finished moving out render_state

core/src/widget/like.rs

@@ -1,4 +1,4 @@
-use crate::{HasRoot, UiRsc};
+use crate::UiRsc;
 
 use super::*;
 use std::marker::Unsize;
@@ -22,15 +22,16 @@ pub trait WidgetLike<Rsc: UiRsc, Tag>: Sized {
         }
     }
 
-    fn set_root(self, rsc: &mut Rsc)
-    where
-        Rsc: HasRoot,
-    {
+    fn set_root(self, rsc: &mut Rsc, root: &mut impl HasRoot) {
         let id = self.add_strong(rsc);
-        rsc.set_root(id);
+        root.set_root(id);
     }
 }
 
+pub trait HasRoot {
+    fn set_root(&mut self, root: StrongWidget);
+}
+
 pub trait WidgetArrLike<Rsc, const LEN: usize, Tag> {
     #[track_caller]
     fn add(self, state: &mut Rsc) -> WidgetArr<LEN>;