wip: more edn rendering setup

edn/examples/edn02.rs

@@ -1,8 +1,20 @@
-use tek_edn::*;
+use tek_edn::{*, tek_layout::{*, tek_engine::{*, tui::{*, TuiRun}}}};
+use std::sync::{Arc, RwLock};
 
-const SOURCE: &'static str = include_str!("edn02.edn");
+const EDN: &'static str = include_str!("edn02.edn");
 
-fn main () {
-    Tui::run(Arc::new(RwLock::new(Demo::new())))?;
+fn main () -> Usually<()> {
+    let state = Arc::new(RwLock::new(Example));
+    Tui::new().unwrap().run(&state)?;
     Ok(())
 }
+
+pub struct Example;
+
+impl EdnLayout<Tui> for Example {
+    fn get_content <'a> (&'a self, sym: &'a str) -> Box<EdnRender<'a, Tui>> {
+        Box::new(Thunk::new(move||if sym == ":hello" { "Hello world!" } else { "" }))
+    }
+}
+
+impl Handle<Tui> for Example {}