[Gambas-user] re-setting several radiobuttons to false ?how

[Ron_1st]

On Wednesday 05 August 2009, Charlie Reinl wrote:
> Am Mittwoch, den 05.08.2009, 17:48 +1000 schrieb richard terry:
> > If one has say 3 radiobuttons in a container
> > is there anyway to set them all back to false ?
> > 
> > If I try this code to clear some textboxes, checkboxes and radiobuttons 
> > contained within a hbox, the tetboxes clear and checkboxes clear, but not the 
> > radiobuttons:
> >  
> >   Dim hCtrl As Control
> >   Dim hb As HBox
> >   Dim tb As TextBox
> >   Dim cb As CheckBox
> >   Dim rb As RadioButton
> > 
> >  For Each hctrl In Vbox1.children
> >      If hctrl Is hbox Then
> >         hb = hctrl
> >        For Each hCtrl In HB.Children
> >          If hctrl Is textbox Then
> >             tb = hctrl
> >             tb.Clear()
> >          Else If hctrl Is RadioButton Then
> >             rb = hctrl 
> >             rb.value = False   
> >          Else If hctrl Is checkbox Then
> >               cb = hctrl
> >              cb.value = False  
> >         End If
> >        Next      
> >      End If
> >   Next
> > 
> > If I directly address the radiobutton in the group by name, it still dosn't 
> > clear.
> > 
> > any help appreciated.
> > 
> > Richard
> 
> Salut Richard,
> 
> https://secure.wikimedia.org/wikipedia/en/wiki/Radiobutton
> 
> The Apple Human Interface Guidelines specify that one item of a radio
> button group must always be selected.
> 
> Charlie
> 

You can add a forth radio button in the group and set it hidden.
By setting this 4'th to true the others go false.
More correct is to set the 4'th not hidden but label it as 'None of the others'

Not only the 'Apple Human Interface Guidelines' but many other say the same.
Only on web pages the _browser_ (specific IE) does allow none is true.
In fact it is the fault of the web page developer to not set one to true.


Best regards,

Ron_1st

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