some small step to implement events listener

src/main.rs

@@ -12,7 +12,10 @@ use nvim::Nvim;
 
 fn main() {
     let ui = Ui::new();
-    let nvim = Nvim::start(ui).expect("Can't start nvim instance");
     ui.show();
+
+    Nvim::start(ui).expect("Can't start nvim instance");
+
+    gtk::main();       
 }
 

src/nvim.rs

@@ -1,6 +1,7 @@
 use neovim_lib::{Neovim, NeovimApi, Session};
 use std::io::{Result, Error, ErrorKind};
 use rmp::Value;
+use ui::Ui;
 
 pub struct Nvim {
     nvim: Neovim,
@@ -10,13 +11,12 @@ pub trait RedrawEvents {
 }
 
 impl Nvim {
-    pub fn start<F: RedrawEvents + Send + 'static> (redraw_cb: F) -> Result<Nvim> {
+    pub fn start(mut ui: Ui) -> Result<Nvim> {
         // let mut session = try!(Session::new_tcp("127.0.0.1:6666"));
         let mut session = try!(Session::new_child());
-
-        session.start_event_loop_cb(move |m, p| Nvim::cb(&redraw_cb, m, p));
-
         let mut nvim = Neovim::new(session);
+
+        nvim.session.start_event_loop_cb(move |m, p| Nvim::cb(&mut ui, m, p));
         // fix neovim --embed bug to start embed mode
         nvim.input("i").unwrap();
         try!(nvim.ui_attach(80, 24, true).map_err(|e| Error::new(ErrorKind::Other, e)));
@@ -24,7 +24,7 @@ impl Nvim {
         Ok(Nvim { nvim: nvim })
     }
 
-    fn cb<F: RedrawEvents>(readraw_cb: &F, method: &str, params: Vec<Value>) {
+    fn cb(ui: &mut Ui, method: &str, params: Vec<Value>) {
         if method == "redraw" {
             for ev in params {
                 if let Value::Array(ev_args) = ev {

src/ui.rs

@@ -53,7 +53,6 @@ impl Ui {
             Inhibit(false)
         });
 
-        gtk::main();       
     }
 
     fn gtk_draw(drawing_area: &DrawingArea, ctx: &cairo::Context) -> Inhibit {