, int width,
                            int height)
    {
      if (c instanceof JToolBar)
        {
	  JToolBar tb = (JToolBar) c;

	  int orientation = tb.getOrientation();

	  if (orientation == SwingConstants.HORIZONTAL)
	    {
	      paintBumps(g, x, y, offset, height, 1, Color.WHITE);
	      paintBumps(g, x + 1, y + 1, offset - 1, height - 1, 1, Color.GRAY);
	    }
	  else
	    {
	      paintBumps(g, x, y, width, offset, 1, Color.WHITE);
	      paintBumps(g, x + 1, y + 1, width - 1, offset - 1, 1, Color.GRAY);
	    }
        }
    }
  }
}