/* * @(#)TestChart.java	1.3 04/01/27 * * Copyright (c) 2000-2004 Sun Microsystems, Inc. All rights reserved.  * PROPRIETARY/CONFIDENTIAL * Use is subject to license terms */package example.photoalbum;import java.util.Vector;import javax.microedition.midlet.*;import javax.microedition.lcdui.*;/** * 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;    /**     * 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;    }    /**     * 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;    }    /**     * 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, h2 = barSize / 2, 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);    }}