foxtrot 0.1.0

A 3D reference project and tech demo for the Bevy Engine.
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
142
143
144
145

//! Helper functions for creating common widgets.

use std::borrow::Cow;

use bevy::{
    ecs::{spawn::SpawnWith, system::IntoObserverSystem},
    prelude::*,
    ui::Val::*,
};

use crate::theme::{interaction::InteractionPalette, palette::*};

/// A root UI node that fills the window and centers its content.
pub(crate) fn ui_root(name: impl Into<Cow<'static, str>>) -> impl Bundle {
    (
        Name::new(name),
        Node {
            position_type: PositionType::Absolute,
            width: Percent(100.0),
            height: Percent(100.0),
            align_items: AlignItems::Center,
            justify_content: JustifyContent::Center,
            flex_direction: FlexDirection::Column,
            row_gap: Px(20.0),
            ..default()
        },
        BackgroundColor(SCREEN_BACKGROUND),
        // Don't block picking events for other UI roots.
        Pickable::IGNORE,
    )
}

/// A simple header label. Bigger than [`label`].
pub(crate) fn header(text: impl Into<String>) -> impl Bundle {
    (
        Name::new("Header"),
        Text(text.into()),
        TextFont::from_font_size(40.0),
        TextColor(HEADER_TEXT),
    )
}

/// A simple text label.
pub(crate) fn label(text: impl Into<String>) -> impl Bundle {
    label_base(text, 24.0)
}

pub(crate) fn label_small(text: impl Into<String>) -> impl Bundle {
    label_base(text, 12.0)
}

/// A simple text label.
fn label_base(text: impl Into<String>, font_size: f32) -> impl Bundle {
    (
        Name::new("Label"),
        Text(text.into()),
        TextFont::from_font_size(font_size),
        TextColor(LABEL_TEXT),
    )
}

/// A large rounded button with text and an action defined as an [`Observer`].
pub(crate) fn button<E, B, M, I>(text: impl Into<String>, action: I) -> impl Bundle
where
    E: Event,
    B: Bundle,
    I: IntoObserverSystem<E, B, M>,
{
    button_base(
        text,
        action,
        (
            Node {
                width: Px(300.0),
                height: Px(80.0),
                align_items: AlignItems::Center,
                justify_content: JustifyContent::Center,
                ..default()
            },
            BorderRadius::MAX,
        ),
    )
}

/// A small square button with text and an action defined as an [`Observer`].
pub(crate) fn button_small<E, B, M, I>(text: impl Into<String>, action: I) -> impl Bundle
where
    E: Event,
    B: Bundle,
    I: IntoObserverSystem<E, B, M>,
{
    button_base(
        text,
        action,
        Node {
            width: Px(30.0),
            height: Px(30.0),
            align_items: AlignItems::Center,
            justify_content: JustifyContent::Center,
            ..default()
        },
    )
}

/// A simple button with text and an action defined as an [`Observer`]. The button's layout is provided by `button_bundle`.
fn button_base<E, B, M, I>(
    text: impl Into<String>,
    action: I,
    button_bundle: impl Bundle,
) -> impl Bundle
where
    E: Event,
    B: Bundle,
    I: IntoObserverSystem<E, B, M>,
{
    let text = text.into();
    let action = IntoObserverSystem::into_system(action);
    (
        Name::new("Button"),
        Node::default(),
        Children::spawn(SpawnWith(|parent: &mut ChildSpawner| {
            parent
                .spawn((
                    Name::new("Button Inner"),
                    Button,
                    BackgroundColor(BUTTON_BACKGROUND),
                    InteractionPalette {
                        none: BUTTON_BACKGROUND,
                        hovered: BUTTON_HOVERED_BACKGROUND,
                        pressed: BUTTON_PRESSED_BACKGROUND,
                    },
                    children![(
                        Name::new("Button Text"),
                        Text(text),
                        TextFont::from_font_size(40.0),
                        TextColor(BUTTON_TEXT),
                        // Don't bubble picking events from the text up to the button.
                        Pickable::IGNORE,
                    )],
                ))
                .insert(button_bundle)
                .observe(action);
        })),
    )
}