[Glade-users] Destroy and rebuild a treeview widget
Tristan Van Berkom
tvb at gnome.org
Mon Jun 5 11:02:58 EDT 2006
Guillaume Ruch wrote:
[...]
> Hi,
> Once again, thanks for your rapid answer :) In fact, like medhi, I wanted to use clist, but it's
> deprecated so... I cant really understand treeview/liststore, even with the gtk tutorials, I
> think I'm in the right way, but I know I lack 2 or 3 things to make it work... Can you have a look
> on this?
>
You must always go to http://www.gtk.org/api/ or to /usr/include/gtk+-2.0
before randomly calling functions with improvised arguments, otherwise
people like me who just want to be helpfull find that they are doing
everybodies' work for them.
Some errors I noticed follow:
>
> create_treeview()
>
> GtkCellRenderer *rend;
> GtkTreeViewColumn *col;
> GtkWidget *listview;
> GtkListStore *liststore;
> gchar *sql, *label;
> MYSQL_RES *res_str;
> MYSQL_FIELD *field;
> MYSQL_ROW db_row;
> gint i, cols;
> gchar *row[20] = {"", "", "", "", "",
> "", "", "", "", "",
> "", "", ""};
>
>
> sql = g_strconcat("select * from ", nom_table, 0L);
> g_print("sql is: %s\n", sql);
> if (mysql_query (conn, sql) != 0)
> {
> g_print("Echec de la requete...\n");
> return 0L;
> }
> res_str = mysql_store_result (conn);
> g_print("mysql_store_result...OK\n");
>
>
>
> /**********************Création de la liste****************/
> cols = mysql_num_fields(res_str);
>
>
>
> liststore= gtk_list_store_new(gint cols);
>
Since you are using a dynamic list store... you must use gtk_list_store_newv():
http://developer.gnome.org/doc/API/2.0/gtk/GtkListStore.html#gtk-list-store-newv
and specify the data types for the fields in your list store (in your case
G_TYPE_STRING I suppose).
>
> while ((db_row = mysql_fetch_row (res_str)) != 0L)
> {
> for (i = 0; i < cols; i++)
> {
> row[i] = db_row[i];
> }
> gtk_list_store_append(liststore, row);
gtk_list_store_append takes a pointer to an allocated GtkTreeIter as
its second argument... the GtkTreeIter will be set to describe the newly
appended row:
GtkTreeIter iter;
/* append row */
gtk_list_store_append(liststore, &iter);
/* Fill row data in the treemodel */
gtk_list_store_set (store, &iter,
column_number, column_data,
column_number, column_data,
column_number, column_data,
-1); // vararg terminator
>
> }
>
> /* Creation de la vue */
>
> listview = gtk_tree_view_new_with_model(GTK_TREE_MODEL(liststore));
>
>
> for (i = 0; i < cols; i++)
> {
> mysql_field_seek(res_str, i);
> field = mysql_fetch_field(res_str);
> label = gtk_label_new (field->name);
> rend = gtk_cell_renderer_text_new();
> col = gtk_tree_view_column_new_with_attributes(label,
I believe gtk_tree_view_column_new_with_attributes() takes "const gchar *" as
the first arg... not "GtkLabel *".
> rend,"text", TEXT_COLUMN, NULL);
> gtk_tree_view_append_column(GTK_TREE_VIEW(listview), col);
> }
>
>
> gtk_widget_show (listview)
>
> }
>
> This may display the contents of mysql_fetch_row on each row till it returns null, but I don't
> know how to add data and I can't find the answer (i'm sure it's on the tutorial but...) After, a
> click on a button will remove the data and rebuild it (I hope the dynamic column creation is
> right...) Content will never excess 13 columns.
>
Cheers,
-Tristan
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