nimbuslookandfeel.java

来自「Mobile 应用程序使用 Java Micro Edition (Java M」· Java 代码 · 共 503 行 · 第 1/2 页

     * UIDefaults table. The key for each property, state, painter, and other
     * default registered in UIDefaults for a specific Region will begin with
     * the specified <code>prefix</code></p>
     * 
     * <p>For example, suppose I had a component named JFoo. Suppose I then registered
     * this component with the NimbusLookAndFeel in this manner:</p>
     * 
     * <pre><code>
     *     laf.register(NimbusFooUI.FOO_REGION, "Foo");
     * </code></pre>
     * 
     * <p>In this case, I could then register properties for this component with
     * UIDefaults in the following manner:</p>
     * 
     * <pre><code>
     *     UIManager.put("Foo.background", new ColorUIResource(Color.BLACK));
     *     UIManager.put("Foo.Enabled.backgroundPainter", new FooBackgroundPainter());
     * </code></pre>
     * 
     * <p>It is also possible to register a named component with Nimbus. 
     * For example, suppose you wanted to style the background of a JPanel
     * named "MyPanel" differently from other JPanels. You could accomplish this
     * by doing the following:</p>
     * 
     * <pre><code>
     *     laf.register(Region.PANEL, "\"MyPanel\"");
     *     UIManager.put("\"MyPanel\".background", new ColorUIResource(Color.RED));
     * </code></pre>
     * 
     * @param region The Synth Region that is being registered. Such as Button, or
     *        ScrollBarThumb, or NimbusFooUI.FOO_REGION.
     * @param prefix The UIDefault prefix. For example, could be ComboBox, or if
     *        a named components, "MyComboBox", or even something like
     *        ToolBar."MyComboBox"."ComboBox.arrowButton"
     */
    public void register(Region region, String prefix) {
        defaults.register(region, prefix);
    }
    
    /**
     * Simple utility method that reads system keys.
     */
    private String getSystemProperty(String key) {
        return AccessController.doPrivileged(new GetPropertyAction(key));
    }

    @Override
    public Icon getDisabledIcon(JComponent component, Icon icon) {
        if (icon instanceof SynthIcon) {
            SynthIcon si = (SynthIcon)icon;
            BufferedImage img = EffectUtils.createCompatibleTranslucentImage(
                    si.getIconWidth(), si.getIconHeight());
            Graphics2D gfx = img.createGraphics();
            si.paintIcon(component, gfx, 0, 0);
            gfx.dispose();
            return new ImageIconUIResource(GrayFilter.createDisabledImage(img));
        } else {
            return super.getDisabledIcon(component, icon);
        }
    }
    
    /**
     * Get a derived color, derived colors are shared instances and is color
     * value will change when its parent UIDefault color changes.
     *
     * @param uiDefaultParentName The parent UIDefault key
     * @param hOffset             The hue offset
     * @param sOffset             The saturation offset
     * @param bOffset             The brightness offset
     * @param aOffset             The alpha offset
     * @param uiResource          True if the derived color should be a
     *                            UIResource, false if it should not be
     * @return The stored derived color
     */
    public Color getDerivedColor(String uiDefaultParentName,
                                 float hOffset, float sOffset,
                                 float bOffset, int aOffset,
                                 boolean uiResource) {
        return defaults.getDerivedColor(uiDefaultParentName, hOffset, sOffset,
                bOffset, aOffset, uiResource);
    }

    /**
     * Decodes and returns a color, which is derived from an offset between two
     * other colors.
     *
     * @param color1   The first color
     * @param color2   The second color
     * @param midPoint The offset between color 1 and color 2, a value of 0.0 is
     *                 color 1 and 1.0 is color 2;
     * @param uiResource True if the derived color should be a UIResource
     * @return The derived color
     */
    protected final Color getDerivedColor(Color color1, Color color2,
                                      float midPoint, boolean uiResource) {
        int argb = deriveARGB(color1, color2, midPoint);
        if (uiResource) {
            return new ColorUIResource(argb);
        } else {
            return new Color(argb);
        }
    }

    /**
     * Decodes and returns a color, which is derived from a offset between two
     * other colors.
     *
     * @param color1   The first color
     * @param color2   The second color
     * @param midPoint The offset between color 1 and color 2, a value of 0.0 is
     *                 color 1 and 1.0 is color 2;
     * @return The derived color, which will be a UIResource
     */
    protected final Color getDerivedColor(Color color1, Color color2,
                                      float midPoint) {
        return getDerivedColor(color1, color2, midPoint, true);
    }

    /**
     * Package private method which returns either BorderLayout.NORTH,
     * BorderLayout.SOUTH, BorderLayout.EAST, or BorderLayout.WEST depending
     * on the location of the toolbar in its parent. The toolbar might be
     * in PAGE_START, PAGE_END, CENTER, or some other position, but will be
     * resolved to either NORTH,SOUTH,EAST, or WEST based on where the toolbar
     * actually IS, with CENTER being NORTH.
     * 
     * This code is used to determine where the border line should be drawn
     * by the custom toolbar states, and also used by NimbusIcon to determine
     * whether the handle icon needs to be shifted to look correct.
     * 
     * Toollbars are unfortunately odd in the way these things are handled,
     * and so this code exists to unify the logic related to toolbars so it can
     * be shared among the static files such as NimbusIcon and generated files
     * such as the ToolBar state classes.
     */
    static Object resolveToolbarConstraint(JToolBar toolbar) {
        //NOTE: we don't worry about component orientation or PAGE_END etc
        //because the BasicToolBarUI always uses an absolute position of
        //NORTH/SOUTH/EAST/WEST.
        if (toolbar != null) {
            Container parent = toolbar.getParent();
            if (parent != null) {
                LayoutManager m = parent.getLayout();
                if (m instanceof BorderLayout) {
                    BorderLayout b = (BorderLayout)m;
                    Object con = b.getConstraints(toolbar);
                    if (con == SOUTH || con == EAST || con == WEST) {
                        return con;
                    }
                    return NORTH;
                }
            }
        }
        return NORTH;
    }
    
    /**
     * Derives the ARGB value for a color based on an offset between two
     * other colors.
     *
     * @param color1   The first color
     * @param color2   The second color
     * @param midPoint The offset between color 1 and color 2, a value of 0.0 is
     *                 color 1 and 1.0 is color 2;
     * @return the ARGB value for a new color based on this derivation
     */
    static int deriveARGB(Color color1, Color color2, float midPoint) {
        int r = color1.getRed() +
                (int) ((color2.getRed() - color1.getRed()) * midPoint + 0.5f);
        int g = color1.getGreen() +
                (int) ((color2.getGreen() - color1.getGreen()) * midPoint +
                        0.5f);
        int b = color1.getBlue() +
                (int) ((color2.getBlue() - color1.getBlue()) * midPoint + 0.5f);
        int a = color1.getAlpha() +
                (int) ((color2.getAlpha() - color1.getAlpha()) * midPoint +
                        0.5f);
        return ((a & 0xFF) << 24) |
                ((r & 0xFF) << 16) |
                ((g & 0xFF) << 8) |
                (b & 0xFF);
    }
    
    /**
     * Simple Symbolic Link style UIDefalts Property
     */
    private class LinkProperty implements UIDefaults.ActiveValue, UIResource{
        private String dstPropName;

        private LinkProperty(String dstPropName) {
            this.dstPropName = dstPropName;
        }

        @Override
        public Object createValue(UIDefaults table) {
            return UIManager.get(dstPropName);
        }
    }

    /**
     * Nimbus Property that looks up Nimbus keys for standard key names. For
     * example "Button.background" --> "Button[Enabled].backgound"
     */
    private class NimbusProperty implements UIDefaults.ActiveValue, UIResource {
        private String prefix;
        private String state = null;
        private String suffix;
        private boolean isFont;

        private NimbusProperty(String prefix, String suffix) {
            this.prefix = prefix;
            this.suffix = suffix;
            isFont = "font".equals(suffix);
        }

        private NimbusProperty(String prefix, String state, String suffix) {
            this(prefix,suffix);
            this.state = state;
        }

        /**
         * Creates the value retrieved from the <code>UIDefaults</code> table.
         * The object is created each time it is accessed.
         *
         * @param table a <code>UIDefaults</code> table
         * @return the created <code>Object</code>
         */
        @Override
        public Object createValue(UIDefaults table) {
            Object obj = null;
            // check specified state
            if (state!=null){
                obj = uiDefaults.get(prefix+"["+state+"]."+suffix);
            }
            // check enabled state
            if (obj==null){
                obj = uiDefaults.get(prefix+"[Enabled]."+suffix);
            }
            // check for defaults
            if (obj==null){
                if (isFont) {
                    obj = uiDefaults.get("defaultFont");
                } else {
                    obj = uiDefaults.get(suffix);
                }
            }
            return obj;
        }
    }
}