Re: [PHP-GTK] Combobox issue (repopulate)

Hello,

I think you're passing $modelo4 to connect_simple() when its not yet an 
object, perhaps expecting the value (object reference) you later assign 
to $modelo4 to be passed when in fact it will be passing the value 
(probably empty) of $modelo4 as it is when connect_simple() is called.  
For example, with this callback:

function isGtkListStore($model)
{
    if($model instanceof GtkListStore)
        print("Model is a GtkListStore.\n");
    else
        print("Model is not a GtkListStore.\n");
}

If you do this:

$combo_box->connect_simple('changed', 'isGtkListStore', $model);
$model = new GtkListStore(Gtk::TYPE_STRING);

Then you will see "Model is not a GtkListStore" printed with each 
changed signal.  If instead you do:

$model = new GtkListStore(Gtk::TYPE_STRING);
$combo_box->connect_simple('changed', 'isGtkListStore', $model);

Then you will see "Model is a GtkListStore" printed with each changed 
signal.

-Jake Cobb


Robertico wrote:
> Hi friends.
>
>    I have problems repopulating a combobox depends on a previous combobox
> selection. I build my form by a loop and in some part it does the next:
>
>
> ## Combobox para Tercero (First Combobox)
>             }else if($fila == 2)
>             {
>                 $aTipo =
> array("04"=>"Nacional","05"=>"Extranjero","06"=>"Global");
>
>
>                 $cajasCampos[$fila] = new GtkComboBox();
>                 $modelo3 = new
> GtkListStore(Gtk::TYPE_STRING,Gtk::TYPE_STRING);
>                 $cajasCampos[$fila]->set_model($modelo3);
>                 $cellRenderer = new GtkCellRendererText();
>                 $cajasCampos[$fila]->pack_start($cellRenderer);
>                 $cajasCampos[$fila]->set_attributes($cellRenderer, 'text',
> 0);
>                 $cajasCampos[$fila]->set_attributes($cellRenderer, 'text',
> 1);
>
>                 fillCombobox($modelo3,$aTipo); // easy function that
> populate the combo, receives the model and the array elements
>                 $cajasCampos[$fila]->set_active(0);
>
> $cajasCampos[$fila]->connect_simple('changed','cambiaTercero',$cajasCampos[$fila],$modelo4);
> // calling the function to repopulate
>
>                 $tabla->attach($cajasCampos[$fila],1,2,$fila,$fila+1);
>
>
>             ## Combobox para Operacion (Second combobox, the one I want to
> to change it)
>             }else if($fila == 3)
>             {
>                 $aOperacion = array("03"=>"Prestación de Servicios
> Profesionales",
>                                              "06"=>"Arrendamiento de
> Inmuebles",
>                                              "85"=>"Otros");
>
>
>                 $cajasCampos[$fila] = new GtkComboBox();
>                 $modelo4 = new
> GtkListStore(Gtk::TYPE_STRING,Gtk::TYPE_STRING);
>                 $cajasCampos[$fila]->set_model($modelo4);
>                 $cellRenderer = new GtkCellRendererText();
>                 $cajasCampos[$fila]->pack_start($cellRenderer);
>                 $cajasCampos[$fila]->set_attributes($cellRenderer, 'text',
> 0);
>                 $cajasCampos[$fila]->set_attributes($cellRenderer, 'text',
> 1);
>
>                 fillCombobox($modelo4,$aOperacion);
>                 $cajasCampos[$fila]->set_active(0);
>
>                 $tabla->attach($cajasCampos[$fila],1,2,$fila,$fila+1);
>
>             }
>
> Then I have these functions
>
> function fillCombobox($modelo,$arreglo)
> {
> ## Rellenamos el combo con sus datos (Populate the array)
>     while(list($valor,$texto) = each($arreglo))
>     {
>       $modelo->append(array($valor,$texto));
>     }
> }
>
> function cambiaTercero($combo,$modelo) // this function should repopulate
> the second combobox
> {
>     $seleccion = $combo->get_model();
>     $valor = $seleccion->get_value($combo->get_active_iter(),0);
>
>         switch ($valor)
>         {
>             case '04':
>                             $aNOperacion = array("03"=>"Prestación de
> Servicios Profesionales",
>
> "06"=>"Arrendamiento de Inmuebles",
>
> "85"=>"Otros");
>                             break;
>             case '05':
>                             $aNOperacion = array("03"=>"Prestación de
> Servicios Profesionales",
>
> "85"=>"Otros");
>                             break;
>             case '15':
>                             $aNOperacion = array("03"=>"Prestación de
> Servicios Profesionales",
>
> "06"=>"Arrendamiento de Inmuebles",
>
> "85"=>"Otros");
>                             break;
>         }
>         $modelo->clear();
>         fillCombobox($modelo,$aNoperacion);
> }
>
>
> Well, php tell me I'm calling a function clear() on a non-object.
>
> Thanks to all!
>
>