From 63eb8682d2b85536c2dda812790d39bfd1162d24 Mon Sep 17 00:00:00 2001
From: griffi-gh <prasol258@gmail.com>
Date: Sun, 29 Jan 2023 02:15:12 +0100
Subject: [PATCH] exit on esc and cursor lock

---
 src/control_flow.rs | 21 +++++++++++++++++++++
 src/cursor_lock.rs  |  8 +++++++-
 src/main.rs         | 20 ++++++++++++++------
 3 files changed, 42 insertions(+), 7 deletions(-)
 create mode 100644 src/control_flow.rs

diff --git a/src/control_flow.rs b/src/control_flow.rs
new file mode 100644
index 0000000..253dbdb
--- /dev/null
+++ b/src/control_flow.rs
@@ -0,0 +1,21 @@
+use shipyard::{UniqueView, UniqueViewMut, Unique, AllStoragesView};
+use glium::glutin::{event::VirtualKeyCode, event_loop::ControlFlow};
+use crate::input::RawInputState;
+
+#[derive(Unique)]
+pub struct SetControlFlow(pub Option<ControlFlow>);
+
+pub fn exit_on_esc(
+  raw_inputs: UniqueView<RawInputState>,
+  mut control_flow: UniqueViewMut<SetControlFlow>
+) {
+  if raw_inputs.keyboard_state.contains(&VirtualKeyCode::Escape) {
+    control_flow.0 = Some(ControlFlow::Exit);
+  }
+}
+
+pub fn insert_control_flow_unique(
+  storages: AllStoragesView
+) {
+  storages.add_unique(SetControlFlow(None))
+}
diff --git a/src/cursor_lock.rs b/src/cursor_lock.rs
index 200d9e8..2c3303b 100644
--- a/src/cursor_lock.rs
+++ b/src/cursor_lock.rs
@@ -1,4 +1,4 @@
-use shipyard::{AllStoragesView, Unique, NonSendSync, UniqueView};
+use shipyard::{AllStoragesView, Unique, NonSendSync, UniqueView, UniqueViewMut};
 use crate::rendering::Renderer;
 use glium::glutin::window::CursorGrabMode;
 
@@ -26,3 +26,9 @@ pub fn insert_lock_state(
 ) {
   storages.add_unique(CursorLock(false))
 }
+
+pub fn lock_cursor_now(
+  mut lock: UniqueViewMut<CursorLock>
+) {
+  lock.0 = true
+}
diff --git a/src/main.rs b/src/main.rs
index a962b05..0dff5a4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -27,6 +27,7 @@ pub(crate) mod fly_controller;
 pub(crate) mod block_placement;
 pub(crate) mod delta_time;
 pub(crate) mod cursor_lock;
+pub(crate) mod control_flow;
 
 use rendering::{
   Renderer, 
@@ -52,7 +53,8 @@ use rendering::{
 };
 use block_placement::block_placement_system;
 use delta_time::{DeltaTime, init_delta_time};
-use cursor_lock::{insert_lock_state, update_cursor_lock_state};
+use cursor_lock::{insert_lock_state, update_cursor_lock_state, lock_cursor_now};
+use control_flow::{exit_on_esc, insert_control_flow_unique, SetControlFlow};
 
 fn startup() -> Workload {
   (
@@ -60,9 +62,11 @@ fn startup() -> Workload {
     load_prefabs,
     init_selection_box_buffers,
     insert_lock_state,
+    lock_cursor_now,
     init_input,
     init_game_world,
     spawn_player,
+    insert_control_flow_unique,
     init_delta_time,
   ).into_workload()
 }
@@ -74,7 +78,8 @@ fn update() -> Workload {
     update_raycasts,
     block_placement_system,
     update_cursor_lock_state,
-    compute_cameras
+    compute_cameras,
+    exit_on_esc,
   ).into_workload()
 }
 fn render() -> Workload {
@@ -117,11 +122,9 @@ fn main() {
   event_loop.run(move |event, _, control_flow| {
     *control_flow = ControlFlow::Poll;
     process_glutin_events(&mut world, &event);
+    #[allow(clippy::collapsible_match, clippy::single_match)]
     match event {
       Event::WindowEvent { event, .. } => match event {
-        WindowEvent::Resized(_size) => {
-          // todo ...
-        }
         WindowEvent::CloseRequested => {
           log::info!("exit requested");
           *control_flow = ControlFlow::Exit;
@@ -154,8 +157,13 @@ fn main() {
         let target = world.remove_unique::<RenderTarget>().unwrap(); 
         target.0.finish().unwrap();
 
-        //FrameEnd
+        //After frame end
         world.run_workload(after_frame_end).unwrap();
+
+        //Process control flow changes
+        if let Some(flow) = world.borrow::<UniqueView<SetControlFlow>>().unwrap().0 {
+          *control_flow = flow;
+        }
       },
       _ => (),
     };