refactor: separate Render from Handle

src/device.rs

@@ -20,6 +20,44 @@ pub use self::launcher::Launcher;
 
 use crossterm::event;
 
+pub trait Handle {
+    // Returns Ok(true) if the device handled the event.
+    // This is the mechanism which allows nesting of components;.
+    fn handle (&mut self, _e: &AppEvent) -> Usually<bool> {
+        Ok(false)
+    }
+}
+
+pub trait Render {
+    // Returns space used by component.
+    // This is insufficient but for the most basic dynamic layout algorithms.
+    fn render (&self, _b: &mut Buffer, _a: Rect) -> Usually<Rect> {
+        Ok(Rect { x: 0, y: 0, width: 0, height: 0 })
+    }
+}
+
+impl Render for Box<dyn Device> {
+    fn render (&self, b: &mut Buffer, a: Rect) -> Usually<Rect> {
+        (**self).render(b, a)
+    }
+}
+
+pub trait Device: Render + Handle + Send + Sync {}
+
+impl<T: Render + Handle + Send + Sync> Device for T {}
+
+impl WidgetRef for &dyn Render {
+    fn render_ref (&self, area: Rect, buf: &mut Buffer) {
+        Render::render(*self, buf, area).expect("Failed to render device.");
+    }
+}
+
+impl WidgetRef for dyn Render {
+    fn render_ref (&self, area: Rect, buf: &mut Buffer) {
+        Render::render(self, buf, area).expect("Failed to render device.");
+    }
+}
+
 pub fn run (device: impl Device + Send + Sync + 'static) -> Result<(), Box<dyn Error>> {
     let device = Arc::new(Mutex::new(device));
     let exited = Arc::new(AtomicBool::new(false));
@@ -89,19 +127,6 @@ pub fn run (device: impl Device + Send + Sync + 'static) -> Result<(), Box<dyn E
     Ok(())
 }
 
-pub trait Device: Send + Sync {
-    // Returns Ok(true) if the device handled the event.
-    // This is the mechanism which allows nesting of components;.
-    fn handle (&mut self, _event: &AppEvent) -> Usually<bool> {
-        Ok(false)
-    }
-    // Returns space used by component.
-    // This is insufficient but for the most basic dynamic layout algorithms.
-    fn render (&self, _buffer: &mut Buffer, _area: Rect) -> Usually<Rect> {
-        Ok(Rect { x: 0, y: 0, width: 0, height: 0 })
-    }
-}
-
 pub struct DynamicDevice<T> {
     pub state:   Arc<Mutex<T>>,
     pub render:  Mutex<Box<dyn FnMut(&T, &mut Buffer, Rect)->Usually<Rect> + Send>>,
@@ -110,10 +135,13 @@ pub struct DynamicDevice<T> {
     client: Option<DynamicAsyncClient>
 }
 
-impl<T: Send + Sync> Device for DynamicDevice<T> {
+impl<T> Handle for DynamicDevice<T> {
     fn handle (&mut self, event: &AppEvent) -> Usually<bool> {
         self.handle.lock().unwrap()(&mut *self.state.lock().unwrap(), event)
     }
+}
+
+impl<T> Render for DynamicDevice<T> {
     fn render (&self, buf: &mut Buffer, area: Rect) -> Usually<Rect> {
         self.render.lock().unwrap()(&*self.state.lock().unwrap(), buf, area)
     }
@@ -162,18 +190,6 @@ impl<T: Send + Sync + 'static> DynamicDevice<T> {
     }
 }
 
-impl WidgetRef for &dyn Device {
-    fn render_ref (&self, area: Rect, buf: &mut Buffer) {
-        Device::render(*self, buf, area).expect("Failed to render device.");
-    }
-}
-
-impl WidgetRef for dyn Device {
-    fn render_ref (&self, area: Rect, buf: &mut Buffer) {
-        Device::render(self, buf, area).expect("Failed to render device.");
-    }
-}
-
 #[derive(Debug)]
 pub enum AppEvent {
     /// Terminal input

src/device/chain.rs

@@ -35,29 +35,25 @@ pub fn render (state: &Chain, buf: &mut Buffer, area: Rect)
     -> Usually<Rect>
 {
     let Rect { x, y, .. } = area;
+    let selected = Some(if state.focused {
+        Style::default().green().not_dim()
+    } else {
+        Style::default().green().dim()
+    });
     Ok(match state.view {
         ChainView::Hidden => Rect { x, y, width: 0, height: 0 },
         ChainView::Compact => {
             let area = Rect { x, y, width: (state.name.len() + 4) as u16, height: 3 };
             buf.set_string(area.x + 2, area.y + 1, &state.name, Style::default());
-            draw_box_styled(buf, area, Some(Style::default().dim()))
+            draw_box_styled(buf, area, selected)
         },
         ChainView::Row => {
-            let (area, areas) = draw_row(&state.items, buf, area, 0)?;
+            let (area, areas) = Row::draw(buf, area, &state.items, 0)?;
-            draw_box_styled(buf, area, Some(Style::default().dim()))
+            draw_box_styled(buf, area, selected)
         },
         ChainView::Column => {
-            let (area, areas) = draw_column(&state.items, buf, area, 0)?;
+            let (area, areas) = Column::draw(buf, area, &state.items, 0)?;
-            //draw_box_styled(buf, area, Some(if state.focused {
+            draw_box_styled(buf, areas[state.focus], selected);
-                //Style::default().dim()
-            //} else {
-                //Style::default().not_dim()
-            //}));
-            draw_box_styled(buf, areas[state.focus], Some(if state.focused {
-                Style::default().green().not_dim()
-            } else {
-                Style::default().green().dim()
-            }));
             area
         },
     })

src/device/sequencer.rs

@@ -106,6 +106,22 @@ impl Sequencer {
     }
 }
 
+impl Ports for Sequencer {
+    fn audio_ins (&self) -> Usually<Vec<String>> {
+        Ok(vec![])
+    }
+    fn audio_outs (&self) -> Usually<Vec<String>> {
+        Ok(vec![])
+    }
+    fn midi_ins (&self) -> Usually<Vec<String>> {
+        Ok(vec![self.input_port.short_name()?])
+    }
+    fn midi_outs (&self) -> Usually<Vec<String>> {
+        Ok(vec![self.output_port.short_name()?])
+    }
+    fn connect (&mut self, connect: bool, source: &str, target: &str) {}
+}
+
 fn process_in (s: &mut Sequencer, scope: &ProcessScope, transport: &::jack::TransportStatePosition) {
     if !s.recording {
         return
@@ -227,11 +243,11 @@ fn draw_header (s: &Sequencer, buf: &mut Buffer, area: Rect, beat: usize) -> Usu
     let style = Style::default().gray();
     let timer = format!("{rep}.{step:02} / {reps}.{steps}");
     buf.set_string(x + width - 2 - timer.len() as u16, y + 1, &timer, style.bold().not_dim());
-    buf.set_string(x + 2, y + 1, &format!("⏹ STOP"), if s.playing {
+    if s.playing {
-        style.dim().bold()
+        buf.set_string(x + 2, y + 1, &format!("▶ PLAYING"), style.not_dim().white().bold());
     } else {
-        style.not_dim().white().bold()
+        buf.set_string(x + 2, y + 1, &format!("⏹ STOPPED"), style.dim().bold());
-    });
+    }
     buf.set_string(x, y + 2, format!("├{}┤", "-".repeat((area.width - 2).into())), style.dim());
     //buf.set_string(x + 2, y + 2,
         //&format!("▶ PLAY"), if s.playing {
@@ -239,19 +255,19 @@ fn draw_header (s: &Sequencer, buf: &mut Buffer, area: Rect, beat: usize) -> Usu
         //} else {
             //Style::default().dim()
         //});
-    buf.set_string(x + 10, y + 1,
+    buf.set_string(x + 13, y + 1,
         &format!("⏺ REC"), if s.recording {
             Style::default().bold().red()
         } else {
             Style::default().bold().dim()
         });
-    buf.set_string(x + 17, y + 1,
+    buf.set_string(x + 20, y + 1,
         &format!("⏺ DUB"), if s.overdub {
             Style::default().bold().yellow()
         } else {
             Style::default().bold().dim()
         });
-    buf.set_string(x + 24, y + 1,
+    buf.set_string(x + 27, y + 1,
         &format!("⏺ MON"), if s.monitoring {
             Style::default().bold().green()
         } else {

src/device/sequencer/horizontal.rs

@@ -7,17 +7,26 @@ pub fn draw_horizontal (
     mut area: Rect,
     beat: usize
 ) -> Usually<Rect> {
-    let ppq = s.timebase.ppq() as u32;
     area.x = area.x + 13;
-
-    draw_keys_horizontal(s, buf, area)?;
-
     let Rect { x, y, width, .. } = area;
-    let (time0, time1) = s.time_axis;
+    keys(s, buf, area)?;
-    let (note0, note1) = s.note_axis;
+    timer(s, buf, x, y, beat);
+    let height = 32.max(s.note_axis.1 - s.note_axis.0) / 2;
+    lanes(s, buf, x, y, width);
+    cursor(s, buf, x, y);
+    footer(s, buf, x, y, width, height);
+    Ok(Rect {
+        x:      x - 13,
+        y:      y,
+        width:  s.time_axis.1 - s.time_axis.0 + 19,
+        height: height + 3
+    })
+}
+
+fn timer (s: &Sequencer, buf: &mut Buffer, x: u16, y: u16, beat: usize) {
     let bw = Style::default().dim();
     let bg = Style::default().on_black();
-
+    let (time0, time1) = s.time_axis;
     for step in time0..time1 {
         buf.set_string(x + 6 + step, y - 1, &"-", if beat % s.steps == step as usize {
             Style::default().yellow().bold().not_dim()
@@ -25,6 +34,13 @@ pub fn draw_horizontal (
             Style::default()
         });
     }
+}
+
+fn lanes (s: &Sequencer, buf: &mut Buffer, x: u16, y: u16, width: u16) {
+    let bw = Style::default().dim();
+    let bg = Style::default().on_black();
+    let ppq = s.timebase.ppq() as u32;
+    let (time0, time1) = s.time_axis;
     for step in time0..time1 {
         let time_start = step as u32 * ppq;
         let time_end   = (step + 1) as u32 * ppq;
@@ -33,12 +49,16 @@ pub fn draw_horizontal (
         }
         for (_, (_, events)) in s.sequences[s.sequence].range(time_start..time_end).enumerate() {
             if events.len() > 0 {
-                buf.set_string(x + 5 + step as u16, y, "█", bw);
+                buf.set_string(x + 6 + step as u16, y, "█", bw);
             }
         }
     }
+}
 
-    let height = 32.max(note1 - note0) / 2;
+fn footer (s: &Sequencer, buf: &mut Buffer, x: u16, y: u16, width: u16, height: u16) {
+    let bw = Style::default().dim();
+    let bg = Style::default().on_black();
+    let (note0, note1) = s.note_axis;
     buf.set_string(x - 13, y + height, format!("├{}┤", "-".repeat((width - 2).into())),
         Style::default().dim());
     {
@@ -65,26 +85,25 @@ pub fn draw_horizontal (
             x = x + 2;
         }
     }
+}
+
+fn cursor (s: &Sequencer, buf: &mut Buffer, x: u16, y: u16) {
+    let bw = Style::default().dim();
+    let bg = Style::default().on_black();
     buf.set_string(
         x + 6 + s.time_cursor,
         y + s.note_cursor / 2,
         if s.note_cursor % 2 == 0 { "▀" } else { "▄" },
         Style::default()
     );
-    Ok(Rect {
-        x: x - 13,
-        y,
-        width: time1 - time0 + 19,
-        height: height + 3
-    })
 }
 
-pub fn draw_keys_horizontal (s: &Sequencer, buf: &mut Buffer, mut area: Rect) -> Usually<Rect> {
+fn keys (s: &Sequencer, buf: &mut Buffer, mut area: Rect) -> Usually<Rect> {
+    let bw = Style::default().dim();
+    let bg = Style::default().on_black();
     let Rect { x, y, .. } = area;
     let (note0, note1) = s.note_axis;
     let (time0, time1) = s.time_axis;
-    let bw = Style::default().dim();
-    let bg = Style::default().on_black();
     for i in 0..32.max(note1-note0)/2 {
         let y = y + i;
         buf.set_string(x + 2, y, KEYS_VERTICAL[(i % 6) as usize], bw);

src/device/sequencer/vertical.rs

@@ -7,17 +7,23 @@ pub fn draw_vertical (
     mut area: Rect,
     beat: usize
 ) -> Usually<Rect> {
-    let ppq = s.timebase.ppq() as u32;
     area.x = area.x + 13;
+    let Rect { x, y, .. } = area;
+    keys(s, buf, area, beat);
+    steps(s, buf, area, beat);
+    let height = (s.time_axis.1-s.time_axis.0)/2;
+    footer(s, buf, x, y, height);
+    playhead(s, buf, x, y);
+    Ok(Rect { x, y, width: area.width, height: height + 1 })
+}
 
-    draw_keys_vertical(s, buf, area, beat);
+fn steps (s: &Sequencer, buf: &mut Buffer, area: Rect, beat: usize) {
-
+    let ppq = s.timebase.ppq() as u32;
+    let bw = Style::default().dim().on_black();
+    let bg = Style::default().on_black();
     let Rect { x, y, .. } = area;
     let (time0, time1) = s.time_axis;
     let (note0, note1) = s.note_axis;
-    let bw = Style::default().dim().on_black();
-    let bg = Style::default().on_black();
-
     for step in time0..time1 {
         let y = y - time0 + step / 2;
         let step = step as usize;
@@ -56,8 +62,9 @@ pub fn draw_vertical (
             }
         }
     }
+}
 
-    let height = (time1-time0)/2;
+fn footer (s: &Sequencer, buf: &mut Buffer, x: u16, y: u16, height: u16) {
     buf.set_string(x + 2, y + height + 1, format!(
         "Q 1/{} | N {} ({}-{}) | T {} ({}-{})",
         4 * s.resolution,
@@ -68,16 +75,18 @@ pub fn draw_vertical (
         s.time_axis.0 + 1,
         s.time_axis.1,
     ), Style::default().dim());
+}
+
+fn playhead (s: &Sequencer, buf: &mut Buffer, x: u16, y: u16) {
     buf.set_string(
         x + 5 + s.note_cursor,
         y + s.time_cursor / 2,
         if s.time_cursor % 2 == 0 { "▀" } else { "▄" },
         Style::default()
     );
-    Ok(Rect { x, y, width: area.width, height: height + 1 })
 }
 
-fn draw_keys_vertical (s: &Sequencer, buf: &mut Buffer, mut area: Rect, beat: usize) {
+fn keys (s: &Sequencer, buf: &mut Buffer, mut area: Rect, beat: usize) {
     let ppq = s.timebase.ppq() as u32;
     let Rect { x, y, .. } = area;
     let (note0, note1) = s.note_axis;

src/device/transport.rs

@@ -15,15 +15,9 @@ impl Transport {
         DynamicDevice::new(render, handle, process, Self {
             name: name.into(),
             timebase: Arc::new(Timebase {
-                rate:  AtomicUsize::new(
+                rate:  AtomicUsize::new(client.sample_rate()),
-                    transport.query()?.pos.frame_rate().map(|x|x as usize).unwrap_or(0)
+                tempo: AtomicUsize::new(113000),
-                ),
+                ppq:   AtomicUsize::new(96),
-                tempo: AtomicUsize::new(
-                    113000
-                ),
-                ppq:   AtomicUsize::new(
-                    96
-                ),
             }),
             transport
         }).activate(client)

src/layout/container.rs

@@ -1,111 +1,62 @@
 use crate::prelude::*;
-
+use super::*;
-pub fn draw_box (buffer: &mut Buffer, area: Rect) -> Rect {
-    if area.width < 1 || area.height < 1 {
-        return area
-    }
-    let border = Style::default().gray().dim();
-    let top    = format!("╭{}╮", "─".repeat((area.width - 2).into()));
-    let bottom = format!("╰{}╯", "─".repeat((area.width - 2).into()));
-    buffer.set_string(area.x, area.y, top, border);
-    for y in (area.y + 1)..(area.y + area.height - 1) {
-        buffer.set_string(area.x, y, format!("│"), border);
-        buffer.set_string(area.x + area.width - 1, y, format!("│"), border);
-    }
-    buffer.set_string(area.x, area.y + area.height - 1, bottom, border);
-    area
-}
-
-pub fn draw_box_styled (buffer: &mut Buffer, area: Rect, style: Option<Style>) -> Rect {
-    if area.width < 1 || area.height < 1 {
-        return area
-    }
-    let style = style.unwrap_or(Style::default());
-    let top    = format!("╭{}╮", "─".repeat((area.width - 2).into()));
-    let bottom = format!("╰{}╯", "─".repeat((area.width - 2).into()));
-    buffer.set_string(area.x, area.y, top, style);
-    for y in (area.y + 1)..(area.y + area.height - 1) {
-        buffer.set_string(area.x, y, format!("│"), style);
-        buffer.set_string(area.x + area.width - 1, y, format!("│"), style);
-    }
-    buffer.set_string(area.x, area.y + area.height - 1, bottom, style);
-    area
-}
-
-pub fn draw_box_styled_dotted (buffer: &mut Buffer, area: Rect, style: Option<Style>) -> Rect {
-    if area.width < 1 || area.height < 1 {
-        return area
-    }
-    let style = style.unwrap_or(Style::default());
-    let top    = format!("╭{}╮", "┅".repeat((area.width - 2).into()));
-    let bottom = format!("╰{}╯", "┅".repeat((area.width - 2).into()));
-    buffer.set_string(area.x, area.y, top, style);
-    for y in (area.y + 1)..(area.y + area.height - 1) {
-        buffer.set_string(area.x, y, format!("┇"), style);
-        buffer.set_string(area.x + area.width - 1, y, format!("┇"), style);
-    }
-    buffer.set_string(area.x, area.y + area.height - 1, bottom, style);
-    area
-}
 
 pub struct Column(pub Vec<Box<dyn Device>>);
 
+pub struct Row(pub Vec<Box<dyn Device>>);
+
 impl Column {
     pub fn new (items: Vec<Box<dyn Device>>) -> Self {
         Self(items)
     }
+    pub fn draw (buf: &mut Buffer, area: Rect, items: &[impl Render], gap: i16)
+        -> Usually<(Rect, Vec<Rect>)>
+    {
+        let mut w = 0u16;
+        let mut h = 0u16;
+        let mut rects = vec![];
+        for (i, device) in items.iter().enumerate() {
+            let y      = area.y + h;
+            let rect   = Rect { x: area.x, y, width: area.width, height: area.height - h };
+            let result = device.render(buf, rect)?;
+            rects.push(result);
+            w = w.max(result.width);
+            h = ((h + result.height) as i16 + gap).max(0) as u16;
+        }
+        Ok((Rect { x: area.x, y: area.y, width: w, height: h }, rects))
+    }
 }
 
-pub struct Row(pub Vec<Box<dyn Device>>);
+impl Render for Column {
+    fn render (&self, buf: &mut Buffer, area: Rect) -> Usually<Rect> {
+        Ok(Column::draw(buf, area, &self.0, 0)?.0)
+    }
+}
 
 impl Row {
     pub fn new (items: Vec<Box<dyn Device>>) -> Self {
         Self(items)
     }
+    pub fn draw (buf: &mut Buffer, area: Rect, items: &[impl Render], gap: i16)
+        -> Usually<(Rect, Vec<Rect>)>
+    {
+        let mut w = 0u16;
+        let mut h = 0u16;
+        let mut rects = vec![];
+        for (i, device) in items.iter().enumerate() {
+            let x      = area.x + w;
+            let rect   = Rect { x, y: area.y, width: area.width - w, height: area.height };
+            let result = device.render(buf, rect)?;
+            rects.push(result);
+            w = ((w + result.width) as i16 + gap).max(0) as u16;
+            h = h.max(result.height);
+        }
+        Ok((Rect { x: area.x, y: area.y, width: w, height: h }, rects))
+    }
 }
 
-impl Device for Column {
+impl Render for Row {
     fn render (&self, buf: &mut Buffer, area: Rect) -> Usually<Rect> {
-        Ok(draw_column(&self.0, buf, area, 0)?.0)
+        Ok(Row::draw(buf, area, &self.0, 0)?.0)
     }
 }
-
-impl Device for Row {
-    fn render (&self, buf: &mut Buffer, area: Rect) -> Usually<Rect> {
-        Ok(draw_row(&self.0, buf, area, 0)?.0)
-    }
-}
-
-pub fn draw_column (items: &[Box<dyn Device>], buf: &mut Buffer, area: Rect, space: i16)
-    -> Usually<(Rect, Vec<Rect>)>
-{
-    let mut w = 0u16;
-    let mut h = 0u16;
-    let mut rects = vec![];
-    for (i, device) in items.iter().enumerate() {
-        let y      = ((area.y + h) as i16).saturating_add(space) as u16;
-        let rect   = Rect { x: area.x, y, width: area.width, height: area.height - h };
-        let result = device.render(buf, rect)?;
-        rects.push(result);
-        w = w.max(result.width);
-        h = h + result.height;
-    }
-    Ok((Rect { x: area.x, y: area.y, width: w, height: h }, rects))
-}
-
-pub fn draw_row (items: &[Box<dyn Device>], buf: &mut Buffer, area: Rect, space: i16)
-    -> Usually<(Rect, Vec<Rect>)>
-{
-    let mut w = 0u16;
-    let mut h = 0u16;
-    let mut rects = vec![];
-    for (i, device) in items.iter().enumerate() {
-        let x      = ((area.x + w) as i16).saturating_add(space) as u16;
-        let rect   = Rect { x, y: area.y, width: area.width - w, height: area.height };
-        let result = device.render(buf, rect)?;
-        rects.push(result);
-        w = w + result.width;
-        h = h.max(result.height);
-    }
-    Ok((Rect { x: area.x, y: area.y, width: w, height: h }, rects))
-}

src/layout/focus.rs

@@ -26,12 +26,15 @@ pub fn handle_focus <T: Focus> (
 
 pub struct FocusColumn(pub Option<usize>, pub Column);
 
-impl Device for FocusColumn {
+impl Handle for FocusColumn {
     fn handle (&mut self, event: &AppEvent) -> Usually<bool> {
         handle_focus(self, event, KEYMAP_FOCUS_COLUMN)
     }
+}
+
+impl Render for FocusColumn {
     fn render (&self, buf: &mut Buffer, area: Rect) -> Usually<Rect> {
-        let (rect, rects) = draw_column(self.1.0.as_ref(), buf, area, 0)?;
+        let (rect, rects) = Column::draw(buf, area, self.1.0.as_ref(), 0)?;
         //if i == self.focus {
             //if self.focused {
                 //draw_box_styled(buf, result, Some(Style::default().white().not_dim()))
@@ -108,12 +111,15 @@ impl Focus for FocusColumn {
 
 pub struct FocusRow(pub Option<usize>, pub Row);
 
-impl Device for FocusRow {
+impl Handle for FocusRow {
     fn handle (&mut self, event: &AppEvent) -> Usually<bool> {
         handle_focus(self, event, KEYMAP_FOCUS_ROW)
     }
+}
+
+impl Render for FocusRow {
     fn render (&self, buf: &mut Buffer, area: Rect) -> Usually<Rect> {
-        let (rect, rects) = draw_row(&self.1.0, buf, area, 0)?;
+        let (rect, rects) = Row::draw(buf, area, &self.1.0, 0)?;
         Ok(rect)
     }
 }

src/layout/mod.rs

@@ -4,3 +4,53 @@ mod container;
 pub use container::*;
 mod scroll;
 pub use scroll::*;
+
+use crate::prelude::*;
+
+pub fn draw_box (buffer: &mut Buffer, area: Rect) -> Rect {
+    if area.width < 1 || area.height < 1 {
+        return area
+    }
+    let border = Style::default().gray().dim();
+    let top    = format!("╭{}╮", "─".repeat((area.width - 2).into()));
+    let bottom = format!("╰{}╯", "─".repeat((area.width - 2).into()));
+    buffer.set_string(area.x, area.y, top, border);
+    for y in (area.y + 1)..(area.y + area.height - 1) {
+        buffer.set_string(area.x, y, format!("│"), border);
+        buffer.set_string(area.x + area.width - 1, y, format!("│"), border);
+    }
+    buffer.set_string(area.x, area.y + area.height - 1, bottom, border);
+    area
+}
+
+pub fn draw_box_styled (buffer: &mut Buffer, area: Rect, style: Option<Style>) -> Rect {
+    if area.width < 1 || area.height < 1 {
+        return area
+    }
+    let style = style.unwrap_or(Style::default());
+    let top    = format!("╭{}╮", "─".repeat((area.width - 2).into()));
+    let bottom = format!("╰{}╯", "─".repeat((area.width - 2).into()));
+    buffer.set_string(area.x, area.y, top, style);
+    for y in (area.y + 1)..(area.y + area.height - 1) {
+        buffer.set_string(area.x, y, format!("│"), style);
+        buffer.set_string(area.x + area.width - 1, y, format!("│"), style);
+    }
+    buffer.set_string(area.x, area.y + area.height - 1, bottom, style);
+    area
+}
+
+pub fn draw_box_styled_dotted (buffer: &mut Buffer, area: Rect, style: Option<Style>) -> Rect {
+    if area.width < 1 || area.height < 1 {
+        return area
+    }
+    let style = style.unwrap_or(Style::default());
+    let top    = format!("╭{}╮", "┅".repeat((area.width - 2).into()));
+    let bottom = format!("╰{}╯", "┅".repeat((area.width - 2).into()));
+    buffer.set_string(area.x, area.y, top, style);
+    for y in (area.y + 1)..(area.y + area.height - 1) {
+        buffer.set_string(area.x, y, format!("┇"), style);
+        buffer.set_string(area.x + area.width - 1, y, format!("┇"), style);
+    }
+    buffer.set_string(area.x, area.y + area.height - 1, bottom, style);
+    area
+}

src/main.rs

@@ -12,6 +12,7 @@ pub mod draw;
 pub mod config;
 pub mod layout;
 pub mod time;
+pub mod port;
 
 use crate::device::*;
 use crate::layout::*;

src/port.rs

@@ -0,0 +1,14 @@
+use crate::prelude::*;
+
+pub trait Ports {
+    fn audio_ins  (&self) -> Usually<Vec<String>>;
+    fn audio_outs (&self) -> Usually<Vec<String>>;
+    fn midi_ins   (&self) -> Usually<Vec<String>>;
+    fn midi_outs  (&self) -> Usually<Vec<String>>;
+    fn connect (&mut self, connect: bool, source: &str, target: &str);
+    fn connect_all (&mut self, connections: &[(bool, &str, &str)]) {
+        for (connect, source, target) in connections.iter() {
+            self.connect(*connect, source, target)
+        }
+    }
+}

src/prelude.rs

@@ -1,44 +1,15 @@
 pub type Usually<T> = Result<T, Box<dyn Error>>;
 
 pub use crate::draw::*;
-
+pub use crate::device::*;
-pub use crate::device::{
-    Device,
-    DynamicDevice,
-    AppEvent,
-};
-
 pub use crate::time::*;
-
+pub use crate::port::*;
-pub use crate::layout::{
+pub use crate::layout::*;
-    Row,
-    Column,
-    FocusRow,
-    FocusColumn,
-    Focus,
-    FocusEvent,
-    handle_focus,
-    draw_box,
-    draw_box_styled,
-    draw_row,
-    draw_column,
-};
 
 pub use std::error::Error;
-
+pub use std::io::{stdout, Stdout, Write};
-pub use std::io::{
+pub use std::thread::{spawn, JoinHandle};
-    stdout,
-    Stdout,
-    Write
-};
-
-pub use std::thread::{
-    spawn,
-    JoinHandle
-};
-
 pub use std::time::Duration;
-
 pub use std::sync::{
     Arc,
     Mutex,