From 47978bc50e71c143897174dbaf7e92c86d561c1c Mon Sep 17 00:00:00 2001
From: Floyd Wang <gassnake999@gmail.com>
Date: Tue, 14 Oct 2025 11:19:22 +0800
Subject: [PATCH] button: Support specified anchor to dropdown button (#1367)

---
 crates/story/src/button_story.rs        |  7 ++++---
 crates/ui/src/button/dropdown_button.rs | 14 +++++++++++++-
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/crates/story/src/button_story.rs b/crates/story/src/button_story.rs
index 7b480b76..cb6d7d6c 100644
--- a/crates/story/src/button_story.rs
+++ b/crates/story/src/button_story.rs
@@ -1,6 +1,7 @@
 use gpui::{
-    Action, App, AppContext as _, ClickEvent, Context, Entity, Focusable, InteractiveElement,
-    IntoElement, ParentElement as _, Render, Styled as _, Window, prelude::FluentBuilder, px,
+    Action, App, AppContext as _, ClickEvent, Context, Corner, Entity, Focusable,
+    InteractiveElement, IntoElement, ParentElement as _, Render, Styled as _, Window,
+    prelude::FluentBuilder, px,
 };
 
 use gpui_component::{
@@ -691,7 +692,7 @@ impl Render for ButtonStory {
                         DropdownButton::new("dropdown-button2")
                             .button(Button::new("btn").label("Click Me"))
                             .selected(selected)
-                            .popup_menu(move |this, _, _| {
+                            .popup_menu_with_anchor(Corner::BottomRight, move |this, _, _| {
                                 this.menu_with_check(
                                     "Disabled",
                                     disabled,
diff --git a/crates/ui/src/button/dropdown_button.rs b/crates/ui/src/button/dropdown_button.rs
index 1dd855e9..85406d72 100644
--- a/crates/ui/src/button/dropdown_button.rs
+++ b/crates/ui/src/button/dropdown_button.rs
@@ -25,6 +25,7 @@ pub struct DropdownButton {
     variant: Option<ButtonVariant>,
     size: Option<Size>,
     rounded: ButtonRounded,
+    anchor: Corner,
 }
 
 impl DropdownButton {
@@ -40,6 +41,7 @@ impl DropdownButton {
             variant: None,
             size: None,
             rounded: ButtonRounded::default(),
+            anchor: Corner::TopRight,
         }
     }
 
@@ -56,6 +58,16 @@ impl DropdownButton {
         self
     }
 
+    pub fn popup_menu_with_anchor(
+        mut self,
+        anchor: impl Into<Corner>,
+        popup_menu: impl Fn(PopupMenu, &mut Window, &mut Context<PopupMenu>) -> PopupMenu + 'static,
+    ) -> Self {
+        self.popup_menu = Some(Box::new(popup_menu));
+        self.anchor = anchor.into();
+        self
+    }
+
     pub fn rounded(mut self, rounded: impl Into<ButtonRounded>) -> Self {
         self.rounded = rounded.into();
         self
@@ -158,7 +170,7 @@ impl RenderOnce for DropdownButton {
                             .when_some(self.outline, |this, _| this.outline())
                             .when_some(self.size, |this, size| this.with_size(size))
                             .when_some(self.variant, |this, variant| this.with_variant(variant))
-                            .popup_menu_with_anchor(Corner::TopRight, move |this, window, cx| {
+                            .popup_menu_with_anchor(self.anchor, move |this, window, cx| {
                                 popup_menu(this, window, cx)
                             }),
                     )