Page 198 - The Definitive Guide to Building Java Robots

Preston_5564C06.fm Page 179 Friday, September 23, 2005 5:13 AM

CHAPTER 6 ■ VISION 179

public class WebCamViewer extends SimpleSwing {
private Timer timer = new Timer();
private GetFrame getFrame;
private ImagePanel imagePanel;
private int fps = 15;
public static final String DEFAULT_CAMERA = "vfw://0";

public WebCamViewer() throws Exception {
init(DEFAULT_CAMERA);
}

public WebCamViewer(String camera) throws Exception{
init(camera);
}

private void init(String camera) throws Exception{
setTitle("WebCamViewer");
// creates frame grabber
getFrame = new GetFrame(camera);
int w = 320;
int h = 240;
imagePanel = new ImagePanel(w,h);
// set size of the window
setSize(w + 8, h+35);
// add imagePanel
getContentPane().add(imagePanel,BorderLayout.CENTER);
// make visible
setVisible(true);
}

// start the camera frame capture
public void start() {

timer.schedule(new TimerTask() {
public void run() {
getPic();
}
}, 200, (int)(1000 / fps));
}

// stop the camera frame capture
public void stop() throws Exception{
timer.cancel();
}