createemptyimagedemo.java

FLASH SVG技术在手机上的实现

/*
 *
 * Copyright © 2007 Sun Microsystems, Inc. All rights reserved.
 * Use is subject to license terms.
 */
package com.sun.perseus.demo;

import javax.microedition.lcdui.*;
import javax.microedition.m2g.SVGImage;
import javax.microedition.m2g.ScalableGraphics;
import javax.microedition.midlet.*;

import org.w3c.dom.Document;
import org.w3c.dom.svg.SVGElement;
import org.w3c.dom.svg.SVGRGBColor;
import org.w3c.dom.svg.SVGRect;
import org.w3c.dom.svg.SVGSVGElement;


/**
 * Simple demo which creates an empty SVGImage, populates it with
 * a graphical content and then displays that content.
 */
public class CreateEmptyImageDemo extends MIDlet implements CommandListener {
    public static final String SVG_NAMESPACE_URI = "http://www.w3.org/2000/svg";
    private final Command exitCommand = new Command("Exit", Command.EXIT, 1);
    SVGImageCanvas svgCanvas = null;

    public CreateEmptyImageDemo() {
    }

    public void startApp() {
        if (svgCanvas == null) {
            System.err.print("Building SVGImage .... ");

            SVGImage svgImage = SVGImage.createEmptyImage(null);
            Document doc = svgImage.getDocument();
            SVGSVGElement svg = (SVGSVGElement)doc.getDocumentElement();

            // First, set the viewBox so that we can work in 
            // a 100 by 100 area.
            SVGRect vb = svg.createSVGRect();
            vb.setWidth(100);
            vb.setHeight(100);
            svg.setRectTrait("viewBox", vb);

            SVGElement r = (SVGElement)doc.createElementNS(SVG_NAMESPACE_URI, "rect");
            SVGRGBColor bkgColor = svg.createSVGRGBColor(99, 128, 147);
            r.setRGBColorTrait("fill", bkgColor);
            r.setFloatTrait("x", 25);
            r.setFloatTrait("y", 25);
            r.setFloatTrait("rx", 5);
            r.setFloatTrait("ry", 5);
            r.setFloatTrait("width", 50);
            r.setFloatTrait("height", 50);
            svg.appendChild(r);

            SVGElement c = (SVGElement)doc.createElementNS(SVG_NAMESPACE_URI, "circle");
            SVGRGBColor fgColor = svg.createSVGRGBColor(255, 255, 255);
            c.setRGBColorTrait("fill", fgColor);
            c.setFloatTrait("cx", 50);
            c.setFloatTrait("cy", 50);
            c.setFloatTrait("r", 20);
            svg.appendChild(c);

            System.err.println(" ... Done");

            svgCanvas = new SVGImageCanvas(svgImage);
            svgCanvas.addCommand(exitCommand);
            svgCanvas.setCommandListener(this);
        }

        Display.getDisplay(this).setCurrent(svgCanvas);
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }

    public void commandAction(Command c, Displayable d) {
        if (c == exitCommand) {
            destroyApp(false);
            notifyDestroyed();
        }
    }
}