wip: modularize once again

midi/src/midi_point.rs

@@ -0,0 +1,50 @@
+use crate::*;
+
+#[derive(Debug, Clone)]
+pub struct MidiPointModel {
+    /// Time coordinate of cursor
+    pub time_point: Arc<AtomicUsize>,
+    /// Note coordinate of cursor
+    pub note_point: Arc<AtomicUsize>,
+    /// Length of note that will be inserted, in pulses
+    pub note_len:   Arc<AtomicUsize>,
+}
+
+impl Default for MidiPointModel {
+    fn default () -> Self {
+        Self {
+            time_point: Arc::new(0.into()),
+            note_point: Arc::new(36.into()),
+            note_len:   Arc::new(24.into()),
+        }
+    }
+}
+
+pub trait NotePoint {
+    fn note_len       (&self) -> usize;
+    fn set_note_len   (&self, x: usize);
+    fn note_point     (&self) -> usize;
+    fn set_note_point (&self, x: usize);
+    fn note_end (&self) -> usize { self.note_point() + self.note_len() }
+}
+
+pub trait TimePoint {
+    fn time_point     (&self) -> usize;
+    fn set_time_point (&self, x: usize);
+}
+
+pub trait MidiPoint: NotePoint + TimePoint {}
+
+impl<T: NotePoint + TimePoint> MidiPoint for T {}
+
+impl NotePoint for MidiPointModel {
+    fn note_len (&self) -> usize { self.note_len.load(Relaxed)}
+    fn set_note_len (&self, x: usize) { self.note_len.store(x, Relaxed) }
+    fn note_point (&self) -> usize { self.note_point.load(Relaxed).min(127) }
+    fn set_note_point (&self, x: usize) { self.note_point.store(x.min(127), Relaxed) }
+}
+
+impl TimePoint for MidiPointModel {
+    fn time_point (&self) -> usize { self.time_point.load(Relaxed) }
+    fn set_time_point (&self, x: usize) { self.time_point.store(x, Relaxed) }
+}