redesign

src/widget.rs

@@ -0,0 +1,53 @@
+use std::{
+    any::{Any, TypeId},
+    collections::HashMap,
+    sync::{Arc, Mutex},
+};
+
+use crate::render_scope::RenderScope;
+
+pub trait Element {
+    #[allow(unused)]
+    fn render(&mut self, scope: &mut RenderScope) {}
+    fn as_any(&self) -> &dyn Any;
+    fn as_any_mut(&mut self) -> &mut dyn Any;
+}
+
+pub trait Component {
+    fn as_any(&self) -> &dyn Any;
+    fn as_any_mut(&mut self) -> &mut dyn Any;
+}
+
+pub struct Widget(
+    pub Mutex<Box<dyn Element>>,
+    Mutex<HashMap<TypeId, Box<dyn Component>>>,
+);
+
+impl Widget {
+    pub fn new(e: Box<dyn Element>) -> Self {
+        Self(Mutex::new(e), Mutex::new(HashMap::new()))
+    }
+
+    pub fn component<C: Component + 'static>(self: &Arc<Self>, c: C) -> &Arc<Self> {
+        self.1
+            .lock()
+            .unwrap()
+            .entry(c.type_id())
+            .or_insert_with(|| Box::new(c));
+        self
+    }
+
+    pub fn set_component<C: Component + 'static>(self: &Arc<Self>, c: C) -> &Arc<Self> {
+        self.1.lock().unwrap().insert(c.type_id(), Box::new(c));
+        self
+    }
+
+    pub fn get<C: Component + 'static + Clone>(&self) -> Option<C> {
+        self.1
+            .lock()
+            .unwrap()
+            .get(&TypeId::of::<C>())
+            .and_then(|c| c.as_any().downcast_ref::<C>())
+            .map(|c| c.clone())
+    }
+}