How to reach a document.images.<image> object from an Applet?

Anders · Oct 14, 2003

Dear all,

I would like to be able to manipulate an image contained in a website using
an Applet. In order to do so I have to get the image inside the Applet.

My idea is to expose a public method in my Applet which is called when the
web page is loaded (i.e. onLoad)
The following is some pseudo code explaining what I'd like to do. If this is
at all possible, what type should the parameter for the passImage method
have and what properties for the document.images.picture should I send?

The image format could be of any common type (i.e. .gif, .jpg and maybe some
more)

Thanks,
/Anders
___________________________________________________
1. Java class:

[...]

public class AppletTest extends Applet{

private SomeImageClass myImage;

[...]

public void passImage(SomeImageClass myImage){
this.image = myImage;
}
}

2. HTML file:
<html>

[...]

<img name=picture src=picture.gif>
<applet name=TestApplet code=TestApplet.class width=1 height=1</applet>
<body
onLoad="document.TestApplet.passImage(document.images.picture.???)>
[...]
</body>
</html>

Scooby Ced · Oct 15, 2003

Anders said:
Dear all,

I would like to be able to manipulate an image contained in a website using
an Applet. In order to do so I have to get the image inside the Applet.

I suggest you to use the URL object:
<snipplet>
URL url;
Image img;
MediatTracker mt=new MediaTracker(this); // 'this' refers to the (J)Applet
object
Toolkit tk=this.getToolkit(); // 'this' refers to the (J)Applet object
try {
url=new URL("http","127.0.0.1","/foo/images/myImage.gif");
img=tk.getImage(url);
mt.addImage(img,0);
} catch(MalformedUrlException mue) {
System.err.println("Malformed URL");
}
mt.waitForID(0);
</snipplet>

Anders · Oct 15, 2003

Scooby Ced said:
I suggest you to use the URL object:
<snipplet>
URL url;
Image img;
MediatTracker mt=new MediaTracker(this); // 'this' refers to the (J)Applet
object
Toolkit tk=this.getToolkit(); // 'this' refers to the (J)Applet object
try {
url=new URL("http","127.0.0.1","/foo/images/myImage.gif");
img=tk.getImage(url);
mt.addImage(img,0);
} catch(MalformedUrlException mue) {
System.err.println("Malformed URL");
}
mt.waitForID(0);
</snipplet>

Thanks.

I see what you mean, but this will not work in my situation. I guess I was a
bit unclear reagarding the details. The image I'd like to manipulate in the
Applet is never stored on the server, but it is produced on-the-fly by a
servlet. Probably I could just transfer the image data from the servlet to
the applet but to do so in a robust way I guess this data has to be
serializeble; meaning not a compact form like gif or jpeg files.

Any more ideas? please.

Regards,
/Anders

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How to reach a document.images.<image> object from an Applet?

Anders

Scooby Ced

Anders

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