feat: add sub menu and panel min width to menus

crates/core/src/dropdown_menu.rs

@@ -5,9 +5,9 @@ use std::rc::Rc;
 
 use gpui::prelude::FluentBuilder as _;
 use gpui::{
-    App, ClickEvent, DispatchPhase, ElementId, InteractiveElement as _, IntoElement, KeyDownEvent,
-    MouseButton, MouseDownEvent, ParentElement as _, RenderOnce, Role, SharedString,
-    StatefulInteractiveElement as _, Styled as _, Window, canvas, div, relative,
+    App, ClickEvent, DefiniteLength, DispatchPhase, ElementId, InteractiveElement as _,
+    IntoElement, KeyDownEvent, MouseButton, MouseDownEvent, ParentElement as _, RenderOnce, Role,
+    SharedString, StatefulInteractiveElement as _, Styled as _, Window, canvas, div, relative,
 };
 use gpui_native_icons::{Icon, IconRole, icon};
 use gpui_native_theme::{ActiveTheme as _, BORDER_WIDTH, Size};
@@ -15,7 +15,9 @@ use gpui_native_utils::{focus_handle, focus_ring};
 
 use crate::button::ButtonVariant;
 use crate::common::{Sizable, h_flex};
-use crate::menu::{ChangeHandler, MenuChrome, MenuItem, TriggerBoundsCell, anchored_menu_panel};
+use crate::menu::{
+    ChangeHandler, MenuChrome, MenuItem, MenuPanelSpec, TriggerBoundsCell, anchored_menu_panel,
+};
 use crate::spinner::Spinner;
 
 /// The main zone's activation handler, shared by pointer, Enter, and Space.
@@ -38,6 +40,7 @@ pub struct DropdownMenu {
     on_click: Option<ClickHandler>,
     on_open_change: Option<ChangeHandler>,
     items: Option<ItemsFn>,
+    min_width: Option<DefiniteLength>,
 }
 
 impl DropdownMenu {
@@ -60,6 +63,7 @@ impl DropdownMenu {
             on_click: None,
             on_open_change: None,
             items: None,
+            min_width: None,
         }
     }
 
@@ -146,6 +150,15 @@ impl DropdownMenu {
         self.items = Some(Box::new(items));
         self
     }
+
+    /// Sets the panel's minimum width, defaults to the standard menu width.
+    pub fn min_width<W>(mut self, width: W) -> Self
+    where
+        W: Into<DefiniteLength>,
+    {
+        self.min_width = Some(width.into());
+        self
+    }
 }
 
 impl Sizable for DropdownMenu {
@@ -374,6 +387,21 @@ impl RenderOnce for DropdownMenu {
             Rc::from([])
         };
 
+        let on_close = Some(on_open.clone());
+
+        let spec = MenuPanelSpec {
+            open: self.open,
+            items,
+            initial_selection: None,
+            preselect: *keyboard_open.read(cx),
+            min_width: self.min_width,
+            label,
+            position: None,
+            trigger_bounds: trigger_bounds.clone(),
+            on_dismiss: on_close.clone(),
+            on_activate: on_close,
+        };
+
         div()
             .relative()
             .child(
@@ -431,21 +459,7 @@ impl RenderOnce for DropdownMenu {
             )
             .child(trigger)
             .when_some(
-                anchored_menu_panel(
-                    window,
-                    cx,
-                    &self.id,
-                    self.open,
-                    items,
-                    None,
-                    *keyboard_open.read(cx),
-                    Some(on_open),
-                    label,
-                    None,
-                    &trigger_bounds,
-                    &panel_chrome,
-                    enter_duration,
-                ),
+                anchored_menu_panel(window, cx, &self.id, spec, &panel_chrome, enter_duration),
                 |wrapper, panel| wrapper.child(panel),
             )
     }