capturedevicebrowser.java

FMJ（freedom media for java)是java视频开发的新选择

package net.sf.fmj.ui.application;

import java.awt.Container;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.MediaLocator;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JPanel;

import net.sf.fmj.media.cdp.GlobalCaptureDevicePlugger;
import net.sf.fmj.utility.LoggerSingleton;

/**
 * 
 * @author Ken Larson
 *
 */
public class CaptureDeviceBrowser extends JPanel
{
	private static final Logger logger = LoggerSingleton.logger;

	private final JComboBox deviceComboBox;
	private final JButton okButton;
	private final JButton cancelButton;
	
	private boolean okClicked = false;
	
	public CaptureDeviceBrowser()
	{
		setLayout(new GridBagLayout());
		
		deviceComboBox = new JComboBox();
		deviceComboBox.setEditable(false);
//		deviceComboBox.addItemListener(new ItemListener(){
//
//			public void itemStateChanged(ItemEvent e)
//			{
//				if (e.getStateChange() == ItemEvent.SELECTED)
//				{
//					logger.fine("itemStateChanged: " + e.getItem());
//					if (e.getItem() != null)
//						okButton.setEnabled(true);
//				}
//				
//			}
//			
//		});
		
		GridBagConstraints c1 = new GridBagConstraints();
		c1.fill = GridBagConstraints.HORIZONTAL;
		c1.weightx = 1.0;
		c1.insets = new Insets(0, 2, 0, 2);
		this.add(deviceComboBox, c1);
		
		okButton = new JButton("OK");
		okButton.addActionListener(new ActionListener(){

			public void actionPerformed(ActionEvent e)
			{
				okClicked = true;
				closeDialog();
			}
			
		});
		GridBagConstraints c2 = new GridBagConstraints();
		c2.insets = new Insets(0, 2, 0, 2);
		add(okButton, c2);
		
		cancelButton = new JButton("Cancel");
		cancelButton.addActionListener(new ActionListener(){

			public void actionPerformed(ActionEvent e)
			{	closeDialog();
			}
			
		});
		add(cancelButton, c2);

		populate();
		
		okButton.setEnabled(!deviceComboBoxMap.isEmpty());
		
		this.setPreferredSize(new Dimension(300, 80));
		
		
	}
	
	private void closeDialog()
	{
		getParent().getParent().getParent().getParent().setVisible(false);
		((JDialog) getParent().getParent().getParent().getParent()).dispose();

	}
	
	private Map/*<Integer, MediaLocator>*/ deviceComboBoxMap = new HashMap/*<Integer, MediaLocator>*/();
	
	private void populate()
	{
		
		GlobalCaptureDevicePlugger.addCaptureDevices();	// TODO: this needs to be done globally somewhere.
		
		
		final java.util.Vector vectorDevices = CaptureDeviceManager.getDeviceList(null);
		if (vectorDevices == null || vectorDevices.size() == 0)
		{
			return;
		}

//		deviceComboBox.addItem("[None]");
//		deviceComboBoxMap.put(0, null);
		
		for ( int i = 0;  i < vectorDevices.size();  i++ ) 
		{
			CaptureDeviceInfo infoCaptureDevice = (CaptureDeviceInfo) vectorDevices.get(i);
			logger.fine("CaptureDeviceInfo: ");
			logger.fine(infoCaptureDevice.getName());
			logger.fine("" + infoCaptureDevice.getLocator());
			logger.fine("" + infoCaptureDevice.getFormats()[0]);

			deviceComboBox.addItem(infoCaptureDevice.getName());
			deviceComboBoxMap.put(new Integer(i), infoCaptureDevice.getLocator());
			
		}
	}
	
	public MediaLocator getSelectedMediaLocator()
	{
		int index = deviceComboBox.getSelectedIndex();
		if (index < 0)
			return null;
		return (MediaLocator) deviceComboBoxMap.get(new Integer(index));
	}
	
	public static MediaLocator run(Frame parent)
	{
		// TODO: parent of dialog?
		JDialog frame = new JDialog();
		frame.setTitle("Select Capture Device");
		frame.setModal(true);
		//frame.setSize(new Dimension(640, 480));
		//frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		Container contentPane = frame.getContentPane();
		CaptureDeviceBrowser panel = new CaptureDeviceBrowser();
		contentPane.add(panel);
		frame.pack();
		if (parent != null)
			frame.setLocationRelativeTo(parent);
		frame.setVisible(true);
		MediaLocator result = panel.okClicked ? panel.getSelectedMediaLocator() : null;
		return result;
	}
	
	public static void main(String[] args) {
		try {
			System.setProperty("com.apple.mrj.application.apple.menu.about.name", "CaptureDeviceBrowser");
			
			logger.fine("" + CaptureDeviceBrowser.run(null));
			System.exit(0);	// TODO: why does it not close by itself?
		}
		catch (Throwable t) {
			logger.log(Level.WARNING, "" + t, t);
		}
	}
}