refactor: merge plugin, sampler -> mixer; transport -> sequencer; time -> core

crates/tek_sequencer/src/transport_focus.rs

@@ -0,0 +1,23 @@
+use crate::*;
+
+#[derive(PartialEq)]
+/// Which section of the transport is focused
+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,
+        }
+    }
+}
+