1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
use {Color, Colorable, Dimensions, Point, Positionable, Scalar, Sizeable, Widget};
use std;
use super::primitive::shape::Style;
use widget;
#[derive(Copy, Clone, Debug, WidgetCommon_)]
pub struct RoundedRectangle {
#[conrod(common_builder)]
pub common: widget::CommonBuilder,
pub style: Style,
pub radius: Scalar,
pub corner_resolution: usize,
}
widget_ids! {
struct Ids { polygon }
}
pub const DEFAULT_CORNER_RESOLUTION: usize = 12;
pub struct State {
ids: Ids,
}
impl RoundedRectangle {
pub fn styled(dim: Dimensions, radius: Scalar, style: Style) -> Self {
RoundedRectangle {
common: widget::CommonBuilder::default(),
style: style,
radius: radius,
corner_resolution: DEFAULT_CORNER_RESOLUTION,
}.wh(dim)
}
pub fn fill(dim: Dimensions, radius: Scalar) -> Self {
RoundedRectangle::styled(dim, radius, Style::fill())
}
pub fn fill_with(dim: Dimensions, radius: Scalar, color: Color) -> Self {
RoundedRectangle::styled(dim, radius, Style::fill_with(color))
}
pub fn outline(dim: Dimensions, radius: Scalar) -> Self {
RoundedRectangle::styled(dim, radius, Style::outline())
}
pub fn outline_styled(dim: Dimensions, radius: Scalar, line_style: widget::line::Style) -> Self {
RoundedRectangle::styled(dim, radius, Style::outline_styled(line_style))
}
pub fn corner_resolution(mut self, res: usize) -> Self {
self.corner_resolution = res;
self
}
}
impl Widget for RoundedRectangle {
type State = State;
type Style = Style;
type Event = ();
fn init_state(&self, id_gen: widget::id::Generator) -> Self::State {
State {
ids: Ids::new(id_gen),
}
}
fn style(&self) -> Self::Style {
self.style.clone()
}
fn update(self, args: widget::UpdateArgs<Self>) -> Self::Event {
let widget::UpdateArgs { id, state, style, rect, ui, .. } = args;
let RoundedRectangle { radius, corner_resolution, .. } = self;
let (l, r, b, t) = rect.l_r_b_t();
let (in_l, in_r, in_b, in_t) = (l + radius, r - radius, b + radius, t - radius);
let circle_resolution = corner_resolution * 4;
let t = 2.0 * std::f64::consts::PI / circle_resolution as Scalar;
fn f(r: Scalar, i: Scalar, t: Scalar) -> Point {
[r * (t*i).cos(), r * (t*i).sin()]
}
const NUM_CORNERS: usize = 4;
let points = (0..NUM_CORNERS).flat_map(move |corner| {
let (in_x, in_y, step) = match corner {
0 => (in_r, in_t, 0),
1 => (in_l, in_t, corner_resolution),
2 => (in_l, in_b, corner_resolution + corner_resolution),
3 => (in_r, in_b, corner_resolution + corner_resolution + corner_resolution),
_ => unreachable!(),
};
(0..corner_resolution+1).map(move |res| {
let i = step + res;
let circle_offset = f(radius, i as f64, t);
[in_x + circle_offset[0], in_y + circle_offset[1]]
})
});
let (x, y, w, h) = rect.x_y_w_h();
widget::Polygon::styled(points, *style)
.x_y(x, y)
.w_h(w, h)
.parent(id)
.graphics_for(id)
.set(state.ids.polygon, ui);
}
}
impl Colorable for RoundedRectangle {
fn color(mut self, color: Color) -> Self {
self.style.set_color(color);
self
}
}