control transport values

src/model/transport.rs

@@ -1,16 +1,43 @@
 use crate::core::*;
 
+#[derive(PartialEq)]
+pub enum TransportFocus {
+    BPM,
+    Quant,
+    Sync,
+}
+
+impl TransportFocus {
+    pub fn prev (&mut self) {
+        *self = match self {
+            Self::BPM   => Self::Sync,
+            Self::Quant => Self::BPM,
+            Self::Sync  => Self::Quant,
+        }
+    }
+    pub fn next (&mut self) {
+        *self = match self {
+            Self::BPM   => Self::Quant,
+            Self::Quant => Self::Sync,
+            Self::Sync  => Self::BPM,
+        }
+    }
+}
+
 pub struct TransportToolbar {
     pub metronome: bool,
     pub mode:      bool,
     pub focused:   bool,
     pub entered:   bool,
+    pub selected:  TransportFocus,
     /// Current sample rate, tempo, and PPQ.
     pub timebase:  Arc<Timebase>,
     /// JACK transport handle.
     transport:     Option<Transport>,
     /// Quantization factor
     pub quant:     usize,
+    /// Global sync quant
+    pub sync:      usize,
     /// Current transport state
     pub playing:   Option<TransportState>,
     /// Current position according to transport
@@ -21,17 +48,20 @@ pub struct TransportToolbar {
 
 impl TransportToolbar {
     pub fn new (transport: Option<Transport>) -> Self {
+        let timebase = Arc::new(Timebase::default());
         Self {
-            transport,
+            selected:  TransportFocus::BPM,
             metronome: false,
             mode:      false,
             focused:   false,
             entered:   false,
-            timebase:  Arc::new(Timebase::default()),
             playhead:  0,
             playing:   Some(TransportState::Stopped),
             started:   None,
             quant:     24,
+            sync:      timebase.ppq() as usize * 4,
+            transport,
+            timebase,
         }
     }
     pub fn toggle_play (&mut self) -> Usually<()> {