Re: Need help with Combo Boxes

[Allen <allen saucier cas-inc com>]

Jonathon Jongsma wrote:
> On 7/26/07, Allen <allen saucier cas-inc com> wrote:
> > Hi all,
> >
> > I am trying to build a combo box's content on the fly but I'm missing
> > something & I don't know what it is.  Would someone please help me? I am
> > able to add a Row to the Combo Box.  I am able to set the value of that
> > row.  But the value does NOT  APPEAR  when I click the combo box down
> > arrow button.  Just a BLANK  ROW  appears.   Here is the code that I'm
> > using:
> >
> > In the HEADER:
> >
> >     class CFireButtonMortarTrajModelColumns : public
> > Gtk::TreeModel::ColumnRecord
> >     {
> >       public:
> >         CFireButtonMortarTrajModelColumns()
> >         {
> >           //add(m_colRowNumber);                     // position 0
> >           add(m_colFireButtonToMortarTrajLineName);
> >         }; ///< ctor
> >
> >         ~CFireButtonMortarTrajModelColumns() {;}; ///< dtor
> >
> >       public:
> >             Gtk::TreeModelColumn<int>  m_colRowNumber; ///< Row Number
> >             Gtk::TreeModelColumn<int>  
> > m_colFireButtonToMortarTrajLineName;
> >     }; // class CFireButtonMortarTrajModelColumns
> >
> > Gtk::ComboBox    *m_comboboxFireMortar1TrajName;
> > CFireButtonMortarTrajModelColumns  m_cFireButtonMortarTrajModelColumns;
> > Glib::RefPtr<Gtk::ListStore>
> > m_glsFireButton1MortarTrajConnectionComboBoxList;
> >
> >
> > IN the CPP:
> >
> > m_refGlade->get_widget("combobox_fireMortar1TrajName",
> > m_comboboxFireMortar1TrajName);
> > m_glsFireButton1MortarTrajConnectionComboBoxList =
> > Gtk::ListStore::create( m_cFireButtonMortarTrajModelColumns );
> > m_comboboxFireMortar1TrajName->set_model(m_glsFireButton1MortarTrajConnectionComboBoxList); 
> >
> >
> > m_glsFireButton1MortarTrajConnectionComboBoxList->append()->set_value(m_cFireButtonMortarTrajModelColumns.m_colFireButtonToMortarTrajLineName, 
> >
> > p_iTrajectoryLineNumberToAdd);
> >
> > This code produces a BLANK  ROW  in my combo box.  What am I not doing
> > that is preventing me from seeing the value displayed?
> >
> > Thanks everyone.  I really appreciate your help.
>
> m_comboboxFireMortar1TrajName->pack_start(m_cFireButtonMortarTrajModelColumns.m_colFireButtonToMortarTrajLineName) 
>
>
> you need to pack columns into the combobox as well.  This allows you
> to specify that you only want certain of the model columns actually
> displayed in the widget.  It's the same basic concept as a TreeView.
Thank you Jonathon!

It works perfectly !!!!  It knew it was simple but I just couldn't 
figure it out w/o any examples on hand.  Much Appreciated!!! :-)

--
Sincerely, Allen