Make scroll bars and resize splitters visible to accesskit (#7804)

crates/egui/src/containers/scroll_area.rs

@@ -9,7 +9,8 @@ use epaint::Margin;
 
 use crate::{
     Context, CursorIcon, Id, NumExt as _, Pos2, Rangef, Rect, Response, Sense, Ui, UiBuilder,
-    UiKind, UiStackInfo, Vec2, Vec2b, emath, epaint, lerp, pass_state, pos2, remap, remap_clamp,
+    UiKind, UiStackInfo, Vec2, Vec2b, WidgetInfo, emath, epaint, lerp, pass_state, pos2, remap,
+    remap_clamp,
 };
 
 #[derive(Clone, Copy, Debug)]
@@ -1286,6 +1287,8 @@ impl Prepared {
             // Also: it make sense to detect any hover where the scroll bar _will_ be.
             let response = ui.interact(max_bar_rect, interact_id, sense);
 
+            response.widget_info(|| WidgetInfo::new(crate::WidgetType::ScrollBar));
+
             // top/bottom of a horizontal scroll (d==0).
             // left/rigth of a vertical scroll (d==1).
             let cross = if scroll_style.floating {

crates/egui/src/containers/window.rs

@@ -959,6 +959,9 @@ fn resize_interaction(
             },
             true,
         );
+
+        response.widget_info(|| WidgetInfo::new(crate::WidgetType::ResizeHandle));
+
         SideResponse {
             hover: response.hovered(),
             drag: response.dragged(),

crates/egui/src/data/output.rs

@@ -679,6 +679,8 @@ impl WidgetInfo {
             WidgetType::Panel => "panel",
             WidgetType::ProgressIndicator => "progress indicator",
             WidgetType::Window => "window",
+            WidgetType::ScrollBar => "scroll bar",
+            WidgetType::ResizeHandle => "resize handle",
             WidgetType::Label | WidgetType::Other => "",
         };
 

crates/egui/src/lib.rs

@@ -663,6 +663,10 @@ pub enum WidgetType {
 
     Window,
 
+    ResizeHandle,
+
+    ScrollBar,
+
     /// If you cannot fit any of the above slots.
     ///
     /// If this is something you think should be added, file an issue.

crates/egui/src/response.rs

@@ -871,6 +871,10 @@ impl Response {
             WidgetType::Panel => Role::Pane,
             WidgetType::ProgressIndicator => Role::ProgressIndicator,
             WidgetType::Window => Role::Window,
+
+            WidgetType::ResizeHandle => Role::Splitter,
+            WidgetType::ScrollBar => Role::ScrollBar,
+
             WidgetType::Other => Role::Unknown,
         });
         if !info.enabled {