event system!!!

TODO

@@ -1,6 +1,6 @@
 images
     settings (sampler)
-abstract sensors to work with any event, maybe associate data as well?
+consider unsafe cell
 
 really weird limitation:
     I don't think you can currently remove an element from a parent and put it in a child of the same parent

src/core/sense.rs

@@ -1,6 +1,9 @@
 use crate::prelude::*;
 
-use std::ops::{BitOr, Deref, DerefMut};
+use std::{
+    ops::{BitOr, Deref, DerefMut},
+    rc::Rc,
+};
 
 use crate::{
     layout::{UiModule, UiRegion, Vec2},
@@ -11,12 +14,14 @@ pub trait CursorCtx {
     fn cursor_state(&self) -> &CursorState;
 }
 
+#[derive(PartialEq)]
 pub enum Button {
     Left,
     Right,
     Middle,
 }
 
+#[derive(PartialEq)]
 pub enum Sense {
     PressStart(Button),
     Pressing(Button),
@@ -78,7 +83,7 @@ pub enum ActivationState {
 
 pub struct Sensor<Ctx> {
     pub senses: Senses,
-    pub f: Box<dyn SenseFn<Ctx>>,
+    pub f: Rc<dyn SenseFn<Ctx>>,
 }
 
 pub type SensorMap<Ctx> = HashMap<Id, SensorGroup<Ctx>>;
@@ -88,13 +93,14 @@ pub struct SensorGroup<Ctx> {
     pub sensors: Vec<Sensor<Ctx>>,
 }
 
+#[derive(Clone)]
 pub struct SenseData {
     pub cursor: Vec2,
     pub size: Vec2,
 }
 
-pub trait SenseFn<Ctx>: FnMut(&mut Ctx, SenseData) + 'static {}
+pub trait SenseFn<Ctx>: Fn(&mut Ctx, SenseData) + 'static {}
-impl<F: FnMut(&mut Ctx, SenseData) + 'static, Ctx> SenseFn<Ctx> for F {}
+impl<F: Fn(&mut Ctx, SenseData) + 'static, Ctx> SenseFn<Ctx> for F {}
 
 pub struct SensorModule<Ctx> {
     map: SensorMap<Ctx>,
@@ -242,24 +248,48 @@ impl<Ctx: 'static> Event<Ctx> for Senses {
     type Data = SenseData;
 }
 
-impl<Ctx: 'static> EventModule<Ctx, Senses> for SensorModule<Ctx> {
-    fn register(&mut self, id: Id, senses: Senses, f: impl EventFn<Ctx, SenseData>) {
-        // TODO: does not add to active if currently active
-        self.map.entry(id).or_default().sensors.push(Sensor {
-            senses,
-            f: Box::new(f),
-        });
-    }
-}
-
 impl<Ctx: 'static> Event<Ctx> for Sense {
     type Module = SensorModule<Ctx>;
     type Data = SenseData;
 }
 
-impl<Ctx: 'static> EventModule<Ctx, Sense> for SensorModule<Ctx> {
+impl<E: Event<Ctx, Data = <Senses as Event<Ctx>>::Data> + Into<Senses>, Ctx: 'static>
-    fn register(&mut self, id: Id, sense: Sense, f: impl EventFn<Ctx, SenseData>) {
+    EventModule<E, Ctx> for SensorModule<Ctx>
-        self.register(id, Senses::from(sense), f);
+{
+    fn register(&mut self, id: Id, senses: E, f: impl EventFn<Ctx, <E as Event<Ctx>>::Data>) {
+        // TODO: does not add to active if currently active
+        self.map.entry(id).or_default().sensors.push(Sensor {
+            senses: senses.into(),
+            f: Rc::new(f),
+        });
+    }
+
+    fn run<'a>(
+        &mut self,
+        id: &Id,
+        event: E,
+    ) -> Option<impl Fn(&mut Ctx, E::Data) + use<'a, E, Ctx>> {
+        let senses = event.into();
+        if let Some(group) = self.map.get_mut(id) {
+            let fs: Vec<_> = group
+                .sensors
+                .iter()
+                .filter_map(|sensor| {
+                    if sensor.senses.iter().any(|s| senses.contains(s)) {
+                        Some(sensor.f.clone())
+                    } else {
+                        None
+                    }
+                })
+                .collect();
+            Some(move |ctx: &mut Ctx, data: SenseData| {
+                for f in &fs {
+                    f(ctx, data.clone());
+                }
+            })
+        } else {
+            None
+        }
     }
 }
 

src/core/text_edit.rs

@@ -1,5 +1,5 @@
 use crate::prelude::*;
-use cosmic_text::{Attrs, Cursor, Family, FontSystem, Metrics, Motion, Shaping};
+use cosmic_text::{Affinity, Attrs, Cursor, Family, FontSystem, Metrics, Motion, Shaping};
 use unicode_segmentation::UnicodeSegmentation;
 use winit::{
     event::KeyEvent,
@@ -133,6 +133,11 @@ impl<'a> TextEditCtx<'a> {
         self.text
             .buf
             .set_text(self.font_system, "", &Attrs::new(), Shaping::Advanced);
+        if let Some(cursor) = &mut self.text.cursor {
+            cursor.line = 0;
+            cursor.index = 0;
+            cursor.affinity = Affinity::default();
+        }
         text
     }
 
@@ -219,13 +224,19 @@ impl<'a> TextEditCtx<'a> {
         self.text.cursor = None;
     }
 
-    pub fn apply_event(&mut self, event: &KeyEvent) -> TextInputResult {
+    pub fn apply_event(&mut self, event: &KeyEvent, modifiers: &Modifiers) -> TextInputResult {
         match &event.logical_key {
             Key::Named(named) => match named {
                 NamedKey::Backspace => self.backspace(),
                 NamedKey::Delete => self.delete(),
                 NamedKey::Space => self.insert(" "),
-                NamedKey::Enter => self.insert("\n"),
+                NamedKey::Enter => {
+                    if modifiers.shift {
+                        self.newline();
+                    } else {
+                        return TextInputResult::Submit;
+                    }
+                }
                 NamedKey::ArrowRight => self.motion(Motion::Right),
                 NamedKey::ArrowLeft => self.motion(Motion::Left),
                 NamedKey::ArrowUp => self.motion(Motion::Up),
@@ -243,10 +254,24 @@ impl<'a> TextEditCtx<'a> {
     }
 }
 
+#[derive(Default)]
+pub struct Modifiers {
+    pub shift: bool,
+    pub control: bool,
+}
+
+impl Modifiers {
+    pub fn clear(&mut self) {
+        self.shift = false;
+        self.control = false;
+    }
+}
+
 pub enum TextInputResult {
     Used,
     Unused,
     Unfocus,
+    Submit,
 }
 
 impl TextInputResult {

src/layout/event.rs

@@ -1,6 +1,8 @@
+use std::{hash::Hash, rc::Rc};
+
 use crate::{
     layout::{IdFnTag, Ui, UiModule, Widget, WidgetId, WidgetIdFn, WidgetLike},
-    util::Id,
+    util::{HashMap, Id},
 };
 
 pub trait UiCtx {
@@ -14,16 +16,12 @@ impl UiCtx for Ui {
 }
 
 pub trait Event<Ctx>: Sized {
-    type Module: UiModule + EventModule<Ctx, Self> + Default;
+    type Module: EventModule<Self, Ctx>;
-    type Data;
+    type Data: Clone;
 }
 
-pub trait EventModule<Ctx, E: Event<Ctx>> {
+pub trait EventFn<Ctx, Data>: Fn(&mut Ctx, Data) + 'static {}
-    fn register(&mut self, id: Id, event: E, f: impl EventFn<Ctx, E::Data>);
+impl<F: Fn(&mut Ctx, Data) + 'static, Ctx, Data> EventFn<Ctx, Data> for F {}
-}
-
-pub trait EventFn<Ctx, Data>: FnMut(&mut Ctx, Data) + 'static {}
-impl<F: FnMut(&mut Ctx, Data) + 'static, Ctx, Data> EventFn<Ctx, Data> for F {}
 
 pub trait Eventable<W, Tag> {
     fn on<E: Event<Ctx>, Ctx>(
@@ -35,7 +33,7 @@ pub trait Eventable<W, Tag> {
     fn id_on<E: Event<Ctx>, Ctx>(
         self,
         event: E,
-        f: impl FnMut(&WidgetId<W>, &mut Ctx, E::Data) + 'static,
+        f: impl Fn(&WidgetId<W>, &mut Ctx, E::Data) + 'static,
     ) -> impl WidgetIdFn<W> + Eventable<W, IdFnTag>
     where
         W: Widget;
@@ -43,7 +41,7 @@ pub trait Eventable<W, Tag> {
     fn edit_on<E: Event<Ui>>(
         self,
         event: E,
-        f: impl FnMut(&mut W, E::Data) + 'static,
+        f: impl Fn(&mut W, E::Data) + 'static,
     ) -> impl WidgetIdFn<W> + Eventable<W, IdFnTag>
     where
         W: Widget;
@@ -67,7 +65,7 @@ impl<W: WidgetLike<Tag>, Tag> Eventable<W::Widget, Tag> for W {
     fn id_on<E: Event<Ctx>, Ctx>(
         self,
         event: E,
-        mut f: impl FnMut(&WidgetId<W::Widget>, &mut Ctx, E::Data) + 'static,
+        mut f: impl Fn(&WidgetId<W::Widget>, &mut Ctx, E::Data) + 'static,
     ) -> impl WidgetIdFn<W::Widget>
     where
         W::Widget: Widget,
@@ -81,7 +79,7 @@ impl<W: WidgetLike<Tag>, Tag> Eventable<W::Widget, Tag> for W {
     fn edit_on<E: Event<Ui>>(
         self,
         event: E,
-        mut f: impl FnMut(&mut W::Widget, E::Data) + 'static,
+        mut f: impl Fn(&mut W::Widget, E::Data) + 'static,
     ) -> impl WidgetIdFn<W::Widget>
     where
         W::Widget: Widget,
@@ -89,3 +87,116 @@ impl<W: WidgetLike<Tag>, Tag> Eventable<W::Widget, Tag> for W {
         self.id_on(event, move |id, ui, pos| f(&mut ui[id], pos))
     }
 }
+
+pub trait DefaultEvent: Hash + Eq + 'static {
+    type Data: Clone;
+}
+
+impl<E: DefaultEvent, Ctx: 'static> Event<Ctx> for E {
+    type Module = DefaultEventModule<E, Ctx>;
+    type Data = E::Data;
+}
+
+pub trait EventModule<E: Event<Ctx>, Ctx>: UiModule + Default {
+    fn register(&mut self, id: Id, event: E, f: impl EventFn<Ctx, E::Data>);
+    fn run<'a>(
+        &mut self,
+        id: &Id,
+        event: E,
+    ) -> Option<impl Fn(&mut Ctx, E::Data) + use<'a, Self, E, Ctx>>;
+}
+
+type EventFnMap<Ctx, Data> = HashMap<Id, Vec<Rc<dyn EventFn<Ctx, Data>>>>;
+pub struct DefaultEventModule<E: Event<Ctx>, Ctx> {
+    map: HashMap<E, EventFnMap<Ctx, <E as Event<Ctx>>::Data>>,
+}
+
+impl<E: Event<Ctx> + 'static, Ctx: 'static> UiModule for DefaultEventModule<E, Ctx> {
+    fn on_remove(&mut self, id: &Id) {
+        for map in self.map.values_mut() {
+            map.remove(id);
+        }
+    }
+}
+
+pub trait HashableEvent<Ctx>: Event<Ctx> + Hash + Eq + 'static {}
+impl<E: Event<Ctx> + Hash + Eq + 'static, Ctx> HashableEvent<Ctx> for E {}
+
+impl<E: HashableEvent<Ctx>, Ctx: 'static> EventModule<E, Ctx> for DefaultEventModule<E, Ctx> {
+    fn register(&mut self, id: Id, event: E, f: impl EventFn<Ctx, <E as Event<Ctx>>::Data>) {
+        self.map
+            .entry(event)
+            .or_default()
+            .entry(id)
+            .or_default()
+            .push(Rc::new(f));
+    }
+
+    fn run<'a>(
+        &mut self,
+        id: &Id,
+        event: E,
+    ) -> Option<impl Fn(&mut Ctx, E::Data) + use<'a, E, Ctx>> {
+        if let Some(map) = self.map.get_mut(&event)
+            && let Some(fs) = map.get(id)
+        {
+            let fs = fs.clone();
+            Some(move |ctx: &mut Ctx, data: E::Data| {
+                for f in &fs {
+                    f(ctx, data.clone())
+                }
+            })
+        } else {
+            None
+        }
+    }
+}
+
+impl<E: HashableEvent<Ctx>, Ctx: 'static> DefaultEventModule<E, Ctx> {
+    pub fn run_all(&mut self, ctx: &mut Ctx, event: E, data: E::Data)
+    where
+        E::Data: Clone,
+    {
+        if let Some(map) = self.map.get_mut(&event) {
+            for fs in map.values_mut() {
+                for f in fs {
+                    f(ctx, data.clone())
+                }
+            }
+        }
+    }
+
+    pub fn run<W>(&mut self, ctx: &mut Ctx, id: WidgetId<W>, event: E, data: E::Data)
+    where
+        E::Data: Clone,
+    {
+        if let Some(map) = self.map.get_mut(&event)
+            && let Some(fs) = map.get_mut(&id.id)
+        {
+            for f in fs {
+                f(ctx, data.clone())
+            }
+        }
+    }
+}
+
+impl<E: Event<Ctx> + 'static, Ctx: 'static> Default for DefaultEventModule<E, Ctx> {
+    fn default() -> Self {
+        Self {
+            map: Default::default(),
+        }
+    }
+}
+
+impl Ui {
+    pub fn run_event<E: Event<Ctx>, Ctx: UiCtx, W>(
+        ctx: &mut Ctx,
+        id: &WidgetId<W>,
+        event: E,
+        data: E::Data,
+    ) {
+        if let Some(f) = ctx.ui().modules.get_mut::<E::Module>().run(&id.id, event) {
+            f(ctx, data);
+        }
+    }
+}

src/testing/input.rs

@@ -1,11 +1,18 @@
-use ui::{core::CursorState, layout::Vec2};
+use ui::{
-use winit::event::{MouseButton, WindowEvent};
+    core::{CursorState, Modifiers},
+    layout::Vec2,
+};
+use winit::{
+    event::{MouseButton, WindowEvent},
+    keyboard::{Key, NamedKey},
+};
 
 use crate::testing::Client;
 
 #[derive(Default)]
 pub struct Input {
     cursor: CursorState,
+    pub modifiers: Modifiers,
 }
 
 impl Input {
@@ -27,6 +34,21 @@ impl Input {
             }
             WindowEvent::CursorLeft { .. } => {
                 self.cursor.exists = false;
+                self.modifiers.clear();
+            }
+            WindowEvent::KeyboardInput { event, .. } => {
+                if let Key::Named(named) = event.logical_key {
+                    let pressed = event.state.is_pressed();
+                    match named {
+                        NamedKey::Control => {
+                            self.modifiers.control = pressed;
+                        }
+                        NamedKey::Shift => {
+                            self.modifiers.shift = pressed;
+                        }
+                        _ => (),
+                    }
+                }
             }
             _ => return false,
         }

src/testing/mod.rs

@@ -24,6 +24,13 @@ pub struct Client {
     focus: Option<WidgetId<TextEdit>>,
 }
 
+#[derive(Eq, PartialEq, Hash)]
+struct Submit;
+
+impl DefaultEvent for Submit {
+    type Data = ();
+}
+
 impl Client {
     pub fn new(window: Arc<Window>) -> Self {
         let renderer = Renderer::new(window);
@@ -119,7 +126,7 @@ impl Client {
             .span(Dir::DOWN, sized())
             .add_static(&mut ui);
 
-        let texts = Span::empty(Dir::DOWN).add(&mut ui);
+        let texts = Span::empty(Dir::DOWN).add_static(&mut ui);
         let add_text = text_edit("add")
             .text_align(Align::Left)
             .font_size(30)
@@ -127,14 +134,8 @@ impl Client {
                 client.ui.text(id).select(ctx.cursor, ctx.size);
                 client.focus = Some(id.clone());
             })
-            .add(&mut ui);
+            .id_on(Submit, move |id, client: &mut Client, _| {
-        let text_edit_scroll = (
+                let content = client.ui.text(id).take();
-            (Rect::new(Color::SKY), texts.clone()).stack(),
-            (
-                add_text.clone(),
-                Rect::new(Color::GREEN)
-                    .on(Sense::click(), move |client: &mut Client, _| {
-                        let content = client.ui.text(&add_text).take();
                 let text = text_edit(content)
                     .font_size(30)
                     .id_on(Sense::click(), |id, client: &mut Client, ctx| {
@@ -143,7 +144,16 @@ impl Client {
                     })
                     .pad(10)
                     .add(&mut client.ui);
-                        client.ui[&texts].children.push((text.any(), sized()));
+                client.ui[texts].children.push((text.any(), sized()));
+            })
+            .add(&mut ui);
+        let text_edit_scroll = (
+            (Rect::new(Color::SKY), texts).stack(),
+            (
+                add_text.clone(),
+                Rect::new(Color::GREEN)
+                    .on(Sense::click(), move |client: &mut Client, _| {
+                        Ui::run_event(client, &add_text, Submit, ());
                     })
                     .size(40),
             )
@@ -228,10 +238,17 @@ impl Client {
             WindowEvent::KeyboardInput { event, .. } => {
                 if let Some(sel) = &self.focus
                     && event.state.is_pressed()
-                    && self.ui.text(sel).apply_event(&event).unfocus()
                 {
+                    match self.ui.text(sel).apply_event(&event, &self.input.modifiers) {
+                        TextInputResult::Unfocus => {
                             self.focus = None;
                         }
+                        TextInputResult::Submit => {
+                            Ui::run_event(self, &sel.clone(), Submit, ());
+                        }
+                        _ => (),
+                    }
+                }
             }
             _ => (),
         }