Mac exception on "frame.add( canvas )"

OpenGL Development JOGL Development
#1

Porting a working Jogl program (equivalent to the “gears” demo) to my new Mac using Eclipse, compiles OK, but I get an exception at run-time indicating its improper to add my glcanvas to a frame and advises I should add the glcanvas to the frame’s content pane. While this may be correct using a standard setup, is there a workaround? Has anyone run into this problem? Seem to be inherent in the JVM.

Tried running from Eclipse and command line - got same results.

I’m new to the Mac and Eclipse (I’ve been using NetBeans on Windows and Linux) so, it may be cockpit error.

#2

It’s the common way of doing this with jdk 1.4 or less (on any os).

frame.add(X) => frame.getContentPane().add(X);

If you plan to develop for 1.5(Win/Linux) and 1.4(Mac), you’ll have to stick to the old api, on override add() on your subclass of JFrame.

Lilian

#3

If you used a Frame it should work fine. If you’re using a JFrame you have to add it to the contentpane. (myJFrame.getContentPane.add(canvas)) :slight_smile:

#4

I did get it to run by adding to the contentPane, however the results were a little odd. At that point, I was probably had the wrong frame type. I’ll try at home again tonight, if I can get througn XCode, Eclipse, Finder, OsX, AppleScript, etc. overload.

Thanks

#5

As pointed out above, You’re probably trying to add a GLCanvas to a JFrame. This is ill-advised, Use a Frame instead of a JFrame, and just use frame.add(canvas) and it ought to work just fine. JFrame is a Swing component that overrides Frame and adds in the contentpane which is a lightweight component. GLCanvas is a heavyweight AWT component that doesn’t really play nice with the lightweight swing stuff.

As an example, heres how I do it, works with no problems.


GLCapabilities desiredCaps = new GLCapabilities();
desiredCaps.setDepthBits(24);
        
canvas = GLDrawableFactory.getFactory().createGLCanvas(desiredCaps);
canvas.setGL(new DebugGL(canvas.getGL()));
frame = new Frame();
frame.setLayout(new BorderLayout());
frame.add(canvas, BorderLayout.CENTER);

D.

#6

is there a way to work with swing/jogl?
iv read that the jglpanel or however its named isnt hardwareaccelerated… and i wanted to make a jtabbed pane for a game… with one tab für the gl part of the game and the other ones for the main menue and such stuff
till now i thought i can easiely put my glcanvas onto the jtabbedpane cause its supposed to be on the top so i thought it makes no difference if i use the heavywight canvas :confused:

#7

I stuff my GLPanel in a JLabel and then inside a tabbed pane. Works like a charm. And all this inside a JFrame :slight_smile:

#8

lol why in a jlabel??
i thought we’r supposed to use glcanvas not glpanel couse i dont know :wink:
nah there is something in my mind about glpanel not accelerated or something

#9

Otherwise I get all kind of nasty crashes when integrating the GLCanvas inside my other swing components.

#10

i just tryed a jframe->jpanel->glcanvas
and is seemed to work (not a big test i know im lazie :wink:
however if i use gljpanel it gets damn slow…

and that nasty heavywight thing… but there is no way around or?