Use bitfield instead of bools in Response and Sense

Cargo.lock

@@ -1260,6 +1260,7 @@ dependencies = [
  "accesskit",
  "ahash",
  "backtrace",
+ "bitflags 2.6.0",
  "document-features",
  "emath",
  "epaint",

Cargo.toml

@@ -73,6 +73,7 @@ ahash = { version = "0.8.11", default-features = false, features = [
     "std",
 ] }
 backtrace = "0.3"
+bitflags = "2.6"
 bytemuck = "1.7.2"
 criterion = { version = "0.5.1", default-features = false }
 dify = { version = "0.7", default-features = false }

README.md

@@ -150,6 +150,7 @@ Light Theme:
 * [`ahash`](https://crates.io/crates/ahash)
 * [`nohash-hasher`](https://crates.io/crates/nohash-hasher)
 * [`parking_lot`](https://crates.io/crates/parking_lot)
+* [`bitflags`](https://crates.io/crates/bitflags)
 
 Heavier dependencies are kept out of `egui`, even as opt-in.
 No code that isn't fully Wasm-friendly is part of `egui`.

crates/egui/Cargo.toml

@@ -84,6 +84,7 @@ emath = { workspace = true, default-features = false }
 epaint = { workspace = true, default-features = false }
 
 ahash.workspace = true
+bitflags.workspace = true
 nohash-hasher.workspace = true
 profiling.workspace = true
 

crates/egui/src/containers/modal.rs

@@ -86,11 +86,7 @@ impl Modal {
             response,
         } = area.show(ctx, |ui| {
             let bg_rect = ui.ctx().screen_rect();
-            let bg_sense = Sense {
-                click: true,
-                drag: true,
-                focusable: false,
-            };
+            let bg_sense = Sense::CLICK | Sense::DRAG;
             let mut backdrop = ui.new_child(UiBuilder::new().sense(bg_sense).max_rect(bg_rect));
             backdrop.set_min_size(bg_rect.size());
             ui.painter().rect_filled(bg_rect, 0.0, backdrop_color);
@@ -101,14 +97,9 @@ impl Modal {
             // We need the extra scope with the sense since frame can't have a sense and since we
             // need to prevent the clicks from passing through to the backdrop.
             let inner = ui
-                .scope_builder(
-                    UiBuilder::new().sense(Sense {
-                        click: true,
-                        drag: true,
-                        focusable: false,
-                    }),
-                    |ui| frame.show(ui, content).inner,
-                )
+                .scope_builder(UiBuilder::new().sense(Sense::CLICK | Sense::DRAG), |ui| {
+                    frame.show(ui, content).inner
+                })
                 .inner;
 
             (inner, backdrop_response)

crates/egui/src/context.rs

@@ -30,7 +30,7 @@ use crate::{
     os::OperatingSystem,
     output::FullOutput,
     pass_state::PassState,
-    resize, scroll_area,
+    resize, response, scroll_area,
     util::IdTypeMap,
     viewport::ViewportClass,
     Align2, CursorIcon, DeferredViewportUiCallback, FontDefinitions, Grid, Id, ImmediateViewport,
@@ -1151,8 +1151,9 @@ impl Context {
     /// same widget, then `allow_focus` should only be true once (like in [`Ui::new`] (true) and [`Ui::remember_min_rect`] (false)).
     #[allow(clippy::too_many_arguments)]
     pub(crate) fn create_widget(&self, w: WidgetRect, allow_focus: bool) -> Response {
-        let interested_in_focus =
-            w.enabled && w.sense.focusable && self.memory(|mem| mem.allows_interaction(w.layer_id));
+        let interested_in_focus = w.enabled
+            && w.sense.is_focusable()
+            && self.memory(|mem| mem.allows_interaction(w.layer_id));
 
         // Remember this widget
         self.write(|ctx| {
@@ -1173,15 +1174,15 @@ impl Context {
             self.memory_mut(|mem| mem.surrender_focus(w.id));
         }
 
-        if w.sense.interactive() || w.sense.focusable {
+        if w.sense.interactive() || w.sense.is_focusable() {
             self.check_for_id_clash(w.id, w.rect, "widget");
         }
 
         #[allow(clippy::let_and_return)]
         let res = self.get_response(w);
 
         #[cfg(feature = "accesskit")]
-        if allow_focus && w.sense.focusable {
+        if allow_focus && w.sense.is_focusable() {
             // Make sure anything that can receive focus has an AccessKit node.
             // TODO(mwcampbell): For nodes that are filled from widget info,
             // some information is written to the node twice.
@@ -1213,7 +1214,7 @@ impl Context {
     #[deprecated = "Use Response.contains_pointer or Context::read_response instead"]
     pub fn widget_contains_pointer(&self, id: Id) -> bool {
         self.read_response(id)
-            .map_or(false, |response| response.contains_pointer)
+            .map_or(false, |response| response.contains_pointer())
     }
 
     /// Do all interaction for an existing widget, without (re-)registering it.
@@ -1237,61 +1238,72 @@ impl Context {
             rect,
             interact_rect,
             sense,
-            enabled,
-            contains_pointer: false,
-            hovered: false,
-            highlighted,
-            clicked: false,
-            fake_primary_click: false,
-            long_touched: false,
-            drag_started: false,
-            dragged: false,
-            drag_stopped: false,
-            is_pointer_button_down_on: false,
+            flags: response::Flags::empty(),
             interact_pointer_pos: None,
-            changed: false,
             intrinsic_size: None,
         };
 
+        res.flags.set(response::Flags::ENABLED, enabled);
+        res.flags.set(response::Flags::HIGHLIGHTED, highlighted);
+
         self.write(|ctx| {
             let viewport = ctx.viewports.entry(ctx.viewport_id()).or_default();
 
-            res.contains_pointer = viewport.interact_widgets.contains_pointer.contains(&id);
+            res.flags.set(
+                response::Flags::CONTAINS_POINTER,
+                viewport.interact_widgets.contains_pointer.contains(&id),
+            );
 
             let input = &viewport.input;
             let memory = &mut ctx.memory;
 
             if enabled
-                && sense.click
+                && sense.senses_click()
                 && memory.has_focus(id)
                 && (input.key_pressed(Key::Space) || input.key_pressed(Key::Enter))
             {
                 // Space/enter works like a primary click for e.g. selected buttons
-                res.fake_primary_click = true;
+                res.flags.set(response::Flags::FAKE_PRIMARY_CLICKED, true);
             }
 
             #[cfg(feature = "accesskit")]
             if enabled
-                && sense.click
+                && sense.senses_click()
                 && input.has_accesskit_action_request(id, accesskit::Action::Click)
             {
-                res.fake_primary_click = true;
+                res.flags.set(response::Flags::FAKE_PRIMARY_CLICKED, true);
             }
 
-            if enabled && sense.click && Some(id) == viewport.interact_widgets.long_touched {
-                res.long_touched = true;
+            if enabled && sense.senses_click() && Some(id) == viewport.interact_widgets.long_touched
+            {
+                res.flags.set(response::Flags::LONG_TOUCHED, true);
             }
 
             let interaction = memory.interaction();
 
-            res.is_pointer_button_down_on = interaction.potential_click_id == Some(id)
-                || interaction.potential_drag_id == Some(id);
+            res.flags.set(
+                response::Flags::IS_POINTER_BUTTON_DOWN_ON,
+                interaction.potential_click_id == Some(id)
+                    || interaction.potential_drag_id == Some(id),
+            );
 
-            if res.enabled {
-                res.hovered = viewport.interact_widgets.hovered.contains(&id);
-                res.dragged = Some(id) == viewport.interact_widgets.dragged;
-                res.drag_started = Some(id) == viewport.interact_widgets.drag_started;
-                res.drag_stopped = Some(id) == viewport.interact_widgets.drag_stopped;
+            if res.enabled() {
+                res.flags.set(
+                    response::Flags::HOVERED,
+                    viewport.interact_widgets.hovered.contains(&id),
+                );
+                res.flags.set(
+                    response::Flags::DRAGGED,
+                    Some(id) == viewport.interact_widgets.dragged,
+                );
+                res.flags.set(
+                    response::Flags::DRAG_STARTED,
+                    Some(id) == viewport.interact_widgets.drag_started,
+                );
+                res.flags.set(
+                    response::Flags::DRAG_STOPPED,
+                    Some(id) == viewport.interact_widgets.drag_stopped,
+                );
             }
 
             let clicked = Some(id) == viewport.interact_widgets.clicked;
@@ -1304,20 +1316,23 @@ impl Context {
                         any_press = true;
                     }
                     PointerEvent::Released { click, .. } => {
-                        if enabled && sense.click && clicked && click.is_some() {
-                            res.clicked = true;
+                        if enabled && sense.senses_click() && clicked && click.is_some() {
+                            res.flags.set(response::Flags::CLICKED, true);
                         }
 
-                        res.is_pointer_button_down_on = false;
-                        res.dragged = false;
+                        res.flags
+                            .set(response::Flags::IS_POINTER_BUTTON_DOWN_ON, false);
+                        res.flags.set(response::Flags::DRAGGED, false);
                     }
                 }
             }
 
             // is_pointer_button_down_on is false when released, but we want interact_pointer_pos
             // to still work.
-            let is_interacted_with =
-                res.is_pointer_button_down_on || res.long_touched || clicked || res.drag_stopped;
+            let is_interacted_with = res.is_pointer_button_down_on()
+                || res.long_touched()
+                || clicked
+                || res.drag_stopped();
             if is_interacted_with {
                 res.interact_pointer_pos = input.pointer.interact_pos();
                 if let (Some(to_global), Some(pos)) = (
@@ -1330,10 +1345,10 @@ impl Context {
 
             if input.pointer.any_down() && !is_interacted_with {
                 // We don't hover widgets while interacting with *other* widgets:
-                res.hovered = false;
+                res.flags.set(response::Flags::HOVERED, false);
             }
 
-            let pointer_pressed_elsewhere = any_press && !res.hovered;
+            let pointer_pressed_elsewhere = any_press && !res.hovered();
             if pointer_pressed_elsewhere && memory.has_focus(id) {
                 memory.surrender_focus(id);
             }
@@ -2152,11 +2167,12 @@ impl Context {
                 let painter = Painter::new(self.clone(), *layer_id, Rect::EVERYTHING);
                 for rect in rects {
                     if rect.sense.interactive() {
-                        let (color, text) = if rect.sense.click && rect.sense.drag {
+                        let (color, text) = if rect.sense.senses_click() && rect.sense.senses_drag()
+                        {
                             (Color32::from_rgb(0x88, 0, 0x88), "click+drag")
-                        } else if rect.sense.click {
+                        } else if rect.sense.senses_click() {
                             (Color32::from_rgb(0x88, 0, 0), "click")
-                        } else if rect.sense.drag {
+                        } else if rect.sense.senses_drag() {
                             (Color32::from_rgb(0, 0, 0x88), "drag")
                         } else {
                             // unreachable since we only show interactive
@@ -3131,7 +3147,7 @@ impl Context {
                     // TODO(emilk): `Sense::hover_highlight()`
                     let response =
                         ui.add(Label::new(RichText::new(text).monospace()).sense(Sense::click()));
-                    if response.hovered && is_visible {
+                    if response.hovered() && is_visible {
                         ui.ctx()
                             .debug_painter()
                             .debug_rect(area.rect(), Color32::RED, "");