在基于JMF的视频播放器上使用绘制的图像叠加JFrame

时间:2012-02-28 06:10:01

标签: java jframe awt jmf

我正在构建一个交通模拟器,通过制作应该与交通灯模拟器交互的视频播放器,我需要将交通信号灯的帧插入到从机器播放的视频上。我刚刚使用JPanel将交通信号灯吸引到框架上,并确保在初始化播放器后创建框架。但问题是,在执行各种setAlwaysOnTop()或toFront()方法后,它们仍然不会叠加在一起。我希望框架在一段时间后通过视频播放器然后消失。但是一旦加载了帧,它就会使视频最小化。请帮帮我。

以下是代码。

class MediaPlayer extends Frame implements ActionListener,ControllerListener,ItemListener
{

    Player player;
    Component vc, cc;
    Graphics2D traffic;
    int x,y,w,h;
    Time boss = new Time(0);
    //  boolean first = false, loop = false;

    MediaPlayer (String title) throws IOException
    {
        super (title);
        toFront();
        GraphicsEnvironment graphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice[] devices = graphicsEnvironment.getScreenDevices();
        if (devices[0].isFullScreenSupported()) {
            setUndecorated(true);
            setVisible (true);
            Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
            x = (5*screenSize.width)/8;
            y = screenSize.height/2;
            w = 35;
            h = 50;
            setSize(screenSize);
            devices[0].setFullScreenWindow(this);
            validate();
            if (player != null)
                player.close ();

            try
            {
                player = Manager.createPlayer (new MediaLocator ("file:C:\\Documents and Settings\\User\\My Documents\\Downloads\\Fig21_06_07\\Fig21_06_07\\bailey.mpg"));
                if (player == null)
                {
                    System.out.println ("Trouble creating a player.");
                    return;
                }
                player.addControllerListener (this);
                System.out.println("asking for prefetch");
                player.prefetch ();
                setSize(screenSize);
                toFront();
                boolean flag = true;
                Time initial = player.getMediaTime(); 
                do {//  
                    JFrame frame = new JFrame();
                    setAlwaysOnTop(true);
                    frame.setAlwaysOnTop(true);
                    frame.toBack();

                    int he = 50, wi = 35;
                    //int x = 400, y = 400;
                    frame.setUndecorated(true);
                    frame.setVisible(true);
                    frame.setAlwaysOnTop(true);
                    frame.setLocation(x,y); 
                    frame.setSize(wi,he);
                    frame.setResizable(false);
                    ShapesJPanel tr = new ShapesJPanel();
                    tr.setSize(100,100);
                    tr.setBounds(0, 0,100,100);
                    tr.setBackground(Color.MAGENTA);
                    tr.x = 0;
                    tr.y = 0;
                    tr.w = 100;                     
                                        tr.h1 = 100;
                    frame.add(tr);
                    validate();
                    pack();
                    frame.setVisible(true);
                    setVisible(true);
                    toFront();
                    x = (5*screenSize.width)/8;
                    y = screenSize.height/2;
                    w = 15;
                    h = 20;
                    setSize(screenSize);
                    boss = initial;
                    long start = System.currentTimeMillis();
                    int i = 0;
                    while (System.currentTimeMillis()-start < 5000)
                    {
                    }
                    Time blah = player.getMediaTime();
                    boss = blah;
                    player.stop();
                    long restart = System.currentTimeMillis();
                    while (System.currentTimeMillis()-restart < 5000)
                    {
                    }
                    boss = initial;
                    player.setMediaTime (blah);
                    player.start();
                    start = System.currentTimeMillis();
                    while (System.currentTimeMillis()-start < 5000)
                    {
                    }
                    player.setMediaTime (initial);
                    player.prefetch();
                    setSize(screenSize);
                    flag = false;
                }while(true);
            }
            catch (java.io.IOException e2)
            {
                System.out.println (e2);
                return;
            }
            catch (NoPlayerException e2)
            {
                System.out.println ("Could not find a player.");
                return;
            }
        }
        else {
            pack();
            setVisible(true);
        }
    }

    public void actionPerformed (ActionEvent e)
    {
    }

    public void controllerUpdate (ControllerEvent e)
    {
        // A ControllerClosedEvent is posted when player.close is
        // called.  If there is a visual component, this component must
        // be removed.  Otherwise, this visual component appears
        // blanked out on the screen. (To be consistent, we do the same
        // thing for the control panel component.)
        //
        // Note: This problem occurs when run under JMF 2.1 Windows and
        //       SDK 1.3 on a Windows 98 SE platform.

        if (e instanceof ControllerClosedEvent)
        { 
            if (vc != null)
            {
                remove (vc);
                vc = null;
            }

            if (cc != null)
            {
                remove (cc);
                cc = null;
            }

            return;
        }

        if (e instanceof EndOfMediaEvent)
        {
            player.setMediaTime(new Time(0));
            player.start();
            return;
        }

        if (e instanceof PrefetchCompleteEvent)
        {
            System.out.println("Prefetch occured..");
            player.start ();
            Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
            player.getVisualComponent().setSize(screenSize.width, screenSize.height);
            player.getVisualComponent().setMinimumSize(screenSize);
            player.getVisualComponent().setBounds(0, 0, screenSize.width, screenSize.height);
            return;
        }

        if (e instanceof RealizeCompleteEvent)
        {
            System.out.println("player realized..");
            vc = player.getVisualComponent ();

            if (vc != null){
                Dimension screenSize = Toolkit.getDefaultToolkit(). getScreenSize();
                vc.setMinimumSize(screenSize);
                vc.setBounds(0, 0, screenSize.width, screenSize.height);
                add (vc); 
            }
            pack ();

        }

    }

    public void itemStateChanged (ItemEvent e)
    {

    }

    public void paint (Graphics g)
    {
        super.paint (g);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        int wi = screenSize.width;
        int he = screenSize.height;
        g.setColor (Color.black);
        g.fillRect (0, 0, wi, he);
        // Call overridden Frame superclass paint method.  That method
        // will call each contained container and component (including
        // the control panel component) paint method.
    }

    // Eliminate control panel component flicker by preventing frame
    // background from being cleared.

    public void update (Graphics g)
    {
        paint (g);
    }

    public static void main (String [] args) throws IOException
    {
        new MediaPlayer ("Road Simulator");
    }
}

0 个答案:

没有答案