iced_core/widget/operation/
text_input.rs

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1//! Operate on widgets that have text input.
2use crate::Rectangle;
3use crate::widget::Id;
4use crate::widget::operation::Operation;
5
6/// The internal state of a widget that has text input.
7pub trait TextInput {
8    /// Moves the cursor of the text input to the front of the input text.
9    fn move_cursor_to_front(&mut self);
10    /// Moves the cursor of the text input to the end of the input text.
11    fn move_cursor_to_end(&mut self);
12    /// Moves the cursor of the text input to an arbitrary location.
13    fn move_cursor_to(&mut self, position: usize);
14    /// Selects all the content of the text input.
15    fn select_all(&mut self);
16}
17
18/// Produces an [`Operation`] that moves the cursor of the widget with the given [`Id`] to the
19/// front.
20pub fn move_cursor_to_front<T>(target: Id) -> impl Operation<T> {
21    struct MoveCursor {
22        target: Id,
23    }
24
25    impl<T> Operation<T> for MoveCursor {
26        fn text_input(
27            &mut self,
28            id: Option<&Id>,
29            _bounds: Rectangle,
30            state: &mut dyn TextInput,
31        ) {
32            match id {
33                Some(id) if id == &self.target => {
34                    state.move_cursor_to_front();
35                }
36                _ => {}
37            }
38        }
39
40        fn container(
41            &mut self,
42            _id: Option<&Id>,
43            _bounds: Rectangle,
44            operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>),
45        ) {
46            operate_on_children(self);
47        }
48    }
49
50    MoveCursor { target }
51}
52
53/// Produces an [`Operation`] that moves the cursor of the widget with the given [`Id`] to the
54/// end.
55pub fn move_cursor_to_end<T>(target: Id) -> impl Operation<T> {
56    struct MoveCursor {
57        target: Id,
58    }
59
60    impl<T> Operation<T> for MoveCursor {
61        fn text_input(
62            &mut self,
63            id: Option<&Id>,
64            _bounds: Rectangle,
65            state: &mut dyn TextInput,
66        ) {
67            match id {
68                Some(id) if id == &self.target => {
69                    state.move_cursor_to_end();
70                }
71                _ => {}
72            }
73        }
74
75        fn container(
76            &mut self,
77            _id: Option<&Id>,
78            _bounds: Rectangle,
79            operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>),
80        ) {
81            operate_on_children(self);
82        }
83    }
84
85    MoveCursor { target }
86}
87
88/// Produces an [`Operation`] that moves the cursor of the widget with the given [`Id`] to the
89/// provided position.
90pub fn move_cursor_to<T>(target: Id, position: usize) -> impl Operation<T> {
91    struct MoveCursor {
92        target: Id,
93        position: usize,
94    }
95
96    impl<T> Operation<T> for MoveCursor {
97        fn text_input(
98            &mut self,
99            id: Option<&Id>,
100            _bounds: Rectangle,
101            state: &mut dyn TextInput,
102        ) {
103            match id {
104                Some(id) if id == &self.target => {
105                    state.move_cursor_to(self.position);
106                }
107                _ => {}
108            }
109        }
110
111        fn container(
112            &mut self,
113            _id: Option<&Id>,
114            _bounds: Rectangle,
115            operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>),
116        ) {
117            operate_on_children(self);
118        }
119    }
120
121    MoveCursor { target, position }
122}
123
124/// Produces an [`Operation`] that selects all the content of the widget with the given [`Id`].
125pub fn select_all<T>(target: Id) -> impl Operation<T> {
126    struct MoveCursor {
127        target: Id,
128    }
129
130    impl<T> Operation<T> for MoveCursor {
131        fn text_input(
132            &mut self,
133            id: Option<&Id>,
134            _bounds: Rectangle,
135            state: &mut dyn TextInput,
136        ) {
137            match id {
138                Some(id) if id == &self.target => {
139                    state.select_all();
140                }
141                _ => {}
142            }
143        }
144
145        fn container(
146            &mut self,
147            _id: Option<&Id>,
148            _bounds: Rectangle,
149            operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>),
150        ) {
151            operate_on_children(self);
152        }
153    }
154
155    MoveCursor { target }
156}
iced_core/widget/operation/text_input.rs

iced_core/widget/operation/
text_input.rs
