I am used to group many mutually-exclusive radio buttons together.
In addition, just like every BContainer I can perform simple management
by putting widgets next to each other, from left to right or (which is
more useful in this particular case...) from top to bottom.
Answer the index of the button that is currently selected,
1 being the first button added to the radio button group.
0 means that no button is selected
value: value
Force the value-th button added to the radio button group
to be the selected one.
1.38.2 BLOX.BRadioGroup: widget protocol
destroyed
Private - The receiver has been destroyed, clear the corresponding
Tcl variable to avoid memory leaks.
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on May, 22 2008
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