errors fixed, renders nothing :(

crates/tek_core/src/engine/collect.rs

@@ -13,12 +13,11 @@ impl<'a, E: Engine> Render<E> for Collected<'a, E> {
         }
     }
 }
-
-impl<'a, E: Engine> Layout<E> for &Collected<'a, E> {
+impl<'a, E: Engine> Layout<E> for Collected<'a, E> {
     fn layout (&self, area: E::Area) -> Perhaps<E::Area> {
-        match *self {
-            Collected::Box(inner) => (*inner).layout(area),
-            Collected::Ref(inner) => (*inner).layout(area),
+        match self {
+            Self::Box(inner) => (*inner).layout(area),
+            Self::Ref(inner) => (*inner).layout(area),
         }
     }
 }

crates/tek_core/src/engine/layout.rs

@@ -14,6 +14,21 @@ pub fn center_box (area: Rect, w: u16, h: u16) -> Rect {
 pub trait Layout<E: Engine>: Render<E> {
     fn layout (&self, area: E::Area) -> Perhaps<E::Area>;
 }
+
+impl<E: Engine, T: Layout<E>> Layout<E> for &T {
+    fn layout (&self, area: E::Area) -> Perhaps<E::Area> {
+        (*self).layout(area)
+    }
+}
+impl<E: Engine, T: Layout<E>> Layout<E> for Option<T> {
+    fn layout (&self, area: E::Area) -> Perhaps<E::Area> {
+        match self {
+            Some(layout) => layout.layout(area),
+            None => Ok(None)
+        }
+    }
+}
+
 /// Enforce minimum size of drawing area
 pub enum Min<U: Number, L> { W(U, L), H(U, L), WH(U, U, L), }
 /// Enforce maximum size of drawing area

crates/tek_core/src/engine/render.rs

@@ -5,6 +5,12 @@ pub trait Render<E: Engine>: Send + Sync {
     fn render (&self, to: &mut E) -> Perhaps<E::Rendered>;
 }
 
+impl<E: Engine> Render<E> for () {
+    fn render (&self, to: &mut E) -> Perhaps<E::Rendered> {
+        Ok(None)
+    }
+}
+
 /// Options can be rendered optionally.
 impl<R, E: Engine> Render<E> for Option<R> where R: Render<E> {
     fn render (&self, to: &mut E) -> Perhaps<E::Rendered> {

crates/tek_core/src/tui.rs

@@ -198,20 +198,6 @@ pub enum TuiEvent {
     // Jack(JackEvent)
 }
 
-/// Rendering unit struct to Ratatui returns zero-sized [Area] at render coordinates.
-impl Render<Tui> for () {
-    fn render (&self, to: &mut Tui) -> Perhaps<[u16;4]> {
-        self.layout(to.area())
-    }
-}
-
-/// Layout of unit struct in Ratatui is zero-sized [Area] at render coordinates.
-impl Layout<Tui> for () {
-    fn layout (&self, area: [u16;4]) -> Perhaps<[u16;4]> {
-        Ok(Some([area.x(), area.y(), 0, 0]))
-    }
-}
-
 impl Area<u16> for Rect {
     fn x (&self) -> u16 { self.x }
     fn y (&self) -> u16 { self.y }

crates/tek_core/src/tui/tui_layout.rs

@@ -1,14 +1,5 @@
 use crate::*;
 
-impl<T: Layout<Tui>> Layout<Tui> for Option<T> {
-    fn layout (&self, area: [u16;4]) -> Perhaps<[u16;4]> {
-        match self {
-            Some(layout) => layout.layout(area),
-            None => ().layout(area)
-        }
-    }
-}
-
 impl<'a> Render<Tui> for Layers<'a, Tui> {
     fn render (&self, to: &mut Tui) -> Perhaps<[u16;4]> {
         let area = to.area();

crates/tek_sequencer/src/arranger.rs

@@ -99,6 +99,11 @@ impl ArrangerViewMode {
         }
     }
 }
+impl Layout<Tui> for Arranger<Tui> {
+    fn layout (&self, area: [u16;4]) -> Perhaps<[u16;4]> {
+        todo!()
+    }
+}
 /// Render arranger to terminal
 impl Render<Tui> for Arranger<Tui> {
     fn render (&self, to: &mut Tui) -> Perhaps<[u16;4]> {

crates/tek_sequencer/src/sequencer_view.rs

@@ -1,5 +1,10 @@
 use crate::*;
 
+impl Layout<Tui> for Sequencer {
+    fn layout (&self, area: [u16;4]) -> Perhaps<[u16;4]> {
+        todo!()
+    }
+}
 impl<'a> Render<Tui> for Sequencer {
     fn render (&self, to: &mut Tui) -> Perhaps<[u16;4]> {
         self.horizontal_draw(to)?;

crates/tek_sequencer/src/sequencer_view_h.rs

@@ -5,19 +5,16 @@ impl Sequencer {
     const H_KEYS_OFFSET: usize = 5;
 
     pub(crate) fn horizontal_draw <'a> (&self, to: &mut Tui) -> Usually<()> {
-        let mut area = to.area();
+        let area = to.area();
         Split::down()
             .add_ref(&SequenceName(&self))
             .add_ref(&SequenceRange)
             .add_ref(&SequenceLoopRange)
             .add_ref(&SequenceNoteRange)
-            .render(to.with_area(area.x(), area.y(), area.h(), 10))?;
-        area.x = area.x() + 10;
-        area.width = area.w().saturating_sub(10);
-        area.height = area.h().min(66);
+            .render(to.with_area(area.x(), area.y(), 10, area.h()))?;
+        let area = [area.x() + 10, area.y(), area.w().saturating_sub(10), area.h().min(66)];
         Lozenge(Style::default().fg(Nord::BG2)).draw(to.with_rect(area))?;
-        area.x = area.x() + 1;
-        area.width = area.w().saturating_sub(1);
+        let area = [area.x() + 1, area.y(), area.w().saturating_sub(1), area.h()];
         Layered::new()
             .add_ref(&SequenceKeys(&self))
             .add_ref(&self.phrase.as_ref().map(|phrase|SequenceTimer(&self, phrase.clone())))

crates/tek_sequencer/src/transport_view.rs

@@ -2,22 +2,21 @@ use crate::*;
 
 const CORNERS: Corners = Corners(NOT_DIM_GREEN);
 
+impl Layout<Tui> for TransportToolbar {
+    fn layout (&self, area: [u16;4]) -> Perhaps<[u16;4]> {
+        Ok(Some([area.x(), area.y(), area.w(), 2]))
+    }
+}
+
 impl Render<Tui> for TransportToolbar {
     fn render (&self, to: &mut Tui) -> Perhaps<[u16;4]> {
-        let area = to.area();
-        let area = [area.x(), area.y(), area.w(), 2];
-        let area = Split::right()
+        Split::right()
             .add_ref(&self.playing)
             .add_ref(&self.bpm)
             .add_ref(&self.quant)
             .add_ref(&self.sync)
             .add_ref(&self.clock)
-            .render(to.with_rect(area))?;
-        //if self.is_focused() {
-            //fill_bg(buf, area, COLOR_BG0);
-            //CORNERS_DIM.draw(buf, area)?;
-        //}
-        Ok(area)
+            .render(to.with_rect(self.layout(to.area())?.unwrap()))
     }
 }