cosmic/widget/dropdown/
operation.rs

1// Copyright 2025 System76 <info@system76.com>
2// SPDX-License-Identifier: MPL-2.0 AND MIT
3//! Operate on dropdown widgets.
4
5use super::State;
6use iced::Rectangle;
7use iced_core::widget::{Id, Operation};
8
9pub trait Dropdown {
10    fn close(&mut self);
11    fn open(&mut self);
12}
13
14// /// Produces a [`Task`] that closes a [`Dropdown`] popup.
15// pub fn close<T>(id: Id) -> impl Operation<T> {
16//     struct Close(Id);
17
18//     impl<T> Operation<T> for Close {
19//         fn custom(&mut self, state: &mut dyn std::any::Any, id: Option<&Id>) {
20//             if id.map_or(true, |id| id != &self.0) {
21//                 return;
22//             }
23
24//             let Some(state) = state.downcast_mut::<State>() else {
25//                 return;
26//             };
27
28//             state.close();
29//         }
30
31//         fn container(
32//             &mut self,
33//             _id: Option<&Id>,
34//             _bounds: Rectangle,
35//             operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>),
36//         ) {
37//             operate_on_children(self)
38//         }
39//     }
40
41//     Close(id)
42// }
43
44// /// Produces a [`Task`] that opens a [`Dropdown`] popup.
45// pub fn open<T>(id: Id) -> impl Operation<T> {
46//     struct Open(Id);
47
48//     impl<T> Operation<T> for Open {
49//         fn custom(&mut self, state: &mut dyn std::any::Any, id: Option<&Id>) {
50//             if id.map_or(true, |id| id != &self.0) {
51//                 return;
52//             }
53
54//             let Some(state) = state.downcast_mut::<State>() else {
55//                 return;
56//             };
57
58//             state.open();
59//         }
60
61//         fn container(
62//             &mut self,
63//             _id: Option<&Id>,
64//             _bounds: Rectangle,
65//             operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>),
66//         ) {
67//             operate_on_children(self)
68//         }
69//     }
70
71//     Open(id)
72// }
cosmic/widget/dropdown/operation.rs

cosmic/widget/dropdown/
operation.rs
