metalutils.java

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

        // otherwise it's the height.
        private static final int IMAGE_SIZE = 64;

        /**
         * This is the actual width we're painting in, or last painted to.
         */
        private int w;
        /**
         * This is the actual height we're painting in, or last painted to
         */
        private int h;


        GradientPainter(int count) {
            super(count);
        }

        public void paint(Component c, Graphics2D g,
                          java.util.List gradient, int x, int y, int w,
                          int h, boolean isVertical) {
            int imageWidth;
            int imageHeight;
            if (isVertical) {
                imageWidth = IMAGE_SIZE;
                imageHeight = h;
            }
            else {
                imageWidth = w;
                imageHeight = IMAGE_SIZE;
            }
            synchronized(c.getTreeLock()) {
                this.w = w;
                this.h = h;
                paint(c, g, x, y, imageWidth, imageHeight,
                      gradient, isVertical);
            }
        }

        protected void paintToImage(Component c, Image image, Graphics g,
                                    int w, int h, Object[] args) {
            Graphics2D g2 = (Graphics2D)g;
            java.util.List gradient = (java.util.List)args[0];
            boolean isVertical = ((Boolean)args[1]).booleanValue();
            // Render to the VolatileImage
            if (isVertical) {
                drawVerticalGradient(g2,
                                     ((Number)gradient.get(0)).floatValue(),
                                     ((Number)gradient.get(1)).floatValue(),
                                     (Color)gradient.get(2),
                                     (Color)gradient.get(3),
                                     (Color)gradient.get(4), w, h);
            }
            else {
                drawHorizontalGradient(g2,
                                      ((Number)gradient.get(0)).floatValue(),
                                      ((Number)gradient.get(1)).floatValue(),
                                      (Color)gradient.get(2),
                                      (Color)gradient.get(3),
                                      (Color)gradient.get(4), w, h);
            }
        }

        protected void paintImage(Component c, Graphics g,
                                  int x, int y, int imageW, int imageH,
                                  Image image, Object[] args) {
            boolean isVertical = ((Boolean)args[1]).booleanValue();
            // Render to the screen
            g.translate(x, y);
            if (isVertical) {
                for (int counter = 0; counter < w; counter += IMAGE_SIZE) {
                    int tileSize = Math.min(IMAGE_SIZE, w - counter);
                    g.drawImage(image, counter, 0, counter + tileSize, h,
                                0, 0, tileSize, h, null);
                }
            }
            else {
                for (int counter = 0; counter < h; counter += IMAGE_SIZE) {
                    int tileSize = Math.min(IMAGE_SIZE, h - counter);
                    g.drawImage(image, 0, counter, w, counter + tileSize,
                                0, 0, w, tileSize, null);
                }
            }
            g.translate(-x, -y);
        }

        private void drawVerticalGradient(Graphics2D g, float ratio1,
                                          float ratio2, Color c1,Color c2,
                                          Color c3, int w, int h) {
            int mid = (int)(ratio1 * h);
            int mid2 = (int)(ratio2 * h);
            if (mid > 0) {
                g.setPaint(getGradient((float)0, (float)0, c1, (float)0,
                                       (float)mid, c2));
                g.fillRect(0, 0, w, mid);
            }
            if (mid2 > 0) {
                g.setColor(c2);
                g.fillRect(0, mid, w, mid2);
            }
            if (mid > 0) {
                g.setPaint(getGradient((float)0, (float)mid + mid2, c2,
                                       (float)0, (float)mid * 2 + mid2, c1));
                g.fillRect(0, mid + mid2, w, mid);
            }
            if (h - mid * 2 - mid2 > 0) {
                g.setPaint(getGradient((float)0, (float)mid * 2 + mid2, c1,
                                       (float)0, (float)h, c3));
                g.fillRect(0, mid * 2 + mid2, w, h - mid * 2 - mid2);
            }
        }

        private void drawHorizontalGradient(Graphics2D g, float ratio1,
                                            float ratio2, Color c1,Color c2,
                                            Color c3, int w, int h) {
            int mid = (int)(ratio1 * w);
            int mid2 = (int)(ratio2 * w);
            if (mid > 0) {
                g.setPaint(getGradient((float)0, (float)0, c1,
                                       (float)mid, (float)0, c2));
                g.fillRect(0, 0, mid, h);
            }
            if (mid2 > 0) {
                g.setColor(c2);
                g.fillRect(mid, 0, mid2, h);
            }
            if (mid > 0) {
                g.setPaint(getGradient((float)mid + mid2, (float)0, c2,
                                       (float)mid * 2 + mid2, (float)0, c1));
                g.fillRect(mid + mid2, 0, mid, h);
            }
            if (w - mid * 2 - mid2 > 0) {
                g.setPaint(getGradient((float)mid * 2 + mid2, (float)0, c1,
                                       w, (float)0, c3));
                g.fillRect(mid * 2 + mid2, 0, w - mid * 2 - mid2, h);
            }
        }

        private GradientPaint getGradient(float x1, float y1,
                                                 Color c1, float x2, float y2,
                                                 Color c2) {
            return new GradientPaint(x1, y1, c1, x2, y2, c2, true);
        }
    }


    /**
     * Returns true if the specified widget is in a toolbar.
     */
    static boolean isToolBarButton(JComponent c) {
        return (c.getParent() instanceof JToolBar);
    }

    static Icon getOceanToolBarIcon(Image i) {
	ImageProducer prod = new FilteredImageSource(i.getSource(),
                             new OceanToolBarImageFilter());
	return new ImageIconUIResource(Toolkit.getDefaultToolkit().createImage(prod));
    }

    static Icon getOceanDisabledButtonIcon(Image image) {
        Object[] range = (Object[])UIManager.get("Button.disabledGrayRange");
        int min = 180;
        int max = 215;
        if (range != null) {
            min = ((Integer)range[0]).intValue();
            max = ((Integer)range[1]).intValue();
        }
	ImageProducer prod = new FilteredImageSource(image.getSource(),
                      new OceanDisabledButtonImageFilter(min , max));
	return new ImageIconUIResource(Toolkit.getDefaultToolkit().createImage(prod));
    }




    /**
     * Used to create a disabled Icon with the ocean look.
     */
    private static class OceanDisabledButtonImageFilter extends RGBImageFilter{
        private float min;
        private float factor;

        OceanDisabledButtonImageFilter(int min, int max) {
            canFilterIndexColorModel = true;
            this.min = (float)min;
            this.factor = (max - min) / 255f;
        }
    
        public int filterRGB(int x, int y, int rgb) {
            // Coefficients are from the sRGB color space:
            int gray = Math.min(255, (int)(((0.2125f * ((rgb >> 16) & 0xFF)) +
                    (0.7154f * ((rgb >> 8) & 0xFF)) +
                    (0.0721f * (rgb & 0xFF)) + .5f) * factor + min));

            return (rgb & 0xff000000) | (gray << 16) | (gray << 8) |
                (gray << 0);
        }
    }


    /**
     * Used to create the rollover icons with the ocean look.
     */
    private static class OceanToolBarImageFilter extends RGBImageFilter {
        OceanToolBarImageFilter() {
            canFilterIndexColorModel = true;
        }
    
        public int filterRGB(int x, int y, int rgb) {
            int r = ((rgb >> 16) & 0xff);
            int g = ((rgb >> 8) & 0xff);
            int b = (rgb & 0xff);
            int gray = Math.max(Math.max(r, g), b);
            return (rgb & 0xff000000) | (gray << 16) | (gray << 8) |
                (gray << 0);
        }
    }
}