GtkCellRendererCombo question

[Ludo Van Put <Ludo VanPut elis UGent be>]

Hi all,

I am trying to create a TreeView, of which a column should display a 
combo box.
So I have listmodel ListModelA with a GTK_TYPE_TREE_MODEL in it and then 
this model is filled with data. I add listmodels (ListModelB) with 2 
columns to the listmodel ListModelA, previously created or possibly a 
NULL pointer.

Then for the TreeView of ListModelA I create a GtkCellRendererCombo and 
I use gtk_tree_view_column_set_cell_data_func so I can set the model 
property of the cell renderer if the model retrieved from ListModelA is 
not NULL. (LancetSectionSymbolCellRendererSetModel)

Then I set
g_object_set(renderer,"has-entry",FALSE, "text-column", 
SYMBOL_NAME_COLUMN, "editable", FALSE, NULL);

When I look at the result, I get no warnings at run-time or 
compile-time, but I don't see any Combo in the resulting TreeViewColumn.

What am I doing wrong?

I've included the (relevant part of the) source below.

Thanks for any help.

Ludo

-------------------------


    845 static void 
LancetSectionSymbolCellRendererSetModel(GtkTreeViewColumn *col,
    846     GtkCellRenderer   *renderer,
    847     GtkTreeModel      *model,
    848     GtkTreeIter       *iter,
    849     gpointer           user_data)
    850 {
    851   gpointer data;
    852   GtkTreeModel * combo_model;
    853   gtk_tree_model_get(model, iter, SYMBOL_COLUMN, &data, -1);
    854   combo_model = GTK_TREE_MODEL(data);
    855   if (data)
    856     g_object_set(renderer, "model", combo_model, NULL);
    857 }
    858
    859 GtkWidget * LancetSectionGetTableView(t_section * section)
    860 {
    861   GtkListStore * list_store;
    862   GtkTreeIter tree_iter;
    863   GtkWidget * section_view;
    864   GtkCellRenderer * renderer;
    865   GtkTreeViewColumn *column;
    866   GtkWidget * listscroll;
    867   char* section_data;
    868   t_symbol_ref * symref;
    869   t_reloc_ref * relref;
    870   t_uint32 i;
    871
    872   /* First we create a model to store the data and subsequently 
fill it with the data */
    873   list_store = gtk_list_store_new(N_SECTION_VIEW_COLUMNS, 
G_TYPE_INT, GTK_TYPE_TREE_MODEL, G_TYPE_POINTER, G_TYPE_POINTER, 
G_TYPE_POINTER);
    874
    875   section_data = SECTION_DATA(section);
    876   listscroll=gtk_scrolled_window_new(NULL,NULL);
    877 
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(listscroll),GTK_POLICY_AUTOMATIC,GTK_POLICY_AUTOMATIC);
    878
    879   symref = SECTION_REFED_BY_SYM(section);
    880
    881
    882   for (i=0; i < SECTION_CSIZE(section); i+=4)
    883   {
    884     GtkListStore * combo_list_store = NULL;
    885     GtkTreeIter combo_tree_iter;
    886
    887     /* Check if there is a symbol pointing to this offset */
    888     while(symref && 
AddressIsLt(SYMBOL_OFFSET_FROM_START(symref->sym),AddressNewForSection(section,i)))
    889       symref = symref->next;
    890
    891     /* If we have symbols, lets create a model to store them */
    892     if(symref && 
AddressIsEq(SYMBOL_OFFSET_FROM_START(symref->sym),AddressNewForSection(section,i)))
    893     {
    894       combo_list_store = gtk_list_store_new(2, G_TYPE_STRING, 
G_TYPE_POINTER);
    895     }
    896     while(symref && 
AddressIsEq(SYMBOL_OFFSET_FROM_START(symref->sym),AddressNewForSection(section,i)))
    897     {
    898       t_bool local_sym = 
((SYMBOL_ORDER(symref->sym)<0)&&(SYMBOL_SEARCH(symref->sym)==FALSE));
    899       t_string symbol_name = StringIo("(%s) %s",
    900           local_sym?"l":"g",
    901           SYMBOL_NAME(symref->sym));
    902       if(local_sym)
    903         gtk_list_store_append(combo_list_store, &combo_tree_iter);
    904       else
    905         gtk_list_store_prepend(combo_list_store, &combo_tree_iter);
    906       gtk_list_store_set(combo_list_store, &combo_tree_iter, 
SYMBOL_NAME_COLUMN, symbol_name, SYMBOL_POINTER_COLUMN, symref->sym, -1);
    907 /*      VERBOSE(0,("Symbol @S is pointing at this offset 
(%d)",symref->sym,i));*/
    908       Free(symbol_name);
    909       symref = symref->next;
    910     }
    911
    912
    913     gtk_list_store_append(list_store, &tree_iter);
    914
    915     if(section_data)
    916     {
    917       printf("TM?: %d\n",GTK_IS_TREE_MODEL(combo_list_store));
    918
    919       gtk_list_store_set(list_store, &tree_iter, OFFSET_COLUMN, 
i, SYMBOL_COLUMN, GTK_TREE_MODEL(combo_list_store), DATA_COLUMN, 
section_data+i, REFERS_TO_COLUMN, NULL, REFED_BY_COLUMN, NULL, -1);
    920     }
    921     else
    922       gtk_list_store_set(list_store, &tree_iter, OFFSET_COLUMN, 
i, SYMBOL_COLUMN, GTK_TREE_MODEL(combo_list_store), DATA_COLUMN, NULL, 
REFERS_TO_COLUMN, NULL, REFED_BY_COLUMN, NULL, -1);
    923
    ...
    942
    943   section_view = gtk_tree_view_new_with_model 
(GTK_TREE_MODEL(list_store));
    944
    945   /* The first column displays the offset */
    946   renderer = gtk_cell_renderer_text_new();
    947   column = gtk_tree_view_column_new();
    948   gtk_tree_view_column_set_title(column, "Offset");
    949   gtk_tree_view_column_pack_start(column, renderer, TRUE);
    950   gtk_tree_view_column_set_cell_data_func(column, renderer, 
LancetSectionOffsetCellRendererFunction, NULL, NULL);
    951   gtk_tree_view_append_column(GTK_TREE_VIEW(section_view), column);
    952   /* The second column display the data in hex values */
    953   column = gtk_tree_view_column_new();
    954   gtk_tree_view_column_set_title(column, "Data");
    955   renderer = gtk_cell_renderer_text_new();
    956   gtk_tree_view_column_pack_start(column, renderer, TRUE);
    957   gtk_tree_view_column_set_cell_data_func(column, renderer, 
LancetSectionDataCellRendererAsHex, NULL, NULL);
    958   renderer = gtk_cell_renderer_text_new();
    959   gtk_tree_view_column_pack_end(column, renderer, TRUE);
    960   gtk_tree_view_column_set_cell_data_func(column, renderer, 
LancetSectionDataCellRendererAsChar, NULL, NULL);
    961   gtk_tree_view_append_column(GTK_TREE_VIEW(section_view), column);
    962   /* The third column will show the symbols pointing to the 
offset */
    963   renderer = gtk_cell_renderer_combo_new();
    964 /*  column = 
gtk_tree_view_column_new_with_attributes("Symbols", renderer, "model", 
SYMBOL_COLUMN, NULL); This is not working as the model might be NULL...*/
    965   g_object_set(renderer,"has-entry",FALSE, "text-column", 
SYMBOL_NAME_COLUMN, "editable", FALSE, NULL);
    966   column = gtk_tree_view_column_new();
    967   gtk_tree_view_column_set_title(column, "Symbols");
    968   gtk_tree_view_column_pack_start(column, renderer, TRUE);
    969   gtk_tree_view_column_set_cell_data_func(column, renderer, 
LancetSectionSymbolCellRendererSetModel, NULL, NULL);
    970   gtk_tree_view_append_column(GTK_TREE_VIEW(section_view), column);
    971
    972   gtk_container_add(GTK_CONTAINER(listscroll), section_view);
    973
    974   return listscroll;
    975 }