/* * * Copyright ? 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */package example.photoalbum;import java.util.Vector;import javax.microedition.lcdui.*;import javax.microedition.midlet.*;/** * A quick sample of graphics which generates a series of images * that can be used as a sample animation.  The animation * consists of a title, a pie, and a bar chart.  The charts * are sized to the requested size so they will look good on * devices with various screen sizes. */class TestChart {    /** Width of the canvas */    int w;    /** Height of the canvas */    int h;    /** Font used for drawing text */    Font font;    /** height of the font */    int fh;    /** Height of the title */    int titleHeight;    /** Padding used between items */    int pad;    /** Size of the Pie chart used for width and height */    int pieSize;    /** Size of the Bar chart used for width and height */    int barSize;    /** The current frame number */    int frameno;    /**     * Initialize a new TestPattern to match the requested size.     * @param width the requested width of the Images     * @param height the requested height of the Images     */    public TestChart(int width, int height) {        w = width;        h = height;        font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_SMALL);        fh = font.getHeight();        /*         * Compute the sizes of the bar and pie charts         * It should use all the space except for the title and event regions         * Don't let the charts get too small         */        pad = 2;        titleHeight = fh + (pad * 2);        barSize = h - (titleHeight + pad);        if (barSize < 10) { // Don't let them get too small            barSize = 10;        }        if (barSize > ((w - pad) / 2)) { // Shrink to 1/2 width            barSize = (w - pad) / 2;        }        pieSize = barSize;    }    /**     * Generate the frames for this animated chart.     * It consists of hour frames with the first frame     * containing only the base, and frame 2,3,4 adding     * the colors to the bars of the bar chart.     * @return the Vector of Images.     */    public Vector generateImages() {        Vector v = new Vector(4);        for (frameno = 0; frameno < 4; frameno++) {            Image image = Image.createImage(w, h);            paint(image.getGraphics());            v.addElement(image);        }        return v;    }    /**     * Draw the current frame.     * The field frameno contains the current frame number.     * @param g the Graphics context     */    public void paint(Graphics g) {        g.setFont(font);        g.setGrayScale(255);        g.fillRect(0, 0, w, h);        // Draw Fill and outline for background of title Text        int swidth = (pad * 2) + font.stringWidth("Chart Samples");        int title_x = (w - swidth) / 2;        g.setGrayScale(128);        g.fillRoundRect(title_x, 0, swidth, fh, 5, 5);        g.setGrayScale(0);        g.drawRoundRect(title_x, 0, swidth, fh, 5, 5);        // Sample Text        g.setColor(0, 0, 0);        g.drawString("Chart Samples", title_x + pad, pad, Graphics.TOP | Graphics.LEFT);        g.translate(0, titleHeight + pad); // Translate to below title text        // Draw pie chart on the left using the barSize for width and height        g.setColor(255, 0, 0);        g.fillArc(0, 0, pieSize, pieSize, 45, 270);        g.setColor(0, 255, 0);        g.fillArc(0, 0, pieSize, pieSize, 0, 45);        g.setColor(0, 0, 255);        g.fillArc(0, 0, pieSize, pieSize, 0, -45);        g.setColor(0);        g.drawArc(0, 0, pieSize, pieSize, 0, 360);        // Draw Bar chart on right side of the display        // scale the values to the pieSize maximum value        int yorig = barSize;        int h1 = barSize / 3;        int h2 = barSize / 2;        int h3 = barSize;        int avg = (h1 + h2 + h3) / 3;        // Move over to draw Bar chart        g.translate((w + pad) / 2, 0);        int bw = pieSize / 7;        if (bw < 2) {            bw = 2;        }        if (frameno > 0) {            g.setColor(255, 0, 0);            g.fillRect(bw * 1, yorig - h1, bw + 1, h1);        }        if (frameno > 1) {            g.setColor(0, 255, 0);            g.fillRect(bw * 3, yorig - h2, bw + 1, h2);        }        if (frameno > 2) {            g.setColor(0, 0, 255);            g.fillRect(bw * 5, yorig - h3, bw + 1, h3);        }        g.setColor(0);        g.drawRect(bw * 1, yorig - h1, bw, h1);        g.drawRect(bw * 3, yorig - h2, bw, h2);        g.drawRect(bw * 5, yorig - h3, bw, h3);        // Draw axis for bar chart.        g.setGrayScale(0);        g.drawLine(0, 0, 0, yorig);        g.drawLine(0, yorig, barSize, yorig);        g.setStrokeStyle(Graphics.DOTTED);        g.drawLine(0, yorig - avg, barSize, yorig - avg);        g.setStrokeStyle(Graphics.SOLID);        // Restore to left and move down        g.translate(-(w + pad) / 2, pieSize + pad);    }}