geng_ui/widgets/
button.rs

1use super::*;
2
3pub struct Button<'a> {
4    sense: &'a mut Sense,
5    clicked: bool,
6    inner: Box<dyn Widget + 'a>,
7    f: Option<Box<dyn FnMut() + 'a>>,
8}
9
10impl<'a> Button<'a> {
11    pub fn new(cx: &'a Controller, text: &str) -> Self {
12        let sense: &'a mut Sense = cx.get_state();
13        let text = Text::new(
14            text.to_owned(),
15            cx.theme().font.clone(),
16            cx.theme().text_size,
17            if sense.is_hovered() {
18                cx.theme().hover_color
19            } else {
20                cx.theme().usable_color
21            },
22        )
23        .shrink(if sense.is_captured() {
24            cx.theme().press_ratio as f64
25        } else {
26            0.0
27        });
28        let mut ui = stack![text];
29        if sense.is_hovered() {
30            ui.push(Box::new(
31                ColorBox::new(cx.theme().hover_color)
32                    .constraints_override(Constraints {
33                        min_size: vec2(0.0, 1.0),
34                        flex: vec2(1.0, 0.0),
35                    })
36                    .flex_align(vec2(Some(0.0), Some(0.0)), vec2(0.5, 0.0)),
37            ));
38        }
39        Self {
40            clicked: sense.take_clicked(),
41            sense,
42            inner: Box::new(ui),
43            f: None,
44        }
45    }
46    pub fn was_clicked(&self) -> bool {
47        self.clicked
48    }
49}
50
51impl Widget for Button<'_> {
52    fn sense(&mut self) -> Option<&mut Sense> {
53        Some(self.sense)
54    }
55    fn calc_constraints(&mut self, cx: &ConstraintsContext) -> Constraints {
56        cx.get_constraints(&self.inner)
57    }
58    fn walk_children_mut(&mut self, f: &mut dyn FnMut(&mut dyn Widget)) {
59        f(&mut self.inner);
60    }
61    fn layout_children(&mut self, cx: &mut LayoutContext) {
62        cx.set_position(&self.inner, cx.position);
63    }
64    fn handle_event(&mut self, event: &Event) {
65        #![allow(unused_variables)]
66        if let Some(f) = &mut self.f {
67            if self.sense.take_clicked() {
68                f();
69            }
70        }
71    }
72}
geng_ui/widgets/button.rs

geng_ui/widgets/
button.rs
