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ImageJ Applet problem running my code and opening images

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thehobbit

Nov 13, 2012; 12:21pm

ImageJ Applet problem running my code and opening images

6 posts

Hello everyone,

I'm trying to run my JAVA code as an applet using also ImageJ API, but it doesn't work.
I even have problem showing a simple image. Here is an example:

public class ImageJApplet extends Applet {

/** Starts ImageJ if it's not already running. */
public void init() {
ImageJ ij = IJ.getInstance();
if (ij==null || (ij!=null && !ij.isShowing()))
new ImageJ(this);

ImagePlus imp = new ImagePlus("http://osasapere.it/wp-content/uploads/2011/06/dna_500.jpg");

imp.show();

}

public void destroy() {
ImageJ ij = IJ.getInstance();
if (ij!=null) ij.quit();
}

}

The main istance of imageJ starts, but the image does not start at all.
I have more code to run as an applet, like:

SelectionTool st = new SelectionTool();
st.run("");

This code, for example, shows some JAVA button I made which run some imageJ API and so on, and it works when I run it in Eclipse, but fails to start as an applet.

A "funny" thing I noticed is this: when I try to use this applet http://rsb.info.nih.gov/ij/applet2/ it does not show the images passed as parameters as it says, but starts only the main instance of imageJ.
So, I don't know if the problem is my browser; I use Chrome.

Can someone help me please?

Thank you in advance

thehobbit

Nov 13, 2012; 1:00pm

Re: ImageJ Applet problem running my code and opening images

6 posts

This post was updated on Nov 13, 2012; 1:38pm.

Sorry, I forgot to post the html code I use to run the applet, if it can help:

<html>
<head>
<title>ImageJA Applet</title>
</head>
<body bgcolor=gray>

<h1>ImageJ embedded in a website</h1>

<applet codebase="."
	code="ij.ImageJApplet.class" archive="ij.jar"
	width=750 height=550
	security=all-permissions>
<param name=url1 value=images/danbo1.jpg>
<param name=url2 value=images/danbo2.jpg>
</applet>

</body>
</html>


or also this:

<!DOCTYPE html>
<html>
<body>
<APPLET code=ij.ImageJApplet.class width=750 height=550 archive="ij.jar">
<PARAM NAME="code" VALUE="ij.ImageJApplet.class">
<PARAM NAME="width" VALUE="750">
<PARAM NAME="height" VALUE="550">
<PARAM NAME="archive" VALUE="ij.jar">
</APPLET>
</body>
</html>

Rasband, Wayne (NIH/NIMH) [E]

Nov 13, 2012; 5:49pm

Re: ImageJ Applet problem running my code and opening images

1064 posts

In reply to this post by thehobbit

On Nov 13, 2012, at 7:21 AM, thehobbit wrote:

> Hello everyone,
>
> I'm trying to run my JAVA code as an applet using also ImageJ API, but it
> doesn't work.

The ImageJ 1.47f daily build fixes a v1.46f regression that caused the ImageJ class (when running as an applet) to throw an exception. This caused code in ImageJApplet that opened images to be ignored.

-wayne

> I even have problem showing a simple image. Here is an example:
>
> public class ImageJApplet extends Applet {
>
> /** Starts ImageJ if it's not already running. */
> public void init() {
> ImageJ ij = IJ.getInstance();
> if (ij==null || (ij!=null && !ij.isShowing()))
> new ImageJ(this);
>
> ImagePlus imp = new
> ImagePlus("http://osasapere.it/wp-content/uploads/2011/06/dna_500.jpg");
>
> imp.show();
>
> }
>
> public void destroy() {
> ImageJ ij = IJ.getInstance();
> if (ij!=null) ij.quit();
> }
>
> }
>
> The main istance of imageJ starts, but the image does not start at all.
> I have more code to run as an applet, like:
>
> SelectionTool st = new SelectionTool();
> st.run("");
>
> This code, for example, shows some JAVA button I made which run some imageJ
> API and so on, and it works when I run it in Eclipse, but fails to start as
> an applet.
>
> A "funny" thing I noticed is this: when I try to use this applet
> http://rsb.info.nih.gov/ij/applet2/ it does not show the images passed as
> parameters as it says, but starts only the main instance of imageJ.
> So, I don't know if the problem is my browser; I use Chrome.
>
> Can someone help me please?
>
> Thank you in advance
>
>
>
> --
> View this message in context: http://imagej.1557.n6.nabble.com/ImageJ-Applet-problem-running-my-code-and-opening-images-tp5000786.html
> Sent from the ImageJ mailing list archive at Nabble.com.
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html

... [show rest of quote]

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html