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Peter · GTK+ Geek Joined: 10 May 2008 Posts: 54

Guys. I have no idea why one code works and the other does not.
It DOES works when: In the tree creation I don't have g_object_unref(store) but all Gtk variable set to static.
It does NOT work when I have g_object_unref(store) in the fuction.
What is going on ?
Peter

Here is the code:

Code: (C)

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// THIS WORKS: it does not have g_object_unref(store);
// and the Gtk.. variables are set to static

void OkSignalTree(GtkWidget *window, int r) {
static GtkListStore *store;
static GtkTreeIter iter;
static GtkWidget *treeview, *scrolled_win;
static GtkCellRenderer *renderer;
static GtkTreeViewColumn *column;
static GtkTreeSelection *selection;
static GtkTreeModel *model;
int i, j, R, Ndata, click = 0, n;
gchar edtext[80];

treeview = lookup_widget (window, "Signaltree");
model = gtk_tree_view_get_model (GTK_TREE_VIEW (treeview));
Ndata = sizeof(SigNames)/sizeof(SigNames[0]);

if (r==STARTUP) {
NumSignals = 0;
NumSelSignals = 0;

store = gtk_list_store_new (N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING);

renderer = gtk_cell_renderer_text_new ();
column = gtk_tree_view_column_new_with_attributes ("Signal", renderer, "text", SIGNAME_COLUMN, NULL);
gtk_tree_view_column_set_resizable (column, TRUE);
gtk_tree_view_append_column (GTK_TREE_VIEW (treeview), column);

renderer = gtk_cell_renderer_text_new ();
column = gtk_tree_view_column_new_with_attributes ("Selected", renderer, "text", SIGUNIT_COLUMN, NULL);
gtk_tree_view_column_set_resizable (column, TRUE);
gtk_tree_view_append_column (GTK_TREE_VIEW (treeview), column);

selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(treeview));
gtk_tree_selection_set_mode ( selection, GTK_SELECTION_MULTIPLE );

//
{
// insert content
}
}
gtk_tree_view_set_model(GTK_TREE_VIEW(treeview), GTK_TREE_MODEL(store));
gtk_widget_show_all(treeview);
}

// THIS ONE DOES NOT WORK!!! it has: g_object_unref(store);
// The Gtk varables are not static as in most examples
void BADSignalTree(GtkWidget *window, int r) {
GtkListStore *store;
GtkTreeIter iter;
GtkWidget *treeview, *scrolled_win;
GtkCellRenderer *renderer;
GtkTreeViewColumn *column;
GtkTreeSelection *selection;
GtkTreeModel *model;
int i, j, R, Ndata, click = 0, n;
gchar edtext[80];

treeview = lookup_widget (window, "Signaltree");
model = gtk_tree_view_get_model (GTK_TREE_VIEW (treeview));
Ndata = sizeof(SigNames)/sizeof(SigNames[0]);

if (r==STARTUP) {
NumSignals = 0;
NumSelSignals = 0;

store = gtk_list_store_new (N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING);

renderer = gtk_cell_renderer_text_new ();
column = gtk_tree_view_column_new_with_attributes ("Signal", renderer, "text", SIGNAME_COLUMN, NULL);
gtk_tree_view_column_set_resizable (column, TRUE);
gtk_tree_view_append_column (GTK_TREE_VIEW (treeview), column);

renderer = gtk_cell_renderer_text_new ();
column = gtk_tree_view_column_new_with_attributes ("Selected", renderer, "text", SIGUNIT_COLUMN, NULL);
gtk_tree_view_column_set_resizable (column, TRUE);
gtk_tree_view_append_column (GTK_TREE_VIEW (treeview), column);

selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(treeview));
gtk_tree_selection_set_mode ( selection, GTK_SELECTION_MULTIPLE );

//
{
// insert content
}
}
gtk_tree_view_set_model(GTK_TREE_VIEW(treeview), GTK_TREE_MODEL(store));
g_object_unref(store);
gtk_widget_show_all(treeview);
}