Enum Event

#[non_exhaustive]
pub enum Event {
    Begin {
        serial: u32,
        time: u32,
        surface: WlSurface,
        fingers: u32,
    },
    Update {
        time: u32,
        dx: f64,
        dy: f64,
    },
    End {
        serial: u32,
        time: u32,
        cancelled: i32,
    },
}

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Begin

multi-finger swipe begin

This event is sent when a multi-finger swipe gesture is detected on the device.

Fields

serial: u32

time: u32

timestamp with millisecond granularity

surface: WlSurface

fingers: u32

number of fingers

Update

multi-finger swipe motion

This event is sent when a multi-finger swipe gesture changes the position of the logical center.

The dx and dy coordinates are relative coordinates of the logical center of the gesture compared to the previous event.

Fields

time: u32

timestamp with millisecond granularity

dx: f64

delta x coordinate in surface coordinate space

dy: f64

delta y coordinate in surface coordinate space

End

multi-finger swipe end

This event is sent when a multi-finger swipe gesture ceases to be valid. This may happen when one or more fingers are lifted or the gesture is cancelled.

When a gesture is cancelled, the client should undo state changes caused by this gesture. What causes a gesture to be cancelled is implementation-dependent.

Fields

serial: u32

time: u32

timestamp with millisecond granularity

cancelled: i32

1 if the gesture was cancelled, 0 otherwise

Implementations

impl Event

pub fn opcode(&self) -> u16

Get the opcode number of this message

Trait Implementations

impl Debug for Event

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

Formats the value using the given formatter.