TEXT SELECTION

src/layout/attr.rs

@@ -0,0 +1,20 @@
+use crate::layout::{Ui, WidgetId, WidgetIdFn, WidgetLike};
+
+pub trait WidgetAttr<W> {
+    type Input;
+    fn run(ui: &mut Ui, id: &WidgetId<W>, input: Self::Input);
+}
+
+pub trait Attrable<W, Tag> {
+    fn attr<A: WidgetAttr<W>>(self, input: A::Input) -> impl WidgetIdFn<W>;
+}
+
+impl<WL: WidgetLike<Tag>, Tag> Attrable<WL::Widget, Tag> for WL {
+    fn attr<A: WidgetAttr<WL::Widget>>(self, input: A::Input) -> impl WidgetIdFn<WL::Widget> {
+        |ui| {
+            let id = self.add(ui);
+            A::run(ui, &id, input);
+            id
+        }
+    }
+}

src/layout/event.rs

@@ -55,10 +55,7 @@ impl<W: WidgetLike<Tag>, Tag> Eventable<W::Widget, Tag> for W {
     ) -> impl WidgetIdFn<W::Widget> {
         move |ui| {
             let id = self.add(ui);
-            ui.data
-                .modules
-                .get_mut::<E::Module<Ctx>>()
-                .register(id.id, event, f);
+            ui.register_event(&id, event, f);
             id
         }
     }

src/layout/mod.rs

@@ -9,6 +9,7 @@ mod painter;
 mod text;
 mod texture;
 mod ui;
+mod attr;
 mod vec2;
 mod widget;
 mod widgets;
@@ -24,6 +25,7 @@ pub use painter::*;
 pub use text::*;
 pub use texture::*;
 pub use ui::*;
+pub use attr::*;
 pub use vec2::*;
 pub use widget::*;
 pub use widgets::*;

src/layout/painter.rs

@@ -17,8 +17,6 @@ pub struct Painter<'a, 'c> {
     children: Vec<Id>,
     children_width: HashMap<Id, (UiVec2, Len)>,
     children_height: HashMap<Id, (UiVec2, Len)>,
-    /// whether this widget depends on region's final pixel size or not
-    /// TODO: decide if point (pt) should be used here instead of px
     pub layer: usize,
     id: Id,
 }

src/layout/ui.rs

@@ -3,8 +3,8 @@ use image::DynamicImage;
 use crate::{
     core::{TextEdit, TextEditCtx},
     layout::{
-        IdLike, PainterData, PixelRegion, StaticWidgetId, TextureHandle, Vec2, Widget,
-        WidgetId, WidgetInstance, WidgetLike,
+        Event, EventFn, EventModule, IdLike, PainterData, PixelRegion, StaticWidgetId,
+        TextureHandle, Vec2, Widget, WidgetId, WidgetInstance, WidgetLike,
     },
     util::{HashSet, Id},
 };
@@ -96,6 +96,18 @@ impl Ui {
         self.data.textures.add(image)
     }
 
+    pub fn register_event<W, E: Event, Ctx: 'static>(
+        &mut self,
+        id: &WidgetId<W>,
+        event: E,
+        f: impl EventFn<Ctx, E::Data>,
+    ) {
+        self.data
+            .modules
+            .get_mut::<E::Module<Ctx>>()
+            .register(id.id, event, f);
+    }
+
     pub fn resize(&mut self, size: impl Into<Vec2>) {
         self.data.output_size = size.into();
         self.resized = true;