extern crate alloc;
#[cfg(feature = "std")]
use crate::app::{App, RendererFactory};
use crate::components::assets::IMG_THUMBS_UP;
use crate::components::{Image, WidgetTransform3D};
use crate::ecs::{Entity, World};
use crate::event::scroll::{ScrollAxis, ScrollConfig, ScrollOffset};
#[cfg(feature = "std")]
use crate::plugins::{FpsSummaryPlugin, StdInstantClockPlugin};
use crate::prelude::*;
#[cfg(feature = "std")]
use crate::surface::Surface;
use crate::types::Transform3D;
use crate::widget;
use crate::widget::dirty::Dirty;
pub const DEFAULT_VIEW: (u16, u16) = (640, 360);
const CARD_COUNT: i32 = 5;
pub struct CarouselCard {
pub index: usize,
}
pub struct Carousel;
pub struct CoverFlowBounds {
pub view_w: i32,
pub view_h: i32,
pub card_w: i32,
pub card_h: i32,
pub card_gap: i32,
pub perspective: i32,
}
impl CoverFlowBounds {
fn for_view(view_w: u16, view_h: u16) -> Self {
let vw = view_w as i32;
let vh = view_h as i32;
Self {
view_w: vw,
view_h: vh,
card_w: vw * 7 / 32,
card_h: vh / 2,
card_gap: vw / 8,
perspective: vw * 25 / 64,
}
}
}
#[mirui_macros::system]
pub fn layout_system(world: &mut World) {
let (view_w, view_h, card_w, card_h, card_gap, perspective) =
match world.resource::<CoverFlowBounds>() {
Some(b) => (
b.view_w,
b.view_h,
b.card_w,
b.card_h,
b.card_gap,
b.perspective,
),
None => return,
};
let mut carousels = alloc::vec::Vec::new();
world.query::<Carousel>().collect_into(&mut carousels);
let offset = match carousels
.first()
.and_then(|&e| world.get::<ScrollOffset>(e))
{
Some(s) => s.x,
None => return,
};
let carousel = carousels[0];
let mut cards = alloc::vec::Vec::new();
world.query::<CarouselCard>().collect_into(&mut cards);
if cards.is_empty() {
return;
}
let slot_stride = Fixed::from_int(card_w + card_gap);
let container_center = Fixed::from_int(view_w / 2);
let card_top = Fixed::from_int((view_h - card_h) / 2);
for e in cards {
let idx = match world.get::<CarouselCard>(e) {
Some(c) => c.index as i32,
None => continue,
};
let tx =
container_center + Fixed::from_int(idx) * slot_stride - Fixed::from_int(card_w / 2);
widget::set_position(world, e, tx, card_top);
let relative = Fixed::from_int(idx) - offset / slot_stride;
let tilt_y = Fixed::ZERO - relative * Fixed::from_int(45);
let tilt_x = relative.abs() * Fixed::from_int(20) - Fixed::from_int(15);
let distance = Fixed::from_int(perspective);
let ty3d = Transform3D::rotate_y_perspective(tilt_y, distance);
let tx3d = Transform3D::rotate_x_perspective(tilt_x, distance);
world.insert(e, WidgetTransform3D(ty3d.compose(&tx3d)));
world.insert(e, Dirty);
}
world.insert(carousel, Dirty);
}
pub fn build_widgets(world: &mut World, parent: Entity, view_w: u16, view_h: u16) {
let bounds = CoverFlowBounds::for_view(view_w, view_h);
let vw = bounds.view_w;
let vh = bounds.view_h;
let card_w = bounds.card_w;
let card_h = bounds.card_h;
let card_gap = bounds.card_gap;
let initial_offset = (vw + (card_w + card_gap) * (CARD_COUNT - 1) - vw) / 2 - card_w / 4;
world.insert_resource(bounds);
let card_colors = [
Color::rgb(255, 107, 107),
Color::rgb(255, 206, 84),
Color::rgb(136, 216, 176),
Color::rgb(118, 209, 244),
Color::rgb(178, 148, 255),
];
let card_colors_ref = &card_colors;
ui! {
:(
parent: parent
world: world
:)
View (
position: Position::Absolute,
left: 0,
top: 0,
width: vw,
height: vh
) [
Carousel,
ScrollOffset {
x: Fixed::from_int(initial_offset),
y: Fixed::ZERO,
},
ScrollConfig {
direction: ScrollAxis::Horizontal,
elastic: true,
content_width: Fixed::from_int(vw + (card_w + card_gap) * (CARD_COUNT - 1)),
content_height: Fixed::ZERO,
},
] {
walk card_colors_ref.iter().enumerate() with item {
View (
position: Position::Absolute,
left: 0,
top: 0,
width: card_w,
height: card_h,
bg_color: *item.1,
border_radius: 8,
border_color: Color::rgb(0, 0, 0),
border_width: 5
) [
CarouselCard { index: item.0 },
] {
if item.0 % 2 == 1 {
View (
position: Position::Absolute,
left: (card_w - 64) / 2,
top: (card_h - 64) / 2,
width: 64,
height: 64,
image: Image::new(&IMG_THUMBS_UP)
) {}
}
}
}
}
};
}
#[cfg(feature = "std")]
pub fn setup_app<B, F>(app: &mut App<B, F>, parent: Entity)
where
B: Surface,
F: RendererFactory<B>,
{
let info = app.backend.display_info();
app.add_system(layout_system::system())
.add_plugin(StdInstantClockPlugin)
.add_plugin(FpsSummaryPlugin::default());
build_widgets(&mut app.world, parent, info.width, info.height);
}
#[cfg(test)]
mod tests {
use super::*;
use crate::widget::Children;
use crate::widget::IdMap;
use crate::widget::builder::WidgetBuilder;
#[test]
fn build_widgets_smoke() {
let mut world = World::new();
world.insert_resource(IdMap::new());
let parent = WidgetBuilder::new(&mut world).id();
build_widgets(&mut world, parent, 640, 360);
assert!(
world
.get::<Children>(parent)
.is_some_and(|c| !c.0.is_empty()),
);
}
}