Enum ElementState

pub enum ElementState {
    Pressed,
    Released,
}

Describes the input state of a key.

Variants

Pressed

Released

Implementations

impl ElementState

pub fn is_pressed(self) -> bool

True if self == Pressed.

Examples found in repository

examples/window.rs (line 367)

    fn window_event(
        &mut self,
        event_loop: &ActiveEventLoop,
        window_id: WindowId,
        event: WindowEvent,
    ) {
        let window = match self.windows.get_mut(&window_id) {
            Some(window) => window,
            None => return,
        };

        match event {
            WindowEvent::Resized(size) => {
                window.resize(size);
            },
            WindowEvent::Focused(focused) => {
                if focused {
                    info!("Window={window_id:?} focused");
                } else {
                    info!("Window={window_id:?} unfocused");
                }
            },
            WindowEvent::ScaleFactorChanged { scale_factor, .. } => {
                info!("Window={window_id:?} changed scale to {scale_factor}");
            },
            WindowEvent::ThemeChanged(theme) => {
                info!("Theme changed to {theme:?}");
                window.set_theme(theme);
            },
            WindowEvent::RedrawRequested => {
                if let Err(err) = window.draw() {
                    error!("Error drawing window: {err}");
                }
            },
            WindowEvent::Occluded(occluded) => {
                window.set_occluded(occluded);
            },
            WindowEvent::CloseRequested => {
                info!("Closing Window={window_id:?}");
                self.windows.remove(&window_id);
            },
            WindowEvent::ModifiersChanged(modifiers) => {
                window.modifiers = modifiers.state();
                info!("Modifiers changed to {:?}", window.modifiers);
            },
            WindowEvent::MouseWheel { delta, .. } => match delta {
                MouseScrollDelta::LineDelta(x, y) => {
                    info!("Mouse wheel Line Delta: ({x},{y})");
                },
                MouseScrollDelta::PixelDelta(px) => {
                    info!("Mouse wheel Pixel Delta: ({},{})", px.x, px.y);
                },
            },
            WindowEvent::KeyboardInput { event, is_synthetic: false, .. } => {
                let mods = window.modifiers;

                // Dispatch actions only on press.
                if event.state.is_pressed() {
                    let action = if let Key::Character(ch) = event.logical_key.as_ref() {
                        Self::process_key_binding(&ch.to_uppercase(), &mods)
                    } else {
                        None
                    };

                    if let Some(action) = action {
                        self.handle_action(event_loop, window_id, action);
                    }
                }
            },
            WindowEvent::MouseInput { button, state, .. } => {
                let mods = window.modifiers;
                if let Some(action) =
                    state.is_pressed().then(|| Self::process_mouse_binding(button, &mods)).flatten()
                {
                    self.handle_action(event_loop, window_id, action);
                }
            },
            WindowEvent::CursorLeft { .. } => {
                info!("Cursor left Window={window_id:?}");
                window.cursor_left();
            },
            WindowEvent::CursorMoved { position, .. } => {
                info!("Moved cursor to {position:?}");
                window.cursor_moved(position);
            },
            WindowEvent::ActivationTokenDone { token: _token, .. } => {
                #[cfg(any(x11_platform, wayland_platform))]
                {
                    startup_notify::set_activation_token_env(_token);
                    if let Err(err) = self.create_window(event_loop, None) {
                        error!("Error creating new window: {err}");
                    }
                }
            },
            WindowEvent::Ime(event) => match event {
                Ime::Enabled => info!("IME enabled for Window={window_id:?}"),
                Ime::Preedit(text, caret_pos) => {
                    info!("Preedit: {}, with caret at {:?}", text, caret_pos);
                },
                Ime::Commit(text) => {
                    info!("Committed: {}", text);
                },
                Ime::Disabled => info!("IME disabled for Window={window_id:?}"),
            },
            WindowEvent::PinchGesture { delta, .. } => {
                window.zoom += delta;
                let zoom = window.zoom;
                if delta > 0.0 {
                    info!("Zoomed in {delta:.5} (now: {zoom:.5})");
                } else {
                    info!("Zoomed out {delta:.5} (now: {zoom:.5})");
                }
            },
            WindowEvent::RotationGesture { delta, .. } => {
                window.rotated += delta;
                let rotated = window.rotated;
                if delta > 0.0 {
                    info!("Rotated counterclockwise {delta:.5} (now: {rotated:.5})");
                } else {
                    info!("Rotated clockwise {delta:.5} (now: {rotated:.5})");
                }
            },
            WindowEvent::PanGesture { delta, phase, .. } => {
                window.panned.x += delta.x;
                window.panned.y += delta.y;
                info!("Panned ({delta:?})) (now: {:?}), {phase:?}", window.panned);
            },
            WindowEvent::DoubleTapGesture { .. } => {
                info!("Smart zoom");
            },
            WindowEvent::TouchpadPressure { .. }
            | WindowEvent::HoveredFileCancelled
            | WindowEvent::KeyboardInput { .. }
            | WindowEvent::CursorEntered { .. }
            | WindowEvent::AxisMotion { .. }
            | WindowEvent::DroppedFile(_)
            | WindowEvent::HoveredFile(_)
            | WindowEvent::Destroyed
            | WindowEvent::Touch(_)
            | WindowEvent::Moved(_) => (),
        }
    }

Trait Implementations

impl Clone for ElementState

fn clone(&self) -> ElementState

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ElementState

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ElementState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for ElementState

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ElementState

fn eq(&self, other: &ElementState) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ElementState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ElementState

impl Eq for ElementState

impl StructuralPartialEq for ElementState