Re: Problem Gtk::SpinButton and Gtk::Adjustment causing segfault

[Paul Davis <paul linuxaudiosystems com>]

On Sun, 2008-02-10 at 18:29 +0000, Joe wrote:
> Right, so I've derived a Gtk::Frame to create the right pane of my gtkmm
> application.
> 
> It contains some Gtk::SpinButtons and I also created a Gtk::Adjustment
> for each one.
> 
> Now I'm quite new so at first I didn't realise I had to use
> Gtk::Adjustment's so I didn't do it and everything worked fine except
> the SpinButtons were unusable.
> 
> After adding them to the class like this:
> 
> Gtk::SpinButton fsize_spin;
> Gtk::Adjustment fsize_adj;
> 
> and putting them into the constructor like this:
> 
> Right_Pane::Right_Pane()
>  : fsize_adj(1024,1,1073741824,1,1024,0),
>    fsize_spin(fsize_adj)
> {
> 	// the rest
> }
> 
> the program segfaults with:
> 
> Glib::ConstructParams::ConstructParams(): invalid unclassed object
> pointer for value type `GtkAdjustment'

are you trying to create a static instance of a Right_Pane ?

Gtk::Main::init() must be called before any Gtk objects can be created.