Re: TreeView with right-click

[Edd Dawson <edd nunswithguns net>]

Hi Paul,

Paul Davis wrote:
> Hey,
>
> I'm banging my head against a wall trying to implement the infamous 
> TreeView right-click.
>
> I understand how and what the signal handlers are doing, and I seem to 
> be getting screwed because TreeView insists on returning true from its 
> signal handling (Thus preventing signal handlers to do anything 
> afterwards).
>
> Other than break down and inhert from TreeView to provide a selection 
> update, is there anyway to accomplish this?

Here's how I do it. I'm not sure if it's the 'right' way but it's worked for me:

#include <gtkmm.h>

struct RecordDef : Gtk::TreeModel::ColumnRecord
{
    RecordDef() { add(number); }
    Gtk::TreeModelColumn<int> number;
};

class TestWindow : public Gtk::Window
{
    public:
        TestWindow() :
            record_def_(),
            model_(Gtk::ListStore::create(record_def_))
        {
            view_.add_events(Gdk::BUTTON_PRESS_MASK);
            view_.signal_button_press_event().connect(
                sigc::mem_fun(*this, &TestWindow::on_press),
                false
            );

            view_.set_model(model_);
            view_.append_column("Number", record_def_.number);
            add(view_);

            for (unsigned i = 0; i != 4; ++i) model_->append();

            show_all_children();
        };

    protected:
        bool on_press(GdkEventButton *event)
        {
            if (event->type == GDK_BUTTON_PRESS &&
                event->button == 3)
            {
                // Might want to call default handler here
                // to update selection etc
                Gtk::MessageDialog("hello!").run();
                return true; // event fully handled
            }
            return false; // event not fully handled
        }

    private:
        RecordDef record_def_;
        Glib::RefPtr<Gtk::ListStore> model_;
        Gtk::TreeView view_;
};


int main(int argc, char **argv)
{
    Gtk::Main kit(argc, argv);
    TestWindow window;
    Gtk::Main::run(window);

    return 0;
}


Kind regards,

Edd