Struct KeyboardState

Source

pub struct KeyboardState {
    pub pressed_this_frame: Vec<KeyCode>,
    pub released_this_frame: Vec<KeyCode>,
    /* private fields */
}

Expand description

Keyboard state for the current frame.

Fields§

§pressed_this_frame: Vec<KeyCode>

Keys pressed this frame.

§released_this_frame: Vec<KeyCode>

Keys released this frame.

Implementations§

Source §

impl KeyboardState

Source

pub fn is_down(&self, key: KeyCode) -> bool

Is the key currently held?

Source

pub fn is_pressed(&self, key: KeyCode) -> bool

Was the key pressed this frame (down-edge)?

Examples found in repository ?

examples/particles.rs (line 67)

49    fn update(&mut self, ctx: &mut Context) {
50        let dt = ctx.time.delta() as f32;
51
52        // Move fire emitter to mouse X
53        self.emitters[0].position.x = ctx.input.mouse.position.x;
54        self.emitters[0].position.y = ctx.screen_height() - 50.0;
55
56        // Burst on click
57        if ctx.input.mouse.is_pressed(MouseButton::Left) {
58            self.emitters[1].position = ctx.input.mouse.position;
59            self.emitters[1].burst_now(50);
60        }
61
62        // Update all emitters
63        for emitter in &mut self.emitters {
64            emitter.update(dt);
65        }
66
67        if ctx.input.keyboard.is_pressed(KeyCode::Escape) {
68            ctx.quit();
69        }
70    }

More examples

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examples/scene_demo.rs (line 35)

34    fn update(&mut self, ctx: &mut Context) {
35        if ctx.input.keyboard.is_pressed(KeyCode::Up) || ctx.input.keyboard.is_pressed(KeyCode::W) {
36            self.selected = self.selected.saturating_sub(1);
37        }
38        if ctx.input.keyboard.is_pressed(KeyCode::Down) || ctx.input.keyboard.is_pressed(KeyCode::S) {
39            self.selected = (self.selected + 1).min(self.options.len() - 1);
40        }
41        if ctx.input.keyboard.is_pressed(KeyCode::Enter) {
42            match self.selected {
43                0 => {
44                    // Transition to game scene
45                    let _transition = Transition::Fade {
46                        duration: 0.5,
47                        color: [0.0, 0.0, 0.0, 1.0],
48                    };
49                    // ctx.scene.push_with_transition(GameScene::new(), transition);
50                }
51                2 => {
52                    ctx.quit();
53                }
54                _ => {}
55            }
56        }
57    }

examples/basics.rs (line 102)

44    fn update(&mut self, ctx: &mut Context) {
45        let dt = ctx.time.delta() as f32;
46
47        // --- Ball physics ---
48        self.ball.velocity.y += 600.0 * dt; // Gravity
49        self.ball.position += self.ball.velocity * dt;
50
51        // Bounce off walls
52        let w = ctx.screen_width();
53        let h = ctx.screen_height();
54
55        if self.ball.position.x - self.ball.radius < 0.0 {
56            self.ball.position.x = self.ball.radius;
57            self.ball.velocity.x = self.ball.velocity.x.abs();
58        }
59        if self.ball.position.x + self.ball.radius > w {
60            self.ball.position.x = w - self.ball.radius;
61            self.ball.velocity.x = -self.ball.velocity.x.abs();
62        }
63        if self.ball.position.y - self.ball.radius < 0.0 {
64            self.ball.position.y = self.ball.radius;
65            self.ball.velocity.y = self.ball.velocity.y.abs();
66        }
67        if self.ball.position.y + self.ball.radius > h {
68            self.ball.position.y = h - self.ball.radius;
69            self.ball.velocity.y = -self.ball.velocity.y.abs() * 0.95; // Damping
70        }
71
72        // Update trail
73        self.ball.trail.push((self.ball.position, 1.0));
74        if self.ball.trail.len() > 60 {
75            self.ball.trail.remove(0);
76        }
77        for (_, alpha) in &mut self.ball.trail {
78            *alpha -= dt * 2.0;
79        }
80        self.ball.trail.retain(|(_, a)| *a > 0.0);
81
82        // --- Input ---
83        if ctx.input.is_action_pressed("shake") {
84            ctx.graphics.camera.shake(10.0, 0.3);
85        }
86
87        if ctx.input.mouse.is_pressed(MouseButton::Left) {
88            self.click_count += 1;
89            // Change ball color
90            self.hue = (self.hue + 30.0) % 360.0;
91            self.ball.color = Color::from_hsla(self.hue, 0.8, 0.6, 1.0);
92            // Boost ball toward click
93            let dir = ctx.input.mouse.position - self.ball.position;
94            self.ball.velocity += dir.normalize_or_zero() * 200.0;
95        }
96
97        // Zoom with scroll
98        let zoom = ctx.graphics.camera.zoom + ctx.input.mouse.scroll.y * 0.1;
99        ctx.graphics.camera.set_zoom(zoom);
100
101        // Escape to quit
102        if ctx.input.keyboard.is_pressed(KeyCode::Escape) {
103            ctx.quit();
104        }
105
106        // Update camera follow target
107        ctx.graphics.camera.follow(self.ball.position, 0.05);
108    }