synthlookandfeel.java

java1.6众多例子参考

    /**
     * Returns the defaults for this SynthLookAndFeel.
     *
     * @return Defaults table.
     */
    @Override
    public UIDefaults getDefaults() {
        UIDefaults table = new UIDefaults(60, 0.75f);
    
        Region.registerUIs(table);
        table.setDefaultLocale(Locale.getDefault());
        table.addResourceBundle(
              "com.sun.swing.internal.plaf.basic.resources.basic" );
        table.addResourceBundle("com.sun.swing.internal.plaf.synth.resources.synth");

        // SynthTabbedPaneUI supports rollover on tabs, GTK does not
        table.put("TabbedPane.isTabRollover", Boolean.TRUE);
        
        // These need to be defined for JColorChooser to work.
        table.put("ColorChooser.swatchesRecentSwatchSize",
                  new Dimension(10, 10));
        table.put("ColorChooser.swatchesDefaultRecentColor", Color.RED);
        table.put("ColorChooser.swatchesSwatchSize", new Dimension(10, 10));

        // These are needed for PopupMenu.
        table.put("PopupMenu.selectedWindowInputMapBindings", new Object[] {
		  "ESCAPE", "cancel",
                    "DOWN", "selectNext",
		 "KP_DOWN", "selectNext",
		      "UP", "selectPrevious",
		   "KP_UP", "selectPrevious",
		    "LEFT", "selectParent",
		 "KP_LEFT", "selectParent",
		   "RIGHT", "selectChild",
		"KP_RIGHT", "selectChild",
		   "ENTER", "return",
		   "SPACE", "return"
        });
        table.put("PopupMenu.selectedWindowInputMapBindings.RightToLeft",
                  new Object[] {
		    "LEFT", "selectChild",
		 "KP_LEFT", "selectChild",
		   "RIGHT", "selectParent",
		"KP_RIGHT", "selectParent",
                  });
        
        // enabled antialiasing depending on desktop settings
        flushUnreferenced();
        Object aaTextInfo = getAATextInfo();
        table.put(SwingUtilities2.AA_TEXT_PROPERTY_KEY, aaTextInfo);
        new AATextListener(this);

        if (defaultsMap != null) {
            table.putAll(defaultsMap);
        }
        return table;
    }

    /**
     * Returns true, SynthLookAndFeel is always supported.
     *
     * @return true.
     */
    @Override
    public boolean isSupportedLookAndFeel() {
        return true;
    }

    /**
     * Returns false, SynthLookAndFeel is not a native look and feel.
     *
     * @return false
     */
    @Override
    public boolean isNativeLookAndFeel() {
        return false;
    }

    /**
     * Returns a textual description of SynthLookAndFeel.
     *
     * @return textual description of synth.
     */
    @Override
    public String getDescription() {
        return "Synth look and feel";
    }

    /**
     * Return a short string that identifies this look and feel.
     *
     * @return a short string identifying this look and feel.
     */
    @Override
    public String getName() {
        return "Synth look and feel";
    }

    /**
     * Return a string that identifies this look and feel.
     *
     * @return a short string identifying this look and feel.
     */
    @Override
    public String getID() {
        return "Synth";
    }

    /**
     * Returns whether or not the UIs should update their
     * <code>SynthStyles</code> from the <code>SynthStyleFactory</code>
     * when the ancestor of the <code>JComponent</code> changes. A subclass
     * that provided a <code>SynthStyleFactory</code> that based the
     * return value from <code>getStyle</code> off the containment hierarchy
     * would override this method to return true.
     *
     * @return whether or not the UIs should update their
     * <code>SynthStyles</code> from the <code>SynthStyleFactory</code>
     * when the ancestor changed.
     */
    public boolean shouldUpdateStyleOnAncestorChanged() {
        return false;
    }
    
    /**
     * Returns the antialiasing information as specified by the host desktop.
     * Antialiasing might be forced off if the desktop is GNOME and the user
     * has set his locale to Chinese, Japanese or Korean. This is consistent
     * with what GTK does. See com.sun.java.swing.plaf.gtk.GtkLookAndFeel
     * for more information about CJK and antialiased fonts.
     * 
     * @return the text antialiasing information associated to the desktop 
     */
    private static Object getAATextInfo() {
        String language = Locale.getDefault().getLanguage();
        String desktop = (String)
            AccessController.doPrivileged(new GetPropertyAction("sun.desktop"));
        
        boolean isCjkLocale = (Locale.CHINESE.getLanguage().equals(language) ||
                Locale.JAPANESE.getLanguage().equals(language) ||
                Locale.KOREAN.getLanguage().equals(language));
        boolean isGnome = "gnome".equals(desktop);
        boolean isLocal = SwingUtilities2.isLocalDisplay();
        
        boolean setAA = isLocal && (!isGnome || !isCjkLocale);

        Object aaTextInfo = SwingUtilities2.AATextInfo.getAATextInfo(setAA);
        return aaTextInfo;
    }
    
    private static ReferenceQueue queue = new ReferenceQueue();

    private static void flushUnreferenced() {
        AATextListener aatl;
        while ((aatl = (AATextListener) queue.poll()) != null) {
            aatl.dispose();
        }
    }
    
    private static class AATextListener
        extends WeakReference implements PropertyChangeListener {
        private String key = SunToolkit.DESKTOPFONTHINTS;
    
        AATextListener(LookAndFeel laf) {
            super(laf, queue);
            Toolkit tk = Toolkit.getDefaultToolkit();
            tk.addPropertyChangeListener(key, this);
        }
    
        @Override
        public void propertyChange(PropertyChangeEvent pce) {
            UIDefaults defaults = UIManager.getLookAndFeelDefaults();
            if (defaults.getBoolean("Synth.doNotSetTextAA")) {
                dispose();
                return;
            }
            
            LookAndFeel laf = (LookAndFeel) get();
            if (laf == null || laf != UIManager.getLookAndFeel()) {
                dispose();
                return;
            }

            Object aaTextInfo = getAATextInfo();
            defaults.put(SwingUtilities2.AA_TEXT_PROPERTY_KEY, aaTextInfo);

            updateUI();
        }
    
        void dispose() {
            Toolkit tk = Toolkit.getDefaultToolkit();
            tk.removePropertyChangeListener(key, this);
        }
    
        /**
         * Updates the UI of the passed in window and all its children.
         */
        private static void updateWindowUI(Window window) {
            updateStyles(window);
            Window ownedWins[] = window.getOwnedWindows();
            for (int i = 0; i < ownedWins.length; i++) {
                updateWindowUI(ownedWins[i]);
            }
        }
    
        /**
         * Updates the UIs of all the known Frames.
         */
        private static void updateAllUIs() {
            Frame appFrames[] = Frame.getFrames();
            for (int i = 0; i < appFrames.length; i++) {
                updateWindowUI(appFrames[i]);
            }
        }
    
        /**
         * Indicates if an updateUI call is pending.
         */
        private static boolean updatePending;
    
        /**
         * Sets whether or not an updateUI call is pending.
         */
        private static synchronized void setUpdatePending(boolean update) {
            updatePending = update;
        }
    
        /**
         * Returns true if a UI update is pending.
         */
        private static synchronized boolean isUpdatePending() {
            return updatePending;
        }
    
        protected void updateUI() {
            if (!isUpdatePending()) {
                setUpdatePending(true);
                Runnable uiUpdater = new Runnable() {
                    @Override
                    public void run() {
                        updateAllUIs();
                        setUpdatePending(false);
                    }
                };
                SwingUtilities.invokeLater(uiUpdater);
            }
        }
    }
    
    private void writeObject(java.io.ObjectOutputStream out) 
            throws IOException {
        throw new NotSerializableException(this.getClass().getName());
    }

    private class Handler implements PropertyChangeListener {
        @Override
        public void propertyChange(PropertyChangeEvent evt) {
            String propertyName = evt.getPropertyName();
            Object newValue = evt.getNewValue();
            Object oldValue = evt.getOldValue();

            if ("focusOwner" == propertyName) {
                if (oldValue instanceof JComponent) {
                    repaintIfBackgroundsDiffer((JComponent)oldValue);

                }

                if (newValue instanceof JComponent) {
                    repaintIfBackgroundsDiffer((JComponent)newValue);
                }
            }
            else if ("managingFocus" == propertyName) {
                // De-register listener on old keyboard focus manager and
                // register it on the new one.
                KeyboardFocusManager manager =
                    (KeyboardFocusManager)evt.getSource();
                if (((Boolean)newValue).equals(Boolean.FALSE)) {
                    manager.removePropertyChangeListener(_handler);
                }
                else {
                    manager.addPropertyChangeListener(_handler);
                }
            }
        }

        /**
         * This is a support method that will check if the background colors of
         * the specified component differ between focused and unfocused states.
         * If the color differ the component will then repaint itself.
         *
         * @comp the component to check
         */
        private void repaintIfBackgroundsDiffer(JComponent comp) {
            ComponentUI ui = (ComponentUI)comp.getClientProperty(
                    SwingUtilities2.COMPONENT_UI_PROPERTY_KEY);
            if (ui instanceof SynthUI) {
                SynthUI synthUI = (SynthUI)ui;
                SynthContext context = synthUI.getContext(comp);
                SynthStyle style = context.getStyle();
                int state = context.getComponentState();

                // Get the current background color.
                Color currBG = style.getColor(context, ColorType.BACKGROUND);

                // Get the last background color.
                state ^= SynthConstants.FOCUSED;
                context.setComponentState(state);
                Color lastBG = style.getColor(context, ColorType.BACKGROUND);

                // Reset the component state back to original.
                state ^= SynthConstants.FOCUSED;
                context.setComponentState(state);

                // Repaint the component if the backgrounds differed.
                if (currBG != null && !currBG.equals(lastBG)) {
                    comp.repaint();
                }
                context.dispose();
            }
        }
    }
}