Re: JFrame bleed-through
On Aug 29, 10:11 am, Todd <todd.heident...@lmco.com> wrote:
Hello,
This is just an information collecting pre-question as I have not yet
figured out how to make an SSCCE for my issue.
I have two JFrame windows. The first window has a single embedded
JPanel upon which points and lines are painted (i.e., a plotting
window). The second window has multiple embedded JPanel's upon which
many different widgets are placed for application configuration.
My problem is that when updates are performed in the plotting window,
it grabs the visual aspects of the application window and overlays
them upon the plot. Not what I really want. BTW, by visual aspects,
I mean that the application window is redrawn within the plot window,
widgets and all, but there is no functionality to any of the widgets.
Has anyone else experienced this? I was thinking that this may be a
JDK issue as I don't see it on machines where JDK 6 update 1 is
installed, however this is not a very satisfactory intuitive response.
If you have constructive comments on this topic, I would love to see
them. Please don't flame me for not yet having an SSCCE.
Thanks,
Todd
Sounds like you're JPanel getOpaque() is returning true, but it is
NOT, in fact, opaque. In other words, its not drawing the background
that its supposed to.
My suggestion is either to do a fillRect in the paintComponent object,
or setOpaque(false) in the initialization code for your panel.
Alternatively, use JComponent rather than JPanel. JPanel implies
container, while JComponent does not. Even though both can contain
components, JPanel's purpose is specific, where JComponent is not.
Hope this helps.