125 lines
2.8 KiB
Java
125 lines
2.8 KiB
Java
Demonstrating the Java Media Player
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import java.awt.*;
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import java.awt.event.*;
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import java.io.*;
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import javax.swing.*;
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import javax.media.*;
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public class MediaPlayerDemo extends JFrame
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{
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private Player player;
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private File file;
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public MediaPlayerDemo()
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{
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super( "Demonstrating the Java Media Player" );
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JButton openFile = new JButton( "Open file to play" );
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openFile.addActionListener( new ActionListener()
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{
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public void actionPerformed( ActionEvent e )
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{
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openFile();
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createPlayer();
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}
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});
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getContentPane().add( openFile, BorderLayout.NORTH );
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setSize( 300, 300 );
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show();
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}
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private void openFile()
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{
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JFileChooser fileChooser = new JFileChooser();
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fileChooser.setFileSelectionMode( JFileChooser.FILES_ONLY );
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int result = fileChooser.showOpenDialog( this );
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// user clicked Cancel button on dialog
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if ( result == JFileChooser.CANCEL_OPTION )
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file = null;
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else
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file = fileChooser.getSelectedFile();
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}
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private void createPlayer()
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{
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if ( file == null )
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return;
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removePreviousPlayer();
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try
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{
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// create a new player and add listener
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player = Manager.createPlayer( file.toURL() );
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player.addControllerListener( new EventHandler() );
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player.start(); // start player
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}
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catch ( Exception e )
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{
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JOptionPane.showMessageDialog( this, "Invalid file or location", "Error loading file",
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JOptionPane.ERROR_MESSAGE );
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}
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}
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private void removePreviousPlayer()
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{
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if ( player == null )
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return;
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player.close();
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Component visual = player.getVisualComponent();
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Component control = player.getControlPanelComponent();
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Container c = getContentPane();
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if ( visual != null )
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c.remove( visual );
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if ( control != null )
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c.remove( control );
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}
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public static void main(String args[])
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{
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MediaPlayerDemo app = new MediaPlayerDemo();
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app.addWindowListener( new WindowAdapter()
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{
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public void windowClosing( WindowEvent e )
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{
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System.exit(0);
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}
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});
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}
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// inner class to handler events from media player
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private class EventHandler implements ControllerListener
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{
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public void controllerUpdate( ControllerEvent e )
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{
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if ( e instanceof RealizeCompleteEvent )
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{
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Container c = getContentPane();
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// load Visual and Control components if they exist
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Component visualComponent = player.getVisualComponent();
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if ( visualComponent != null )
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c.add( visualComponent, BorderLayout.CENTER );
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Component controlsComponent = player.getControlPanelComponent();
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if ( controlsComponent != null )
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c.add( controlsComponent, BorderLayout.SOUTH );
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c.doLayout();
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}
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}
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}
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}
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