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
|
use crate::{Primitive, Renderer};
use iced_native::{scrollable, Background, MouseCursor, Rectangle, Vector};
const SCROLLBAR_WIDTH: u16 = 10;
const SCROLLBAR_MARGIN: u16 = 2;
impl scrollable::Renderer for Renderer {
fn scrollbar_bounds(bounds: Rectangle) -> Rectangle {
Rectangle {
x: bounds.x + bounds.width
- f32::from(SCROLLBAR_WIDTH + 2 * SCROLLBAR_MARGIN),
y: bounds.y,
width: f32::from(SCROLLBAR_WIDTH + 2 * SCROLLBAR_MARGIN),
height: bounds.height,
}
}
fn scroller_bounds(
bounds: Rectangle,
content_bounds: Rectangle,
scrollbar_bounds: Rectangle,
offset: u32,
) -> Rectangle {
let ratio = bounds.height / content_bounds.height;
let scrollbar_height = bounds.height * ratio;
let y_offset = offset as f32 * ratio;
Rectangle {
x: scrollbar_bounds.x + f32::from(SCROLLBAR_MARGIN),
y: scrollbar_bounds.y + y_offset,
width: scrollbar_bounds.width - f32::from(2 * SCROLLBAR_MARGIN),
height: scrollbar_height,
}
}
fn draw(
&mut self,
state: &scrollable::State,
bounds: Rectangle,
content_bounds: Rectangle,
is_mouse_over: bool,
is_mouse_over_scrollbar: bool,
scrollbar_bounds: Rectangle,
scroller_bounds: Rectangle,
offset: u32,
(content, mouse_cursor): Self::Output,
) -> Self::Output {
let is_content_overflowing = content_bounds.height > bounds.height;
let clip = Primitive::Clip {
bounds,
offset: Vector::new(0, offset),
content: Box::new(content),
};
(
if is_content_overflowing
&& (is_mouse_over || state.is_scroller_grabbed())
{
let scrollbar = Primitive::Quad {
bounds: scroller_bounds,
background: Background::Color([0.0, 0.0, 0.0, 0.7].into()),
border_radius: 5,
};
if is_mouse_over_scrollbar || state.is_scroller_grabbed() {
let scrollbar_background = Primitive::Quad {
bounds: Rectangle {
x: scrollbar_bounds.x + f32::from(SCROLLBAR_MARGIN),
width: scrollbar_bounds.width
- f32::from(2 * SCROLLBAR_MARGIN),
..scrollbar_bounds
},
background: Background::Color(
[0.0, 0.0, 0.0, 0.3].into(),
),
border_radius: 5,
};
Primitive::Group {
primitives: vec![clip, scrollbar_background, scrollbar],
}
} else {
Primitive::Group {
primitives: vec![clip, scrollbar],
}
}
} else {
clip
},
if is_mouse_over_scrollbar || state.is_scroller_grabbed() {
MouseCursor::Idle
} else {
mouse_cursor
},
)
}
}
|
