Add App

src/util.rs

@@ -0,0 +1,30 @@
+use std::sync::mpsc;
+
+use egui::Id;
+use rand::{Rng, rng};
+
+pub fn random_id() -> Id {
+    Id::new(rng().random::<u64>())
+}
+
+/// An [mpsc::Sender] where the receiver is the GUI.
+#[derive(Clone)]
+pub struct GuiSender<T> {
+    tx: mpsc::Sender<T>,
+    ctx: egui::Context,
+}
+
+impl<T> GuiSender<T> {
+    pub fn new(tx: mpsc::Sender<T>, ctx: &egui::Context) -> Self {
+        Self {
+            tx,
+            ctx: ctx.clone(),
+        }
+    }
+
+    pub fn send(&self, t: T) -> Result<(), mpsc::SendError<T>> {
+        self.tx.send(t)?;
+        self.ctx.request_repaint();
+        Ok(())
+    }
+}