diff --git a/tui/src/lib.rs b/tui/src/lib.rs
index 081928c..39d3c59 100644
--- a/tui/src/lib.rs
+++ b/tui/src/lib.rs
@@ -1,8 +1,4 @@
-#![feature(type_changing_struct_update)]
-#![feature(trait_alias)]
-#[cfg(test)] mod tui_test;
-mod tui_engine; pub use self::tui_engine::*;
-mod tui_content; pub use self::tui_content::*;
+#![feature(type_changing_struct_update, trait_alias)]
 pub use ::{tengri_input, tengri_output, ratatui, crossterm, palette, better_panic};
 pub(crate) use ::{
     dizzle::*,
@@ -25,5 +21,42 @@ pub(crate) use ::{
         event::{Event, KeyEvent, KeyCode, KeyModifiers, KeyEventKind, KeyEventState},
     }
 };
-
-
+mod tui_engine;  pub use self::tui_engine::*;
+mod tui_content; pub use self::tui_content::*;
+#[cfg(test)] mod tui_test {
+    use crate::*;
+    #[test] fn test_tui_engine () -> Usually<()> {
+        //use std::sync::{Arc, RwLock};
+        struct TestComponent(String);
+        impl Content<TuiOut> for TestComponent {
+            fn content (&self) -> impl Draw<TuiOut> {
+                Some(self.0.as_str())
+            }
+        }
+        impl Handle<TuiIn> for TestComponent {
+            fn handle (&mut self, _from: &TuiIn) -> Perhaps<bool> {
+                Ok(None)
+            }
+        }
+        let engine = Tui::new()?;
+        engine.read().unwrap().exited.store(true, std::sync::atomic::Ordering::Relaxed);
+        let state = TestComponent("hello world".into());
+        let _state = std::sync::Arc::new(std::sync::RwLock::new(state));
+        //engine.run(&state)?;
+        Ok(())
+    }
+    //#[test] fn test_parse_key () {
+        ////use KeyModifiers as Mods;
+        //let _test = |x: &str, y|assert_eq!(KeyMatcher::new(x).build(), Some(Event::Key(y)));
+        ////test(":x",
+            ////KeyEvent::new(KeyCode::Char('x'), Mods::NONE));
+        ////test(":ctrl-x",
+            ////KeyEvent::new(KeyCode::Char('x'), Mods::CONTROL));
+        ////test(":alt-x",
+            ////KeyEvent::new(KeyCode::Char('x'), Mods::ALT));
+        ////test(":shift-x",
+            ////KeyEvent::new(KeyCode::Char('x'), Mods::SHIFT));
+        ////test(":ctrl-alt-shift-x",
+            ////KeyEvent::new(KeyCode::Char('x'), Mods::CONTROL | Mods::ALT | Mods::SHIFT ));
+    //}
+}
diff --git a/tui/src/tui.rs b/tui/src/tui.rs
deleted file mode 100644
index d017dff..0000000
--- a/tui/src/tui.rs
+++ /dev/null
@@ -1,45 +0,0 @@
-use crate::*;
-
-#[cfg(feature = "dsl")] 
-pub fn evaluate_output_expression_tui <'a, S> (
-    state: &S, mut output: &mut TuiOut, expr: impl DslExpr + 'a
-) -> Usually<bool> where
-    S: View<TuiOut, ()>
-        + for<'b>DslNs<'b, bool>
-        + for<'b>DslNs<'b, u16>
-        + for<'b>DslNs<'b, Color>
-{
-    // See `tengri_output::evaluate_output_expression`
-    let head = expr.head()?;
-    let mut frags = head.src()?.unwrap_or_default().split("/");
-    let args = expr.tail();
-    let arg0 = args.head();
-    let tail0 = args.tail();
-    let arg1 = tail0.head();
-    let tail1 = tail0.tail();
-    let arg2 = tail1.head();
-    match frags.next() {
-
-        Some("text") => if let Some(src) = args?.src()? { output.place(&src) },
-
-        Some("fg") => {
-            let arg0 = arg0?.expect("fg: expected arg 0 (color)");
-            output.place(&Tui::fg(
-                DslNs::<Color>::from(state, arg0)?.unwrap_or_else(||panic!("fg: {arg0:?}: not a color")),
-                Thunk::new(move|output: &mut TuiOut|state.view(output, &arg1).unwrap()),
-            ))
-        },
-
-        Some("bg") => {
-            let arg0 = arg0?.expect("bg: expected arg 0 (color)");
-            output.place(&Tui::bg(
-                DslNs::<Color>::from(state, arg0)?.unwrap_or_else(||panic!("bg: {arg0:?}: not a color")),
-                Thunk::new(move|output: &mut TuiOut|state.view(output, &arg1).unwrap()),
-            ))
-        },
-
-        _ => return Ok(false)
-
-    };
-    Ok(true)
-}
diff --git a/tui/src/tui_engine.rs b/tui/src/tui_engine.rs
index 4fce13a..52a84a0 100644
--- a/tui/src/tui_engine.rs
+++ b/tui/src/tui_engine.rs
@@ -102,3 +102,47 @@ impl<T: TuiWidget + Send + Sync + 'static> TuiRun<T> for Arc<RwLock<Tui>> {
         Ok(())
     }
 }
+
+#[cfg(feature = "dsl")] 
+pub fn evaluate_output_expression_tui <'a, S> (
+    state: &S, mut output: &mut TuiOut, expr: impl DslExpr + 'a
+) -> Usually<bool> where
+    S: View<TuiOut, ()>
+        + for<'b>DslNs<'b, bool>
+        + for<'b>DslNs<'b, u16>
+        + for<'b>DslNs<'b, Color>
+{
+    // See `tengri_output::evaluate_output_expression`
+    let head = expr.head()?;
+    let mut frags = head.src()?.unwrap_or_default().split("/");
+    let args = expr.tail();
+    let arg0 = args.head();
+    let tail0 = args.tail();
+    let arg1 = tail0.head();
+    let tail1 = tail0.tail();
+    let arg2 = tail1.head();
+    match frags.next() {
+
+        Some("text") => if let Some(src) = args?.src()? { output.place(&src) },
+
+        Some("fg") => {
+            let arg0 = arg0?.expect("fg: expected arg 0 (color)");
+            output.place(&Tui::fg(
+                DslNs::<Color>::from(state, arg0)?.unwrap_or_else(||panic!("fg: {arg0:?}: not a color")),
+                Thunk::new(move|output: &mut TuiOut|state.view(output, &arg1).unwrap()),
+            ))
+        },
+
+        Some("bg") => {
+            let arg0 = arg0?.expect("bg: expected arg 0 (color)");
+            output.place(&Tui::bg(
+                DslNs::<Color>::from(state, arg0)?.unwrap_or_else(||panic!("bg: {arg0:?}: not a color")),
+                Thunk::new(move|output: &mut TuiOut|state.view(output, &arg1).unwrap()),
+            ))
+        },
+
+        _ => return Ok(false)
+
+    };
+    Ok(true)
+}
diff --git a/tui/src/tui_test.rs b/tui/src/tui_test.rs
index dbfeefd..e69de29 100644
--- a/tui/src/tui_test.rs
+++ b/tui/src/tui_test.rs
@@ -1,35 +0,0 @@
-use crate::*;
-#[test] fn test_tui_engine () -> Usually<()> {
-    //use std::sync::{Arc, RwLock};
-    struct TestComponent(String);
-    impl Content<TuiOut> for TestComponent {
-        fn content (&self) -> impl Draw<TuiOut> {
-            Some(self.0.as_str())
-        }
-    }
-    impl Handle<TuiIn> for TestComponent {
-        fn handle (&mut self, _from: &TuiIn) -> Perhaps<bool> {
-            Ok(None)
-        }
-    }
-    let engine = Tui::new()?;
-    engine.read().unwrap().exited.store(true, std::sync::atomic::Ordering::Relaxed);
-    let state = TestComponent("hello world".into());
-    let _state = std::sync::Arc::new(std::sync::RwLock::new(state));
-    //engine.run(&state)?;
-    Ok(())
-}
-//#[test] fn test_parse_key () {
-    ////use KeyModifiers as Mods;
-    //let _test = |x: &str, y|assert_eq!(KeyMatcher::new(x).build(), Some(Event::Key(y)));
-    ////test(":x",
-        ////KeyEvent::new(KeyCode::Char('x'), Mods::NONE));
-    ////test(":ctrl-x",
-        ////KeyEvent::new(KeyCode::Char('x'), Mods::CONTROL));
-    ////test(":alt-x",
-        ////KeyEvent::new(KeyCode::Char('x'), Mods::ALT));
-    ////test(":shift-x",
-        ////KeyEvent::new(KeyCode::Char('x'), Mods::SHIFT));
-    ////test(":ctrl-alt-shift-x",
-        ////KeyEvent::new(KeyCode::Char('x'), Mods::CONTROL | Mods::ALT | Mods::SHIFT ));
-//}