wip: refactor pt.6, fixed tek_api

crates/tek_tui/src/tui_sequencer_foc.rs

@@ -0,0 +1,43 @@
+use crate::*;
+
+/// Sections in the sequencer app that may be focused
+#[derive(Copy, Clone, PartialEq, Eq)] pub enum SequencerFocus {
+    /// The transport (toolbar) is focused
+    Transport,
+    /// The phrase list (pool) is focused
+    PhrasePool,
+    /// The phrase editor (sequencer) is focused
+    PhraseEditor,
+}
+
+/// Focus layout of sequencer app
+impl<E: Engine> FocusGrid for Sequencer<E> {
+    type Item = SequencerFocus;
+    fn cursor (&self) -> (usize, usize) {
+        self.focus_cursor
+    }
+    fn cursor_mut (&mut self) -> &mut (usize, usize) {
+        &mut self.focus_cursor
+    }
+    fn layout (&self) -> &[&[SequencerFocus]] { &[
+        &[SequencerFocus::Transport],
+        &[SequencerFocus::PhrasePool, SequencerFocus::PhraseEditor],
+    ] }
+    fn focus_enter (&mut self) {
+        self.entered = true
+    }
+    fn focus_exit (&mut self) {
+        self.entered = false
+    }
+    fn entered (&self) -> Option<Self::Item> {
+        if self.entered { Some(self.focused()) } else { None }
+    }
+    fn update_focus (&mut self) {
+        let focused = self.focused();
+        if let Some(transport) = self.transport.as_ref() {
+            transport.write().unwrap().focused = focused == SequencerFocus::Transport
+        }
+        self.phrases.write().unwrap().focused = focused == SequencerFocus::PhrasePool;
+        self.editor.focused = focused == SequencerFocus::PhraseEditor;
+    }
+}