tasks initial impl (still working on task_on trait method)

Cargo.lock

@@ -1047,6 +1047,7 @@ dependencies = [
  "iris-core",
  "iris-macro",
  "pollster",
+ "tokio",
  "unicode-segmentation",
  "wgpu",
  "winit",
@@ -2575,6 +2576,15 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
+[[package]]
+name = "tokio"
+version = "1.49.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72a2903cd7736441aac9df9d7688bd0ce48edccaadf181c3b90be801e81d3d86"
+dependencies = [
+ "pin-project-lite",
+]
+
 [[package]]
 name = "toml"
 version = "0.8.23"

Cargo.toml

@@ -1,6 +1,5 @@
 [package]
 name = "iris"
-default-run = "test"
 version.workspace = true
 edition.workspace = true
 
@@ -16,6 +15,10 @@ arboard = { workspace = true, features = ["wayland-data-control"] }
 pollster = { workspace = true }
 wgpu = { workspace = true }
 image = { workspace = true }
+tokio = { workspace = true, features = ["sync", "rt", "rt-multi-thread"] }
+
+[dev-dependencies]
+tokio = { workspace = true, features = ["sync", "rt", "rt-multi-thread", "time"] }
 
 [workspace]
 members = ["core", "macro"]
@@ -36,3 +39,4 @@ fxhash = "0.2.1"
 arboard = "3.6.1"
 iris-core = { path = "core" }
 iris-macro = { path = "macro" }
+tokio = "1.49.0"

core/src/event/rsc.rs

@@ -2,9 +2,11 @@ use crate::{
     Event, EventCtx, EventLike, EventManager, HasUi, IdLike, Widget, WidgetEventFn, WidgetRef,
 };
 
-pub trait HasEvents: Sized + HasUi + 'static {
+pub trait HasState: 'static {
     type State;
+}
 
+pub trait HasEvents: Sized + HasUi + HasState {
     fn events(&self) -> &EventManager<Self>;
     fn events_mut(&mut self) -> &mut EventManager<Self>;
 
@@ -18,7 +20,7 @@ pub trait HasEvents: Sized + HasUi + 'static {
     }
 }
 
-pub trait RunEvents: HasEvents + 'static {
+pub trait RunEvents: HasEvents {
     fn run_event<E: EventLike>(
         &mut self,
         id: impl IdLike,
@@ -29,4 +31,4 @@ pub trait RunEvents: HasEvents + 'static {
         f(EventCtx { state, data }, self)
     }
 }
-impl<T: HasEvents + 'static> RunEvents for T {}
+impl<T: HasEvents> RunEvents for T {}

core/src/widget/handle.rs

@@ -169,3 +169,5 @@ fn null_ptr<W: ?Sized>() -> *const W {
         unsafe { std::mem::transmute_copy(&[0usize; 1]) }
     }
 }
+
+unsafe impl<W: ?Sized> Send for WidgetRef<W> {}

examples/task.rs

@@ -0,0 +1,33 @@
+use std::time::Duration;
+
+iris::state_prelude!(DefaultRsc<State>);
+
+fn main() {
+    DefaultApp::<State>::run();
+}
+
+#[derive(DefaultUiState)]
+struct State {
+    ui_state: DefaultUiState,
+}
+
+impl DefaultAppState for State {
+    fn new(ui_state: DefaultUiState, rsc: &mut DefaultRsc<Self>, _: Proxy<Self::Event>) -> Self {
+        let rect = rect(Color::RED).add(rsc);
+        rect.on(CursorSense::click(), move |_, rsc| {
+            rsc.tasks.spawn(async move |ctx| {
+                tokio::time::sleep(Duration::from_secs(1)).await;
+                ctx.update(move |_, rsc| {
+                    let rect = rect(rsc);
+                    if rect.color == Color::RED {
+                        rect.color = Color::GREEN;
+                    } else {
+                        rect.color = Color::RED;
+                    }
+                });
+            });
+        })
+        .set_root(rsc);
+        Self { ui_state }
+    }
+}

src/default/mod.rs

@@ -17,6 +17,7 @@ mod event;
 mod input;
 mod render;
 mod sense;
+mod task;
 
 pub use app::*;
 pub use attr::*;
@@ -24,6 +25,7 @@ pub use event::*;
 pub use input::*;
 pub use render::*;
 pub use sense::*;
+pub use task::*;
 
 pub type Proxy<Event> = EventLoopProxy<Event>;
 
@@ -79,19 +81,25 @@ pub trait DefaultAppState: HasDefaultUiState {
     }
 }
 
-pub struct DefaultRsc<State> {
+pub struct DefaultRsc<State: 'static> {
     pub ui: Ui,
     pub events: EventManager<Self>,
+    pub tasks: Tasks<Self>,
     _state: PhantomData<State>,
 }
 
-impl<State> Default for DefaultRsc<State> {
-    fn default() -> Self {
+impl<State> DefaultRsc<State> {
+    fn init(window: Arc<Window>) -> (Self, TaskMsgReceiver<Self>) {
+        let (tasks, recv) = Tasks::init(window);
+        (
             Self {
                 ui: Default::default(),
                 events: Default::default(),
+                tasks,
                 _state: Default::default(),
-        }
+            },
+            recv,
+        )
     }
 }
 
@@ -105,9 +113,11 @@ impl<State> HasUi for DefaultRsc<State> {
     }
 }
 
-impl<State: 'static> HasEvents for DefaultRsc<State> {
+impl<State: 'static> HasState for DefaultRsc<State> {
     type State = State;
+}
 
+impl<State: 'static> HasEvents for DefaultRsc<State> {
     fn events(&self) -> &EventManager<Self> {
         &self.events
     }
@@ -120,11 +130,9 @@ impl<State: 'static> HasEvents for DefaultRsc<State> {
 pub struct DefaultApp<State: DefaultAppState> {
     rsc: DefaultRsc<State>,
     state: State,
+    task_recv: TaskMsgReceiver<DefaultRsc<State>>,
 }
 
-// impl StateLike for DefaultRsc<State> {
-// }
-//
 impl<State: DefaultAppState> AppState for DefaultApp<State> {
     type Event = State::Event;
 
@@ -132,9 +140,14 @@ impl<State: DefaultAppState> AppState for DefaultApp<State> {
         let window = event_loop
             .create_window(State::window_attributes())
             .unwrap();
-        let mut rsc = DefaultRsc::default();
-        let state = State::new(DefaultUiState::new(window), &mut rsc, proxy);
-        Self { rsc, state }
+        let default_state = DefaultUiState::new(window);
+        let (mut rsc, task_recv) = DefaultRsc::init(default_state.window.clone());
+        let state = State::new(default_state, &mut rsc, proxy);
+        Self {
+            rsc,
+            state,
+            task_recv,
+        }
     }
 
     fn event(&mut self, event: Self::Event, _: &ActiveEventLoop) {
@@ -142,6 +155,10 @@ impl<State: DefaultAppState> AppState for DefaultApp<State> {
     }
 
     fn window_event(&mut self, event: WindowEvent, event_loop: &ActiveEventLoop) {
+        for update in self.task_recv.try_iter() {
+            update(&mut self.state, &mut self.rsc);
+        }
+
         let ui_state = self.state.default_state_mut();
         let input_changed = ui_state.input.event(&event);
         let cursor_state = ui_state.cursor_state().clone();

src/default/task.rs

@@ -0,0 +1,85 @@
+use iris_core::HasState;
+use std::{
+    pin::Pin,
+    sync::{
+        Arc,
+        mpsc::{Receiver as SyncReceiver, Sender as SyncSender, channel as sync_channel},
+    },
+};
+use tokio::{
+    runtime::Runtime,
+    sync::mpsc::{
+        UnboundedReceiver as AsyncReceiver, UnboundedSender as AsyncSender,
+        unbounded_channel as async_channel,
+    },
+};
+use winit::window::Window;
+
+pub type TaskMsgSender<Rsc> = SyncSender<Box<dyn TaskUpdate<Rsc>>>;
+pub type TaskMsgReceiver<Rsc> = SyncReceiver<Box<dyn TaskUpdate<Rsc>>>;
+
+pub trait TaskUpdate<Rsc: HasState>: FnOnce(&mut Rsc::State, &mut Rsc) + Send {}
+impl<F: FnOnce(&mut Rsc::State, &mut Rsc) + Send, Rsc: HasState> TaskUpdate<Rsc> for F {}
+
+pub struct Tasks<Rsc: HasState> {
+    start: AsyncSender<BoxTask>,
+    window: Arc<Window>,
+    msg_send: SyncSender<Box<dyn TaskUpdate<Rsc>>>,
+}
+
+pub struct TaskCtx<Rsc: HasState> {
+    send: TaskMsgSender<Rsc>,
+}
+
+impl<Rsc: HasState> TaskCtx<Rsc> {
+    pub fn update(&mut self, f: impl TaskUpdate<Rsc> + 'static) {
+        let _ = self.send.send(Box::new(f));
+    }
+}
+impl<Rsc: HasState + 'static> TaskCtx<Rsc> {
+    fn new(send: TaskMsgSender<Rsc>) -> Self {
+        Self { send }
+    }
+}
+
+type BoxTask = Pin<Box<dyn Future<Output = ()> + Send>>;
+
+impl<Rsc: HasState> Tasks<Rsc> {
+    pub fn init(window: Arc<Window>) -> (Self, TaskMsgReceiver<Rsc>) {
+        let (start, start_recv) = async_channel();
+        let (msgs, msgs_recv) = sync_channel();
+        std::thread::spawn(|| {
+            let rt = Runtime::new().unwrap();
+            rt.block_on(listen(start_recv))
+        });
+        (
+            Self {
+                start,
+                msg_send: msgs,
+                window,
+            },
+            msgs_recv,
+        )
+    }
+
+    pub fn spawn<F: for<'a> AsyncFnOnce(&'a mut TaskCtx<Rsc>) + 'static + std::marker::Send>(
+        &mut self,
+        task: F,
+    ) where
+        for<'a> <F as AsyncFnOnce<(&'a mut TaskCtx<Rsc>,)>>::CallOnceFuture: Send,
+    {
+        let send = self.msg_send.clone();
+        let window = self.window.clone();
+        let _ = self.start.send(Box::pin(async move {
+            let mut ctx = TaskCtx::new(send);
+            task(&mut ctx).await;
+            window.request_redraw();
+        }));
+    }
+}
+
+async fn listen(mut recv: AsyncReceiver<BoxTask>) {
+    while let Some(task) = recv.recv().await {
+        tokio::spawn(task);
+    }
+}

src/event.rs

@@ -1,17 +1,20 @@
-use crate::prelude::*;
+use iris_core::*;
+use iris_macro::*;
+
+use crate::default::{TaskCtx, Tasks};
 
 pub mod eventable {
     use super::*;
     widget_trait! {
-        pub trait Eventable<Rsc: HasEvents + 'static>;
+        pub trait Eventable<Rsc: HasEvents>;
         fn on<E: EventLike>(
             self,
             event: E,
             f: impl for<'a> WidgetEventFn<Rsc, <E::Event as Event>::Data<'a>, WL::Widget>,
         ) -> impl WidgetIdFn<Rsc, WL::Widget> {
-            move |state| {
-                let id = self.add(state);
-                state.register_event(id, event.into_event(), move |ctx, rsc| {
+            move |rsc| {
+                let id = self.add(rsc);
+                rsc.register_event(id, event.into_event(), move |ctx, rsc| {
                     f(&mut EventIdCtx {
                         widget: id,
                         state: ctx.state,
@@ -22,4 +25,52 @@ pub mod eventable {
             }
         }
     }
+
+    // widget_trait! {
+    //     pub trait TaskEventable<Rsc: HasEvents + HasTasks>;
+    //     fn task_on<E: EventLike>(
+    //         self,
+    //         event: E,
+    //         f: impl for<'a> AsyncWidgetEventFn<Rsc, <E::Event as Event>::Data<'a>, WL::Widget>,
+    //     ) -> impl WidgetIdFn<Rsc, WL::Widget> {
+    //         move |rsc| {
+    //             let id = self.add(rsc);
+    //             rsc.register_event(id, event.into_event(), move |ctx, rsc| {
+    //                 rsc.tasks_mut().spawn(async move |task| {
+    //                     f(&mut AsyncEventIdCtx {
+    //                         widget: id,
+    //                         state: ctx.state,
+    //                         data: ctx.data,
+    //                         task,
+    //                     }, rsc).await;
+    //                 });
+    //             });
+    //             id
+    //         }
+    //     }
+    // }
+}
+
+pub trait HasTasks: Sized + HasState + HasEvents {
+    fn tasks_mut(&mut self) -> &mut Tasks<Self>;
+}
+
+pub trait AsyncWidgetEventFn<Rsc: HasEvents, Data, W: ?Sized>:
+    AsyncFn(&mut AsyncEventIdCtx<Rsc, Data, W>, &mut Rsc) + 'static
+{
+}
+impl<
+    Rsc: HasEvents,
+    F: AsyncFn(&mut AsyncEventIdCtx<Rsc, Data, W>, &mut Rsc) + 'static,
+    Data,
+    W: ?Sized,
+> AsyncWidgetEventFn<Rsc, Data, W> for F
+{
+}
+
+pub struct AsyncEventIdCtx<'a, Rsc: HasEvents, Data, W: ?Sized> {
+    pub widget: WidgetRef<W>,
+    pub state: &'a mut Rsc::State,
+    pub data: &'a mut Data,
+    pub task: &'a mut TaskCtx<Rsc>,
 }

src/lib.rs

@@ -4,6 +4,7 @@
 #![feature(associated_type_defaults)]
 #![feature(unsize)]
 #![feature(option_into_flat_iter)]
+#![feature(async_fn_traits)]
 
 pub mod default;
 pub mod event;

src/typed.rs

@@ -30,7 +30,7 @@ macro_rules! event_state {
                 }
             }
         }
-        $vis type EventManager = $crate::prelude::EventManager<<$rsc as HasEvents>::State>;
+        $vis type EventManager = $crate::prelude::EventManager<<$rsc as HasState>::State>;
         $vis use local_event_trait::*;
     };
 }

src/widget/trait_fns.rs

@@ -84,7 +84,7 @@ widget_trait! {
     }
 
     fn scrollable(self) -> impl WidgetIdFn<Rsc, Scroll> where Rsc: HasEvents {
-        use eventable::*;
+        use eventable::Eventable;
         move |state| {
             Scroll::new(self.add_strong(state), Axis::Y)
                 .on(CursorSense::Scroll, |ctx, rsc| {