Init

src/state/patterns_nav.rs

@@ -0,0 +1,53 @@
+#[derive(Clone, Copy, PartialEq, Eq, Default)]
+pub enum PatternsColumn {
+    #[default]
+    Banks,
+    Patterns,
+}
+
+#[derive(Clone, Copy, Default)]
+pub struct PatternsNav {
+    pub column: PatternsColumn,
+    pub bank_cursor: usize,
+    pub pattern_cursor: usize,
+}
+
+impl PatternsNav {
+    pub fn move_left(&mut self) {
+        self.column = PatternsColumn::Banks;
+    }
+
+    pub fn move_right(&mut self) {
+        self.column = PatternsColumn::Patterns;
+    }
+
+    pub fn move_up(&mut self) {
+        match self.column {
+            PatternsColumn::Banks => {
+                self.bank_cursor = (self.bank_cursor + 15) % 16;
+            }
+            PatternsColumn::Patterns => {
+                self.pattern_cursor = (self.pattern_cursor + 15) % 16;
+            }
+        }
+    }
+
+    pub fn move_down(&mut self) {
+        match self.column {
+            PatternsColumn::Banks => {
+                self.bank_cursor = (self.bank_cursor + 1) % 16;
+            }
+            PatternsColumn::Patterns => {
+                self.pattern_cursor = (self.pattern_cursor + 1) % 16;
+            }
+        }
+    }
+
+    pub fn selected_bank(&self) -> usize {
+        self.bank_cursor
+    }
+
+    pub fn selected_pattern(&self) -> usize {
+        self.pattern_cursor
+    }
+}