bevy_nested_tooltips 0.2.2

Nested Tooltips for the bevy game engine
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
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

//! Highlighting logic and components are stored here.
//! What highlighting actually does is up to the user.

use bevy_app::{Plugin, PreStartup};
use bevy_ecs::{
    component::Component,
    entity::Entity,
    lifecycle::HookContext,
    observer::On,
    query::{QueryData, With},
    system::{Commands, Query},
    world::World,
};
use tiny_bail::prelude::*;

use crate::{
    events::TooltipHighlighting,
    text_observer::{TextHoveredOut, TextHoveredOver},
};

pub(crate) struct HighlightPlugin;

impl Plugin for HighlightPlugin {
    fn build(&self, app: &mut bevy_app::App) {
        app.add_systems(PreStartup, setup_component_hooks);
    }
}

/// Inserts [`TooltipHighlighting`] onto entities that has a component [`TooltipHighlight`] with the same string key
#[derive(Debug, Component)]
pub struct TooltipHighlightLink(pub String);

/// When a [`TooltipHighlightLink`] has been activated and shares the same string with this component
/// [`TooltipHighlighting`] will be added to this entity
#[derive(Debug, Component)]
pub struct TooltipHighlight(pub String);

/// Highlight specific component hooks
fn setup_component_hooks(world: &mut World) {
    world
        .register_component_hooks::<TooltipHighlightLink>()
        .on_insert(|mut world, HookContext { entity, .. }| {
            r!(world.commands().get_entity(entity))
                .observe(highlight_activate)
                .observe(highlight_deactivate);
        });
}

#[derive(QueryData)]
struct HighlightNodesQuery {
    entity: Entity,
    tooltip_highlight: &'static TooltipHighlight,
}

/// When text that highlights a node is moused over this will add marker components
/// to the user so they can then apply highlighting logic
fn highlight_activate(
    hover: On<TextHoveredOver>,
    highlight_nodes_link_query: Query<&TooltipHighlightLink>,
    highlight_nodes_query: Query<HighlightNodesQuery>,
    mut commands: Commands,
) {
    let link = r!(highlight_nodes_link_query.get(hover.entity)).0.clone();

    for node in highlight_nodes_query
        .iter()
        .filter(|x| x.tooltip_highlight.0 == link)
    {
        c!(commands.get_entity(node.entity)).insert(TooltipHighlighting);
    }
}

/// When text that highlights a node is no longer moused over this will remove marker components
/// the user can then remove highlighting logic
fn highlight_deactivate(
    hover: On<TextHoveredOut>,
    highlight_nodes_link_query: Query<&TooltipHighlightLink>,
    highlight_nodes_query: Query<HighlightNodesQuery, With<TooltipHighlighting>>,
    mut commands: Commands,
) {
    let link = r!(highlight_nodes_link_query.get(hover.entity)).0.clone();

    for node in highlight_nodes_query
        .iter()
        .filter(|x| x.tooltip_highlight.0 == link)
    {
        c!(commands.get_entity(node.entity)).remove::<TooltipHighlighting>();
    }
}