Questions about Gtkmm/Libglademm

[Timo-13]

Hello, I wrote a program with PyGTK and Glade, but since I'm learning
C++ for some time now, I want to convert my Python porgram to C++.

I looked trough the few examples and I manage to use my old Glade file
and connect it with C++ code, so that's good.

But what I don't get from the examples is the glade signal handling. In
Glade, I give all  widgets already a signal. So the close button gets:
on_close_clicked. In Python/PyGTK this can be simply connected by making
a dictionary, like:
    dic = { "on_close_clicked" : gtk.main_quit }
    self.wTree.signal_autoconnect(dic)
containing all the signals.

But in the Libglademm examples, they always use lines of code for each
widget to connect the signals, like:
    Gtk::Button* pButton = 0;
    refXml->get_widget("quit_button", pButton);
    if(pButton)
      pButton->signal_clicked().connect(
sigc::ptr_fun(&on_button_clicked) );

Isn't there a way to read the signals set in the glade file? That would
save some repeating code.

Timo
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[Hubert Figuiere-2]

On Sat, 2008-05-10 at 21:56 +0200, Timo wrote:

> But what I don't get from the examples is the glade signal handling.
> In
> Glade, I give all  widgets already a signal. So the close button gets:
> on_close_clicked. In Python/PyGTK this can be simply connected by
> making
> a dictionary, like:
>     dic = { "on_close_clicked" : gtk.main_quit }
>     self.wTree.signal_autoconnect(dic)
> containing all the signals.
>
> But in the Libglademm examples, they always use lines of code for each
> widget to connect the signals, like:
>     Gtk::Button* pButton = 0;
>     refXml->get_widget("quit_button", pButton);
>     if(pButton)
>       pButton->signal_clicked().connect(
> sigc::ptr_fun(&on_button_clicked) );
>
> Isn't there a way to read the signals set in the glade file? That
> would
> save some repeating code.

No because C++ is a static language that does not allow symbolic lookup
of methods.


Hub

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[Murray Cumming]

On Sat, 2008-05-10 at 16:42 -0400, Hubert Figuiere wrote:
> > Isn't there a way to read the signals set in the glade file? That
> > would
> > save some repeating code.
>
> No because C++ is a static language that does not allow symbolic lookup
> of methods.

It's not entirely impossible but I consider it very very difficult. I'm
always open to patches to implement it, but I don't expect to ever
achieve it myself.

--
Murray Cumming
murrayc@...
www.murrayc.com
www.openismus.com

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[Hubert Figuiere-2]

On Sun, 2008-05-11 at 20:51 +0200, Murray Cumming wrote:

> > > Isn't there a way to read the signals set in the glade file? That
> > > would
> > > save some repeating code.
> >
> > No because C++ is a static language that does not allow symbolic
> lookup
> > of methods.
>
> It's not entirely impossible but I consider it very very difficult.
> I'm
> always open to patches to implement it, but I don't expect to ever
> achieve it myself.

That's why Qt has moc :-)

Hub

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