Code Barn Load A Gif Msg

posted 9 years ago

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import java.applet.* ;
import java.awt.* ;
    
public class LoadAGifMsg extends Applet 
{
    private Image theHorse ; 
    private Image theMoose ;
    private boolean showWaitMsg = true ; // will be set to false after image downloads
    
    public void init() 
    {
        // anything in here will run BEFORE the paint() method is called,
        // even if you call repaint() now inside init
    } // close init
    
    public void loadGraphics() 
    {
        // now load the graphics - this is like your "real" init
        theHorse = getImage( getCodeBase() , "horsenav.gif" );
        theMoose = getImage( getCodeBase() , "moosenav.gif" );
        MediaTracker mt = new MediaTracker( this );
        mt.addImage( theHorse , 0 );
        mt.addImage( theMoose , 1 );
    
        try 
        {
            mt.waitForAll();  // block here until images are downloaded
        }
        catch ( InterruptedException e ) 
        {
        }
    
        showWaitMsg = false ; // it is safe for paint to draw the image now
        repaint();
    } // close loadGraphics 
    
    public void paint( Graphics g ) 
    {
        // test a boolean to if the "loading" message should be displayed
        if ( showWaitMsg )
        {
            g.drawString( "Please wait... loading..." , 20 , 20 );
            loadGraphics(); // call the method that actually loads the graphics
        } 
        else
        {
            g.drawImage( theHorse , 25 , 25 , this );
            g.drawImage( theMoose , 25 , 130 , this );
        }
    } // close paint
} // close applet

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