add tooltip

crates/core/Cargo.toml

@@ -28,6 +28,7 @@ full = [
     "input",
     "popover",
     "scroll_area",
+    "tooltip",
     "menu",
     "dialog",
     "sheet",

crates/core/src/button.rs

@@ -2,17 +2,20 @@
 
 use gpui::prelude::FluentBuilder as _;
 use gpui::{
-    App, BoxShadow, ClickEvent, ElementId, InteractiveElement as _, IntoElement,
+    AnyView, App, BoxShadow, ClickEvent, ElementId, InteractiveElement as _, IntoElement,
     ParentElement as _, RenderOnce, Role, SharedString, StatefulInteractiveElement as _,
     Styled as _, Window, px, relative,
 };
 use gpui_native_icons::{IconRole, icon};
 use gpui_native_theme::{ActiveTheme as _, Size};
+use std::rc::Rc;
 
 use crate::common::{Sizable, h_flex};
 
 /// The single activation handler, shared by pointer, Enter, and Space.
 type ClickHandler = Box<dyn Fn(&ClickEvent, &mut Window, &mut App)>;
+/// The tooltip view builder gpui's `.tooltip(...)` expects.
+type TooltipBuilder = Rc<dyn Fn(&mut Window, &mut App) -> AnyView>;
 
 /// Which visual treatment a button uses.
 #[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
@@ -38,6 +41,7 @@ pub struct Button {
     size: Size,
     disabled: bool,
     a11y_label: Option<SharedString>,
+    tooltip: Option<TooltipBuilder>,
     on_click: Option<ClickHandler>,
 }
 
@@ -55,6 +59,7 @@ impl Button {
             size: Size::default(),
             disabled: false,
             a11y_label: None,
+            tooltip: None,
             on_click: None,
         }
     }
@@ -74,6 +79,15 @@ impl Button {
         self
     }
 
+    /// Shows a tooltip view next to the button after it is hovered.
+    pub fn tooltip<F>(mut self, tooltip: F) -> Self
+    where
+        F: Fn(&mut Window, &mut App) -> AnyView + 'static,
+    {
+        self.tooltip = Some(Rc::new(tooltip));
+        self
+    }
+
     /// Sets the visual treatment.
     pub fn variant(mut self, variant: ButtonVariant) -> Self {
         self.variant = variant;
@@ -173,6 +187,9 @@ impl RenderOnce for Button {
             })
             .when_some(self.label, |button, label| button.child(label))
             .when(self.disabled, |button| button.opacity(0.5))
+            .when_some(self.tooltip, |button, tooltip| {
+                button.tooltip(move |window, cx| tooltip(window, cx))
+            })
             .when(!self.disabled, |button| {
                 button
                     .cursor_pointer()

crates/core/src/lib.rs

@@ -45,6 +45,9 @@ pub mod popover;
 #[cfg(feature = "scroll_area")]
 pub mod scroll_area;
 
+#[cfg(feature = "tooltip")]
+pub mod tooltip;
+
 /// Initializes everything the components need at startup.
 pub fn init(cx: &mut App) {
     gpui_native_theme::Theme::init(cx);

docs/PLAN.md

@@ -212,7 +212,7 @@ Each row is one review unit: build it, show it in the gallery, review, then move
 | 11.5 | core | ScrollArea + Scrollbar | ✅ Landed (2026-10-29). Inserted before the remaining overlays — Menus, Lists and Tables all scroll. gpui owns the mechanics (`overflow_*_scroll` + caller-held `ScrollHandle`); the component paints an overlay thumb (`scrollbar_thumb` token, `Scrollbar` metrics) with drag and geometry unit-tested. Wheel input is gpui's; the area stops wheel propagation so nested areas don't co-scroll. Horizontal thumb deferred; auto-hide on idle deferred |
 | 12 | core | Menu | ✅ Landed (2026-10-29). Controlled `open`/`on_change` + `trigger`/`items` (MenuItem: label, icon, shortcut hint, disabled, destructive, checked, separator). Popover shell patterns duplicated per D16 (promote at Dialog); panel = surface + overlay radius + popover elevation, role Menu; claims focus while open; keyboard nav — arrows/home/end over selectable items (wrapping, skipping separators + disabled), enter/space activates (closes menu before the action), escape dismisses; hover selects, click activates; trigger clicks toggle (popover-owned); selection resets on each open; long menus scroll via the ScrollArea once a height is styled. Deferred: submenus, type-ahead, scroll-selected-item-into-view, real shortcut handling |
 | 11 | core | Popover | ✅ Landed (2026-10-29). First overlay. Controlled `open` + `on_change` (Rc-shared handler); `trigger`/`content` element closures; panel = surface + `Radius.overlay` + `Elevations.popover` + border, role Dialog with label; `anchored()` + `deferred()` (window-overflow flip for free); enter fade via gpui `with_animation` at `Motion.overlay` (respects reduce-motion); claims keyboard focus while open; escape and click-outside dismiss (outside clicks swallowed). No scrim — native macOS popover model; the overlay token waits for Dialog. Known v1 gaps: no exit animation, trigger aria-expanded left to the app |
-| 11+ | core | Tooltip, Menu, Dialog, AlertDialog, Sheet, Toast | One unit each, same gate. Menu reuses the popover shell + `Radius.overlay`/`Elevations.popover`; Dialog consumes `colors.overlay` (scrim) + `Elevations.dialog` |
+| 11+ | core | Menu ✅ (2026-10-29), Tooltip ✅ (2026-10-29), Dialog, AlertDialog, Sheet, Toast | One unit each, same gate. Menu reuses the popover shell + `Radius.overlay`/`Elevations.popover`; Dialog consumes `colors.overlay` (scrim) + `Elevations.dialog`. Tooltip rides gpui's own `.tooltip()` lifecycle (hover delay, anchoring, dismissal — all framework-owned); ours is the styled view (`surface` + border + `Radius.sm`, small text) plus a `Tooltip::text` closure and a Button passthrough |
 | then | data (new) | List, Table, Tree, Tabs, Sidebar | Created on demand, same gate. |
 | then | pickers or data | Calendar/DatePicker, TimeField, ColorPicker | Decide at unit time. |
 | editor | editor (new) | Text/code editor, syntax highlighting (D12) | Same gate. |

examples/gallery/src/main.rs

@@ -18,6 +18,7 @@ use gpui_native_core::scroll_area::ScrollArea;
 use gpui_native_core::slider::Slider;
 use gpui_native_core::switch::Switch;
 use gpui_native_core::toggle::Toggle;
+use gpui_native_core::tooltip::Tooltip;
 use gpui_native_icons::{IconAssets, IconRole, icon};
 use gpui_native_theme::{ActiveTheme as _, Theme};
 use gpui_platform::application;
@@ -190,7 +191,9 @@ impl Render for Gallery {
                             .gap_2()
                             .children(button_variants.map(|(name, variant)| {
                                 let gallery = gallery.clone();
-                                Button::new(SharedString::from(format!("gallery-button-{name}")))
+                                let mut button = Button::new(SharedString::from(format!(
+                                    "gallery-button-{name}"
+                                )))
                                 .label(button_label(variant))
                                 .variant(variant)
                                 .on_click(move |_, _, cx| {
@@ -198,7 +201,12 @@ impl Render for Gallery {
                                         gallery.button_clicks += 1;
                                         cx.notify();
                                     });
-                                    })
+                                });
+                                if variant == ButtonVariant::Destructive {
+                                    button =
+                                        button.tooltip(Tooltip::text("Removes the selected item"));
+                                }
+                                button
                             }))
                             .child(
                                 Button::new("gallery-button-disabled")
@@ -208,7 +216,8 @@ impl Render for Gallery {
                             .child(
                                 Button::new("gallery-button-icon")
                                     .label("Open")
-                                    .icon(IconRole::Folder),
+                                    .icon(IconRole::Folder)
+                                    .tooltip(Tooltip::text("Opens the selected file")),
                             ),
                     )
                     .child(