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Hendrik Jahnke
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 Posted: Thu Mar 04, 2004 8:18 am Post subject: strange swing update problem even if using "invokeLater()" |
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Hi,
I hope someone can help me with this:
I'm using an applet to manage a SNMP device. Everytime SNMP packets
come in, their data is being displayed in several fields, lables,
tables etc., depending on the kind of data.
That means I have to update the GUI while it is being displayed, and
since SWING is not thread safe, I'm using SwingUtilities.invokeLater()
for the update process. I checked with
SwingUtilities.isEventDispatchingThread() and it returns "true" for
every update that is made, so everything SHOULD be fine.
Except that it isn't.
For example, there's a JLabel with a TitledBorder and some text in it.
If this label is being updated (the text is changed via setText())
while being displayed, the text of the TitledBorder gets BOLD, and the
header of a JTable that is being displayed in the same panel as the
label, shrinks to 2/3 of its original height.If I switch between
labels and select the corrupted one again, everything is fine again.
Calling repaint() after changing the text doesn't help.
Any suggestions?
Hendrik
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Thomas Weidenfeller
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| Posted: Thu Mar 04, 2004 8:25 am Post subject: Re: strange swing update problem even if using "invokeLater( |
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Hendrik Jahnke wrote:
| Quote: | Hi,
I hope someone can help me with this:
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We run low on psychic power these days.
Check Sun's bug parade if this is a known bug. If not, follow the advice
on http://www.physci.org/codes/sscce.jsp
/Thomas
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Hendrik Jahnke
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| Posted: Fri Mar 05, 2004 7:10 am Post subject: Re: strange swing update problem even if using "invokeLater( |
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Thomas Weidenfeller <nobody (AT) ericsson (DOT) invalid> wrote
| Quote: | Hendrik Jahnke wrote:
Hi,
I hope someone can help me with this:
We run low on psychic power these days.
Check Sun's bug parade if this is a known bug. If not, follow the advice
on http://www.physci.org/codes/sscce.jsp
/Thomas
|
Unfortunately the project is relatively complex, so I can't post
working example code, at least not now. Am I the only one with the
described problem?
It comes down to these facts:
- there's a JPanel containing a JTable, a JLabel with text and a
TitledBorder, and
two JLabels with a TitledBorder and some RadioButtons in them
- when text of the JLabel containing only text is changed with
settText() (by an external event), all the titles of the TitledBorders
become bold and the Header of the JTable shrinks to 2/3 of its
original height
- when doing the update, I'm definitely using the EventDispatch Thread
via SwingUtilities.invokeLater()
Not a known problem?
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Thomas Weidenfeller
Guest
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| Posted: Fri Mar 05, 2004 8:04 am Post subject: Re: strange swing update problem even if using "invokeLater( |
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Hendrik Jahnke wrote:
| Quote: | Unfortunately the project is relatively complex, so I can't post
working example code,
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You could. Just sit down, use your favorite editor and write example
code demonstrating the problem. Do you really think someone can figure
out what is going on from you list of components, without actually
seeing how you have set up, configured and interconnected them?
Ah well, it is your problem, not ours. If you don't want to spend time
on it, why should we?
/Thomas
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John Schank
Guest
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| Posted: Fri Mar 05, 2004 8:05 am Post subject: Re: strange swing update problem even if using "invokeLater( |
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I don't know if I'm understanding the problem correctly, but...
Perhaps you'd have better luck if, instead of a JLabel with a titled
border and radio buttons in it. You could instead create a JPanel, and
put the label and buttons on the JPanel. Using some layout manager. The
titled border, in this case would apply to the JPanel, not the label
directly.
John Schank
On 2004-03-05 02:10:44 -0500, [email]hendrik.jahnke (AT) web (DOT) de[/email] (Hendrik Jahnke) said:
| Quote: | Thomas Weidenfeller <nobody (AT) ericsson (DOT) invalid> wrote in message
news:<c26p25$foq$1 (AT) newstree (DOT) wise.edt.ericsson.se>...
Hendrik Jahnke wrote:
Hi,
I hope someone can help me with this:
We run low on psychic power these days.
Check Sun's bug parade if this is a known bug. If not, follow the
advice on http://www.physci.org/codes/sscce.jsp
/Thomas
Unfortunately the project is relatively complex, so I can't post
working example code, at least not now. Am I the only one with the
described problem?
It comes down to these facts:
- there's a JPanel containing a JTable, a JLabel with text and a
TitledBorder, and
two JLabels with a TitledBorder and some RadioButtons in them
- when text of the JLabel containing only text is changed with
settText() (by an external event), all the titles of the TitledBorders
become bold and the Header of the JTable shrinks to 2/3 of its
original height
- when doing the update, I'm definitely using the EventDispatch Thread
via SwingUtilities.invokeLater()
Not a known problem?
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