Posted by scott+jogamp@vorthmann.org on Jan 26, 2023; 4:50am
URL: https://forum.jogamp.org/reshape-not-called-in-2nd-GLCanvas-tp4042121.html

I have two GLCanvas instances, both created in the constructor of my JFrame subclass.  Each gets its own GLEventListener attached; both GLEventListener instances are made from the same GLEventListener subclass.

On startup, the reshape() method is called on both GLEventListeners, so I know everything is hooked up.  (It is a little hard to tell the calls apart from the stack trace, but the height and width arguments give it away.)

However, when I resize the window, only the first GLEventListener's reshape() is called.  The effect is that the 2nd canvas floats where it was, while the rest of the window repaints underneath it.  That canvas stays fixed in its original screen location until the window is closed.

Note that the Swing layout for my JFrame means that the first canvas size *does* need to change, but the second canvas' *position* needs to change, but not its size.