Enum Event

#[non_exhaustive]
pub enum Event<'a> {
    Delta {
        value120: i32,
    },
    Frame {
        time: u32,
    },
}

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.

Delta

delta movement

Sent whenever the position on a dial changes.

This event carries the wheel delta as multiples or fractions of 120 with each multiple of 120 representing one logical wheel detent. For example, an axis_value120 of 30 is one quarter of a logical wheel step in the positive direction, a value120 of -240 are two logical wheel steps in the negative direction within the same hardware event. See the wl_pointer.axis_value120 for more details.

The value120 must not be zero.

Fields

value120: i32

rotation distance as fraction of 120

Frame

end of a dial event sequence

Indicates the end of a set of events that represent one logical hardware dial event. A client is expected to accumulate the data in all events within the frame before proceeding.

All wp_tablet_pad_dial events before a wp_tablet_pad_dial.frame event belong logically together.

A wp_tablet_pad_dial.frame event is sent for every logical event group, even if the group only contains a single wp_tablet_pad_dial event. Specifically, a client may get a sequence: delta, frame, delta, frame, etc.

Fields

time: u32

timestamp with millisecond granularity

Implementations

impl<'a> Event<'a>

pub fn opcode(&self) -> u16

Get the opcode number of this message

Trait Implementations

impl<'a> Debug for Event<'a>

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

Formats the value using the given formatter.