🚀 go-pugleaf

In article <71qg51$bin25@forums.borland.com>, jasonb@tmscorp.com says...
> I was wondering if anyone had figured out how to make a checkbox (either
> AWT, Swing, or JBCL) have three states (checked, unchecked, and null).  This
> seems pretty critical for any database entry screen, so I must be missing it
> somewhere.

You can do this trick, where the button appears as if it were in the 
middle of being pressed to get the "grayed out" appearance.  Here, you 
can set the variable "desiredState" so the checkbox is grayed out checked 
or grayed out unchecked.

I set the pressed state false first because it gets confused otherwise 
and progresses to the next state as if it really were pressed:

boolean desiredState = false;

jCheckBoxLimitChange.getModel ().setPressed (false);
jCheckBoxLimitChange.getModel ().setSelected (desiredState);
jCheckBoxLimitChange.getModel ().setPressed (true);

You can also use images added to a JLabel rather than using a checkbox at 
all.  Add one of three appropriate images (checked, unchecked, null).