Re: Gtk::Button not actionable?

On Tue, 2014-12-02 at 18:12 +0100, ax487 wrote:
Hello all,

I noticed an odd discrepancy between gtk and gtkmm recently: It seems
that the GtkButton in gtk3 implements the GtkActionable interface,
meaning that I could attach use `gtk_actionable_set_action_name` to
attach a GAction to it. However, the gtkmm version, Gtk::Button does not
inherit from Gtk::Actionable. Therefore the functionality is not
available. There is a TODO in button.h:

//TODO: Derive from (and implement) Actionable when we can break ABI.

What does that mean? I thought that gtk3 and gtkmm3 were kept in sync,
i.e. gtkmm3-3.14 would be feature-complete regarding gkt3-3.14? Is this
functionality going to be implemented (when)?

We can't add a base class to a C++ class without breaking ABI - that
generally means causing all applications that currently use that ABI to
crash. Obviously we don't want to do that. It can be done when we do a
parallel install such as when we went from gtkmm-2.4 to gtkmm-3.0, which
did not affect currently installed applications.

You can do this in the meantime:
gtk_actionable_set_action_name(theButton.gobj(), "somename");


Murray Cumming
murrayc murrayc com

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