separate Input and Output impls

edn/examples/edn.rs

@@ -17,23 +17,27 @@ fn main () -> Usually<()> {
 pub struct Example(usize);
 
 impl EdnViewData<Tui> for &Example {
-    fn get_content <'a> (&'a self, sym: &'a str) -> RenderBox<'a, Tui> {
+    fn get_content <'a> (&'a self, sym: EdnItem<&'a str>) -> RenderBox<'a, Tui> {
         Box::new(Thunk::new(move||match sym {
-            ":hello-world" => "Hello world!",
-            ":hello" => "Hello",
-            ":world" => "world",
+            EdnItem::Sym(":hello-world") => "Hello world!",
+            EdnItem::Sym(":hello") => "Hello",
+            EdnItem::Sym(":world") => "world",
             _ => ""
         }))
     }
 }
 
-impl Content<Tui> for Example {
-    fn content (&self) -> impl Render<Tui> {
-        EdnView::new(self, EDN[self.0]).unwrap()
+impl Content<TuiOut> for Example {
+    fn content (&self) -> impl Render<TuiOut> {
+        Bsp::a(
+            &format!("{}", self.0),
+            EdnView::new(self, EDN[self.0])
+                .unwrap_or_else(|e|format!("Failed to render {}: {e}", self.0))
+        )
     }
 }
 
-impl Handle<Tui> for Example {
+impl Handle<TuiIn> for Example {
     fn handle (&mut self, input: &TuiIn) -> Perhaps<bool> {
         match input.event() {
             kpat!(Right) => self.0 = (self.0 + 1) % EDN.len(),

edn/examples/edn02.rs

@@ -22,10 +22,10 @@ impl EdnViewData<Tui> for &Example {
     }
 }
 
-impl Content<Tui> for Example {
-    fn content (&self) -> impl Render<Tui> {
+impl Content<TuiOut> for Example {
+    fn content (&self) -> impl Render<TuiOut> {
         EdnView::new(self, EDN).unwrap()
     }
 }
 
-impl Handle<Tui> for Example {}
+impl Handle<TuiIn> for Example {}