Does latest JDK fully support mixing of heavy and light components

[hello2010]

Hi there,

Older JDKs have problems to support mixing heavy and light components.

I learned from below article that newer JDKs(since JDK 6 update 12 and JDK7 build 19 releases) can seamlessly mixing heavyweight and lightweight components,
Mixing heavy and light components

If the answer to my question is yes, can someone helps to provide some programming tips? I have problems to mix heavy and light components(Canvas and swing components) here.


Thanks,
Lin

[DarrylBurke]

I have problems to mix heavy and light components(Canvas and swing components)

I fail to understand why you think you need to do this. The page linked from that page (Mixing Heavyweight and Lightweight Components) details several gotchas and at least one so far unresolved bug.

db

[toadaly]

My bet is that the problems associated with mixing heavy and lightweight components will never be fully worked out. You should give strong consideration to reworking your project to be 100% lightweight.

[hello2010]

Thanks for your quick replies!

Since currently we have no better solution than using GLCanvas(extends Canvas)/JOGL to resolve image tearing issue, we have to consider mix heavy and light components.

Do you have any other approaches to avoid tearing?

[toadaly]

If you can't go 100% lightweight, then I recommend the following approach:

For pull-down's and pop-ups that could intersect a heavy weight component, use heavy weights. For everything else, lightweight components should work fine. This requires care in laying out the gui to avoid turning everything heavyweight.

[hello2010]

Sorry, I don't quite understand your points. Could you please explain in detail? I am very interested in that.

[toadaly]

Suppose you have a pull down menu that's a lightweight swing JMenu. If that can possibly overlap a heavyweight component, then what'll happen is you'll end up with a partially drawn menu with your heavy weight component drawn over part of it.

You either need to use a heavyweight menu in that case, or arrange the GUI such that pull down menu's won't ever try to paint over an area occupied by a heavy weight component.

[hello2010]

Thanks, it's clear now.