wip: enabling standalone arranger

crates/tek_sequencer/src/arranger_view.rs

@@ -0,0 +1,16 @@
+/// Display mode of arranger
+pub enum ArrangerViewMode {
+    Vertical,
+    VerticalCompact,
+    Horizontal,
+}
+
+impl ArrangerViewMode {
+    pub fn to_next (&mut self) {
+        *self = match self {
+            Self::Vertical        => Self::VerticalCompact,
+            Self::VerticalCompact => Self::Horizontal,
+            Self::Horizontal      => Self::Vertical,
+        }
+    }
+}