track: remove ports on delete

crates/app/src/model.rs

@@ -92,7 +92,12 @@ impl Tek {
             width:  (name.len() + 2).max(12),
             color:  color.unwrap_or_else(ItemTheme::random),
             player: MidiPlayer::new(
-                &format!("{name}"), self.jack(), Some(self.clock()), None, mins, mouts
+                &format!("{name}"),
+                self.jack(),
+                Some(self.clock()),
+                None,
+                mins,
+                mouts
             )?,
             name,
             ..Default::default()
@@ -120,11 +125,22 @@ impl Tek {
     }
 
     /// Delete a track
-    pub fn track_del (&mut self, index: usize) {
+    pub fn track_del (&mut self, index: usize) -> Usually<()> {
-        self.tracks_mut().remove(index);
+        let exists = self.tracks().get(index).is_some();
-        for scene in self.scenes_mut().iter_mut() {
+        if exists {
-            scene.clips.remove(index);
+            let track = self.tracks_mut().remove(index);
+            let Track { player: MidiPlayer { midi_ins, midi_outs, .. }, .. } = track;
+            for port in midi_ins.into_iter() {
+                port.close()?;
+            }
+            for port in midi_outs.into_iter() {
+                port.close()?;
+            }
+            for scene in self.scenes_mut().iter_mut() {
+                scene.clips.remove(index);
+            }
         }
+        Ok(())
     }
 
     /// Add multiple scenes