[Glade-users] gtk_combo_box_append_text() problem

[captain.deadly at gmail.com (Arigead)]

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Thanks a million for that Carlos I'll go through your code and learn
something about programming gtk, if not some Portuguese ;-)



Carlos Pereira wrote:
> Hello,
>
> Here is my code to populate a drop down with text.
>
> I use it in a C++ program, so I pass a vector of strings to populate
> the dropdown. It should be easy to change it to use char *.
>
> The comments are in portuguese, sorry.... :-)
>
> Best regards
> Carlos
>
>
> // esta funcao preenche qualquer dropdown simples, 1 coluna de string
> void preenche_drop(GtkWidget *DROP, vector<string> CONTEUDO)
> {
>     // preenche um drop down com as strings dentro do vetor CONTEUDO informado
>
>     // zera o conteudo atual do drop down
>     gtk_cell_layout_clear(GTK_CELL_LAYOUT(DROP));
>
>     int cont;
>     GtkListStore *list_store;
>     GtkCellRenderer *renderer;
>     GtkTreeIter iter;
>
>     list_store = gtk_list_store_new (1, G_TYPE_STRING);
>
>     for(cont=0; cont < CONTEUDO.size(); cont++)
>     {
>         char conteudo[130];
>
>         sprintf(conteudo, "%s", CONTEUDO.at(cont).c_str());
>
>         // Add a new row to the model
>         gtk_list_store_append (list_store, &iter);  // add linha vazia
> e faz iter apontar para ela
>         // armazena um valor na lista, na linha apontada por iter, nas
> colunas indicadas
>         // 0 - primeira coluna, e o conteudo da coluna. A lista termina com -1
>         gtk_list_store_set (list_store, &iter, 0, conteudo, -1);
>     }
>
>     gtk_combo_box_set_model(GTK_COMBO_BOX(DROP), GTK_TREE_MODEL(list_store));
>
>     renderer = gtk_cell_renderer_text_new();
>     gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(DROP), renderer, TRUE);
>     gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(DROP), renderer,
> "text", 0, NULL);
>
>     // vou deixar aqui pra servir de referencia, mas nao eh verdade para todo
>     // dropdown criado, pode-se querer ele vazio para que sua alteracao
>     // chame uma callback function
>     //mostra o primeiro item no drop down
>     //gtk_combo_box_set_active(GTK_COMBO_BOX(drop_bds), 0);
> }
>
>
>
>
> On Tue, Oct 21, 2008 at 4:48 AM, Arigead <captain.deadly at gmail.com> wrote:
> jonathan at blueplanet.cl wrote:
> > > > Hi,
> > > >
> > > > > Basically in my C code I get the comboBox with gtk_builder_get_object()
> > > > > and then call gtk_combo_box_append_text() this gives me an error:
> > > > >
> > > > > (gmpg:12154): Gtk-CRITICAL **: gtk_combo_box_append_text: assertion
> > > > > `GTK_IS_LIST_STORE (combo_box->priv->model)' failed
> > > > Did you created the GtkListStore model for that combo box? That warning
> > > > was produced because you didn't set the proper model.
> > > >
> > > > Check the info of gtk_combo_box_set_model ().
> Thanks All for getting back to me,
>
> I'm a bit confused by the GtkListStore model now. If I want to just
> store a list of strings I create a GtkListStore:
>
>    GtkListStore            *list_store;
>    list_store = gtk_list_store_new (1, G_TYPE_STRING);
>
> Now set this to be the model of my combobox:
>
>    gtk_combo_box_set_model((GtkComboBox *) MyComboBox,
>                            (GtkTreeModel *)list_store);
>
> That has gotten rid of the error message OK but I can't add to the list
> of items in the combobox. I've tried adding to the ListStore and the
> Combobox but nothing shows up when I display the interface.
>
>    GtkTreeIter iter;
>
>    /* Add a new row to the model */
>    gtk_list_store_append (list_store, &iter);
>    gtk_list_store_set (list_store, &iter, 0, "Hello", -1);
>
>    /* Simply add to the combobox */
>    gtk_combo_box_append_text((GtkComboBox *)vehicleList, "Hello");
>
>
> Neither of those two methods raise an error on compile time but nothing
> is in the drop down list at all?
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> >

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