Re: Need help with Combo Boxes

["Jonathon Jongsma" <jonathon jongsma gmail com>]

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.

--
jonner