handlers and ids

src/extensions/mod.rs

@@ -1,11 +1,34 @@
+pub mod id;
 pub mod tick;
 pub mod velocity;
 
-use std::sync::Arc;
+use std::{
+    fmt::Debug,
+    sync::{Arc, Mutex},
+};
 
-use crate::widget::Widget;
+use crate::{render_scope::RenderScope, widget::Widget};
 
 pub trait Extension {
-    fn init(&self, _widgets: &Vec<Arc<Widget>>) {}
-    fn render(&self, _widget: &Arc<Widget>) {}
+    fn init(&mut self, _widgets: &Vec<Arc<Widget>>) {}
+    fn render_widget(&mut self, _scope: &mut RenderScope, _widget: &Arc<Widget>) {}
+}
+
+#[derive(Clone)]
+pub struct Handler(pub Arc<Mutex<dyn FnMut(&Arc<Widget>) + Send + Sync>>);
+
+impl Handler {
+    pub fn new<F: FnMut(&Arc<Widget>) + Send + Sync + 'static>(f: F) -> Handler {
+        Handler(Arc::new(Mutex::new(f)))
+    }
+
+    pub fn call(&self, w: &Arc<Widget>) {
+        (self.0.lock().unwrap())(w)
+    }
+}
+
+impl Debug for Handler {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "Handler")
+    }
 }