synthlookandfeel.java

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

     */
    public static Region getRegion(JComponent c) {
        return Region.getRegion(c);
    }

    /**
     * A convenience method to return where the foreground should be
     * painted for the Component identified by the passed in
     * AbstractSynthContext.
     */
    static Insets getPaintingInsets(SynthContext state, Insets insets) {
        if (state.isSubregion()) {
            insets = state.getStyle().getInsets(state, insets);
        }
        else {
            insets = state.getComponent().getInsets(insets);
        }
        return insets;
    }

    /**
     * A convenience method that handles painting of the background.
     * All SynthUI implementations should override update and invoke
     * this method.
     */
    static void update(SynthContext state, Graphics g) {
        paintRegion(state, g, null);
    }

    /**
     * A convenience method that handles painting of the background for
     * subregions. All SynthUI's that have subregions should invoke
     * this method, than paint the foreground.
     */
    static void updateSubregion(SynthContext state, Graphics g,
                                Rectangle bounds) {
        paintRegion(state, g, bounds);
    }

    private static void paintRegion(SynthContext state, Graphics g,
                                    Rectangle bounds) {
        JComponent c = state.getComponent();
        SynthStyle style = state.getStyle();
        int x, y, width, height;

        if (bounds == null) {
            x = 0;
            y = 0;
            width = c.getWidth();
            height = c.getHeight();
        }
        else {
            x = bounds.x;
            y = bounds.y;
            width = bounds.width;
            height = bounds.height;
        }

        // Fill in the background, if necessary.
        boolean subregion = state.isSubregion();
        if ((subregion && style.isOpaque(state)) ||
                          (!subregion && c.isOpaque())) {
            g.setColor(style.getColor(state, ColorType.BACKGROUND));
            g.fillRect(x, y, width, height);
        }
    }

    static boolean isLeftToRight(Component c) {
        return c.getComponentOrientation().isLeftToRight();
    }

    /**
     * Returns the ui that is of type <code>klass</code>, or null if
     * one can not be found.
     */
    static Object getUIOfType(ComponentUI ui, Class klass) {
        if (klass.isInstance(ui)) {
            return ui;
        }
        return null;
    }

    /**
     * Creates the Synth look and feel <code>ComponentUI</code> for
     * the passed in <code>JComponent</code>.
     *
     * @param c JComponent to create the <code>ComponentUI</code> for
     * @return ComponentUI to use for <code>c</code>
     */
    public static ComponentUI createUI(JComponent c) {
        String key = c.getUIClassID().intern();

        if (key == "ButtonUI") {
            return SynthButtonUI.createUI(c);
        }
        else if (key == "CheckBoxUI") {
            return SynthCheckBoxUI.createUI(c);
        }
        else if (key == "CheckBoxMenuItemUI") {
            return SynthCheckBoxMenuItemUI.createUI(c);
        }
        else if (key == "ColorChooserUI") {
            return SynthColorChooserUI.createUI(c);
        }
        else if (key == "ComboBoxUI") {
            return SynthComboBoxUI.createUI(c);
        }
        else if (key == "DesktopPaneUI") {
            return SynthDesktopPaneUI.createUI(c);
        }
        else if (key == "DesktopIconUI") {
            return SynthDesktopIconUI.createUI(c);
        }
        else if (key == "EditorPaneUI") {
            return SynthEditorPaneUI.createUI(c);
        }
        else if (key == "FileChooserUI") {
            return SynthFileChooserUI.createUI(c);
        }
        else if (key == "FormattedTextFieldUI") {
            return SynthFormattedTextFieldUI.createUI(c);
        }
        else if (key == "InternalFrameUI") {
            return SynthInternalFrameUI.createUI(c);
        }
        else if (key == "LabelUI") {
            return SynthLabelUI.createUI(c);
        }
        else if (key == "ListUI") {
            return SynthListUI.createUI(c);
        }
        else if (key == "MenuBarUI") {
            return SynthMenuBarUI.createUI(c);
        }
        else if (key == "MenuUI") {
            return SynthMenuUI.createUI(c);
        }
        else if (key == "MenuItemUI") {
            return SynthMenuItemUI.createUI(c);
        }
        else if (key == "OptionPaneUI") {
            return SynthOptionPaneUI.createUI(c);
        }
        else if (key == "PanelUI") {
            return SynthPanelUI.createUI(c);
        }
        else if (key == "PasswordFieldUI") {
            return SynthPasswordFieldUI.createUI(c);
        }
        else if (key == "PopupMenuSeparatorUI") {
            return SynthSeparatorUI.createUI(c);
        }
        else if (key == "PopupMenuUI") {
            return SynthPopupMenuUI.createUI(c);
        }
        else if (key == "ProgressBarUI") {
            return SynthProgressBarUI.createUI(c);
        }
        else if (key == "RadioButtonUI") {
            return SynthRadioButtonUI.createUI(c);
        }
        else if (key == "RadioButtonMenuItemUI") {
            return SynthRadioButtonMenuItemUI.createUI(c);
        }
        else if (key == "RootPaneUI") {
            return SynthRootPaneUI.createUI(c);
        }
        else if (key == "ScrollBarUI") {
            return SynthScrollBarUI.createUI(c);
        }
        else if (key == "ScrollPaneUI") {
            return SynthScrollPaneUI.createUI(c);
        }
        else if (key == "SeparatorUI") {
            return SynthSeparatorUI.createUI(c);
        }
        else if (key == "SliderUI") {
            return SynthSliderUI.createUI(c);
        }
        else if (key == "SpinnerUI") {
            return SynthSpinnerUI.createUI(c);
        }
        else if (key == "SplitPaneUI") {
            return SynthSplitPaneUI.createUI(c);
        }
        else if (key == "TabbedPaneUI") {
            return SynthTabbedPaneUI.createUI(c);
        }
        else if (key == "TableUI") {
            return SynthTableUI.createUI(c);
        }
        else if (key == "TableHeaderUI") {
            return SynthTableHeaderUI.createUI(c);
        }
        else if (key == "TextAreaUI") {
            return SynthTextAreaUI.createUI(c);
        }
        else if (key == "TextFieldUI") {
            return SynthTextFieldUI.createUI(c);
        }
        else if (key == "TextPaneUI") {
            return SynthTextPaneUI.createUI(c);
        }
        else if (key == "ToggleButtonUI") {
            return SynthToggleButtonUI.createUI(c);
        }
        else if (key == "ToolBarSeparatorUI") {
            return SynthSeparatorUI.createUI(c);
        }
        else if (key == "ToolBarUI") {
            return SynthToolBarUI.createUI(c);
        }
        else if (key == "ToolTipUI") {
            return SynthToolTipUI.createUI(c);
        }
        else if (key == "TreeUI") {
            return SynthTreeUI.createUI(c);
        }
        else if (key == "ViewportUI") {
            return SynthViewportUI.createUI(c);
        }
        return null;
    }


    /**
     * Creates a SynthLookAndFeel.
     * <p>
     * For the returned <code>SynthLookAndFeel</code> to be useful you need to
     * invoke <code>load</code> to specify the set of
     * <code>SynthStyle</code>s, or invoke <code>setStyleFactory</code>.
     *
     * @see #load
     * @see #setStyleFactory
     */
    public SynthLookAndFeel() {
        factory = new DefaultSynthStyleFactory();
        _handler = new Handler();
    }

    /**
     * Loads the set of <code>SynthStyle</code>s that will be used by
     * this <code>SynthLookAndFeel</code>. <code>resourceBase</code> is
     * used to resolve any path based resources, for example an
     * <code>Image</code> would be resolved by
     * <code>resourceBase.getResource(path)</code>. Refer to
     * <a href="doc-files/synthFileFormat.html">Synth File Format</a>
     * for more information.
     *
     * @param input InputStream to load from
     * @param resourceBase used to resolve any images or other resources
     * @throws ParseException if there is an error in parsing
     * @throws IllegalArgumentException if input or resourceBase is <code>null</code>
     */
    public void load(InputStream input, Class<?> resourceBase) throws
                       ParseException {
        if (resourceBase == null) {
            throw new IllegalArgumentException(
                "You must supply a valid resource base Class");
        }

        if (defaultsMap == null) {
            defaultsMap = new HashMap();
        }
        
        new SynthParser().parse(input, (DefaultSynthStyleFactory) factory,
                                null, resourceBase, defaultsMap);
    }
    
    /**
     * Loads the set of <code>SynthStyle</code>s that will be used by
     * this <code>SynthLookAndFeel</code>. Path based resources are resolved
     * relatively to the specified <code>URL</code> of the style. For example
     * an <code>Image</code> would be resolved by
     * <code>new URL(synthFile, path)</code>. Refer to
     * <a href="doc-files/synthFileFormat.html">Synth File Format</a> for more
     * information.
     *
     * @param url the <code>URL</code> to load the set of
     *     <code>SynthStyle</code> from
     * @throws ParseException if there is an error in parsing
     * @throws IllegalArgumentException if synthSet is <code>null</code>
     * @throws IOException if synthSet cannot be opened as an <code>InputStream</code>
     * @since 1.6
     */
    public void load(URL url) throws ParseException, IOException {
        if (url == null) {
            throw new IllegalArgumentException(
                "You must supply a valid Synth set URL");
        }

        if (defaultsMap == null) {
            defaultsMap = new HashMap();
        }
        
        InputStream input = url.openStream();
        new SynthParser().parse(input, (DefaultSynthStyleFactory) factory,
                                url, null, defaultsMap);
    }

    /**
     * Called by UIManager when this look and feel is installed.
     */
    @Override
    public void initialize() {
        super.initialize();
        DefaultLookup.setDefaultLookup(new SynthDefaultLookup());
        setStyleFactory(factory);
        KeyboardFocusManager.getCurrentKeyboardFocusManager().
            addPropertyChangeListener(_handler);
    }

    /**
     * Called by UIManager when this look and feel is uninstalled.
     */
    @Override
    public void uninitialize() {
        KeyboardFocusManager.getCurrentKeyboardFocusManager().
            removePropertyChangeListener(_handler);
        // We should uninstall the StyleFactory here, but unfortunately
        // there are a handful of things that retain references to the
        // LookAndFeel and expect things to work
        super.uninitialize();
    }