basicoptionpaneui.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

			totalWidth += ((numChildren - 1) * padding);
			return new Dimension(extraWidth + totalWidth, extraHeight + height);
		    }
		}
	    }
	    return new Dimension(0, 0);
	}

	public Dimension preferredLayoutSize(Container c) {
	    return minimumLayoutSize(c);
	}

	public void removeLayoutComponent(Component c) { }
    }


    /**
     * This inner class is marked "public" due to a compiler bug.
     * This class should be treated as a "protected" inner class.
     * Instantiate it only within subclasses of BasicOptionPaneUI.
     */  
    public class PropertyChangeHandler implements PropertyChangeListener {
        /**
         * If the source of the PropertyChangeEvent <code>e</code> equals the
         * optionPane and is one of the ICON_PROPERTY, MESSAGE_PROPERTY,
         * OPTIONS_PROPERTY or INITIAL_VALUE_PROPERTY,
         * validateComponent is invoked.
         */
        public void propertyChange(PropertyChangeEvent e) {
            getHandler().propertyChange(e);
	}
    }

    /**
     * Configures any necessary colors/fonts for the specified label
     * used representing the message.
     */
    private void configureMessageLabel(JLabel label) {
        Color color = (Color)DefaultLookup.get(optionPane, this,
                                               "OptionPane.messageForeground");
        if (color != null) {
            label.setForeground(color);
        }
        Font messageFont = (Font)DefaultLookup.get(optionPane, this,
                                                   "OptionPane.messageFont");
        if (messageFont != null) {
            label.setFont(messageFont);
        }
    }

    /**
     * Configures any necessary colors/fonts for the specified button
     * used representing the button portion of the optionpane.
     */
    private void configureButton(JButton button) {
        Font buttonFont = (Font)DefaultLookup.get(optionPane, this,
                                            "OptionPane.buttonFont");
        if (buttonFont != null) {
            button.setFont(buttonFont);
        }
    }

    /**
     * This inner class is marked &quot;public&quot; due to a compiler bug.
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicOptionPaneUI.
     */  
    public class ButtonActionListener implements ActionListener {
        protected int buttonIndex;

        public ButtonActionListener(int buttonIndex) {
            this.buttonIndex = buttonIndex;
        }

        public void actionPerformed(ActionEvent e) {
	    if (optionPane != null) {
   	        int optionType = optionPane.getOptionType();
	        Object[] options = optionPane.getOptions();

                /* If the option pane takes input, then store the input value
                 * if custom options were specified, if the option type is
                 * DEFAULT_OPTION, OR if option type is set to a predefined
                 * one and the user chose the affirmative answer.
                 */
 		if (inputComponent != null) {
                    if (options != null ||
                        optionType == JOptionPane.DEFAULT_OPTION ||
      		        ((optionType == JOptionPane.YES_NO_OPTION ||
 		         optionType == JOptionPane.YES_NO_CANCEL_OPTION ||
 		         optionType == JOptionPane.OK_CANCEL_OPTION) &&
 		         buttonIndex == 0)) {
 		        resetInputValue();
                    }
                }
	        if (options == null) {
		    if (optionType == JOptionPane.OK_CANCEL_OPTION &&
                        buttonIndex == 1) {
		        optionPane.setValue(new Integer(2));
                    
		    } else {
		        optionPane.setValue(new Integer(buttonIndex));
                    }
	        } else {
		    optionPane.setValue(options[buttonIndex]);
                }
	    }
        }
    }


    private class Handler implements ActionListener, MouseListener,
                                     PropertyChangeListener {
        //
        // ActionListener
        //
	public void actionPerformed(ActionEvent e) {
	    optionPane.setInputValue(((JTextField)e.getSource()).getText());
	}


        //
        // MouseListener
        //
        public void mouseClicked(MouseEvent e) {
        }

        public void mouseReleased(MouseEvent e) {
        }

        public void mouseEntered(MouseEvent e) {
        }

        public void mouseExited(MouseEvent e) {
        }

	public void mousePressed(MouseEvent e) {
	    if (e.getClickCount() == 2) {
		JList     list = (JList)e.getSource();
		int       index = list.locationToIndex(e.getPoint());

		optionPane.setInputValue(list.getModel().getElementAt(index));
	    }
	}

        //
        // PropertyChangeListener
        //
        public void propertyChange(PropertyChangeEvent e) {
	    if(e.getSource() == optionPane) {
		// Option Pane Auditory Cue Activation
		// only respond to "ancestor" changes
		// the idea being that a JOptionPane gets a JDialog when it is 
		// set to appear and loses it's JDialog when it is dismissed.
		if ("ancestor" == e.getPropertyName()) {
		    JOptionPane op = (JOptionPane)e.getSource();
		    boolean isComingUp;
		    
		    // if the old value is null, then the JOptionPane is being
		    // created since it didn't previously have an ancestor.
		    if (e.getOldValue() == null) {
			isComingUp = true;
		    } else {
			isComingUp = false;
		    }
		    
		    // figure out what to do based on the message type
		    switch (op.getMessageType()) {
		    case JOptionPane.PLAIN_MESSAGE:
			if (isComingUp) {
                            BasicLookAndFeel.playSound(optionPane,
                                               "OptionPane.informationSound");
			}
			break;
		    case JOptionPane.QUESTION_MESSAGE:
			if (isComingUp) {
                            BasicLookAndFeel.playSound(optionPane,
                                             "OptionPane.questionSound");
			}
			break;
		    case JOptionPane.INFORMATION_MESSAGE:
			if (isComingUp) {
                            BasicLookAndFeel.playSound(optionPane,
                                             "OptionPane.informationSound");
			}
			break;
		    case JOptionPane.WARNING_MESSAGE:
			if (isComingUp) {
                            BasicLookAndFeel.playSound(optionPane,
                                             "OptionPane.warningSound");
			}
			break;
		    case JOptionPane.ERROR_MESSAGE:
			if (isComingUp) {
                            BasicLookAndFeel.playSound(optionPane,
			                     "OptionPane.errorSound");
			}
			break;
		    default:
			System.err.println("Undefined JOptionPane type: " +
					   op.getMessageType());
			break;
		    }
		}
		// Visual activity
	        String         changeName = e.getPropertyName();

	        if(changeName == JOptionPane.OPTIONS_PROPERTY ||
    	           changeName == JOptionPane.INITIAL_VALUE_PROPERTY ||
	           changeName == JOptionPane.ICON_PROPERTY ||
	           changeName == JOptionPane.MESSAGE_TYPE_PROPERTY ||
	           changeName == JOptionPane.OPTION_TYPE_PROPERTY ||
	           changeName == JOptionPane.MESSAGE_PROPERTY ||
	           changeName == JOptionPane.SELECTION_VALUES_PROPERTY ||
	           changeName == JOptionPane.INITIAL_SELECTION_VALUE_PROPERTY ||
	           changeName == JOptionPane.WANTS_INPUT_PROPERTY) {
                   uninstallComponents();
                   installComponents();
                   optionPane.validate();
                }
		else if (changeName == "componentOrientation") {
		    ComponentOrientation o = (ComponentOrientation)e.getNewValue();
		    JOptionPane op = (JOptionPane)e.getSource();
		    if (o != (ComponentOrientation)e.getOldValue()) {
			op.applyComponentOrientation(o);
		    }
		}
            }
        }
    }


    //
    // Classes used when optionPane.getWantsInput returns true.
    //

    /**
     * A JTextField that allows you to specify an array of KeyStrokes that
     * that will have their bindings processed regardless of whether or
     * not they are registered on the JTextField. This is used as we really
     * want the ActionListener to be notified so that we can push the
     * change to the JOptionPane, but we also want additional bindings
     * (those of the JRootPane) to be processed as well.
     */
    private static class MultiplexingTextField extends JTextField {
        private KeyStroke[] strokes;

        MultiplexingTextField(int cols) {
            super(cols);
        }

        /**
         * Sets the KeyStrokes that will be additional processed for
         * ancestor bindings.
         */
        void setKeyStrokes(KeyStroke[] strokes) {
            this.strokes = strokes;
        }

        protected boolean processKeyBinding(KeyStroke ks, KeyEvent e,
                                            int condition, boolean pressed) {
            boolean processed = super.processKeyBinding(ks, e, condition,
                                                        pressed);

            if (processed && condition != JComponent.WHEN_IN_FOCUSED_WINDOW) {
                for (int counter = strokes.length - 1; counter >= 0;
                         counter--) {
                    if (strokes[counter].equals(ks)) {
                        // Returning false will allow further processing
                        // of the bindings, eg our parent Containers will get a
                        // crack at them.
                        return false;
                    }
                }
            }
            return processed;
        }
    }



    /**
     * Registered in the ActionMap. Sets the value of the option pane
     * to <code>JOptionPane.CLOSED_OPTION</code>.
     */
    private static class Actions extends UIAction {
        private static final String CLOSE = "close";

        Actions(String key) {
            super(key);
        }

	public void actionPerformed(ActionEvent e) {
            if (getName() == CLOSE) {
                JOptionPane optionPane = (JOptionPane)e.getSource();

                optionPane.setValue(new Integer(JOptionPane.CLOSED_OPTION));
            }
	}
    }


    /**
     * This class is used to create the default buttons. This indirection is
     * used so that addButtonComponents can tell which Buttons were created
     * by us vs subclassers or from the JOptionPane itself.
     */
    private static class ButtonFactory {
        private String text;
        private int mnemonic;
        private Icon icon;
        private int minimumWidth = -1;

        ButtonFactory(String text, int mnemonic, Icon icon, int minimumWidth) {
            this.text = text;
            this.mnemonic = mnemonic;
            this.icon = icon;
            this.minimumWidth = minimumWidth;
        }

        JButton createButton() {
            JButton button = null;

            if (minimumWidth > 0) {
                button = new ConstrainedButton(text, minimumWidth);
            } else {
                button = new JButton(text);
            }
            if (icon != null) {
                button.setIcon(icon);
            }
            if (mnemonic != 0) {
                button.setMnemonic(mnemonic);
            }
            return button;
        }
        
        private static class ConstrainedButton extends JButton {
            int minimumWidth;

            ConstrainedButton(String text, int minimumWidth) {
                super(text);
                this.minimumWidth = minimumWidth;
            }

            public Dimension getMinimumSize() {
                Dimension min = super.getMinimumSize();
                min.width = Math.max(min.width, minimumWidth);
                return min;
            }

            public Dimension getPreferredSize() {
                Dimension pref = super.getPreferredSize();
                pref.width = Math.max(pref.width, minimumWidth);
                return pref;
            }
        }
    }
}