Handling Signals: Base class or embedded?

[Matthias Kaeppler <nospam digitalraid com>]

Hello,

say I have a class, which derives from Widget. In this class, I have a 
TreeView, which takes pretty much the whole window area.
If I now click into this window, which object will fire an event, the 
Widget or the TreeView?

To specify my problem, is there a difference between this code:

class MyWidget: public Gtk::ScrolledWindow
{
    Gtk::TreeView view_;
    // ...
public:
    virtual bool on_button_press_event( GdkEventButton *event );
    // ...
};

// override base class handler
bool MyWidget::on_button_press_event( GdkEventButton *event )
{
   // ...
}

... and this code:

class MyWidget: public Gtk::ScrolledWindow
{
    Gtk::TreeView view_;
    // ...
public:
    void on_button_press_event( GdkEventButton *event );
    // ...
};

view_.signal_button_press_event().connect_notify( sigc::mem_fun( *this, 
&MyWidget::on_button_press_event ) );

void MyWidget::on_button_press_event( GdkEventButton *event )
{
   // ...
}

?

I am currently doing the first, just override the base class handler, 
but that doesn't seem to work. Or maybe I have to connect the overriden 
handler to the signal as well?

*confused*

--
Matthias Kaeppler