/**
* Creates new webcam panel which display image from camera in you your
* Swing application. If panel size argument is null, then image size will
* be used. If you would like to fill panel area with image even if its size
* is different, then you can use {@link #setFillArea(boolean)) method to
* configure this.
*
* @param webcam the webcam to be used to fetch images
* @param size the size of panel
* @param start true if webcam shall be automatically started
* @see WebcamPanel#setFillArea(boolean)
*/
public WebcamPanel(Webcam webcam, Dimension size, boolean start) {
if (webcam == null) {
throw new IllegalArgumentException(
String.format(
"Webcam argument in %s constructor cannot be null!", getClass().getSimpleName()));
}
this.webcam = webcam;
this.webcam.addWebcamListener(this);
repainter.setName(String.format("%s-repainter", webcam.getName()));
if (size == null) {
setPreferredSize(webcam.getViewSize());
} else {
setPreferredSize(size);
}
if (start) {
if (!webcam.isOpen()) {
webcam.open();
}
repainter.start();
}
}
@Override
public void webcamClosed(WebcamEvent we) {
if (repainter != null) {
if (repainter.isAlive()) {
try {
repainter.join(1000);
} catch (InterruptedException e) {
throw new WebcamException("Thread interrupted", e);
}
}
repainter = null;
}
}
@Override
public void webcamOpen(WebcamEvent we) {
if (repainter == null) {
repainter = new Repainter();
repainter.start();
}
setPreferredSize(webcam.getViewSize());
}
/** Open webcam and start rendering. */
public void start() {
if (started.compareAndSet(false, true)) {
starting = true;
if (repainter == null) {
repainter = new Repainter();
}
repainter.start();
webcam.open();
starting = false;
}
}