click events! soon there will be buttons!

src/application.rs

@@ -9,7 +9,7 @@
 use std::cell::RefCell;
 use std::collections::HashMap;
 use std::rc::Rc;
-use winit::event::{Event, WindowEvent as WinitWindowEvent};
+use winit::event::{Event, WindowEvent as WinitWindowEvent, ElementState};
 use winit::event_loop::EventLoop;
 use winit::window::WindowId;
 use crate::context::Context;
@@ -107,14 +107,39 @@ impl Application {
                         emit_app_event!(self, ApplicationEvent::AllWindowsDestroyed);
                     }
                 }
+
                 Event::WindowEvent {
                     window_id,
                     event: WinitWindowEvent::Resized(size)
                 } => self.windows.get_mut(&window_id).unwrap().resized(size),
+
+                Event::WindowEvent {
+                    window_id,
+                    event: WinitWindowEvent::CursorMoved {
+                        position,
+                        ..
+                    },
+                } => self.windows.get_mut(&window_id).unwrap().cursor_moved(position),
+
+                Event::WindowEvent {
+                    window_id,
+                    event: WinitWindowEvent::MouseInput {
+                        state,
+                        button,
+                        ..
+                    },
+                } => match state {
+                    ElementState::Pressed => self.windows
+                        .get_mut(&window_id).unwrap().mouse_pressed(button),
+                    ElementState::Released => self.windows
+                        .get_mut(&window_id).unwrap().mouse_released(button),
+                }
+
                 Event::MainEventsCleared => {
                     // determine if state changed and request redraw if needed
                     // rinse and repeat for every window
                 }
+
                 Event::RedrawRequested(window_id) =>
                     self.windows.get_mut(&window_id).unwrap().render(),
 

src/layout/position.rs

@@ -18,6 +18,10 @@ impl Position {
     pub fn new(x: u32, y: u32, width: u32, height: u32) -> Self {
         Position { x, y, width, height }
     }
+
+    pub fn contains(&self, x: u32, y: u32) -> bool {
+        x >= self.x && y >= self.y && x < self.x + self.width && y < self.y + self.height
+    }
     
     pub fn x(&self) -> u32 {
         self.x

src/widget/column.rs

@@ -6,8 +6,9 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
 
-use crate::{layout::position::Position, widget::Widget};
+use crate::{layout::position::Position, widget::Widget, window::Window};
 use abletk_common::Renderer;
+use winit::event::MouseButton;
 
 pub struct Column {
     widgets: Vec<Box<dyn Widget>>,
@@ -43,6 +44,78 @@ impl Widget for Column {
 
         Position::new(0, 0, width, height)
     }
+
+    fn mouse_pressed(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    ) {
+        let mut pos = Position::new(0, 0, 0, 0);
+        for widget in &mut self.widgets {
+            let widget_pos = widget.position(renderer);
+            pos = Position::new(
+                widget_pos.x(),
+                pos.y() + widget_pos.y(),
+                widget_pos.width(),
+                widget_pos.height(),
+            );
+
+            if pos.contains(x, y) {
+                widget.mouse_pressed(
+                    renderer,
+                    window,
+                    button,
+                    x - pos.x(),
+                    y - pos.y(),
+                );
+            }
+
+            pos = Position::new(
+                pos.x(),
+                pos.y() + widget_pos.height(),
+                pos.width(),
+                pos.height(),
+            )
+        }
+    }
+
+    fn mouse_released(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    ) {
+        let mut pos = Position::new(0, 0, 0, 0);
+        for widget in &mut self.widgets {
+            let widget_pos = widget.position(renderer);
+            pos = Position::new(
+                widget_pos.x(),
+                pos.y() + widget_pos.y(),
+                widget_pos.width(),
+                widget_pos.height(),
+            );
+
+            if pos.contains(x, y) {
+                widget.mouse_released(
+                    renderer,
+                    window,
+                    button,
+                    x - pos.x(),
+                    y - pos.y(),
+                );
+            }
+
+            pos = Position::new(
+                pos.x(),
+                pos.y() + widget_pos.height(),
+                pos.width(),
+                pos.height(),
+            )
+        }
+    }
 }
 
 impl Column {

src/widget/label.rs

@@ -7,7 +7,8 @@
  */
 
 use abletk_common::{Renderer, brush::Brush, color::Color, rgb};
-use crate::{widget::Widget, layout::position::Position};
+use winit::event::MouseButton;
+use crate::{widget::Widget, layout::position::Position, window::Window};
 
 pub struct Label {
     text: String,
@@ -28,6 +29,26 @@ impl Widget for Label {
         let (width, height) = renderer.get_text_size(&self.text);
         Position::new(0, 0, width, height)
     }
+
+    fn mouse_pressed(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    ) {
+        eprintln!("Label::mouse_pressed {} {x}, {y}", self.text);
+    }
+
+    fn mouse_released(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    ) {
+        eprintln!("Label::mouse_released {} {x}, {y}", self.text);
+    }
 }
 
 impl Label {

src/widget/mod.rs

@@ -16,11 +16,29 @@ pub use column::*;
 pub use label::*;
 pub use padding::*;
 pub use row::*;
+use winit::event::MouseButton;
 
-use crate::layout::position::Position;
+use crate::{layout::position::Position, window::Window};
 
 pub trait Widget {
     fn draw(&self, renderer: &mut Renderer);
+
     // fixme: don't pass renderer
     fn position(&self, renderer: &mut Renderer) -> Position;
+
+    fn mouse_pressed(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    );
+
+    fn mouse_released(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    );
 }

src/widget/padding.rs

@@ -6,8 +6,9 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
 
-use crate::{layout::position::Position, widget::Widget};
+use crate::{layout::position::Position, widget::Widget, window::Window};
 use abletk_common::Renderer;
+use winit::event::MouseButton;
 
 pub struct Padding<W: Widget> {
     widget: W,
@@ -32,6 +33,32 @@ impl<W: Widget> Widget for Padding<W> {
             pos.height() + self.bottom,
         )
     }
+
+    fn mouse_pressed(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    ) {
+        let pos = self.position(renderer);
+        if pos.contains(x, y) {
+            self.widget.mouse_pressed(renderer, window, button, x - pos.x(), y - pos.y());
+        }
+    }
+
+    fn mouse_released(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    ) {
+        let pos = self.position(renderer);
+        if pos.contains(x, y) {
+            self.widget.mouse_released(renderer, window, button, x - pos.x(), y - pos.y());
+        }
+    }
 }
 
 impl<W: Widget> Padding<W> {

src/widget/row.rs

@@ -6,8 +6,9 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
 
-use crate::{layout::position::Position, widget::Widget};
+use crate::{layout::position::Position, widget::Widget, window::Window};
 use abletk_common::Renderer;
+use winit::event::MouseButton;
 
 pub struct Row {
     widgets: Vec<Box<dyn Widget>>,
@@ -43,6 +44,78 @@ impl Widget for Row {
 
         Position::new(0, 0, width, height)
     }
+
+    fn mouse_pressed(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    ) {
+        let mut pos = Position::new(0, 0, 0, 0);
+        for widget in &mut self.widgets {
+            let widget_pos = widget.position(renderer);
+            pos = Position::new(
+                widget_pos.x() + pos.x(),
+                widget_pos.y(),
+                widget_pos.width(),
+                widget_pos.height(),
+            );
+
+            if pos.contains(x, y) {
+                widget.mouse_pressed(
+                    renderer,
+                    window,
+                    button,
+                    x - pos.x(),
+                    y - pos.y(),
+                );
+            }
+
+            pos = Position::new(
+                pos.x() + widget_pos.width(),
+                pos.y(),
+                pos.width(),
+                pos.height(),
+            );
+        }
+    }
+
+    fn mouse_released(&mut self,
+        renderer: &mut Renderer,
+        window: &mut Window,
+        button: MouseButton,
+        x: u32,
+        y: u32,
+    ) {
+        let mut pos = Position::new(0, 0, 0, 0);
+        for widget in &mut self.widgets {
+            let widget_pos = widget.position(renderer);
+            pos = Position::new(
+                widget_pos.x() + pos.x(),
+                widget_pos.y(),
+                widget_pos.width(),
+                widget_pos.height(),
+            );
+
+            if pos.contains(x, y) {
+                widget.mouse_released(
+                    renderer,
+                    window,
+                    button,
+                    x - pos.x(),
+                    y - pos.y(),
+                );
+            }
+
+            pos = Position::new(
+                pos.x() + widget_pos.width(),
+                pos.y(),
+                pos.width(),
+                pos.height(),
+            );
+        }
+    }
 }
 
 impl Row {

src/window.rs

@@ -12,7 +12,7 @@ use std::rc::Rc;
 use raw_window_handle::HasRawWindowHandle;
 use winit::{
     event_loop::EventLoopWindowTarget,
-    window::{Window as WinitWindow, WindowBuilder as WinitWindowBuilder},
+    window::{Window as WinitWindow, WindowBuilder as WinitWindowBuilder}, dpi::PhysicalPosition, event::MouseButton,
 };
 use winit::dpi::PhysicalSize;
 use winit::error::OsError;
@@ -26,10 +26,11 @@ use crate::widget::Widget;
 pub struct Window {
     window: WinitWindow,
     events: HashMap<Event, Vec<fn(&mut Context, &mut Window)>>,
-    root: Box<dyn Widget>,
+    root: Option<Box<dyn Widget>>,
     ctx: Rc<RefCell<Context>>,
-    renderer: Renderer,
+    renderer: Option<Renderer>,
     background: Color,
+    cursor_pos: (u32, u32),
 }
 
 impl Window {
@@ -58,12 +59,13 @@ impl Window {
             .build(event_loop)?;
 
         Ok(Self {
-            renderer: Renderer::new(window.raw_window_handle()),
+            renderer: Some(Renderer::new(window.raw_window_handle())),
             window,
             background,
             events,
-            root,
+            root: Some(root),
             ctx,
+            cursor_pos: (0, 0),
         })
     }
 
@@ -72,16 +74,14 @@ impl Window {
     }
 
     pub(crate) fn render(&mut self) {
-        let position = self.root.position(&mut self.renderer);
+        let root = self.root.as_ref().unwrap();
-        self.renderer.begin_draw();
+        let renderer = self.renderer.as_mut().unwrap();
-        self.renderer.clear(self.background);
+        let position = root.position(renderer);
-        self.renderer.position_at(position.x(), position.y());
+        renderer.begin_draw();
-        self.root.draw(&mut self.renderer);
+        renderer.clear(self.background);
-        self.renderer.end_draw()
+        renderer.position_at(position.x(), position.y());
-    }
+        root.draw(renderer);
-
+        renderer.end_draw()
-    pub fn set_always_on_top(&self, value: bool) {
-        self.window.set_always_on_top(value)
     }
 
     pub fn focus(&self) {
@@ -92,6 +92,10 @@ impl Window {
         self.window.request_redraw()
     }
 
+    pub fn set_always_on_top(&self, value: bool) {
+        self.window.set_always_on_top(value)
+    }
+
     pub fn set_title<S: AsRef<str> + Into<String>>(&mut self, title: S) {
         self.window.set_title(title.as_ref())
     }
@@ -109,12 +113,60 @@ impl Window {
         }
     }
 
+    pub(crate) fn cursor_moved(&mut self, pos: PhysicalPosition<f64>) {
+        self.cursor_pos = (pos.x as u32, pos.y as u32)
+    }
+
     pub(crate) fn id(&self) -> WindowId {
         self.window.id()
     }
 
+    pub(crate) fn mouse_pressed(&mut self, button: MouseButton) {
+        if self.root
+            .as_ref()
+            .unwrap()
+            .position(self.renderer.as_mut().unwrap())
+            .contains(self.cursor_pos.0, self.cursor_pos.1)
+        {
+            let mut root = self.root.take().unwrap();
+            let mut renderer = self.renderer.take().unwrap();
+            root.mouse_pressed(
+                &mut renderer,
+                self,
+                button,
+                self.cursor_pos.0,
+                self.cursor_pos.1,
+            );
+
+            self.root = Some(root);
+            self.renderer = Some(renderer);
+        }
+    }
+
+    pub(crate) fn mouse_released(&mut self, button: MouseButton) {
+        if self.root
+            .as_ref()
+            .unwrap()
+            .position(self.renderer.as_mut().unwrap())
+            .contains(self.cursor_pos.0, self.cursor_pos.1)
+        {
+            let mut root = self.root.take().unwrap();
+            let mut renderer = self.renderer.take().unwrap();
+            root.mouse_released(
+                &mut renderer,
+                self,
+                button,
+                self.cursor_pos.0,
+                self.cursor_pos.1,
+            );
+
+            self.root = Some(root);
+            self.renderer = Some(renderer);
+        }
+    }
+
     pub(crate) fn resized(&mut self, size: PhysicalSize<u32>) {
-        self.renderer.resized(size.width, size.height);
+        self.renderer.as_mut().unwrap().resized(size.width, size.height);
         self.emit_event(Event::Resized)
     }
 }