Re: Making Gtk::Button receive spin events (as per Gtk::SpinButton)

["Jonathon Jongsma" <jonathon jongsma gmail com>]

On 5/19/06, Nickolai Dobrynin <ndobrynin gmail com> wrote:
> Hi.
>
>  I am trying to re-implement Gtk::SpinButton using a container to start
> with.  As part of the
>  re-implementation, I need to emulate the scrolling (a.k.a. spinning)
> functionality of the spin
>  entry.  Is there any way I can make a Gtk::Button receive these special
> spin events?  I
>  have this trivial piece of code below, but it doesn't do what I need.
> Anybody can please
>  point me in the right direction?  (I suspect I'm doing something utterly
> silly here).
>
>  class SpinButton : public Gtk::Button {
>  public:
>    SpinButton() { add_events(Gdk::SCROLL_MASK); }
>    SpinButton(const std::string& lbl) : Gtk::Button(lbl) {
> add_events(Gdk::SCROLL_MASK); }
>  protected:
>    virtual bool on_scroll_event (GdkEventScroll* e)
>    { std::cout << "This is never called" << std::endl; return
> Gtk::Button::on_scroll_event(e); }
>  };

I don't quite understand what you're trying to do here.  What are you
using to generate scroll events?  Is there any reason you can't just
use a Gtk::SpinButton?

Jonner