Boxes in a frame

[jalqadir netscape net]

I have a class that derives from Gtk::Frame, which arranges its widgets in a vertical way, I need to add three horizontal  boxes to my class, but after using the member function add(widget*....) to add the three boxes and running the program I realize that I don't get the boxes displayed. Here is the snip code.

 --

class AddressFrame : virtual public Gtk::Frame{
private:

    ...

    Gtk::HBox* hboxOne;
    Gtk::HBox* hboxTwo;
    Gtk::HBox* hboxThree;

    ...

};

Address::Address{

   try{

        ...

        hboxOne         = Gtk::manage(new Gtk::HBox());
        hboxTwo         = Gtk::manage(new Gtk::HBox());
        hboxThree       = Gtk::manage(new Gtk::HBox());

        ...

  }catch ( std::bad_alloc & x ) {throw;}

  ...

  this->add(dynamic_cast<Gtk::Widget&>(*hboxOne));
  this->add(dynamic_cast<Gtk::Widget&>(*hboxTwo));
  this->add(dynamic_cast<Gtk::Widget&>(*hboxThree));

  ...
}

 

I remember reading that when using the add() method one can only add one widget to the container, but after looking for its pack_start() counter part, I realize that this container does not have such member function.

 

What can I do to solve this problem?

 

TIA

 

 

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