text useful

src/main.rs

@@ -50,28 +50,47 @@ fn main() {
 
 enum Syn {
     Real(Synthesizer),
-    Text(std::collections::HashMap<i32, (i32, i32)>),
+    Text(std::collections::HashMap<i32, std::collections::HashMap<i32, i32>>),
 }
 
 impl Syn {
     fn note_on(&mut self, a: i32, b: i32, c: i32) {
         match self {
             Syn::Real(syn) => syn.note_on(a, b, c),
-            Syn::Text(m) => eprintln!("note_on({:?}, {:?}, {:?})", a, b, c),
+            Syn::Text(m) => {
+                eprintln!("note_on({:?}, {:?}, {:?})", a, b, c);
+                match m.get_mut(&a) {
+                    Some(m2) => { m2.insert(b, c); },
+                    None => {
+                        let mut m2 = std::collections::HashMap::new();
+                        m2.insert(b, c);
+                        m.insert(a, m2);
+                    },
+                };
+            },
         };
     }
 
     fn note_off(&mut self, a: i32, b: i32) {
         match self {
             Syn::Real(syn) => syn.note_off(a, b),
-            Syn::Text(m) => eprintln!("note_off({:?}, {:?})", a, b),
+            Syn::Text(m) => {
+                eprintln!("note_off({:?}, {:?})", a, b);
+                match m.get_mut(&a) {
+                    Some(m) => { m.remove(&b); },
+                    None => {},
+                };
+
+            },
         };
     }
 
     fn render(&mut self, a: &mut [f32], b: &mut [f32]) {
         match self {
             Syn::Real(syn) => syn.render(a, b),
-            Syn::Text(m) => eprintln!("render({:?})", m),
+            Syn::Text(m) => {
+                eprintln!("render({:?})", m)
+            },
         };
     }
 }