Re: How to use specific methods with a generic widget pointer?

[Guillaume Brocker <guillaume brocker digital-trainers com>]

Paulo Flabiano Smorigo a écrit :
> Hello,
>
> What can I do to solve the following error? I need to use a different
> kind of pointer?
>
> The code:
> Gtk::ToggleButton btnOK;
> Gtk::Widget *ptrElement = NULL;
>
> ptrElement = &btnOK;
>
> ptrElement->set_active(true);
>
> The error:
> error: ‘class Gtk::Widget’ has no member named ‘set_active’

Gtk::Widget has no member ‘set_active’. This member is specific to 
Gtk::ToggleButton and derived classes. Wy don't you call 
‘btnOK.set_active’ directly ?

> Thanks in advance,
> Paulo Flabiano Smorigo

Guillaume