wip: directional focus!

crates/tek_core/src/focus.rs

@@ -1,5 +1,70 @@
 use crate::*;
 
+pub trait FocusGrid<T> {
+    fn layout (&self) -> &[&[T]];
+    fn cursor (&self) -> (usize, usize);
+    fn cursor_mut (&mut self) -> &mut (usize, usize);
+    fn focused (&self) -> &T {
+        let (x, y) = self.cursor();
+        &self.layout()[y][x]
+    }
+    fn focus_up (&mut self) {
+        let layout = self.layout();
+        let (x, y) = self.cursor();
+        let next_y = if y == 0 { layout.len() - 1 } else { y - 1 };
+        let next_x = if layout[y].len() == layout[next_y].len() { x } else {
+            ((x as f32 / layout[y].len() as f32) * layout[next_y].len() as f32) as usize
+        };
+        *self.cursor_mut() = (next_x, next_y);
+    }
+    fn focus_down (&mut self) {
+        let layout = self.layout();
+        let (x, y) = self.cursor();
+        let next_y = if y >= layout.len() - 1 { 0 } else { y + 1 };
+        let next_x = if layout[y].len() == layout[next_y].len() { x } else {
+            ((x as f32 / layout[y].len() as f32) * layout[next_y].len() as f32) as usize
+        };
+        *self.cursor_mut() = (next_x, next_y);
+    }
+    fn focus_left (&mut self) {
+        let layout = self.layout();
+        let (x, y) = self.cursor();
+        let next_x = if x == 0 { layout[y].len() - 1 } else { x - 1 };
+        *self.cursor_mut() = (next_x, y);
+    }
+    fn focus_right (&mut self) {
+        let layout = self.layout();
+        let (x, y) = self.cursor();
+        let next_x = if x >= layout[y].len() - 1 { 0 } else { x - 1 };
+        *self.cursor_mut() = (next_x, y);
+    }
+    fn focus_next (&mut self) {
+        todo!();
+    }
+    fn focus_prev (&mut self) {
+        todo!();
+    }
+}
+
+//pub struct FocusFrame<'a, E: Engine>(usize, Vec<FocusCell<'a, E>>);
+
+//pub struct FocusCell<'a, E: Engine> {
+    //item:  &'a dyn Handle<E>,
+    //next:  Option<&'a FocusCell<'a, E>>,
+    //prev:  Option<&'a FocusCell<'a, E>>,
+    //up:    Option<&'a FocusCell<'a, E>>,
+    //down:  Option<&'a FocusCell<'a, E>>,
+    //left:  Option<&'a FocusCell<'a, E>>,
+    //right: Option<&'a FocusCell<'a, E>>,
+//}
+
+pub trait FocusContainer<E: Engine> {
+    fn focused (&mut self) -> &mut dyn Handle<E>;
+    fn handle_focus (&mut self, _: &E::Input) -> Perhaps<bool> {
+        Ok(None)
+    }
+}
+
 /// A component that may contain [Focusable] components.
 pub trait Focus <const N: usize, E: Engine>: Widget<Engine = E> + Handle<E> {
     fn focus (&self) -> usize;

crates/tek_core/src/tui.rs

@@ -219,6 +219,14 @@ pub type KeyMap<T> = [KeyBinding<T>];
             kind:      crossterm::event::KeyEventKind::Press,
             state:     crossterm::event::KeyEventState::NONE
         }))
+    };
+    (Shift-$code:pat) => {
+        TuiEvent::Input(crossterm::event::Event::Key(crossterm::event::KeyEvent {
+            code:      $code,
+            modifiers: crossterm::event::KeyModifiers::SHIFT,
+            kind:      crossterm::event::KeyEventKind::Press,
+            state:     crossterm::event::KeyEventState::NONE
+        }))
     }
 }
 pub struct TuiOutput {

crates/tek_sequencer/src/arranger.rs

@@ -2,6 +2,8 @@ use crate::*;
 
 /// Root level object for standalone `tek_arranger`
 pub struct Arranger<E: Engine> {
+    /// Index of currently focused component
+    pub focus:          ArrangerFocus,
     /// Controls the JACK transport.
     pub transport:      Option<Arc<RwLock<TransportToolbar<E>>>>,
     /// Contains all the sequencers.
@@ -12,10 +14,25 @@ pub struct Arranger<E: Engine> {
     pub editor:         PhraseEditor<E>,
     /// This allows the sequencer view to be moved or hidden.
     pub show_sequencer: Option<tek_core::Direction>,
-    /// Index of currently focused component
-    pub focus:          usize,
     /// Slot for modal dialog displayed on top of app.
     pub modal:          Option<Box<dyn ContentComponent<E>>>,
+    /// Focus cursor
+    pub focus_cursor:   (usize, usize)
+}
+/// Sections in the arranger that may be focused
+#[derive(Copy, Clone, PartialEq, Eq)]
+pub enum ArrangerFocus { Transport, Arrangement, PhrasePool, PhraseEditor }
+/// Focus layout of arranger.
+impl<E: Engine> FocusGrid<ArrangerFocus> for Arranger<E> {
+    fn cursor (&self) -> (usize, usize) { self.focus_cursor }
+    fn cursor_mut (&mut self) -> &mut (usize, usize) { &mut self.focus_cursor }
+    fn layout (&self) -> &[&[ArrangerFocus]] {
+        &[
+            &[ArrangerFocus::Transport],
+            &[ArrangerFocus::Arrangement],
+            &[ArrangerFocus::PhrasePool, ArrangerFocus::PhraseEditor],
+        ]
+    }
 }
 /// Represents the tracks and scenes of the composition.
 pub struct Arrangement<E: Engine> {

crates/tek_sequencer/src/arranger_cli.rs

@@ -58,9 +58,10 @@ impl ArrangerCli {
             )?
         );
         Tui::run(Arc::new(RwLock::new(Arranger {
+            focus_cursor:   (0, 1),
             transport:      self.transport.then_some(transport),
             show_sequencer: Some(tek_core::Direction::Down),
-            focus:          0,
+            focus:          ArrangerFocus::Arrangement,
             modal:          None,
             editor:         PhraseEditor::new(),
             arrangement,

crates/tek_sequencer/src/arranger_tui.rs

@@ -25,66 +25,34 @@ impl Content for Arranger<Tui> {
         })
     }
 }
-/// Focusable items in standalone arranger.
-impl Focus<3, Tui> for Arranger<Tui> {
-    fn focus (&self) -> usize {
-        self.focus
-    }
-    fn focus_mut (&mut self) -> &mut usize {
-        &mut self.focus
-    }
-    fn focusable (&self) -> [&dyn Focusable<Tui>;3] {
-        focusables!(self.transport, self.arrangement, self.editor)
-    }
-    fn focusable_mut (&mut self) -> [&mut dyn Focusable<Tui>;3] {
-        focusables_mut!(self.transport, self.arrangement, self.editor)
-    }
-}
 /// Handle top-level events in standalone arranger.
 impl Handle<Tui> for Arranger<Tui> {
     fn handle (&mut self, from: &TuiInput) -> Perhaps<bool> {
-        if let Some(modal) = self.modal.as_mut() {
-            let result = modal.handle(from)?;
-            if from.is_done() {
-                self.modal = None;
+        if !match self.focused() {
+            ArrangerFocus::Transport    => self.transport.handle(from)?,
+            ArrangerFocus::Arrangement  => self.arrangement.handle(from)?,
+            ArrangerFocus::PhrasePool   => self.phrases.handle(from)?,
+            ArrangerFocus::PhraseEditor => self.editor.handle(from)?
+        }.unwrap_or(false) {
+            match from.event() {
+                // Tab navigation
+                key!(KeyCode::Tab)           => { self.focus_next();  },
+                key!(Shift-KeyCode::Tab)     => { self.focus_prev();  },
+                key!(KeyCode::BackTab)       => { self.focus_prev();  },
+                key!(Shift-KeyCode::BackTab) => { self.focus_prev();  },
+                // Directional navigation
+                key!(KeyCode::Up)            => { self.focus_up();    },
+                key!(KeyCode::Down)          => { self.focus_down();  },
+                key!(KeyCode::Left)          => { self.focus_left();  },
+                key!(KeyCode::Right)         => { self.focus_right(); },
+                // Global play/pause binding
+                key!(KeyCode::Char(' ')) => match self.transport {
+                    Some(ref mut transport) => { transport.write().unwrap().toggle_play()?; },
+                    None => { return Ok(None) }
+                },
+                _ => {}
             }
-            return Ok(result)
-        }
-        let focus        = self.focus;
-        let is_first_row = self.arrangement.is_first_row();
-        let is_last_row  = self.arrangement.is_last_row();
-        match from.event() {
-            key!(KeyCode::Char(' ')) => {
-                if let Some(ref mut transport) = self.transport {
-                    transport.write().unwrap().toggle_play()?;
-                } else {
-                    return Ok(None)
-                }
-            },
-            key!(KeyCode::Tab) => {
-                self.focus_next();
-            },
-            key!(KeyCode::BackTab) => {
-                self.focus_prev();
-            },
-            key!(KeyCode::Down) => {
-                if focus == 0 {
-                    self.focus_next();
-                } else if focus == 1 && is_last_row {
-                    self.focus_next();
-                } else {
-                    return self.focused_mut().handle(from)
-                }
-            },
-            key!(KeyCode::Up) => {
-                if focus == 1 && is_first_row {
-                    self.focus_prev();
-                } else {
-                    return self.focused_mut().handle(from)
-                }
-            },
-            _ => return self.focused_mut().handle(from)
-        }
+        };
         Ok(Some(true))
     }
 }