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use glium::glutin;
use glium::glutin::event::{Event, WindowEvent};
use glium::glutin::event_loop::{ControlFlow, EventLoop};
use glium::glutin::window::WindowBuilder;
use glium::{Display, Surface};
use imgui::{Context, FontConfig, FontGlyphRanges, FontSource, Ui};
use imgui_glium_renderer::Renderer;
use imgui_winit_support::{HiDpiMode, WinitPlatform};
use std::path::Path;
use std::time::Instant;
mod clipboard;
pub struct System {
pub event_loop: EventLoop<()>,
pub display: glium::Display,
pub imgui: Context,
pub platform: WinitPlatform,
pub renderer: Renderer,
pub font_size: f32,
}
pub fn init(title: &str) -> System {
let title = match Path::new(&title).file_name() {
Some(file_name) => file_name.to_str().unwrap(),
None => title,
};
let event_loop = EventLoop::new();
let context = glutin::ContextBuilder::new().with_vsync(true);
let builder = WindowBuilder::new()
.with_title(title.to_owned())
.with_inner_size(glutin::dpi::LogicalSize::new(1024f64, 768f64));
let display =
Display::new(builder, context, &event_loop).expect("Failed to initialize display");
let mut imgui = Context::create();
imgui.set_ini_filename(None);
if let Some(backend) = clipboard::init() {
imgui.set_clipboard_backend(Box::new(backend));
} else {
eprintln!("Failed to initialize clipboard");
}
let mut platform = WinitPlatform::init(&mut imgui);
{
let gl_window = display.gl_window();
let window = gl_window.window();
platform.attach_window(imgui.io_mut(), window, HiDpiMode::Rounded);
}
let hidpi_factor = platform.hidpi_factor();
let font_size = (15.0 * hidpi_factor) as f32;
imgui.fonts().add_font(&[
// FontSource::DefaultFontData {
// config: Some(FontConfig {
// size_pixels: font_size,
// ..FontConfig::default()
// }),
// },
FontSource::TtfData {
data: include_bytes!("../../res/Hack-Regular.ttf"),
size_pixels: font_size,
config: Some(FontConfig {
rasterizer_multiply: 1.75,
glyph_ranges: FontGlyphRanges::default(),
..FontConfig::default()
}),
},
]);
imgui.io_mut().font_global_scale = (1.0 / hidpi_factor) as f32;
let renderer = Renderer::init(&mut imgui, &display).expect("Failed to initialize renderer");
System {
event_loop,
display,
imgui,
platform,
renderer,
font_size,
}
}
impl System {
pub fn main_loop<F: FnMut(&mut bool, &mut Ui) + 'static>(self, mut run_ui: F) {
let System {
event_loop,
display,
mut imgui,
mut platform,
mut renderer,
..
} = self;
let mut last_frame = Instant::now();
event_loop.run(move |event, _, control_flow| match event {
Event::NewEvents(_) => {
let now = Instant::now();
imgui.io_mut().update_delta_time(now - last_frame);
last_frame = now;
}
Event::MainEventsCleared => {
let gl_window = display.gl_window();
platform
.prepare_frame(imgui.io_mut(), gl_window.window())
.expect("Failed to prepare frame");
gl_window.window().request_redraw();
}
Event::RedrawRequested(_) => {
let mut ui = imgui.frame();
let mut run = true;
run_ui(&mut run, &mut ui);
if !run {
*control_flow = ControlFlow::Exit;
}
let gl_window = display.gl_window();
let mut target = display.draw();
target.clear_color_srgb(0.7, 0.7, 0.7, 0.7);
platform.prepare_render(&ui, gl_window.window());
let draw_data = ui.render();
renderer
.render(&mut target, draw_data)
.expect("Rendering failed");
target.finish().expect("Failed to swap buffers");
}
Event::WindowEvent {
event: WindowEvent::CloseRequested,
..
} => *control_flow = ControlFlow::Exit,
event => {
let gl_window = display.gl_window();
platform.handle_event(imgui.io_mut(), gl_window.window(), &event);
}
})
}
}
|
