wip: modularize once again

midi/src/midi_view.rs

@@ -0,0 +1,66 @@
+use crate::*;
+
+pub trait MidiViewer: HasSize<TuiOut> + MidiRange + MidiPoint + Debug + Send + Sync {
+    fn buffer_size (&self, phrase: &MidiClip) -> (usize, usize);
+    fn redraw (&self);
+    fn phrase (&self) -> &Option<Arc<RwLock<MidiClip>>>;
+    fn phrase_mut (&mut self) -> &mut Option<Arc<RwLock<MidiClip>>>;
+    fn set_phrase (&mut self, phrase: Option<&Arc<RwLock<MidiClip>>>) {
+        *self.phrase_mut() = phrase.cloned();
+        self.redraw();
+    }
+    /// Make sure cursor is within note range
+    fn autoscroll (&self) {
+        let note_point = self.note_point().min(127);
+        let note_lo    = self.note_lo().get();
+        let note_hi    = self.note_hi();
+        if note_point < note_lo {
+            self.note_lo().set(note_point);
+        } else if note_point > note_hi {
+            self.note_lo().set((note_lo + note_point).saturating_sub(note_hi));
+        }
+    }
+    /// Make sure time range is within display
+    fn autozoom (&self) {
+        if self.time_lock().get() {
+            let time_len  = self.time_len().get();
+            let time_axis = self.time_axis().get();
+            let time_zoom = self.time_zoom().get();
+            loop {
+                let time_zoom = self.time_zoom().get();
+                let time_area = time_axis * time_zoom;
+                if time_area > time_len {
+                    let next_time_zoom = Note::prev(time_zoom);
+                    if next_time_zoom <= 1 {
+                        break
+                    }
+                    let next_time_area = time_axis * next_time_zoom;
+                    if next_time_area >= time_len {
+                        self.time_zoom().set(next_time_zoom);
+                    } else {
+                        break
+                    }
+                } else if time_area < time_len {
+                    let prev_time_zoom = Note::next(time_zoom);
+                    if prev_time_zoom > 384 {
+                        break
+                    }
+                    let prev_time_area = time_axis * prev_time_zoom;
+                    if prev_time_area <= time_len {
+                        self.time_zoom().set(prev_time_zoom);
+                    } else {
+                        break
+                    }
+                }
+            }
+            if time_zoom != self.time_zoom().get() {
+                self.redraw()
+            }
+        }
+        //while time_len.div_ceil(time_zoom) > time_axis {
+            //println!("\r{time_len} {time_zoom} {time_axis}");
+            //time_zoom = Note::next(time_zoom);
+        //}
+        //self.time_zoom().set(time_zoom);
+    }
+}