agape_layout 0.2.0

Layout engine for agape
Documentation 
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

use agape_layout::{AxisAlignment, BoxSizing, EmptyLayout, LayoutSolver, Size, VerticalLayout};

#[test]
fn scrolling() {
    let mut child = EmptyLayout::new();
    child.intrinsic_size.height = BoxSizing::Fixed(200.0);
    let children = vec![
        child.clone(),
        child.clone(),
        child.clone(),
        child.clone(),
        child.clone(),
        child,
    ];

    let scroll_offset = 100.0;
    let mut root = VerticalLayout::new();
    root.intrinsic_size.height = BoxSizing::Fixed(200.0);
    root.scroll(scroll_offset);
    root.add_children(children);

    let window = Size::unit(400.0);

    LayoutSolver::solve(&mut root, window);
    assert_eq!(root.children[0].position().y, scroll_offset);
}

#[test]
fn dont_scroll_if_no_overflow() {
    let children = vec![
        EmptyLayout::new(),
        EmptyLayout::new(),
        EmptyLayout::new(),
        EmptyLayout::new(),
        EmptyLayout::new(),
    ];

    let mut layout = VerticalLayout::new();
    layout.add_children(children);
    layout.scroll(12.0);

    let window = Size::new(400.0, 400.0);

    LayoutSolver::solve(&mut layout, window);
    assert_eq!(layout.children[0].position().y, 0.0);

    layout.main_axis_alignment = AxisAlignment::Center;
    LayoutSolver::solve(&mut layout, window);
    assert_eq!(layout.children[0].position().y, 0.0);

    layout.main_axis_alignment = AxisAlignment::End;
    LayoutSolver::solve(&mut layout, window);
    assert_eq!(layout.children[0].position().y, 0.0);
}