synthoptionpaneui.java

来自「java jdk 1.4的源码」· Java 代码 · 共 1,377 行 · 第 1/4 页

/*
 * @(#)SynthOptionPaneUI.java	1.11 03/01/23
 *
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package com.sun.java.swing.plaf.gtk;

import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.ActionMapUIResource;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.OptionPaneUI;
import java.awt.*;
import java.awt.event.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Locale;
import java.security.AccessController;
import sun.security.action.GetPropertyAction;


/**
 * Provides the basic look and feel for a <code>JOptionPane</code>.
 * <code>BasicMessagePaneUI</code> provides a means to place an icon,
 * message and buttons into a <code>Container</code>.
 * Generally, the layout will look like:<p>
 * <pre>
 *        ------------------
 *        | i | message    |
 *        | c | message    |
 *        | o | message    |
 *        | n | message    |
 *        ------------------
 *        |     buttons    |
 *        |________________|
 * </pre>
 * icon is an instance of <code>Icon</code> that is wrapped inside a
 * <code>JLabel</code>.  The message is an opaque object and is tested
 * for the following: if the message is a <code>Component</code> it is
 * added to the <code>Container</code>, if it is an <code>Icon</code>
 * it is wrapped inside a <code>JLabel</code> and added to the 
 * <code>Container</code> otherwise it is wrapped inside a <code>JLabel</code>.
 * <p>
 * The above layout is used when the option pane's 
 * <code>ComponentOrientation</code> property is horizontal, left-to-right.
 * The layout will be adjusted appropriately for other orientations.
 * <p>
 * The <code>Container</code>, message, icon, and buttons are all
 * determined from abstract methods.
 * 
 * @version 1.11, 01/23/03 (based on BasicOptionPaneUI v 1.54)
 * @author James Gosling
 * @author Scott Violet
 * @author Amy Fowler
 */
class SynthOptionPaneUI extends OptionPaneUI implements SynthUI{
    public static final int MinimumWidth = 262;
    public static final int MinimumHeight = 90;

    private static String newline;

    private SynthStyle style;

    /**
     * <code>JOptionPane</code> that the receiver is providing the
     * look and feel for.
     */
    protected JOptionPane         optionPane;

    protected Dimension minimumSize;

    /** JComponent provide for input if optionPane.getWantsInput() returns
     * true. */
    protected JComponent          inputComponent;

    /** Component to receive focus when messaged with selectInitialValue. */
    protected Component           initialFocusComponent;

    /** This is set to true in validateComponent if a Component is contained
     * in either the message or the buttons. */
    protected boolean             hasCustomComponents;

    protected PropertyChangeListener propertyChangeListener;

    private int multiClickThreshold;


    static {
	newline = (String)java.security.AccessController.doPrivileged(
                                new GetPropertyAction("line.separator"));
        if (newline == null) {
            newline = "\n";
        }
    }


    /**
      * Creates a new BasicOptionPaneUI instance.
      */
    public static ComponentUI createUI(JComponent x) {
	return new SynthOptionPaneUI();
    }

   public static void loadActionMap(ActionMap map) {
        // NOTE: this needs to remain static. If you have a need to
        // have Actions that reference the UI in the ActionMap,
        // then you'll also need to change the registeration of the
        // ActionMap.
	map.put("close", new CloseAction());
	// Set the ActionMap's parent to the Auditory Feedback Action Map
        // PENDING: audio
/*
	BasicLookAndFeel lf = (BasicLookAndFeel)UIManager.getLookAndFeel();
	ActionMap audioMap = lf.getAudioActionMap();
	map.setParent(audioMap);
*/
    }

     /**
      * Installs the receiver as the L&F for the passed in
      * <code>JOptionPane</code>.
      */
    public void installUI(JComponent c) {
	optionPane = (JOptionPane)c;
        installDefaults();
        optionPane.setLayout(createLayoutManager());
	installComponents();
        installListeners(); 
        installKeyboardActions();
    }

    /**
      * Removes the receiver from the L&F controller of the passed in split
      * pane.
      */
    public void uninstallUI(JComponent c) {
        uninstallComponents();
        optionPane.setLayout(null);
        uninstallKeyboardActions();
        uninstallListeners();
        uninstallDefaults();
	optionPane = null;
    }

    protected void installDefaults() {
        fetchStyle(optionPane);
    }

    private void fetchStyle(JComponent c) {
        SynthContext context = getContext(c, ENABLED);
        SynthStyle oldStyle = style;

        style = SynthLookAndFeel.updateStyle(context, this);
        if (style != oldStyle) {
            minimumSize = (Dimension)style.get(context,
                                               "OptionPane.minimumSize");
            multiClickThreshold = style.getInt(
                      context, "OptionPane.buttonClickThreshhold", 0);
        }
        context.dispose();
    }

    protected void uninstallDefaults() {
        SynthContext context = getContext(optionPane, ENABLED);

        style.uninstallDefaults(context);
        context.dispose();
        style = null;
    }

    protected void installComponents() {
	optionPane.add(createMessageArea());
        
        Container separator = createSeparator();
        if (separator != null) {
            optionPane.add(separator);
            SynthContext context = getContext(optionPane, ENABLED);
            optionPane.add(Box.createVerticalStrut(context.getStyle().
                       getInt(context, "OptionPane.separatorPadding", 6)));
            context.dispose();
        }
	optionPane.add(createButtonArea());
	optionPane.applyComponentOrientation(optionPane.getComponentOrientation());
    }

    protected void uninstallComponents() {
	hasCustomComponents = false;
        inputComponent = null;
	initialFocusComponent = null;
	optionPane.removeAll();
    }

    protected LayoutManager createLayoutManager() {
        return new BoxLayout(optionPane, BoxLayout.Y_AXIS);
    }

    protected void installListeners() {
        if ((propertyChangeListener = createPropertyChangeListener()) != null) {
            optionPane.addPropertyChangeListener(propertyChangeListener);
        }
    }

    protected void uninstallListeners() {
        if (propertyChangeListener != null) {
            optionPane.removePropertyChangeListener(propertyChangeListener);
            propertyChangeListener = null;
        }
    }

    protected PropertyChangeListener createPropertyChangeListener() {
        return new PropertyChangeHandler();
    }

    protected void installKeyboardActions() {
	InputMap map = getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);

	SwingUtilities.replaceUIInputMap(optionPane, JComponent.
				       WHEN_IN_FOCUSED_WINDOW, map);
        LazyActionMap.installLazyActionMap(optionPane, SynthOptionPaneUI.class,
                                           "OptionPane.actionMap");
    }

    protected void uninstallKeyboardActions() {
	SwingUtilities.replaceUIInputMap(optionPane, JComponent.
				       WHEN_IN_FOCUSED_WINDOW, null);
	SwingUtilities.replaceUIActionMap(optionPane, null);
    }

    InputMap getInputMap(int condition) {
	if (condition == JComponent.WHEN_IN_FOCUSED_WINDOW) {
            SynthContext context = getContext(optionPane, ENABLED);
	    Object[] bindings = (Object[])context.getStyle().get
		                (context, "OptionPane.windowBindings");
            InputMap map = null;

	    if (bindings != null) {
		map = LookAndFeel.makeComponentInputMap(optionPane, bindings);
	    }
            context.dispose();
            return map;
	}
	return null;
    }

    public SynthContext getContext(JComponent c) {
        return getContext(c, getComponentState(c));
    }

    private SynthContext getContext(JComponent c, int state) {
        return SynthContext.getContext(SynthContext.class, c,
                    SynthLookAndFeel.getRegion(c), style, state);
    }

    private Region getRegion(JComponent c) {
        return SynthLookAndFeel.getRegion(c);
    }

    private int getComponentState(JComponent c) {
        return SynthLookAndFeel.getComponentState(c);
    }

    public void update(Graphics g, JComponent c) {
        SynthContext context = getContext(c);

        SynthLookAndFeel.update(context, g);
        paint(context, g);
        context.dispose();
    }

    public void paint(Graphics g, JComponent c) {
        SynthContext context = getContext(c);

        paint(context, g);
        context.dispose();
    }

    protected void paint(SynthContext context, Graphics g) {
    }

    /**
     * Returns the minimum size the option pane should be. Primarily
     * provided for subclassers wishing to offer a different minimum size.
     */
    public Dimension getMinimumOptionPaneSize() {
        if (minimumSize == null) {
            return new Dimension(MinimumWidth, MinimumHeight);
        }
	return new Dimension(minimumSize.width,
			     minimumSize.height);
    }

    /**
     * If <code>c</code> is the <code>JOptionPane</code> the receiver
     * is contained in, the preferred
     * size that is returned is the maximum of the preferred size of
     * the <code>LayoutManager</code> for the <code>JOptionPane</code>, and
     * <code>getMinimumOptionPaneSize</code>.
     */
    public Dimension getPreferredSize(JComponent c) {
	if ((JOptionPane)c == optionPane) {
	    Dimension            ourMin = getMinimumOptionPaneSize();
	    LayoutManager        lm = c.getLayout();

	    if (lm != null) {
		Dimension         lmSize = lm.preferredLayoutSize(c);

		if (ourMin != null)
		    return new Dimension
			(Math.max(lmSize.width, ourMin.width),
			 Math.max(lmSize.height, ourMin.height));
		return lmSize;
	    }
	    return ourMin;
	}
	return null;
    }

    /**
     * Messaged from installComponents to create a Container containing the
     * body of the message. The icon is the created by calling
     * <code>addIcon</code>.
     */
    protected Container createMessageArea() {
        JPanel top = new JPanel();
        top.setName("OptionPane.messageArea");
	top.setLayout(new BorderLayout());

	/* Fill the body. */
	Container          body = new JPanel(new GridBagLayout());
	Container          realBody = new JPanel(new BorderLayout());

        body.setName("OptionPane.body");
        realBody.setName("OptionPane.realBody");

	if (getIcon() != null) {
            JPanel sep = new JPanel();
            sep.setName("OptionPane.separator");
            sep.setPreferredSize(new Dimension(15, 1));
	    realBody.add(sep, BorderLayout.BEFORE_LINE_BEGINS);
	}
	realBody.add(body, BorderLayout.CENTER);