hUI/hui-examples/boilerplate.rs
2024-09-08 12:13:44 +02:00

85 lines
2.4 KiB
Rust

use glam::{UVec2, Vec2};
use glium::{Surface, backend::glutin::SimpleWindowBuilder};
use winit::{
event::{Event, WindowEvent},
event_loop::{EventLoopBuilder, ControlFlow}
};
use hui::UiInstance;
use hui_glium::GliumUiRenderer;
/// Generates a `main` function that initializes glium renderer, `UiInstance`, and runs the event loop.
macro_rules! ui_main {
($name:literal, init: $closure0:expr, run: $closure1:expr) => {
fn main() {
$crate::boilerplate::ui($closure0, $closure1, $name);
}
};
(init: $closure0:expr, run: $closure1:expr) => {
fn main() {
$crate::boilerplate::ui($closure0, $closure1, "hUI example");
}
};
($closure: expr) => {
fn main() {
$crate::boilerplate::ui(|_|(), $closure, "hUI example");
}
};
}
/// Initializes glium renderer, `UiInstance`, and runs the event loop.
pub fn ui<T>(
mut init: impl FnMut(&mut UiInstance) -> T,
mut draw: impl FnMut(&mut UiInstance, Vec2, &mut T),
name: &'static str
) {
kubi_logging::init();
let event_loop = EventLoopBuilder::new().build().unwrap();
let (window, display) = SimpleWindowBuilder::new()
.with_title(name)
.build(&event_loop);
let mut hui = UiInstance::new();
let mut backend = GliumUiRenderer::new(&display);
let mut result = init(&mut hui);
event_loop.run(|event, window_target| {
window.request_redraw();
window_target.set_control_flow(ControlFlow::Poll);
hui_winit::handle_winit_event(&mut hui, &event);
match event {
Event::WindowEvent { event, .. } => match event {
WindowEvent::CloseRequested => {
window_target.exit();
},
WindowEvent::Resized(size) => {
display.resize((size.width, size.height));
},
WindowEvent::RedrawRequested => {
let mut frame = display.draw();
frame.clear_color_srgb(0.5, 0.5, 0.5, 1.);
hui.begin();
let size = UVec2::from(display.get_framebuffer_dimensions()).as_vec2();
draw(&mut hui, size, &mut result);
hui.end();
backend.update(&hui);
backend.draw(&mut frame, size);
frame.finish().unwrap();
},
_ => (),
},
Event::Suspended => {
#[cfg(target_os = "android")]
window_target.exit();
},
_ => (),
}
}).unwrap();
}