[gtkmm] ComboxText : remove a string ?

[Gauthier <oogothoo yahoo fr>]

Hi all,

I use Gtk::ComboBoxText widget from Gtkmm-2.4 an I want to delete a
string (or all). What function use to delete ? get_model() and use
TreeModel to delete but how ?

I enclose an example of program.

Gauthier.

// g++ toto.cc `pkg-config --libs --cflags gtkmm-2.4`

#include <gtkmm.h>


class MyDialog : public Gtk::Dialog
{
public:
    MyDialog();
    virtual ~MyDialog() {}

private:
    void on_combo1_changed();
    void on_combo2_changed();

    Gtk::HBox         m_hbox;
    Gtk::ComboBoxText m_combo1;
    Gtk::ComboBoxText m_combo2;
};

MyDialog::MyDialog()
{
    m_hbox.add(m_combo1);
    m_hbox.add(m_combo2);
    get_vbox()->add(m_hbox);

    m_combo1.append_text("1");
    m_combo1.append_text("2");
    m_combo1.set_active(0);
    on_combo1_changed();

    m_combo1.signal_changed().connect(
        sigc::mem_fun(*this, &MyDialog::on_combo1_changed));
    m_combo2.signal_changed().connect(
        sigc::mem_fun(*this, &MyDialog::on_combo2_changed));

    show_all();
}

void MyDialog::on_combo1_changed()
{
    // HOWTO CLEAN m_combo2 ?
    
    if (m_combo1.get_active_text() == "1") {
        m_combo2.append_text("1 bis");
        m_combo2.append_text("2 bis");
        m_combo2.append_text("3 bis");
    } else {
        m_combo2.append_text("1 ok");
        m_combo2.append_text("2 ok");
        m_combo2.append_text("3 ok");
        m_combo2.append_text("4 ok");
        m_combo2.append_text("5 ok");
        m_combo2.append_text("6 ok");
        m_combo2.append_text("7 ok");
        m_combo2.append_text("8 ok");
    }
    m_combo2.set_active(0);
}

void MyDialog::on_combo2_changed()
{
    g_print("on_combo2_changed %s\n", m_combo2.get_active_text().c_str());
}

int main(int argc, char** argv)
{
    Gtk::Main app(&argc, &argv);

    MyDialog dial;

    app.run(dial);
}