[Qt-interest] Multiple signals to one slot

[Tony Rietwyk]

Hi Neville, 

I would suggest to use QButtonGroup instead of QSignalMapper on
QAbstractButton derivatives - much easier and it does the reverse lookups as
well (see button(int id) function). 

Tony

> -----Original Message-----
> Thank you, but I needed the mapped int to still be passed. I 
> suppose I 
> could set a userdata for each checkbox to carry this, but after some 
> futher reading I found that you can get the object from the 
> mapped id. 
> So I now do:
> 
>     QCheckBox *cb = qobject_cast<QCheckBox 
> *>(m_signalMapperConceptFilters->mapping(i));
> 
> and I have my QCheckBox widget as well as the map int
> 
> Andreas Pakulat wrote:
> > On 30.01.10 20:09:41, Neville Dastur wrote:
> >   
> >> Hi
> >>
> >> I have a group of checkboxes. Using the QSignalMapper I 
> "connect" all of 
> >> them to a single member function
> >>
> >> connect(ui->checkBoxDescriptionStatus_Current,
> >>     SIGNAL(stateChanged(int)),
> >>     m_signalMapperDescriptionFilters,
> >>     SLOT(map()));
> >> connect(ui->checkBoxDescriptionStatus_Retired,
> >>     SIGNAL(stateChanged(int)),
> >>     m_signalMapperDescriptionFilters,
> >>     SLOT(map()));
> >>
> >> etc ...
> >>
> >> I use the setMapper to specify a int for each checkbox
> >>
> >> 
> m_signalMapperDescriptionFilters->setMapping(ui->checkBoxDescr
> iptionStatus_Current,
> >>     NBD::ND_SNOMED_DESCRIPTIONSTATUS_Current);
> >> 
> m_signalMapperDescriptionFilters->setMapping(ui->checkBoxDescr
> iptionStatus_Retired, 
> >>
> >>     NBD::ND_SNOMED_DESCRIPTIONSTATUS_Retired);
> >>
> >> and finally connect the whole thing together with:
> >> connect(m_signalMapperDescriptionFilters,
> >>     SIGNAL(mapped(int)),
> >>     this,
> >>     SLOT(map_DescriptionStatusFilterChange(int)));
> >>
> >> My problem now is how do a get the actual state of the 
> checkbox that 
> >> fired the signal?
> >>     
> >
> > Either store a map of int->QCheckBox, or use the QWidget* version of
> > setMapping to transport the checkbox, then you can simply 
> cast it in the
> > slot.
> >
> > Andreas
> >
> >