Trait GesturePinchEventTrait

pub trait GesturePinchEventTrait: AsRaw<libinput_event_gesture> + Context {
    // Provided methods
    fn scale(&self) -> f64 { ... }
    fn into_gesture_pinch_event(self) -> GesturePinchEvent
       where Self: Sized { ... }
}

Common functions for pinch gesture events

Provided Methods

fn scale(&self) -> f64

Return the absolute scale of a pinch gesture, the scale is the division of the current distance between the fingers and the distance at the start of the gesture.

The scale begins at 1.0, and if e.g. the fingers moved together by 50% then the scale will become 0.5, if they move twice as far apart as initially the scale becomes 2.0, etc.

For gesture events that are of type GesturePinchBeginEvent, this function returns 1.0. For gesture events that are of type GesturePinchEndEvent, this function returns the scale value of the most recent GesturePinchUpdateEvent event (if any) or 1.0 otherwise.

fn into_gesture_pinch_event(self) -> GesturePinchEvent

where Self: Sized,

Convert into a general GesturePinchEvent

Implementors

impl GesturePinchEventTrait for GesturePinchEvent

impl GesturePinchEventTrait for GesturePinchBeginEvent

impl GesturePinchEventTrait for GesturePinchEndEvent

impl GesturePinchEventTrait for GesturePinchUpdateEvent