Thanks Greg, that works great :-)
On Thu, 20 Aug 2009 09:26:07 am Greg Brown wrote:
> I just checked in the simpler change of simply having PushButton
> always behave like a radio button when it is part of a group. Anything
> else just feels overdesigned - like we're catering to theoretical use
> cases that don't really exist.
>
> So:
> - Radio buttons always select when pushed
> - Checkboxes always toggle when pushed (though they may cycle through
> three states if tri-state)
> - PushButtons always select when part of a group, and cycle through
> two states otherwise (push buttons can be tri-state, but the user
> can't actually cycle to the mixed state)
>
> On Aug 19, 2009, at 7:09 PM, Greg Brown wrote:
> > After giving this some thought, I think the best approach would be
> > to add the "selectOnly" flag to PushButton. I like giving the Button
> > subclass responsibility for deciding how to handle its selection
> > state, rather than relegating it to the Group and requiring all
> > button types to respect it.
> >
> > This way, a PushButton can be configured to behave either like a
> > radio button or like a checkbox when it is in a group (currently, it
> > behaves like a checkbox only).
> >
> > On Aug 19, 2009, at 6:20 PM, Greg Brown wrote:
> >> ...then again, maybe I am wrong about this. Would it make more
> >> sense to adopt the behavior that, if a toggle-style push button is
> >> part of a group, it behaves like a radio button and can't be
> >> deselected, but when not in a group can be toggled on and off? I'm
> >> starting to think that this is a good idea.
> >>
> >> On Aug 19, 2009, at 6:16 PM, Greg Brown wrote:
> >>> I believe there are use cases for allowing the user to deselect a
> >>> toggled button. I can't think of a concrete one right now, but
> >>> it's along the lines of "you can choose A, B, C, or none of the
> >>> above". Radio buttons don't support it, but that's why our toggle-
> >>> style push buttons do.
> >>>
> >>> On Aug 19, 2009, at 6:09 PM, Scott Lanham wrote:
> >>>> For any program I have ever written if the toggle push buttons
> >>>> are grouped
> >>>> then one button in the group must always be selected with the
> >>>> only exception
> >>>> being the initial state of the group where none may be selected.
> >>>>
> >>>> On Thu, 20 Aug 2009 08:04:56 am Greg Brown wrote:
> >>>>>> I'm currently thinking of "selectOnly", but there may be better
> >>>>>> options.
> >>>>>
> >>>>> By the way, comments on this are welcome. Is this a feature that
> >>>>> is
> >>>>> worth adding to PushButton, or would it be better implemented
> >>>>> via a
> >>>>> custom subclass? Is this something that we think developers are
> >>>>> likely
> >>>>> to want to do often? I'm leaning towards "yes", but I'd like to
> >>>>> know
> >>>>> what others think.
> >>>>>
> >>>>> G
