Struct LinuxTouchEventParser 

pub struct LinuxTouchEventParser { /* private fields */ }

A state machine accepts uapi::input_event, produces fir::InputReport when (Touch Event.. + Sync Event) received.

This parser currently only supports “Type B” protocol in: https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.txt

Each event report contains a sequence of packets (uapi::input_event). EV_EYN means the report is completed.

There may be multiple contacts inside the sequence of packets, each contact data started by a MT_SLOT event with slot_id.

In the initiated contact, slot (X) will include a ABS_MT_TRACKING_ID event. In following events in slot (X) will continue use the same TRACKING_ID. Slot (X) with TRACKING_ID (-1) means the contact is lifted.

Warning output, clean state and return errno when received events:

• unknown events type / code.
• “Type A” events: SYN_MT_REPORT.
• invalid event.
• not follow “Type B” pattern.

Implementations

impl LinuxTouchEventParser

pub fn create() -> Self

Create the LinuxTouchEventParser.

pub fn handle(&mut self, e: input_event) -> Result<Option<InputReport>, Errno>

Handle received input_event, only produce event when SYN_REPORT is received.

Trait Implementations

impl Debug for LinuxTouchEventParser

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

Formats the value using the given formatter.

impl Default for LinuxTouchEventParser

fn default() -> LinuxTouchEventParser

Returns the “default value” for a type.

impl PartialEq for LinuxTouchEventParser

fn eq(&self, other: &LinuxTouchEventParser) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for LinuxTouchEventParser