Struct MultiTouchInfo 

pub struct MultiTouchInfo {
    pub device_id: TouchDeviceId,
    pub num_touches: usize,
    pub zoom_delta: f32,
    pub rotation_delta: f32,
    pub translation_delta: Point,
    pub force: f32,
    pub center_pos: Point,
}

Gesture aggregate for the current frame, produced when two or more fingers are on the same device. All deltas are relative to the previous frame’s positions — the widget just accumulates them into its own angle / scale / translation state (see LionView for the canonical consumer).

Fields

device_id: TouchDeviceId

Device that owns these touches. Useful only when the host actually distinguishes multiple touchscreens; most apps ignore.

num_touches: usize

Number of fingers currently down (always ≥ 2 — a single-finger frame produces None instead of a MultiTouchInfo).

zoom_delta: f32

Multiplicative zoom factor since the last frame. 1.0 means “no pinch this frame”; 1.1 means the fingers spread by 10 %.

rotation_delta: f32

Rotation in radians since the last frame. Positive = CCW in widget-local (Y-up) space, i.e. visually counter-clockwise on screen.

translation_delta: Point

Translation of the centroid since the last frame, in widget- local pixels. Widgets that want the gesture to orbit the pinch centre should combine this with zoom_delta / rotation_delta.

force: f32

Average force across active touches, or 0.0 when the platform doesn’t report pressure.

center_pos: Point

Centroid of the active touches in app-local coordinates this frame. Widgets that want to hit-test “is the gesture over me?” compare this against their own absolute bounds.

Trait Implementations

impl Clone for MultiTouchInfo

fn clone(&self) -> MultiTouchInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MultiTouchInfo

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

Formats the value using the given formatter.

impl Copy for MultiTouchInfo