Move webcam viewer from examples to core, closes #89

webcam-capture/src/main/java/com/github/sarxos/webcam/WebcamViewer.java

@@ -0,0 +1,177 @@
+package com.github.sarxos.webcam;
+
+import java.awt.BorderLayout;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowListener;
+import java.lang.Thread.UncaughtExceptionHandler;
+
+import javax.swing.JFrame;
+import javax.swing.SwingUtilities;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+/**
+ * Just a simple webcam viewer.
+ * 
+ * @author Bartosz Firyn (SarXos)
+ */
+public class WebcamViewer extends JFrame implements Runnable, WebcamListener, WindowListener, UncaughtExceptionHandler, ItemListener {
+
+	private static final long serialVersionUID = 1L;
+
+	private static final Logger LOG = LoggerFactory.getLogger(WebcamViewer.class);
+
+	private Webcam webcam = null;
+	private WebcamPanel panel = null;
+	private WebcamPicker picker = null;
+
+	public WebcamViewer() {
+		SwingUtilities.invokeLater(this);
+	}
+
+	@Override
+	public void run() {
+
+		setTitle("Webcam Capture Viewer");
+		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		setLayout(new BorderLayout());
+
+		addWindowListener(this);
+
+		picker = new WebcamPicker();
+		picker.addItemListener(this);
+
+		webcam = picker.getSelectedWebcam();
+
+		if (webcam == null) {
+			LOG.error("No webcams found");
+			System.exit(1);
+		}
+
+		webcam.setViewSize(WebcamResolution.VGA.getSize());
+		webcam.addWebcamListener(WebcamViewer.this);
+
+		panel = new WebcamPanel(webcam, false);
+		panel.setFPSDisplayed(true);
+
+		add(picker, BorderLayout.NORTH);
+		add(panel, BorderLayout.CENTER);
+
+		pack();
+		setVisible(true);
+
+		Thread t = new Thread() {
+
+			@Override
+			public void run() {
+				panel.start();
+			}
+		};
+		t.setDaemon(true);
+		t.setUncaughtExceptionHandler(this);
+		t.start();
+	}
+
+	@Override
+	public void webcamOpen(WebcamEvent we) {
+		LOG.info("Webcam open");
+	}
+
+	@Override
+	public void webcamClosed(WebcamEvent we) {
+		LOG.info("Webcam closed");
+	}
+
+	@Override
+	public void webcamDisposed(WebcamEvent we) {
+		LOG.info("Webcam disposed");
+	}
+
+	@Override
+	public void webcamImageObtained(WebcamEvent we) {
+		// do nothing
+	}
+
+	@Override
+	public void windowActivated(WindowEvent e) {
+	}
+
+	@Override
+	public void windowClosed(WindowEvent e) {
+		webcam.close();
+	}
+
+	@Override
+	public void windowClosing(WindowEvent e) {
+	}
+
+	@Override
+	public void windowOpened(WindowEvent e) {
+	}
+
+	@Override
+	public void windowDeactivated(WindowEvent e) {
+	}
+
+	@Override
+	public void windowDeiconified(WindowEvent e) {
+		LOG.info("Webcam viewer resumed");
+		panel.resume();
+	}
+
+	@Override
+	public void windowIconified(WindowEvent e) {
+		LOG.info("Webcam viewer paused");
+		panel.pause();
+	}
+
+	@Override
+	public void uncaughtException(Thread t, Throwable e) {
+		LOG.error(String.format("Exception in thread %s", t.getName()), e);
+	}
+
+	@Override
+	public void itemStateChanged(ItemEvent e) {
+
+		if (e.getItem() == webcam) {
+			return;
+		}
+
+		if (webcam == null) {
+			return;
+		}
+
+		final WebcamPanel tmp = panel;
+
+		remove(panel);
+
+		webcam.removeWebcamListener(this);
+
+		webcam = (Webcam) e.getItem();
+		webcam.setViewSize(WebcamResolution.VGA.getSize());
+		webcam.addWebcamListener(this);
+
+		System.out.println("selected " + webcam.getName());
+
+		panel = new WebcamPanel(webcam, false);
+
+		add(panel, BorderLayout.CENTER);
+
+		Thread t = new Thread() {
+
+			@Override
+			public void run() {
+				tmp.stop();
+				panel.start();
+			}
+		};
+		t.setDaemon(true);
+		t.setUncaughtExceptionHandler(this);
+		t.start();
+
+	}
+}