basicoptionpaneui.java

gcc的组建

    return messageArea;
  }

  /**
   * This method creates a new PropertyChangeListener for listening to the
   * JOptionPane.
   *
   * @return A new PropertyChangeListener.
   */
  protected PropertyChangeListener createPropertyChangeListener()
  {
    return new PropertyChangeHandler();
  }

  /**
   * This method creates a Container that will separate the message and button
   * areas.
   *
   * @return A Container that will separate the message and button areas.
   */
  protected Container createSeparator()
  {
    // FIXME: Figure out what this method is supposed to return and where
    // this should be added to the OptionPane.
    return null;
  }

  /**
   * This method creates a new BasicOptionPaneUI for the given component.
   *
   * @param x The component to create a UI for.
   *
   * @return A new BasicOptionPaneUI.
   */
  public static ComponentUI createUI(JComponent x)
  {
    return new BasicOptionPaneUI();
  }

  /**
   * This method returns the buttons for the JOptionPane. If no options are
   * set, a set of options will be created based upon the optionType.
   *
   * @return The buttons that will be added.
   */
  protected Object[] getButtons()
  {
    if (optionPane.getOptions() != null)
      return optionPane.getOptions();
    switch (optionPane.getOptionType())
      {
      case JOptionPane.YES_NO_OPTION:
	return new Object[] { YES_STRING, NO_STRING };
      case JOptionPane.YES_NO_CANCEL_OPTION:
	return new Object[] { YES_STRING, NO_STRING, CANCEL_STRING };
      case JOptionPane.OK_CANCEL_OPTION:
	return new Object[] { OK_STRING, CANCEL_STRING };
      case JOptionPane.DEFAULT_OPTION:
        return (optionPane.getWantsInput() ) ?
               new Object[] { OK_STRING, CANCEL_STRING } :
               ( optionPane.getMessageType() == JOptionPane.QUESTION_MESSAGE ) ?
               new Object[] { YES_STRING, NO_STRING, CANCEL_STRING } :
               // ERROR_MESSAGE, INFORMATION_MESSAGE, WARNING_MESSAGE, PLAIN_MESSAGE
               new Object[] { OK_STRING };
      }
    return null;
  }

  /**
   * This method will return the icon the user has set or the icon that will
   * be used based on message type.
   *
   * @return The icon to use in the JOptionPane.
   */
  protected Icon getIcon()
  {
    if (optionPane.getIcon() != null)
      return optionPane.getIcon();
    else
      return getIconForType(optionPane.getMessageType());
  }

  /**
   * This method returns the icon for the given messageType.
   *
   * @param messageType The type of message.
   *
   * @return The icon for the given messageType.
   */
  protected Icon getIconForType(int messageType)
  {
    Icon tmp = null;
    switch (messageType)
      {
      case JOptionPane.ERROR_MESSAGE:
	tmp = errorIcon;
	break;
      case JOptionPane.INFORMATION_MESSAGE:
	tmp = infoIcon;
	break;
      case JOptionPane.WARNING_MESSAGE:
	tmp = warningIcon;
	break;
      case JOptionPane.QUESTION_MESSAGE:
	tmp = questionIcon;
	break;
      }
    return tmp;
    // FIXME: Don't cast till the default icons are in.
    // return new IconUIResource(tmp);
  }

  /**
   * This method returns the index of the initialValue in the options array.
   *
   * @return The index of the initalValue.
   */
  protected int getInitialValueIndex()
  {
    Object[] buttons = getButtons();

    if (buttons == null)
      return -1;

    Object select = optionPane.getInitialValue();

    for (int i = 0; i < buttons.length; i++)
      {
	if (select == buttons[i])
	  return i;
      }
    return 0;
  }

  /**
   * This method returns the maximum number of characters that should be
   * placed on a line.
   *
   * @return The maximum number of characteres that should be placed on a
   *         line.
   */
  protected int getMaxCharactersPerLineCount()
  {
    return optionPane.getMaxCharactersPerLineCount();
  }

  /**
   * This method returns the maximum size.
   *
   * @param c The JComponent to measure.
   *
   * @return The maximum size.
   */
  public Dimension getMaximumSize(JComponent c)
  {
    return getPreferredSize(c);
  }

  /**
   * This method returns the message of the JOptionPane.
   *
   * @return The message.
   */
  protected Object getMessage()
  {
    return optionPane.getMessage();
  }

  /**
   * This method returns the minimum size of the JOptionPane.
   *
   * @return The minimum size.
   */
  public Dimension getMinimumOptionPaneSize()
  {
    return minimumSize;
  }

  /**
   * This method returns the minimum size.
   *
   * @param c The JComponent to measure.
   *
   * @return The minimum size.
   */
  public Dimension getMinimumSize(JComponent c)
  {
    return getPreferredSize(c);
  }

  /**
   * This method returns the preferred size of the JOptionPane. The preferred
   * size is the maximum of the size desired by the layout and the minimum
   * size.
   *
   * @param c The JComponent to measure.
   *
   * @return The preferred size.
   */
  public Dimension getPreferredSize(JComponent c)
  {
    Dimension d = optionPane.getLayout().preferredLayoutSize(optionPane);
    Dimension d2 = getMinimumOptionPaneSize();

    int w = Math.max(d.width, d2.width);
    int h = Math.max(d.height, d2.height);
    return new Dimension(w, h);
  }

  /**
   * This method returns whether all buttons should have the same width.
   *
   * @return Whether all buttons should have the same width.
   */
  protected boolean getSizeButtonsToSameWidth()
  {
    return true;
  }

  /**
   * This method installs components for the JOptionPane.
   */
  protected void installComponents()
  {
    // reset it.
    hasCustomComponents = false;
    Container msg = createMessageArea();
    if (msg != null)
      {
	((JComponent) msg).setBorder(messageBorder);
	msg.setForeground(messageForeground);
	messageAreaContainer = msg;
	optionPane.add(msg);
      }

    // FIXME: Figure out if the separator should be inserted here or what
    // this thing is supposed to do. Note: The JDK does NOT insert another
    // component at this place. The JOptionPane only has two panels in it
    // and there actually are applications that depend on this beeing so.
    Container sep = createSeparator();
    if (sep != null)
      optionPane.add(sep);

    Container button = createButtonArea();
    if (button != null)
      {
	((JComponent) button).setBorder(buttonBorder);
	buttonContainer = button;
	optionPane.add(button);
      }

    optionPane.setBorder(BorderFactory.createEmptyBorder(12, 12, 11, 11));
    optionPane.invalidate();
  }

  /**
   * This method installs defaults for the JOptionPane.
   */
  protected void installDefaults()
  {
    LookAndFeel.installColorsAndFont(optionPane, "OptionPane.background",
                                     "OptionPane.foreground",
                                     "OptionPane.font");
    LookAndFeel.installBorder(optionPane, "OptionPane.border");
    optionPane.setOpaque(true);

    messageBorder = UIManager.getBorder("OptionPane.messageAreaBorder");
    messageForeground = UIManager.getColor("OptionPane.messageForeground");
    buttonBorder = UIManager.getBorder("OptionPane.buttonAreaBorder");

    minimumSize = UIManager.getDimension("OptionPane.minimumSize");

    // FIXME: Image icons don't seem to work properly right now.
    // Once they do, replace the synthetic icons with these ones.

    /*
    warningIcon = (IconUIResource) defaults.getIcon("OptionPane.warningIcon");
    infoIcon = (IconUIResource) defaults.getIcon("OptionPane.informationIcon");
    errorIcon = (IconUIResource) defaults.getIcon("OptionPane.errorIcon");
    questionIcon = (IconUIResource) defaults.getIcon("OptionPane.questionIcon");
    */
  }

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

  /**
   * This method installs listeners for the JOptionPane.
   */
  protected void installListeners()
  {
    propertyChangeListener = createPropertyChangeListener();

    optionPane.addPropertyChangeListener(propertyChangeListener);
  }

  /**
   * This method installs the UI for the JOptionPane.
   *
   * @param c The JComponent to install the UI for.
   */
  public void installUI(JComponent c)
  {
    if (c instanceof JOptionPane)
      {
	optionPane = (JOptionPane) c;

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

  /**
   * Changes the inputValue property in the JOptionPane based on the current
   * value of the inputComponent.
   */
  protected void resetInputValue()
  {
    if (optionPane.getWantsInput() && inputComponent != null)
      {
	Object output = null;
	if (inputComponent instanceof JTextField)
	  output = ((JTextField) inputComponent).getText();
	else if (inputComponent instanceof JComboBox)
	  output = ((JComboBox) inputComponent).getSelectedItem();
	else if (inputComponent instanceof JList)
	  output = ((JList) inputComponent).getSelectedValue();

	if (output != null)
	  optionPane.setInputValue(output);
      }
  }

  /**
   * This method requests focus to the inputComponent (if one is present) and
   * the initialFocusComponent otherwise.
   *
   * @param op The JOptionPane.
   */
  public void selectInitialValue(JOptionPane op)
  {
    if (inputComponent != null)
      {
	inputComponent.requestFocus();
	return;
      }
    if (initialFocusComponent != null)
      initialFocusComponent.requestFocus();
  }

  /**
   * This method resets the value in the inputComponent to the
   * initialSelectionValue property.
   * This is package-private to avoid an accessor method.
   */
  void resetSelectedValue()
  {
    if (inputComponent != null)
      {
	Object init = optionPane.getInitialSelectionValue();
	if (init == null)
	  return;
	if (inputComponent instanceof JTextField)
	  ((JTextField) inputComponent).setText((String) init);
	else if (inputComponent instanceof JComboBox)
	  ((JComboBox) inputComponent).setSelectedItem(init);
	else if (inputComponent instanceof JList)
	  {
	    //  ((JList) inputComponent).setSelectedValue(init, true);
	  }
      }
  }

  /**
   * This method uninstalls all the components in the JOptionPane.
   */
  protected void uninstallComponents()
  {
    optionPane.removeAll();
    buttonContainer = null;
    messageAreaContainer = null;
  }

  /**
   * This method uninstalls the defaults for the JOptionPane.
   */
  protected void uninstallDefaults()
  {
    optionPane.setFont(null);
    optionPane.setForeground(null);
    optionPane.setBackground(null);

    minimumSize = null;

    messageBorder = null;
    buttonBorder = null;
    messageForeground = null;

    // FIXME: ImageIcons don't seem to work properly

    /*
    warningIcon = null;
    errorIcon = null;
    questionIcon = null;
    infoIcon = null;
    */
  }

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

  /**
   * This method uninstalls listeners for the JOptionPane.
   */
  protected void uninstallListeners()
  {
    optionPane.removePropertyChangeListener(propertyChangeListener);
    propertyChangeListener = null;
  }

  /**
   * This method uninstalls the UI for the given JComponent.
   *
   * @param c The JComponent to uninstall for.
   */
  public void uninstallUI(JComponent c)
  {
    uninstallKeyboardActions();
    uninstallListeners();
    uninstallComponents();
    uninstallDefaults();

    optionPane = null;
  }
}