Gtk::Application::create() calls gtk_init(), which calls
setlocale(LC_ALL, ""). The call to setlocale() affects the sort order of
Glib::ustring. Such strings are compared by calls to g_utf8_collate(). I
don't understand why a period (.) is ignored when strings are sorted
according to the rules of the user-specified locale (which in my case is
sv_SE.UTF-8).
You can avoid the strange sort order by using a std::map<std::string,
Glib::ustring> instead of a std::map<Glib::ustring, Glib::ustring>,
provided all your map's keys contain only ascii characters.
Kjell
Den 2015-04-09 12:56, Glus Xof skrev:
2015-04-08 21:33 GMT+02:00 Glus Xof <gtg...@gmail.com
<mailto:gtg...@gmail.com>>:
Hi guys,
I write a simple code (see at the bottom) to ask you why the order
sequence of values listed in the 'treeview' and in the "2nd
Sequence" don't correspond with the "1st Sequence"...
I mean, in the "1st Sequence" I get,
.1 ==> Point -- One
.2 ==> Point -- Two
.3 ==> Point -- Three
01 ==> Zero -- One
02 ==> Zero -- Two
11 ==> One -- One
Which is the desired sequence order... but in the "2nd..."
(elaborated in a Gtk Application context...)
01 * > Zero -- One
02 * > Zero -- Two
.1 * > Point -- One
11 * > One -- One
.2 * > Point -- Two
.3 * > Point -- Three
What happens, here ??
Can't yet understand why the sign pointer (.) seems not to be
significant at Glib::ustring key comparisons when std::map values are
extracted when iterate...
How can manage it ?
Glus
----
#include <gtkmm.h>
#include <iostream>
#include <map>
class MainWindow
:
public Gtk::Window
{
public:
MainWindow();
virtual ~MainWindow();
private:
void update_values();
void fill_treeview();
void on_button_quit_clicked();
std::map<Glib::ustring, Glib::ustring> my_map2;
// Gtkmm widgets...
Gtk::ScrolledWindow scrwindow;
Gtk::TreeView treeview;
Gtk::Box vbox;
Gtk::ButtonBox bbox;
Gtk::Button button_quit;
class ModelColumns
:
public Gtk::TreeModelColumnRecord
{
public:
ModelColumns()
{
add (nid);
add (code);
add (vlue);
}
Gtk::TreeModelColumn<gint> nid;
Gtk::TreeModelColumn<Glib::ustring> code;
Gtk::TreeModelColumn<Glib::ustring> vlue;
}
model_columns;
Glib::RefPtr<Gtk::ListStore> refListStore;
Gtk::TreeRow row;
};
MainWindow::MainWindow()
:
vbox (Gtk::ORIENTATION_VERTICAL),
button_quit ("Quit"),
refListStore (Gtk::ListStore::create (model_columns))
{
set_title ("TreeView Test");
set_border_width (10);
treeview.set_enable_search (false);
treeview.set_model (refListStore);
treeview.append_column ("Nº Id", model_columns.nid);
treeview.append_column ("Code", model_columns.code);
treeview.append_column ("Value", model_columns.vlue);
if (Gtk::CellRenderer * c_nid =
treeview.get_column_cell_renderer (0))
c_nid->set_alignment (0.5, 0.0);
if (Gtk::CellRenderer * c_code =
treeview.get_column_cell_renderer (1))
c_code->set_alignment (0.5, 0.0);
scrwindow.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_NEVER);
scrwindow.add (treeview);
bbox.set_margin_top (10);
bbox.pack_start (button_quit, Gtk::PACK_SHRINK);
bbox.set_layout (Gtk::BUTTONBOX_END);
button_quit.signal_clicked().connect (
sigc::mem_fun (*this, &MainWindow::on_button_quit_clicked));
vbox.pack_start (scrwindow);
vbox.pack_start (bbox, Gtk::PACK_SHRINK);
add (vbox);
fill_treeview();
show_all_children();
}
void
MainWindow::update_values()
{
my_map2.insert (std::pair<Glib::ustring, Glib::ustring> ("02",
"Zero -- Two"));
my_map2.insert (std::pair<Glib::ustring, Glib::ustring> (".2",
"Point -- Two"));
my_map2.insert (std::pair<Glib::ustring, Glib::ustring> ("11",
"One -- One"));
my_map2.insert (std::pair<Glib::ustring, Glib::ustring> ("01",
"Zero -- One"));
my_map2.insert (std::pair<Glib::ustring, Glib::ustring> (".1",
"Point -- One"));
my_map2.insert (std::pair<Glib::ustring, Glib::ustring> (".3",
"Point -- Three"));
}
void
MainWindow::fill_treeview()
{
if (!refListStore->children().empty())
refListStore->clear();
update_values();
std::cout << "2nd Sequence:" << std::endl;
// C++11 for...
for (auto &it : my_map2)
{
std::cout << it.first << " * > " << it.second << std::endl;
row = *(refListStore->append());
row[model_columns.nid] = refListStore->children().size();
row[model_columns.code] = it.first;
row[model_columns.vlue] = it.second;
}
}
void
MainWindow::on_button_quit_clicked()
{
hide();
}
MainWindow::~MainWindow()
{
}
int main()
{
std::map<Glib::ustring, Glib::ustring> my_map1;
my_map1.insert (std::pair<Glib::ustring, Glib::ustring> ("02",
"Zero -- Two"));
my_map1.insert (std::pair<Glib::ustring, Glib::ustring> (".2",
"Point -- Two"));
my_map1.insert (std::pair<Glib::ustring, Glib::ustring> ("11",
"One -- One"));
my_map1.insert (std::pair<Glib::ustring, Glib::ustring> ("01",
"Zero -- One"));
my_map1.insert (std::pair<Glib::ustring, Glib::ustring> (".1",
"Point -- One"));
my_map1.insert (std::pair<Glib::ustring, Glib::ustring> (".3",
"Point -- Three"));
std::cout << "1st Sequence:" << std::endl;
// C++11 for...
for (auto &it : my_map1)
std::cout << it.first << " ==> " << it.second << std::endl;
std::cout << std::endl;
Glib::RefPtr<Gtk::Application> app = Gtk::Application::create();
MainWindow main_window;
return app->run (main_window);
}
----
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