Finished mouse handling for tile map

examples/tilemap.rs

@@ -67,7 +67,7 @@ fn main() -> gooey::Result {
 
             let one_second_movement = direction * TILE_SIZE.into_float();
 
-            let cursor_pos = input.mouse.pos;
+            let cursor_pos = input.mouse.as_ref().map(|mouse| mouse.position);
 
             layers.map_mut(|layers| {
                 let pos = &mut layers.1[myself].position;
@@ -76,21 +76,16 @@ fn main() -> gooey::Result {
                     one_second_movement.y * elapsed.as_secs_f32(),
                 );
 
-                let rect = Rect::new(*pos, Size::new(16., 16.));
-                let color = match rect.cast().contains(cursor_pos) {
-                    true => Color::RED,
-                    false => Color::BLUE,
-                };
+                let rect = Rect::new(*pos - Size::squared(8.), Size::squared(16.));
+                layers.1[myself].color =
+                    match cursor_pos.map_or(false, |cursor_pos| rect.cast().contains(cursor_pos)) {
+                        true => Color::RED,
+                        false => Color::BLUE,
+                    };
             });
         }));
 
-    Stack::rows(
-        tilemap
-            .debug_output(debug_message.clone())
-            .expand()
-            .and(Label::new(debug_message)),
-    )
-    .run()
+    Stack::rows(tilemap.expand().and(Label::new(debug_message))).run()
 }
 
 #[derive(Debug)]

src/tick.rs

@@ -3,10 +3,11 @@ use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::{Arc, Mutex, MutexGuard};
 use std::time::{Duration, Instant};
 
-use kludgine::app::winit::event::KeyEvent;
+use intentional::Assert;
+use kludgine::app::winit::event::{ElementState, KeyEvent, MouseButton};
 use kludgine::app::winit::keyboard::Key;
-use kludgine::figures::Point;
 use kludgine::figures::units::Px;
+use kludgine::figures::Point;
 
 use crate::context::WidgetContext;
 use crate::utils::{IgnorePoison, UnwindsafeCondvar};
@@ -51,9 +52,38 @@ impl Tick {
         }
     }
 
-    pub fn set_cursor_position(&self, pos: Point<Px>) {
+    /// Sets the cursor position.
+    pub fn set_cursor_position(&self, pos: Option<Point<Px>>) {
         let mut state = self.data.state();
-        state.input.mouse.pos = pos;
+        match pos {
+            Some(pos) => {
+                if state.input.mouse.is_none() {
+                    state.input.mouse = Some(Mouse::default());
+                }
+
+                state
+                    .input
+                    .mouse
+                    .as_mut()
+                    .assert("always initialized")
+                    .position = pos;
+            }
+            None => {
+                state.input.mouse = None;
+            }
+        }
+    }
+
+    /// Processes a mouse button event.
+    pub fn mouse_button(&self, button: MouseButton, button_state: ElementState) {
+        let mut state = self.data.state();
+        if let Some(mouse) = &mut state.input.mouse {
+            if button_state.is_pressed() {
+                mouse.buttons.insert(button);
+            } else {
+                mouse.buttons.remove(&button);
+            }
+        }
     }
 
     /// Returns a new tick that invokes `tick`, aiming to repeat at the given
@@ -70,7 +100,6 @@ impl Tick {
                 keep_running: true,
                 frame: 0,
                 input: InputState::default(),
-                mouse: None,
             }),
             period: tick_every,
             sync: UnwindsafeCondvar::new(),
@@ -119,15 +148,16 @@ impl Tick {
 pub struct InputState {
     /// A collection of all keys currently pressed.
     pub keys: HashSet<Key>,
-    pub mouse: Mouse,
+    /// The state of the mouse cursor and any buttons pressed.
+    pub mouse: Option<Mouse>,
 }
 
 #[derive(Debug, Default)]
 pub struct Mouse {
-    pub pos: Point<Px>,
+    pub position: Point<Px>,
+    pub buttons: HashSet<MouseButton>,
 }
 
-
 #[derive(Debug)]
 struct TickData {
     state: Mutex<TickState>,
@@ -150,7 +180,6 @@ struct TickState {
     keep_running: bool,
     frame: usize,
     input: InputState,
-    mouse: Option<Mouse>,
 }
 
 fn tick_loop<F>(data: &TickData, mut tick: F)

src/widgets/tilemap.rs

@@ -1,6 +1,8 @@
 use std::fmt::Debug;
 
 use intentional::Cast;
+use kludgine::app::winit::event::ElementState;
+use kludgine::app::winit::window::CursorIcon;
 use kludgine::figures::units::Px;
 use kludgine::figures::Point;
 
@@ -23,7 +25,6 @@ pub struct TileMap<Layers> {
     focus: Value<TileMapFocus>,
     zoom: f32,
     tick: Option<Tick>,
-    debug_output: Option<Dynamic<String>>,
 }
 
 impl<Layers> TileMap<Layers> {
@@ -33,15 +34,9 @@ impl<Layers> TileMap<Layers> {
             focus: Value::default(),
             zoom: 1.,
             tick: None,
-            debug_output: None,
         }
     }
 
-    pub fn debug_output(mut self, message: Dynamic<String>) -> Self {
-        self.debug_output = Some(message);
-        self
-    }
-
     /// Returns a new tilemap that contains dynamic layers.
     pub fn dynamic(layers: Dynamic<Layers>) -> Self {
         Self::construct(Value::Dynamic(layers))
@@ -126,20 +121,32 @@ where
         HANDLED
     }
 
-    fn hover(&mut self, local: Point<Px>, context: &mut EventContext<'_, '_>) {
-        let Some(size) = context.last_layout().map(|rect| rect.size) else { return };
-
-        let offset = self.layers.map(|layers| self.focus.get().world_coordinate(layers));
-
-        let scale = context.kludgine.scale();
-        let zoom = self.zoom;
-        let world = tilemap::translate_coordinates(local, offset, scale, zoom, size);
-
+    fn hover(
+        &mut self,
+        local: Point<Px>,
+        context: &mut EventContext<'_, '_>,
+    ) -> Option<CursorIcon> {
         if let Some(tick) = &self.tick {
-            tick.set_cursor_position(world);
+            let Some(size) = context.last_layout().map(|rect| rect.size) else {
+                return None;
+            };
+
+            let world =
+                tilemap::translate_coordinates(local, context.kludgine.scale(), self.zoom, size);
+            let offset = self
+                .layers
+                .map(|layers| self.focus.get().world_coordinate(layers));
+
+            tick.set_cursor_position(Some(world + offset));
         }
 
-        self.debug_output.as_ref().unwrap().set(format!("world: {world:?} | local: {local:?}"));
+        None
+    }
+
+    fn unhover(&mut self, _context: &mut EventContext<'_, '_>) {
+        if let Some(tick) = &self.tick {
+            tick.set_cursor_position(None);
+        }
     }
 
     fn keyboard_input(
@@ -155,4 +162,31 @@ where
 
         IGNORED
     }
+
+    fn mouse_down(
+        &mut self,
+        _location: Point<Px>,
+        _device_id: DeviceId,
+        button: kludgine::app::winit::event::MouseButton,
+        _context: &mut EventContext<'_, '_>,
+    ) -> EventHandling {
+        if let Some(tick) = &self.tick {
+            tick.mouse_button(button, ElementState::Pressed);
+            HANDLED
+        } else {
+            IGNORED
+        }
+    }
+
+    fn mouse_up(
+        &mut self,
+        _location: Option<Point<Px>>,
+        _device_id: DeviceId,
+        button: kludgine::app::winit::event::MouseButton,
+        _context: &mut EventContext<'_, '_>,
+    ) {
+        if let Some(tick) = &self.tick {
+            tick.mouse_button(button, ElementState::Released);
+        }
+    }
 }