Connect internals

[StephanvanSchaik]

As I am running into issues with the current implementation of Connect (cfr. gtk-rs/gtk#30), I am looking at the implementation to see if I can pin-point the origin of my issues. However, within that code you can find:

ffi::glue_signal_connect(
                self.unwrap_gobject(),
                signal_name.borrow_to_glib().0,
                Some(trampoline),
                user_data_ptr
            );

Which can also be found among the FFI defintions:

    pub fn glue_signal_connect(g_object: *mut C_GObject,
                               signal: *const c_char,
                               func: Option<extern "C" fn()>,
                               user_data: *const c_void);

What exactly is glue_signal_connect? I'm asking because I can't seem to find this in Glib.

Furthermore, the Signal trait seems to have a fetch_cb method. What should this be used for? As I don't see it being used (directly) at the moment. (They are used to create the trampolines).

[gkoz]

This glue function lives in gtk_glue.c. I can't say there's much point to having this glue function. The problems with closures have been discussed here: jeremyletang/rgtk#28

[GuillaumeGomez]

@jeremyletang will explain this better than me.

[gkoz]

I believe this question has been resolved in the process of the signals reform.

[GuillaumeGomez]

I think too. I close it.