basicinternalframeui.java

来自「linux下建立JAVA虚拟机的源码KAFFE」· Java 代码 · 共 1,697 行 · 第 1/4 页

            {
              MouseEvent newEvt = SwingUtilities.convertMouseEvent(
                                                                   frame.getGlassPane(),
                                                                   me,
                                                                   mouseEventTarget);
              mouseEventTarget.dispatchEvent(newEvt);

              switch (e.getID())
                {
                case MouseEvent.MOUSE_PRESSED:
                  if (pressCount++ == 0)
                    pressedComponent = mouseEventTarget;
                  break;
                case MouseEvent.MOUSE_RELEASED:
                  // Clear our memory of the original PRESSED event, only if
                  // we're not expecting a CLICKED event after this. If
                  // there is a CLICKED event after this, it will do clean up.
                  if (--pressCount == 0 && mouseEventTarget != pressedComponent)
                    pressedComponent = null;
                  break;
                }
            }
        }
    }
  }

  /**
   * This helper class listens for PropertyChangeEvents from the
   * JInternalFrame.
   */
  public class InternalFramePropertyChangeListener
    implements PropertyChangeListener
  {

    /**
     * This method is called when one of the JInternalFrame's properties change.
     * 
     * @param evt
     *          The PropertyChangeEvent.
     */
    public void propertyChange(PropertyChangeEvent evt)
    {
      if (evt.getPropertyName().equals(JInternalFrame.IS_MAXIMUM_PROPERTY))
        {
          if (frame.isMaximum())
            maximizeFrame(frame);
          else
            minimizeFrame(frame);
        }
      else if (evt.getPropertyName().equals(JInternalFrame.IS_ICON_PROPERTY))
        {
          if (frame.isIcon())
            iconifyFrame(frame);
          else
            deiconifyFrame(frame);
        }
      else if (evt.getPropertyName().equals(JInternalFrame.IS_SELECTED_PROPERTY))
        {
          if (frame.isSelected())
            activateFrame(frame);
          else
            deactivateFrame(frame);
        }
      else if (evt.getPropertyName().equals(JInternalFrame.ROOT_PANE_PROPERTY)
               || evt.getPropertyName().equals(
                                               JInternalFrame.GLASS_PANE_PROPERTY))
        {
          Component old = (Component) evt.getOldValue();
          old.removeMouseListener(glassPaneDispatcher);
          old.removeMouseMotionListener(glassPaneDispatcher);

          Component newPane = (Component) evt.getNewValue();
          newPane.addMouseListener(glassPaneDispatcher);
          newPane.addMouseMotionListener(glassPaneDispatcher);

          frame.revalidate();
        }
      /*
       * FIXME: need to add ancestor properties to JComponents. else if
       * (evt.getPropertyName().equals(JComponent.ANCESTOR_PROPERTY)) { if
       * (desktopPane != null)
       * desktopPane.removeComponentListener(componentListener); desktopPane =
       * frame.getDesktopPane(); if (desktopPane != null)
       * desktopPane.addComponentListener(componentListener); }
       */
    }
  }

  /**
   * This helper class is the border for the JInternalFrame.
   */
  private class InternalFrameBorder extends AbstractBorder implements
      UIResource
  {
    /** The width of the border. */
    private static final int bSize = 5;

    /** The size of the corners. */
    private static final int offset = 10;

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

    /**
     * This method returns the insets of the border.
     * 
     * @param c
     *          The Component to find border insets for.
     * @return The border insets.
     */
    public Insets getBorderInsets(Component c)
    {
      return new Insets(bSize, bSize, bSize, bSize);
    }

    /**
     * This method paints the border.
     * 
     * @param c
     *          The Component that owns the border.
     * @param g
     *          The Graphics object to paint with.
     * @param x
     *          The x coordinate to paint at.
     * @param y
     *          The y coordinate to paint at.
     * @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)
    {
      g.translate(x, y);
      Color saved = g.getColor();
      Rectangle b = frame.getBounds();

      Color d = c.getBackground();
      g.setColor(d);
      g.fillRect(0, 0, bSize, b.height);
      g.fillRect(0, 0, b.width, bSize);
      g.fillRect(0, b.height - bSize, b.width, bSize);
      g.fillRect(b.width - bSize, 0, bSize, b.height);

      int x1 = 0;
      int x2 = bSize;
      int x3 = b.width - bSize;
      int x4 = b.width;

      int y1 = 0;
      int y2 = bSize;
      int y3 = b.height - bSize;
      int y4 = b.height;

      g.setColor(Color.GRAY);
      g.fillRect(0, 0, bSize, y4);
      g.fillRect(0, 0, x4, bSize);
      g.fillRect(0, y3, b.width, bSize);
      g.fillRect(x3, 0, bSize, b.height);

      g.fill3DRect(0, offset, bSize, b.height - 2 * offset, false);
      g.fill3DRect(offset, 0, b.width - 2 * offset, bSize, false);
      g.fill3DRect(offset, b.height - bSize, b.width - 2 * offset, bSize, false);
      g.fill3DRect(b.width - bSize, offset, bSize, b.height - 2 * offset, false);

      g.translate(-x, -y);
      g.setColor(saved);
    }
  }

  /**
   * The MouseListener that is responsible for dragging and resizing the
   * JInternalFrame in response to MouseEvents.
   */
  protected MouseInputAdapter borderListener;

  /**
   * The ComponentListener that is responsible for resizing the JInternalFrame
   * in response to ComponentEvents from the JDesktopPane.
   */
  protected ComponentListener componentListener;

  /**
   * The MouseListener that is responsible for activating the JInternalFrame
   * when the mouse press activates one of its descendents.
   */
  protected MouseInputListener glassPaneDispatcher;

  /**
   * The PropertyChangeListener that is responsible for listening to
   * PropertyChangeEvents from the JInternalFrame.
   */
  protected PropertyChangeListener propertyChangeListener;

  /** The InternalFrameListener that listens to the JInternalFrame. */
  private transient BasicInternalFrameListener internalFrameListener;

  /** The JComponent placed at the east region of the JInternalFrame. */
  protected JComponent eastPane;

  /** The JComponent placed at the north region of the JInternalFrame. */
  protected JComponent northPane;

  /** The JComponent placed at the south region of the JInternalFrame. */
  protected JComponent southPane;

  /** The JComponent placed at the west region of the JInternalFrame. */
  protected JComponent westPane;

  /**
   * The Keystroke bound to open the menu.
   * @deprecated
   */
  protected KeyStroke openMenuKey;

  /** The TitlePane displayed at the top of the JInternalFrame. */
  protected BasicInternalFrameTitlePane titlePane;

  /** The JInternalFrame this UI is responsible for. */
  protected JInternalFrame frame;

  /** The LayoutManager used in the JInternalFrame. */
  protected LayoutManager internalFrameLayout;

  /** The JDesktopPane that is the parent of the JInternalFrame. */
  private transient JDesktopPane desktopPane;

  /**
   * Creates a new BasicInternalFrameUI object.
   *
   * @param b The JInternalFrame this UI will represent.
   */
  public BasicInternalFrameUI(JInternalFrame b)
  {
    // Nothing to do here.
  }

  /**
   * This method will create a new BasicInternalFrameUI for the given
   * JComponent.
   *
   * @param b The JComponent to create a BasicInternalFrameUI for.
   *
   * @return A new BasicInternalFrameUI.
   */
  public static ComponentUI createUI(JComponent b)
  {
    return new BasicInternalFrameUI((JInternalFrame) b);
  }

  /**
   * This method installs a UI for the JInternalFrame.
   *
   * @param c The JComponent to install this UI on.
   */
  public void installUI(JComponent c)
  {
    if (c instanceof JInternalFrame)
      {
        frame = (JInternalFrame) c;

        installDefaults();
        installListeners();
        installComponents();
        installKeyboardActions();

        if (! frame.isSelected())
          frame.getGlassPane().setVisible(true);
      }
  }

  /**
   * This method reverses the work done by installUI.
   *
   * @param c The JComponent to uninstall this UI for.
   */
  public void uninstallUI(JComponent c)
  {
    uninstallKeyboardActions();
    uninstallComponents();
    uninstallListeners();
    uninstallDefaults();

    frame.getRootPane().getGlassPane().setVisible(false);
    frame = null;
  }

  /**
   * This method installs the defaults specified by the look and feel.
   */
  protected void installDefaults()
    {
      internalFrameLayout = createLayoutManager();
      frame.setLayout(internalFrameLayout);
      LookAndFeel.installBorder(frame, "InternalFrame.border");
      frame.setFrameIcon(UIManager.getIcon("InternalFrame.icon"));
  }

  /**
   * This method installs the keyboard actions for the JInternalFrame.
   */
  protected void installKeyboardActions()
  {
    // FIXME: Implement.
  }

  /**
   * This method installs the Components for the JInternalFrame.
   */
  protected void installComponents()
  {
    setNorthPane(createNorthPane(frame));
    setSouthPane(createSouthPane(frame));
    setEastPane(createEastPane(frame));
    setWestPane(createWestPane(frame));
  }

  /**
   * This method installs the listeners for the JInternalFrame.
   */
  protected void installListeners()
  {
    glassPaneDispatcher = createGlassPaneDispatcher();
    createInternalFrameListener();
    borderListener = createBorderListener(frame);
    componentListener = createComponentListener();
    propertyChangeListener = createPropertyChangeListener();

    frame.addMouseListener(borderListener);
    frame.addMouseMotionListener(borderListener);
    frame.addInternalFrameListener(internalFrameListener);
    frame.addPropertyChangeListener(propertyChangeListener);
    frame.getRootPane().getGlassPane().addMouseListener(glassPaneDispatcher);
    frame.getRootPane().getGlassPane().addMouseMotionListener(glassPaneDispatcher);
  }

  /**
   * This method uninstalls the defaults for the JInternalFrame.
   */
  protected void uninstallDefaults()
  {
    frame.setBorder(null);
    frame.setLayout(null);
    internalFrameLayout = null;
  }

  /**
   * This method uninstalls the Components for the JInternalFrame.
   */
  protected void uninstallComponents()
  {
    setNorthPane(null);
    setSouthPane(null);
    setEastPane(null);
    setWestPane(null);
  }

  /**
   * This method uninstalls the listeners for the JInternalFrame.
   */
  protected void uninstallListeners()
  {
    if (desktopPane != null)
      desktopPane.removeComponentListener(componentListener);

    frame.getRootPane().getGlassPane().removeMouseMotionListener(glassPaneDispatcher);
    frame.getRootPane().getGlassPane().removeMouseListener(glassPaneDispatcher);

    frame.removePropertyChangeListener(propertyChangeListener);
    frame.removeInternalFrameListener(internalFrameListener);
    frame.removeMouseMotionListener(borderListener);
    frame.removeMouseListener(borderListener);

    propertyChangeListener = null;
    componentListener = null;
    borderListener = null;
    internalFrameListener = null;
    glassPaneDispatcher = null;
  }

  /**
   * This method uninstalls the keyboard actions for the JInternalFrame.
   */
  protected void uninstallKeyboardActions()
  {
    // FIXME: Implement.
  }

  /**
   * This method creates a new LayoutManager for the JInternalFrame.
   *
   * @return A new LayoutManager for the JInternalFrame.
   */
  protected LayoutManager createLayoutManager()
  {
    return new InternalFrameLayout();
  }

  /**
   * This method creates a new PropertyChangeListener for the JInternalFrame.
   *
   * @return A new PropertyChangeListener for the JInternalFrame.
   */
  protected PropertyChangeListener createPropertyChangeListener()
  {
    return new InternalFramePropertyChangeListener();
  }

  /**
   * This method returns the preferred size of the given JComponent.
   *
   * @param x The JComponent to find a preferred size for.
   *
   * @return The preferred size.
   */
  public Dimension getPreferredSize(JComponent x)
  {