Random colors

src/tenori.rs

@@ -1,5 +1,7 @@
-use std::time::Instant;
+use std::sync::{Arc, Mutex};
+use std::time::{Instant, SystemTime, UNIX_EPOCH};
 use rodio::OutputStream;
+use tinyrand::{Seeded, StdRand};
 use crate::grid::Grid;
 use crate::dialog::Dialog;
 use crate::noise::Note;
@@ -33,7 +35,10 @@ pub struct Tenori {
 
     /// If present, we can save to this file without asking the
     /// user to select a file first.
-    pub default_filename: Option<String>
+    pub default_filename: Option<String>,
+
+    /// A random number generator
+    pub rand: Arc<Mutex<StdRand>>,
 }
 
 impl Default for Tenori {
@@ -41,6 +46,8 @@ impl Default for Tenori {
         let output_stream = rodio::OutputStreamBuilder::open_default_stream()
             .expect("Open audio output stream");
 
+        let rand = StdRand::seed(SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs());
+
         Self {
             tempo: 90,
             timer: 0.0,
@@ -50,6 +57,7 @@ impl Default for Tenori {
             window_counter: 0,
             dialogs: vec![],
             default_filename: None,
+            rand: Arc::new(Mutex::new(rand)),
             output_stream
         }
     }