The documentation at
https://docs.gtk.org/gtk4/method.ColumnView.get_sorter.html suggests you
need a SortListModel
On Tue, Aug 23, 2022 at 4:32 AM Jackson Campolattaro via gtkmm-list <
gtkmm-list@gnome.org> wrote:
> Hello,
>
> I'm trying to use the Gtk ColumnView to show a custom ListModel in sorted
> order. I noticed that when I set a simple sorter for a column and then sort
> by that column, the order isn't changed. The UI allows me to switch between
> ascending and descending, but doing so doesn't reverse the list.
>
> I've created a simplified example, which is supposed to show the file
> paths in the current directory in alphabetical order, but doesn't:
>
> #include <gtkmm.h>
>> #include <giomm.h>
>>
>> class MyWindow : public Gtk::Window {
>> private:
>>
>> Glib::RefPtr<Gio::ListStore<Gio::File>> _listModel;
>> Glib::RefPtr<Gtk::SingleSelection> _selectionModel;
>>
>> Gtk::ColumnView _columnView;
>>
>> public:
>> MyWindow() {
>>
>> _listModel = Gio::ListStore<Gio::File>::create();
>> _selectionModel = Gtk::SingleSelection::create(_listModel);
>> _columnView.set_model(_selectionModel);
>>
>> auto files =
>> Gio::File::create_for_path(".")->enumerate_children();
>> Glib::RefPtr<Gio::FileInfo> fileInfo;
>> while ((fileInfo = files->next_file())) {
>>
>> _listModel->append(Gio::File::create_for_path(fileInfo->get_name()));
>> }
>>
>> auto _factory = Gtk::SignalListItemFactory::create();
>> _factory->signal_setup().connect([](auto listItem) {
>>
>> listItem->set_child(*Gtk::make_managed<Gtk::Label>("Placeholder!"));
>> });
>> _factory->signal_bind().connect([](auto listItem) {
>> auto data =
>> std::dynamic_pointer_cast<Gio::File>(listItem->get_item());
>> auto label = dynamic_cast<Gtk::Label
>> *>(listItem->get_child());
>> if (data && label) {
>> label->set_text(data->get_path());
>> label->set_xalign(0);
>> }
>> });
>>
>> auto column = Gtk::ColumnViewColumn::create("File Paths",
>> _factory);
>> _columnView.append_column(column);
>>
>> column->set_sorter(Gtk::StringSorter::create(
>> Gtk::ClosureExpression<Glib::ustring>::create([](auto
>> item) {
>> auto data =
>> std::dynamic_pointer_cast<Gio::File>(item);
>> return data->get_path();
>> })
>> ));
>> _columnView.sort_by_column(column, Gtk::SortType::ASCENDING);
>>
>> set_child(_columnView);
>> };
>> };
>>
>> int main(int argc, char *argv[]) {
>> auto app = Gtk::Application::create("org.gtkmm.examples.base");
>> return app->make_window_and_run<MyWindow>(argc, argv);
>> }
>>
>
> Perhaps this is a bug, but before I report it I wanted to make sure I'm
> not doing something wrong.
>
> Thanks,
>
> Jackson
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>
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