asked on

Loading images from the Constructor of a Component

hi,
when i try to load images from the constructor of a component, images are not loaded. i think the imageproducer not loaded at the moment the constructor called and while its in execution. so from which method should i load images. currently i'm loading from paint() like,

public void paint( Graphics g )
{
if ( img1 == null)
{
img1 = getToolkit().getImage( "theimg.gif" );
while ( getToolkit().prepareImage( img1, -1, -1, this ) ) ;
}

g.drawImage( img1, 0, 0, 50, 50, this );

}

imho its not staight forward and i'm looking for the real solution.
thanks.

heyhey_

you can't load Images BEFORE your component has peer (that is before addNotify() is called).

you can try using
Toolkit.getDefaultToolkit().getImage()

omavideniz

ASKER

so how can i determine if peer loaded. would be it be right to load image from addNotify() method?

llaurick

I have designed a class that loads an Image from the jar of the applet. It can be used anywhere in your code as it uses a static method. Here it is:

public class ResourceLoader
{
/**
* Returns an Image from the applet's jar.
*/
public static Image getJarImage(String name)
{
Image image = null;
InputStream in = null;
MediaTracker mt = new MediaTracker(new Panel());

try {
in = Class.forNam ("ResourceLoader").getResourceAsStream(name);
if (in == null)
{
System.out.printl ("Image '"+name+"' not found.");
return null;
}

byte[] buffer = new byte[in.available()];
in.read(buffer);
in.close();
image = Toolkit.getDefaultToolkit().createImage(buffer);
mt.addImage(image, 1);
mt.waitForAll(10000);
} catch(Exception e) {
e.printStackTrace();
} finally {
try {
in.close();
} catch(Exception e) {}
}

return image;
}
}

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heyhey_

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amp072397

omavideniz:

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