Hi
Can you be more precise? Are you looking for a visual editor for GUI? In this case, Matisse (in Netbeans) and Window Builder (in Eclipse) might be interesting for you.
On the other hand, if you're rather looking for a canvas producing JOGL primitives from things drawn in a canvas, you will have to make it. You can use some parts of my source code (if you agree with the terms of the license), I have a plain AWT canvas that I modified to draw and save images, you can modify it in order to use the stored pixels to generate JOGL code, I use it in JFPSM. Best regards.