implement Measure component

crates/tek_core/src/space.rs

@@ -9,6 +9,7 @@ pub trait Coordinate: Send + Sync + Copy
     + Ord + PartialEq + Eq
     + Debug + Display + Default
     + From<u16> + Into<u16>
+    + Into<usize>
     + Into<f64>
 {
     fn minus (self, other: Self) -> Self {
@@ -29,6 +30,7 @@ impl<T> Coordinate for T where
         + Ord + PartialEq + Eq
         + Debug + Display + Default
         + From<u16> + Into<u16>
+        + Into<usize>
         + Into<f64>
 {}
 
@@ -87,12 +89,10 @@ pub trait Size<N: Coordinate> {
         }
     }
 }
-
 impl<N: Coordinate> Size<N> for (N, N) {
     fn x (&self) -> N { self.0 }
     fn y (&self) -> N { self.1 }
 }
-
 impl<N: Coordinate> Size<N> for [N;2] {
     fn x (&self) -> N { self[0] }
     fn y (&self) -> N { self[1] }
@@ -880,6 +880,31 @@ impl<E: Engine, A: Widget<Engine = E>, B: Widget<Engine = E>> Widget for Split<E
     }
 }
 
+/// A widget that tracks its render width and height
+pub struct Measure<E: Engine>(PhantomData<E>, AtomicUsize, AtomicUsize);
+
+impl<E: Engine> Measure<E> {
+    pub fn w (&self) -> usize { self.1.load(Ordering::Relaxed) }
+    pub fn h (&self) -> usize { self.2.load(Ordering::Relaxed) }
+    pub fn wh (&self) -> [usize;2] { [self.w(), self.h()] }
+    pub fn set_w (&self, w: impl Into<usize>) { self.1.store(w.into(), Ordering::Relaxed) }
+    pub fn set_h (&self, h: impl Into<usize>) { self.2.store(h.into(), Ordering::Relaxed) }
+    pub fn set_wh (&self, w: impl Into<usize>, h: impl Into<usize>) { self.set_w(w); self.set_h(h); }
+    pub fn new () -> Self { Self(PhantomData::default(), 0.into(), 0.into()) }
+}
+
+impl<E: Engine> Widget for Measure<E> {
+    type Engine = E;
+    fn layout (&self, _: E::Size) -> Perhaps<E::Size> {
+        Ok(Some([0u16.into(), 0u16.into()].into()))
+    }
+    fn render (&self, to: &mut E::Output) -> Usually<()> {
+        self.set_w(to.area().w());
+        self.set_h(to.area().h());
+        Ok(())
+    }
+}
+
 /// A scrollable area.
 pub struct Scroll<
     E: Engine,

crates/tek_sequencer/src/arranger.rs

@@ -66,10 +66,8 @@ pub struct Arrangement<E: Engine> {
     pub focused:  bool,
     /// Background color of arrangement
     pub color:    Color,
-    /// Width of arrangement area at last render
+    /// Width and height of arrangement area at last render
-    pub width:    AtomicUsize,
+    pub size:     Measure<E>,
-    /// Height of arrangement area at last render
-    pub height:   AtomicUsize,
 }
 /// Represents a track in the arrangement
 pub struct ArrangementTrack<E: Engine> {
@@ -238,8 +236,7 @@ impl<E: Engine> Arrangement<E> {
             tracks:   vec![],
             focused:  false,
             color:    Color::Rgb(28, 35, 25),
-            width:    0.into(),
+            size:     Measure::new(),
-            height:   0.into(),
         }
     }
     pub fn activate (&mut self) {

crates/tek_sequencer/src/arranger_tui.rs

@@ -146,30 +146,21 @@ impl<'a> Content for VerticalArranger<'a, Tui> {
             let rows: &[(usize, usize)] = rows.as_ref();
             let cols: &[(usize, usize)] = cols.as_ref();
             let any_size = |_|Ok(Some([0,0]));
-
             // store render area
-            add(&CustomWidget::new(any_size, move|to: &mut TuiOutput|{
+            add(&self.0.size)?;
-                let [x, y, w, h] = to.area();
-                self.0.width.store(w as usize, Ordering::Relaxed);
-                self.0.height.store(h as usize, Ordering::Relaxed);
-                Ok(())
-            }))?;
-
             // column separators
             add(&CustomWidget::new(any_size, move|to: &mut TuiOutput|{
                 let area  = to.area();
                 let style = Some(Style::default().fg(COLOR_SEPARATOR));
-                for x in cols.iter().map(|col|col.1) {
+                Ok(for x in cols.iter().map(|col|col.1) {
                     let x = scene_title_w + area.x() + x as u16;
                     for y in area.y()..area.y2() { to.blit(&"▎", x, y, style); }
-                }
+                })
-                Ok(())
             }))?;
-
             // row separators
             add(&CustomWidget::new(any_size, move|to: &mut TuiOutput|{
                 let area = to.area();
-                for y in rows.iter().map(|row|row.1) {
+                Ok(for y in rows.iter().map(|row|row.1) {
                     let y = area.y() + (y / PPQ) as u16 + 1;
                     if y >= to.buffer.area.height { break }
                     for x in area.x()..area.x2().saturating_sub(2) {
@@ -179,10 +170,8 @@ impl<'a> Content for VerticalArranger<'a, Tui> {
                             cell.underline_color = COLOR_SEPARATOR;
                         }
                     }
-                }
+                })
-                Ok(())
             }))?;
-
             // track titles
             let header = row!((track, w) in tracks.iter().zip(cols.iter().map(|col|col.0))=>{
                 let name   = track.name.read().unwrap();
@@ -211,13 +200,11 @@ impl<'a> Content for VerticalArranger<'a, Tui> {
                     .bg(track.color)
                     .push_x(scene_title_w)
             });
-
             // scene titles
             let scene_name = |scene, playing: bool, height|row!(
                 if playing { "▶ " } else { "  " },
                 TuiStyle::bold((scene as &Scene).name.read().unwrap().as_str(), true),
             ).fixed_xy(scene_title_w, height);
-
             // scene clips
             let scene_clip = |scene, track: usize, w: u16, h: u16|Layers::new(move |add|{
                 let mut color = clip_bg;
@@ -233,10 +220,8 @@ impl<'a> Content for VerticalArranger<'a, Tui> {
                 };
                 add(&Background(color))
             }).fixed_xy(w, h);
-
+            // tracks and scenes
-            add(&col!(
+            add(&col!(header, col!(
-                header,
-                col!(
                 // scenes:
                 (scene, pulses) in scenes.iter().zip(rows.iter().map(|row|row.0)) => {
                     let height = 1.max((pulses / PPQ) as u16);
@@ -245,15 +230,12 @@ impl<'a> Content for VerticalArranger<'a, Tui> {
                         // scene title:
                         add(&scene_name(scene, playing, height).bg(scene.color))?;
                         // clip per track:
-                            for (track, w) in cols.iter().map(|col|col.0).enumerate() {
+                        Ok(for (track, w) in cols.iter().map(|col|col.0).enumerate() {
                             add(&scene_clip(scene, track, w as u16, height))?;
-                            }
+                        })
-                            Ok(())
                     }).fixed_y(height)
                 }
-                ),
+            )))?;
-            ))?;
-
             // cursor
             add(&CustomWidget::new(any_size, move|to: &mut TuiOutput|{
                 let area     = to.area();
@@ -317,18 +299,14 @@ impl<'a> Content for VerticalArranger<'a, Tui> {
                     }
                 }
                 Ok(())
-            }))?;
+            }))
-
-            Ok(())
         }).bg(bg).grow_y(1).border(border);
-
         let title_color = if self.0.focused {
             Color::Rgb(150, 160, 90)
         } else {
             Color::Rgb(120, 130, 100)
         };
-        let w = self.0.width.load(Ordering::Relaxed);
+        let [w, h] = self.0.size.wh();
-        let h = self.0.height.load(Ordering::Relaxed);
         let lower_right = TuiStyle::fg(format!("{w}x{h}"), title_color)
             .pull_x(1).align_se().fill_xy();
         lay!(content, lower_right)