Name: krT82822 Date: 02/15/2000


(see also 4224039->4139098, 4265968->4261325)
[User notes that this is the same problem as # 4224039, but is STILL present in kestrel-rc1]

java version "1.3.0rc1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0rc1-T)
Java HotSpot(TM) Client VM (build 1.3.0rc1-S, mixed mode)

(Bug is in swing and occurs with JDK 1.1.8, 1.2.2 and 1.3RC1)

When removing a component from JTabbedPane using removeTabAt the
documentation says that the removed component will have its visibilty
set to true, and indeed there is code in the removeTabAt method to do
this.

The code does not work however, since the BasicTabbedPaneUI class keeps
a reference to the removed component, in its visibleComponent member
variable, and next time the tabbed pane is validated the BasicTabbedPaneUI
sets the visibility of the component back to false in its setVisibleComponent
method.

This can be very confusing when removing a component from a tabbed pane and
attempting to display it elsewhere. Even naievly setting visibility to true
on the removed component does not work, since the revalidation of the
JTabbedPane gets queued on the event queue, and thus tends to occur after
the component has been removed.

--------------------------------

1/30 email from user:

My bug appears to be an exact duplicate of
4224039, but that bug has been incorrectly marked as closed, probably
because the reviewer did not understand the report. The bug is in fact still
present in JDK 1.3 RC1.

I have attached a test case to this e-mail. Pushing the "show bug" button
will produce a frame containing an (incorrectly) invisible button. Pushing
"show workaround" uses the workaround in my bug report to show what should
happen (a frame with a visible button inside).

The description in bug 4224039 or my bug report describes in detail what is
happening. The bug is a liitle subtle, and sounds similar to the earlier bug
4139098, but is not the same.


(Review ID: 100527)
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