extern crate alloc;
use crate::prelude::*;
use crate::ui::widgets::ProgressBar;
pub fn build_widgets(world: &mut World, parent: Entity) {
let shown = Signal::new(false);
let toggle = shown.clone();
let cond = shown.clone();
let mode = Signal::new(0u8);
let cycle = mode.clone();
let sel = mode.clone();
ui! {
:(
parent: parent
world: world
:)
Column (
grow: 1.0,
align: AlignItems::Center,
justify: JustifyContent::Center,
padding: Padding::all(16)
) {
View (
bg_color: Color::rgb(88, 166, 255),
width: 160,
height: 40,
border_radius: 8,
text: "toggle panel"
) on Tap {
toggle.update(|v| *v = !*v);
}
if $cond {
View (
bg_color: Color::rgb(63, 185, 80),
width: 200,
height: 60,
border_radius: 8,
text: "now you see me"
)
} else {
View (
bg_color: Color::rgb(80, 80, 96),
width: 200,
height: 60,
border_radius: 8,
text: "hidden — tap to show"
)
}
View (
bg_color: Color::rgb(210, 168, 80),
width: 160,
height: 40,
border_radius: 8,
text: "cycle mode"
) on Tap {
cycle.update(|m| *m = (*m + 1) % 3);
}
match $sel {
0 => {
View (
width: 220,
height: 60,
border_radius: 8,
bg_color: Color::rgb(88, 166, 255),
text: "single card"
)
}
1 => {
Row (
width: 220,
height: 60,
justify: JustifyContent::SpaceBetween,
align: AlignItems::Center
) {
View (
width: 60,
height: 60,
border_radius: 8,
bg_color: Color::rgb(220, 80, 80)
)
View (
width: 60,
height: 60,
border_radius: 8,
bg_color: Color::rgb(63, 185, 80)
)
View (
width: 60,
height: 60,
border_radius: 8,
bg_color: Color::rgb(88, 166, 255)
)
}
}
_ => {
Column (
width: 220,
align: AlignItems::Stretch,
padding: Padding::all(8)
) {
View (height: 24, text: "stacked bars")
ProgressBar (height: 12, border_radius: 6, value: 0.3)
ProgressBar (height: 12, border_radius: 6, value: 0.7)
}
}
}
}
};
}
#[cfg(feature = "std")]
pub fn setup_app<B, F>(app: &mut App<B, F>, parent: Entity)
where
B: Surface,
F: RendererFactory<B>,
{
use crate::app::plugins::StdInstantClockPlugin;
app.add_plugin(StdInstantClockPlugin);
build_widgets(&mut app.world, parent);
}
#[cfg(test)]
mod tests {
use super::*;
use crate::core::reactive::flush_signal_dirty;
use crate::input::event::GestureHandler;
use crate::input::event::gesture::GestureEvent;
use crate::ui::Children;
use crate::ui::IdMap;
#[test]
fn reactive_if_else_swaps_branch() {
use crate::ui::widgets::text::Text;
let mut world = World::new();
world.insert_resource(IdMap::new());
let parent = WidgetBuilder::new(&mut world).id();
build_widgets(&mut world, parent);
let col = world.get::<Children>(parent).unwrap().0[0];
let branch_text = |w: &World| {
let branch = w.get::<Children>(col).unwrap().0[2];
alloc::string::String::from_utf8(w.get::<Text>(branch).unwrap().0.clone()).unwrap()
};
assert_eq!(branch_text(&world), "hidden — tap to show");
let btn = world.get::<Children>(col).unwrap().0[0];
let tap = GestureEvent::Tap {
x: Fixed::ZERO,
y: Fixed::ZERO,
target: btn,
};
GestureHandler::trigger(&mut world, btn, &tap);
flush_signal_dirty(&mut world);
assert_eq!(branch_text(&world), "now you see me", "if branch mounted");
GestureHandler::trigger(&mut world, btn, &tap);
flush_signal_dirty(&mut world);
assert_eq!(
branch_text(&world),
"hidden — tap to show",
"else branch mounted"
);
}
fn build_match_widgets(world: &mut World, parent: Entity) -> Signal<u8> {
let mode = Signal::new(0u8);
let m = mode.clone();
ui! {
:(
parent: parent
world: world
:)
Column (grow: 1.0) {
match $m {
0 => {
View (text: "zero", height: 30)
}
_ => {
View (text: "other", height: 30)
}
}
}
};
mode
}
#[test]
fn reactive_match_swaps_arm() {
use crate::ui::widgets::text::Text;
let mut world = World::new();
world.insert_resource(IdMap::new());
let parent = WidgetBuilder::new(&mut world).id();
let mode = build_match_widgets(&mut world, parent);
let col = world.get::<Children>(parent).unwrap().0[0];
let arm_text = |w: &World| {
let arm = w.get::<Children>(col).unwrap().0[0];
alloc::string::String::from_utf8(w.get::<Text>(arm).unwrap().0.clone()).unwrap()
};
assert_eq!(arm_text(&world), "zero");
mode.set(5);
flush_signal_dirty(&mut world);
assert_eq!(
arm_text(&world),
"other",
"arm switched on scrutinee change"
);
}
fn build_sandwich(world: &mut World, parent: Entity) -> Signal<bool> {
let flag = Signal::new(false);
let f = flag.clone();
ui! {
:(
parent: parent
world: world
:)
Column (grow: 1.0) {
View (text: "top", height: 20)
if $f {
View (text: "on", height: 20)
} else {
View (text: "off", height: 20)
}
View (text: "bottom", height: 20)
}
};
flag
}
#[test]
fn reactive_branch_keeps_index_between_static_siblings() {
use crate::ui::widgets::text::Text;
let mut world = World::new();
world.insert_resource(IdMap::new());
let parent = WidgetBuilder::new(&mut world).id();
let flag = build_sandwich(&mut world, parent);
let col = world.get::<Children>(parent).unwrap().0[0];
let text_at = |w: &World, i: usize| {
let e = w.get::<Children>(col).unwrap().0[i];
alloc::string::String::from_utf8(w.get::<Text>(e).unwrap().0.clone()).unwrap()
};
assert_eq!(text_at(&world, 0), "top");
assert_eq!(text_at(&world, 1), "bottom");
assert_eq!(text_at(&world, 2), "off");
flag.set(true);
flush_signal_dirty(&mut world);
assert_eq!(text_at(&world, 0), "top");
assert_eq!(text_at(&world, 1), "bottom");
assert_eq!(
text_at(&world, 2),
"on",
"branch swapped in place, no reorder"
);
}
}