Trait input::event::gesture::GesturePinchEventTrait

source · 
pub trait GesturePinchEventTrait: AsRaw<libinput_event_gesture> + Context {
    fn scale(&self) -> f64 { ... }
    fn into_gesture_pinch_event(self) -> GesturePinchEvent
    where
        Self: Sized,
    { ... }
}
Expand description

Common functions for pinch gesture events

Provided Methods

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.

Convert into a general GesturePinchEvent

Implementors