I have the following problem. I'm developing an application which uses gtktreeview for displaying data retrieved from MySQL database.
I've already done few examples of gtktreeview, I was able to add, clear, remove from the list. Now I wanted to adapt this example to my application and suddenly it doesn't work anymore.
Here is the example I used which works.
The enum:
static enum {
FIRST_NAME,
LAST_NAME,
N_COL
};
The variables:
static GtkWidget *list;
static GtkWidget *f_entry;
static GtkWidget *l_entry;
The setup of a list:
static GtkWidget *setup_list()
{
GtkWidget *sc_win;
GtkListStore *store;
GtkCellRenderer *cell;
GtkTreeViewColumn *column;
sc_win = gtk_scrolled_window_new(NULL, NULL);
gtk_widget_set_usize(sc_win, 250, 150);
store = gtk_list_store_new(N_COL, G_TYPE_STRING, G_TYPE_STRING);
list = gtk_tree_view_new_with_model(GTK_TREE_MODEL(store));
cell = gtk_cell_renderer_text_new();
// column of the names
column = gtk_tree_view_column_new_with_attributes("Imię", cell, "text", FIRST_NAME, NULL);
gtk_tree_view_append_column(GTK_TREE_VIEW(list), column);
// column of the surnames
column = gtk_tree_view_column_new_with_attributes("Nazwisko", cell, "text", LAST_NAME, NULL);
gtk_tree_view_append_column(GTK_TREE_VIEW(list), column);
// scrolls
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sc_win), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
gtk_container_add(GTK_CONTAINER(sc_win), list);
// free the store variable and return the scrolled window pointer
g_object_unref(G_OBJECT(store));
return sc_win;
}
The function which adds an element:
static void list_add_cb(GtkWidget* widget, gpointer data)
{
GtkListStore *store;
GtkTreeIter iter;
const char *first;
const char *last;
first = gtk_entry_get_text(GTK_ENTRY(f_entry));
last = gtk_entry_get_text(GTK_ENTRY(l_entry));
store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(list)));
gtk_list_store_append(store, &iter);
gtk_list_store_set(store, &iter, FIRST_NAME, first, LAST_NAME, last, -1);
}
And here is the equivalent in my application.
The enum:
enum {
ID_ALIAS,
N_COL
};
The variables (only those significant for the example):
static GtkWidget *list_pas;
static GtkWidget *list_key;
The setup of a list (almost identycle, except of passing the column name in the parameter and usage of only one column):
static GtkWidget *setup_list(char *typ)
{
GtkWidget *sc_win;
GtkWidget *list;
GtkListStore *store;
GtkCellRenderer *cell;
GtkTreeViewColumn *column;
sc_win = gtk_scrolled_window_new(NULL, NULL);
gtk_widget_set_usize(sc_win, 250, 150);
store = gtk_list_store_new(N_COL, G_TYPE_STRING, G_TYPE_STRING);
list = gtk_tree_view_new_with_model(GTK_TREE_MODEL(store));
cell = gtk_cell_renderer_text_new();
column = gtk_tree_view_column_new_with_attributes(typ, cell, "text", ID_ALIAS, NULL);
gtk_tree_view_append_column(GTK_TREE_VIEW(list), column);
// scrolls
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sc_win), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
gtk_container_add(GTK_CONTAINER(sc_win), list);
// free the store variable and return the scrolled window pointer
g_object_unref(G_OBJECT(store));
return sc_win;
}
The function which adds an element (in data there is a string of the element to add to the list and in the widget there is scrolled window which contains proper list):
static void list_add_cb(GtkWidget* widget, gpointer data)
{
GtkListStore *store;
GtkTreeIter iter;
store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(widget)));
gtk_list_store_append(store, &iter);
gtk_list_store_set(store, &iter, ID_ALIAS, (char *) data*, -1);
}
It does not work because of following errors I get everytime MySQL function tryes to write the data in their fields:
(app_0:3642): GLib-GObject-WARNING **: invalid cast from `GtkScrolledWindow' to `GtkTreeView'
(app_0:3642): Gtk-CRITICAL **: IA__gtk_tree_view_get_model: assertion `GTK_IS_TREE_VIEW (tree_view)' failed
(app_0:3642): Gtk-CRITICAL **: IA__gtk_list_store_append: assertion `GTK_IS_LIST_STORE (list_store)' failed
(app_0:3642): Gtk-CRITICAL **: IA__gtk_list_store_set_valist: assertion `GTK_IS_LIST_STORE (list_store)' failed
Here is how the function of adding a row is called:
list_add_cb(list, row[i] ? row[i] : "NULL");
I will also say that when I printf the row[i] ? row[i] : "NULL" I get correct value.
The MySQL part of my application works more than fine. The only warning I get while compilation is useless class storage specifier in empty declaration which I researched and here on stackoverflow.com I have learned this has nothing to do with this problem.
The other difference is I'm creating mutliple lists in my application. To verify if this was the source of the problem I have deleted all the lists except one single list and this changed nothing.
I've been also trying to charge the list with input fields and a button trigger, but this hasn't change anything. I've also tryed reordering declarations of the variables with the enum this had none effect on the result neither.
I haven't found anything usefull, I'm out of ideas, please help. I've been trying to explain this as clearly as possible, please ask question and correct me and my post. Thanks.
