egui_bind/
lib.rs

1#![doc = include_str!("../README.md")]
2#![warn(missing_docs)]
3
4use egui::{Align2, Event, FontId, Id, Key, Margin, PointerButton, Response, Sense, Ui, Widget};
5use std::hash::Hash;
6
7mod target;
8pub use target::*;
9mod either;
10pub use either::*;
11
12/// Widget for showing the bind itself
13pub struct Bind<'a, B: BindTarget> {
14    id: Id,
15    value: &'a mut B,
16}
17
18impl<'a, B: BindTarget> Bind<'a, B> {
19    /// Creates a new bind widget
20    pub fn new(id_source: impl Hash, value: &'a mut B) -> Self {
21        Self {
22            id: Id::new(id_source),
23            value,
24        }
25    }
26}
27
28impl<B: BindTarget> Widget for Bind<'_, B> {
29    fn ui(self, ui: &mut Ui) -> Response {
30        let id = ui.make_persistent_id(self.id);
31        let changing = ui.memory_mut(|mem| mem.data.get_temp(id).unwrap_or(false));
32
33        let size = ui.spacing().interact_size;
34
35        let (mut r, p) = ui.allocate_painter(size, Sense::click());
36        let vis = ui.style().interact_selectable(&r, changing);
37
38        p.rect_filled(r.rect, vis.corner_radius, vis.bg_fill);
39
40        p.text(
41            r.rect.center(),
42            Align2::CENTER_CENTER,
43            self.value.format(),
44            FontId::default(),
45            vis.fg_stroke.color,
46        );
47
48        if changing {
49            let key = ui.input(|i| {
50                i.events
51                    .iter()
52                    .find(|e| {
53                        matches!(
54                            e,
55                            Event::Key { pressed: true, .. }
56                                | Event::PointerButton { pressed: true, .. }
57                        )
58                    })
59                    .cloned()
60            });
61
62            let (reset, changed) = match key {
63                Some(Event::Key {
64                    key: Key::Escape, ..
65                }) if B::CLEARABLE => {
66                    self.value.clear();
67                    (true, true)
68                }
69                Some(Event::Key { key, modifiers, .. }) if B::IS_KEY => {
70                    self.value.set_key(key, modifiers);
71                    (true, true)
72                }
73                Some(Event::PointerButton {
74                    button, modifiers, ..
75                }) if B::IS_POINTER && button != PointerButton::Primary => {
76                    self.value.set_pointer(button, modifiers);
77                    (true, true)
78                }
79                _ if r.clicked_elsewhere() => (true, false),
80                _ => (false, false),
81            };
82
83            if reset {
84                ui.memory_mut(|mem| mem.data.insert_temp(id, false));
85            }
86
87            if changed {
88                r.mark_changed();
89            }
90        }
91
92        if r.clicked() {
93            ui.memory_mut(|mem| mem.data.insert_temp(id, true));
94        }
95
96        r
97    }
98}
99
100/// Shows bind popup when clicked with secondary pointer button.
101pub fn show_bind_popup(
102    ui: &mut Ui,
103    bind: &mut impl BindTarget,
104    popup_id_source: impl Hash,
105    widget_response: &Response,
106) -> bool {
107    let popup_id = Id::new(popup_id_source);
108
109    if widget_response.secondary_clicked() {
110        ui.memory_mut(|mem| mem.toggle_popup(popup_id))
111    }
112
113    let mut should_close = false;
114    let was_opened = ui.memory_mut(|mem| mem.is_popup_open(popup_id));
115
116    let mut styles = ui.ctx().style().as_ref().clone();
117    let saved_margin = styles.spacing.window_margin;
118
119    styles.spacing.window_margin = Margin::same(0);
120    ui.ctx().set_style(styles.clone());
121
122    let out = egui::popup_below_widget(
123        ui,
124        popup_id,
125        widget_response,
126        egui::PopupCloseBehavior::CloseOnClickOutside,
127        |ui| {
128            let r = ui.add(Bind::new(popup_id.with("_bind"), bind));
129
130            if r.changed() || ui.input(|i| i.key_down(Key::Escape)) {
131                ui.memory_mut(|mem| mem.close_popup());
132                should_close = true;
133            }
134
135            r.changed()
136        },
137    );
138
139    styles.spacing.window_margin = saved_margin;
140    ui.ctx().set_style(styles);
141
142    if !should_close && was_opened {
143        ui.memory_mut(|mem| mem.open_popup(popup_id));
144    }
145
146    out.unwrap_or(false)
147}
egui_bind/lib.rs

egui_bind/
lib.rs
