proper widgetid + slot vec instead of map

core/src/render/primitive.rs

@@ -1,19 +1,18 @@
 use std::ops::{Deref, DerefMut};
 
 use crate::{
-    Color, UiRegion,
+    Color, UiRegion, WidgetId,
     render::{
         ArrBuf,
         data::{MaskIdx, PrimitiveInstance},
     },
-    util::Id,
 };
 use bytemuck::Pod;
 use wgpu::*;
 
 pub struct Primitives {
     instances: Vec<PrimitiveInstance>,
-    assoc: Vec<Id>,
+    assoc: Vec<WidgetId>,
     data: PrimitiveData,
     free: Vec<usize>,
     pub updated: bool,
@@ -99,7 +98,7 @@ macro_rules! primitives {
 }
 
 pub struct PrimitiveInst<P> {
-    pub id: Id,
+    pub id: WidgetId,
     pub primitive: P,
     pub region: UiRegion,
     pub mask_idx: MaskIdx,
@@ -175,7 +174,7 @@ impl Primitives {
 }
 
 pub struct PrimitiveChange {
-    pub id: Id,
+    pub id: WidgetId,
     pub old: usize,
     pub new: usize,
 }