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pub extern crate find_folder;
pub extern crate glium;
pub extern crate rand;
use event::LoopEvent;
use glium::glutin;
use std::cell::RefCell;
use std::time::Instant;
pub use app::{App, LoopMode};
pub use glium::glutin::{ContextBuilder, CursorState, ElementState, MonitorId, MouseCursor,
WindowBuilder, WindowEvent, VirtualKeyCode};
pub use self::event::Event;
pub use self::frame::Frame;
pub use self::ui::Ui;
pub mod app;
pub mod audio;
pub mod color;
pub mod event;
mod frame;
pub mod window;
pub mod image;
pub mod math;
pub mod osc;
pub mod prelude;
pub mod ui;
pub type ModelFn<Model> = fn(&App) -> Model;
pub type UpdateFn<Model, Event> = fn(&App, Model, Event) -> Model;
pub type DrawFn<Model> = fn(&App, &Model, Frame) -> Frame;
pub type ExitFn<Model> = fn(&App, Model);
pub fn app<M, E>(model: ModelFn<M>, update: UpdateFn<M, E>, draw: DrawFn<M>) -> Builder<M, E>
where E: LoopEvent,
{
let exit = None;
Builder { model, update, draw, exit }
}
pub struct Builder<M, E> {
model: ModelFn<M>,
update: UpdateFn<M, E>,
draw: DrawFn<M>,
exit: Option<ExitFn<M>>,
}
impl<M, E> Builder<M, E>
where E: LoopEvent,
{
pub fn exit(mut self, exit: ExitFn<M>) -> Self {
self.exit = Some(exit);
self
}
pub fn run(self) {
let Builder { model, update, draw, exit } = self;
let events_loop = glutin::EventsLoop::new();
let app = App::new(events_loop);
let model = model(&app);
run_loop(app, model, update, draw, exit)
}
}
pub fn run<M, E>(model: ModelFn<M>, update: UpdateFn<M, E>, draw: DrawFn<M>)
where E: LoopEvent,
{
app(model, update, draw).run()
}
fn run_loop<M, E>(
mut app: App,
mut model: M,
update_fn: UpdateFn<M, E>,
draw_fn: DrawFn<M>,
exit_fn: Option<ExitFn<M>>,
)
where
E: LoopEvent,
{
fn draw<M>(app: &App, model: &M, draw_fn: DrawFn<M>) -> Result<(), glium::SwapBuffersError> {
let gl_frames = app.windows
.borrow()
.iter()
.map(|(&id, window)| {
let gl_frame = RefCell::new(frame::GlFrame::new(window.display.draw()));
(id, gl_frame)
})
.collect();
let frame = draw_fn(&app, &model, frame::new(gl_frames));
frame::finish(frame)
}
fn update_event(loop_start: Instant, last_update: &mut Instant) -> event::Update {
let now = Instant::now();
let since_last = now.duration_since(*last_update);
let since_start = now.duration_since(loop_start);
let update = event::Update { since_last, since_start };
*last_update = now;
update
};
fn process_and_emit_glutin_event<M, E>(
app: &App,
mut model: M,
update_fn: UpdateFn<M, E>,
glutin_event: glutin::Event,
) -> (M, bool)
where
E: LoopEvent,
{
let mut exit_on_escape = false;
if let glutin::Event::WindowEvent { window_id, ref event } = glutin_event {
if app.exit_on_escape.get() {
if let glutin::WindowEvent::KeyboardInput { input, .. } = *event {
if let Some(VirtualKeyCode::Escape) = input.virtual_keycode {
exit_on_escape = true;
}
}
}
if let glutin::WindowEvent::Closed = *event {
app.windows.borrow_mut().remove(&window_id);
} else {
if let Some(window) = app.windows.borrow().get(&window_id) {
if let Some(input) = ui::glutin_window_event_to_input(event.clone(), window) {
if let Some(handles) = app.ui.windows.borrow().get(&window_id) {
for handle in handles {
if let Some(ref tx) = handle.input_tx {
tx.try_send(input.clone()).ok();
}
}
}
}
}
}
}
if let Some(event) = E::from_glutin_event(glutin_event, app) {
model = update_fn(&app, model, event);
}
let exit = if exit_on_escape || app.windows.borrow().is_empty() {
true
} else {
false
};
(model, exit)
}
let loop_start = Instant::now();
let mut glutin_events = Vec::new();
let mut last_update = loop_start;
let mut last_loop_end = loop_start;
let mut updates_remaining = LoopMode::DEFAULT_UPDATES_FOLLOWING_EVENT;
let mut loop_mode = None;
'main: loop {
let new_loop_mode = app.loop_mode();
let loop_mode_has_changed = loop_mode != Some(new_loop_mode);
loop_mode = Some(new_loop_mode);
match loop_mode {
Some(LoopMode::Rate { update_interval }) => {
if loop_mode_has_changed {
}
app.events_loop.poll_events(|event| glutin_events.push(event));
for glutin_event in glutin_events.drain(..) {
let (new_model, exit) = process_and_emit_glutin_event(&app, model, update_fn, glutin_event);
model = new_model;
if exit {
break 'main;
}
}
let event = E::from(update_event(loop_start, &mut last_update));
model = update_fn(&app, model, event);
draw(&app, &model, draw_fn).unwrap();
let now = Instant::now();
let since_last_loop_end = now.duration_since(last_loop_end);
if since_last_loop_end < update_interval {
std::thread::sleep(update_interval - since_last_loop_end);
}
last_loop_end = Instant::now();
},
Some(LoopMode::Wait { updates_following_event, update_interval }) => {
if loop_mode_has_changed {
updates_remaining = updates_following_event;
}
app.events_loop.poll_events(|event| glutin_events.push(event));
if glutin_events.is_empty() && updates_remaining == 0 {
app.events_loop.run_forever(|event| {
glutin_events.push(event);
glium::glutin::ControlFlow::Break
});
}
if !glutin_events.is_empty() {
updates_remaining = updates_following_event;
}
for glutin_event in glutin_events.drain(..) {
let (new_model, exit) = process_and_emit_glutin_event(&app, model, update_fn, glutin_event);
model = new_model;
if exit {
break 'main;
}
}
let event = E::from(update_event(loop_start, &mut last_update));
model = update_fn(&app, model, event);
updates_remaining -= 1;
draw(&app, &model, draw_fn).unwrap();
let now = Instant::now();
let since_last_loop_end = now.duration_since(last_loop_end);
if since_last_loop_end < update_interval {
std::thread::sleep(update_interval - since_last_loop_end);
}
last_loop_end = Instant::now();
},
None => unreachable!(),
}
}
if let Some(exit_fn) = exit_fn {
exit_fn(&app, model);
}
}