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/*
* Copyright (C) Oscar Shrimpton 2020
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
use crate::Renderer;
use legion::systems::Runnable;
use stockton_input::{Action as KBAction, InputManager};
use winit::event::{ElementState, Event as WinitEvent, WindowEvent as WinitWindowEvent};
use winit::event_loop::ControlFlow;
#[derive(Debug, Clone, Copy)]
pub enum WindowEvent {
SizeChanged,
CloseRequested,
KeyboardAction(KBAction),
}
impl WindowEvent {
pub fn from(winit_event: &WinitEvent<()>) -> Option<WindowEvent> {
// TODO
match winit_event {
WinitEvent::WindowEvent { event, .. } => match event {
WinitWindowEvent::CloseRequested => Some(WindowEvent::CloseRequested),
WinitWindowEvent::Resized(_) => Some(WindowEvent::SizeChanged),
WinitWindowEvent::KeyboardInput { input, .. } => match input.state {
ElementState::Pressed => Some(WindowEvent::KeyboardAction(KBAction::KeyPress(
input.scancode,
))),
ElementState::Released => Some(WindowEvent::KeyboardAction(
KBAction::KeyRelease(input.scancode),
)),
},
_ => None,
},
_ => None,
}
}
}
#[system]
/// A system to process the window events sent to renderer by the winit event loop.
pub fn _process_window_events<T: 'static + InputManager>(
#[resource] renderer: &mut Renderer<'static>,
#[resource] manager: &mut T,
#[state] actions_buf: &mut Vec<KBAction>,
) {
let mut actions_buf_cursor = 0;
while let Ok(event) = renderer.window_events.try_recv() {
match event {
WindowEvent::SizeChanged => renderer.resize(),
WindowEvent::CloseRequested => {
let mut flow = renderer.update_control_flow.write().unwrap();
// TODO: Let everything know this is our last frame
*flow = ControlFlow::Exit;
}
WindowEvent::KeyboardAction(action) => {
if actions_buf_cursor >= actions_buf.len() {
actions_buf.push(action);
} else {
actions_buf[actions_buf_cursor] = action;
}
actions_buf_cursor += 1;
}
};
}
manager.handle_frame(&actions_buf[0..actions_buf_cursor]);
}
pub fn process_window_events_system<T: 'static + InputManager>() -> impl Runnable {
_process_window_events_system::<T>(Vec::with_capacity(4))
}
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