Trait DeviceWrapper

pub trait DeviceWrapper: Sized {
    // Required method
    fn raw(&self) -> *mut libevdev;

    // Provided methods
    fn enable<E: Enable>(&self, e: E) -> Result<()> { ... }
    fn enable_property(&self, prop: &InputProp) -> Result<()> { ... }
    fn enable_event_type(&self, ev_type: &EventType) -> Result<()> { ... }
    fn enable_event_code(
        &self,
        ev_code: &EventCode,
        data: Option<EnableCodeData>,
    ) -> Result<()> { ... }
    fn disable<E: Enable>(&self, d: E) -> Result<()> { ... }
    fn disable_event_type(&self, ev_type: &EventType) -> Result<()> { ... }
    fn disable_event_code(&self, code: &EventCode) -> Result<()> { ... }
    fn has<E: Enable>(&self, e: E) -> bool { ... }
    fn has_property(&self, prop: &InputProp) -> bool { ... }
    fn has_event_type(&self, ev_type: &EventType) -> bool { ... }
    fn has_event_code(&self, code: &EventCode) -> bool { ... }
    fn name(&self) -> Option<&str> { ... }
    fn phys(&self) -> Option<&str> { ... }
    fn uniq(&self) -> Option<&str> { ... }
    fn set_name(&self, field: &str) { ... }
    fn set_phys(&self, field: &str) { ... }
    fn set_uniq(&self, field: &str) { ... }
    fn product_id(&self) -> u16 { ... }
    fn vendor_id(&self) -> u16 { ... }
    fn bustype(&self) -> u16 { ... }
    fn version(&self) -> u16 { ... }
    fn set_product_id(&self, field: u16) { ... }
    fn set_vendor_id(&self, field: u16) { ... }
    fn set_bustype(&self, field: u16) { ... }
    fn set_version(&self, field: u16) { ... }
    fn abs_info(&self, code: &EventCode) -> Option<AbsInfo> { ... }
    fn set_abs_info(&self, code: &EventCode, absinfo: &AbsInfo) { ... }
    fn event_value(&self, code: &EventCode) -> Option<i32> { ... }
    fn set_event_value(&self, code: &EventCode, val: i32) -> Result<()> { ... }
    fn abs_minimum(&self, code: u32) -> Result<i32> { ... }
    fn abs_maximum(&self, code: u32) -> Result<i32> { ... }
    fn abs_fuzz(&self, code: u32) -> Result<i32> { ... }
    fn abs_flat(&self, code: u32) -> Result<i32> { ... }
    fn abs_resolution(&self, code: u32) -> Result<i32> { ... }
    fn set_abs_minimum(&self, code: u32, val: i32) { ... }
    fn set_abs_maximum(&self, code: u32, val: i32) { ... }
    fn set_abs_fuzz(&self, code: u32, val: i32) { ... }
    fn set_abs_flat(&self, code: u32, val: i32) { ... }
    fn set_abs_resolution(&self, code: u32, val: i32) { ... }
    fn slot_value(&self, slot: u32, code: &EventCode) -> Option<i32> { ... }
    fn set_slot_value(
        &self,
        slot: u32,
        code: &EventCode,
        val: i32,
    ) -> Result<()> { ... }
    fn num_slots(&self) -> Option<i32> { ... }
    fn current_slot(&self) -> Option<i32> { ... }
}

Abstraction over structs which contain an inner *mut libevdev

Required Methods

fn raw(&self) -> *mut libevdev

Provided Methods

fn enable<E: Enable>(&self, e: E) -> Result<()>

Forcibly enable an EventType/InputProp on this device, even if the underlying device does not support it. While this cannot make the device actually report such events, it will now return true for has().

This is a local modification only affecting only this representation of this device.

Examples found in repository

examples/vmouse.rs (line 47)

fn main() -> Result<(), std::io::Error> {
    // Parse command line arguments
    let mut args = std::env::args();

    if args.len() != 2 {
        let n = args.nth(0).unwrap();
        println!("Usage: `{} DEVICE`, eg. `{} /dev/input/event13`", n, n);
        std::process::exit(1);
    }

    let device = &args.nth(1).unwrap();

    // Connect to real keyboard
    let f = File::open(device)?;
    let d = Device::new_from_file(f)?;

    if let Some(n) = d.name() {
        println!(
            "Connected to device: '{}' ({:04x}:{:04x})",
            n,
            d.vendor_id(),
            d.product_id()
        );
    }

    // Create virtual device
    let u = UninitDevice::new().unwrap();

    // Setup device
    // per: https://01.org/linuxgraphics/gfx-docs/drm/input/uinput.html#mouse-movements

    u.set_name("Virtual Mouse");
    u.set_bustype(BusType::BUS_USB as u16);
    u.set_vendor_id(0xabcd);
    u.set_product_id(0xefef);

    // Note mouse keys have to be enabled for this to be detected
    // as a usable device, see: https://stackoverflow.com/a/64559658/6074942
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_LEFT))?;
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_RIGHT))?;

    u.enable(EventCode::EV_REL(EV_REL::REL_X))?;
    u.enable(EventCode::EV_REL(EV_REL::REL_Y))?;

    u.enable(EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;

    // Attempt to create UInputDevice from UninitDevice
    let v = UInputDevice::create_from_device(&u)?;

    loop {
        // Fetch keyboard events
        let (_status, event) = d.next_event(ReadFlag::NORMAL | ReadFlag::BLOCKING)?;

        // Map these to mouse events
        println!("Event: {:?}", event);

        // Map direction keys to mouse events
        let e = match event.event_code {
            EventCode::EV_KEY(EV_KEY::KEY_RIGHT) => Some((EV_REL::REL_X, MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_LEFT) => Some((EV_REL::REL_X, -MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_UP) => Some((EV_REL::REL_Y, -MOUSE_STEP_Y)),
            EventCode::EV_KEY(EV_KEY::KEY_DOWN) => Some((EV_REL::REL_Y, MOUSE_STEP_Y)),
            _ => None,
        };

        // Write mapped event
        if let Some((e, n)) = e {
            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_REL(e),
                value: n,
            })?;

            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_SYN(EV_SYN::SYN_REPORT),
                value: 0,
            })?;
        }
    }
}

fn enable_property(&self, prop: &InputProp) -> Result<()>

Enables this property, a call to set_file will overwrite any previously set values

Note: Please use the enable function instead. This function is only available for the sake of maintaining compatibility with libevdev.

fn enable_event_type(&self, ev_type: &EventType) -> Result<()>

Forcibly enable an event type on this device, even if the underlying device does not support it. While this cannot make the device actually report such events, it will now return true for libevdev_has_event_type().

This is a local modification only affecting only this representation of this device.

Note: Please use the enable function instead. This function is only available for the sake of maintaining compatibility with libevdev.

fn enable_event_code( &self, ev_code: &EventCode, data: Option<EnableCodeData>, ) -> Result<()>

Forcibly enable an event type on this device, even if the underlying device does not support it. While this cannot make the device actually report such events, it will now return true for libevdev_has_event_code().

The last argument depends on the type and code: If type is EV_ABS, data must be a pointer to a struct input_absinfo containing the data for this axis. If type is EV_REP, data must be a pointer to a int containing the data for this axis. For all other types, the argument must be None.

Note: Please use the enable function instead. This function is only available for the sake of maintaining compatibility with libevdev.

fn disable<E: Enable>(&self, d: E) -> Result<()>

Forcibly disable an EventType/EventCode on this device, even if the underlying device provides it. This effectively mutes the respective set of events. has() will return false for this EventType/EventCode

In most cases, a caller likely only wants to disable a single code, not the whole type.

Disabling EV_SYN will not work. In Peter’s Words “Don’t shoot yourself in the foot. It hurts”.

This is a local modification only affecting only this representation of this device.

fn disable_event_type(&self, ev_type: &EventType) -> Result<()>

Forcibly disable an event type on this device, even if the underlying device provides it. This effectively mutes the respective set of events. libevdev will filter any events matching this type and none will reach the caller. libevdev_has_event_type() will return false for this type.

In most cases, a caller likely only wants to disable a single code, not the whole type. Use disable_event_code for that.

Disabling EV_SYN will not work. In Peter’s Words “Don’t shoot yourself in the foot. It hurts”.

This is a local modification only affecting only this representation of this device.

Note: Please use the disable function instead. This function is only available for the sake of maintaining compatibility with libevdev.

fn disable_event_code(&self, code: &EventCode) -> Result<()>

Forcibly disable an event code on this device, even if the underlying device provides it. This effectively mutes the respective set of events. libevdev will filter any events matching this type and code and none will reach the caller. has_event_code will return false for this code.

Disabling all event codes for a given type will not disable the event type. Use disable_event_type for that.

This is a local modification only affecting only this representation of this device.

Disabling codes of type EV_SYN will not work. Don’t shoot yourself in the foot. It hurts.

Note: Please use the disable function instead. This function is only available for the sake of maintaining compatibility with libevdev.

fn has<E: Enable>(&self, e: E) -> bool

Returns true if device support the InputProp/EventType/EventCode and false otherwise

Examples found in repository

examples/evtest.rs (line 16)

fn print_abs_bits(dev: &Device, axis: &EV_ABS) {
    let code = EventCode::EV_ABS(axis.clone());

    if !dev.has(code) {
        return;
    }

    let abs = dev.abs_info(&code).unwrap();

    println!("\tValue\t{}", abs.value);
    println!("\tMin\t{}", abs.minimum);
    println!("\tMax\t{}", abs.maximum);
    if abs.fuzz != 0 {
        println!("\tFuzz\t{}", abs.fuzz);
    }
    if abs.flat != 0 {
        println!("\tFlat\t{}", abs.flat);
    }
    if abs.resolution != 0 {
        println!("\tResolution\t{}", abs.resolution);
    }
}

fn print_code_bits(dev: &Device, ev_type: &EventType) {
    for code in EventCodeIterator::new(ev_type) {
        if !dev.has(code) {
            continue;
        }

        println!("    Event code: {}", code);
        match code {
            EventCode::EV_ABS(k) => print_abs_bits(dev, &k),
            _ => (),
        }
    }
}

fn print_bits(dev: &Device) {
    println!("Supported events:");

    for ev_type in EventTypeIterator::new() {
        if dev.has(ev_type) {
            println!("  Event type: {} ", ev_type);
        }

        match ev_type {
            EventType::EV_KEY
            | EventType::EV_REL
            | EventType::EV_ABS
            | EventType::EV_LED => print_code_bits(dev, &ev_type),
            _ => (),
        }
    }
}

fn has_property(&self, prop: &InputProp) -> bool

Returns true if device support the property and false otherwise

Note: Please use the has function instead. This function is only available for the sake of maintaining compatibility with libevdev.

Examples found in repository

examples/evtest.rs (line 72)

fn print_props(dev: &Device) {
    println!("Properties:");

    for input_prop in InputPropIterator::new() {
        if dev.has_property(&input_prop) {
            println!("  Property type: {}", input_prop);
        }
    }
}

fn has_event_type(&self, ev_type: &EventType) -> bool

Returns true is the device support this event type and false otherwise

Note: Please use the has function instead. This function is only available for the sake of maintaining compatibility with libevdev.

fn has_event_code(&self, code: &EventCode) -> bool

Return true is the device support this event type and code and false otherwise

Note: Please use the has function instead. This function is only available for the sake of maintaining compatibility with libevdev.

fn name(&self) -> Option<&str>

Get device’s name, as set by the kernel, or overridden by a call to set_name

Examples found in repository

examples/evtest.rs (line 135)

fn main() {
    let mut args = std::env::args();

    if args.len() != 2 {
        usage();
        std::process::exit(1);
    }

    let path = &args.nth(1).unwrap();
    let mut file = OpenOptions::new()
        .read(true)
        .write(true)
        .custom_flags(libc::O_NONBLOCK)
        .open(path)
        .unwrap();
    let mut buffer = Vec::new();
    let result = file.read_to_end(&mut buffer);
    if result.is_ok() || result.unwrap_err().kind() != ErrorKind::WouldBlock {
        println!("Failed to drain pending events from device file");
    }

    let u_d = UninitDevice::new().unwrap();
    let d = u_d.set_file(file).unwrap();

    println!(
        "Input device ID: bus 0x{:x} vendor 0x{:x} product 0x{:x}",
        d.bustype(),
        d.vendor_id(),
        d.product_id()
    );
    println!("Evdev version: {:x}", d.driver_version());
    println!("Input device name: \"{}\"", d.name().unwrap_or(""));
    println!("Phys location: {}", d.phys().unwrap_or(""));
    println!("Uniq identifier: {}", d.uniq().unwrap_or(""));

    print_bits(&d);
    print_props(&d);

    let mut a: io::Result<(ReadStatus, InputEvent)>;
    loop {
        a = d.next_event(ReadFlag::NORMAL);
        if a.is_ok() {
            let mut result = a.ok().unwrap();
            match result.0 {
                ReadStatus::Sync => {
                    println!("::::::::::::::::::::: dropped ::::::::::::::::::::::");
                    while result.0 == ReadStatus::Sync {
                        print_sync_dropped_event(&result.1);
                        a = d.next_event(ReadFlag::SYNC);
                        if a.is_ok() {
                            result = a.ok().unwrap();
                        } else {
                            break;
                        }
                    }
                    println!("::::::::::::::::::::: re-synced ::::::::::::::::::::");
                }
                ReadStatus::Success => print_event(&result.1),
            }
        } else {
            let err = a.err().unwrap();
            match err.raw_os_error() {
                Some(libc::EAGAIN) => continue,
                _ => {
                    println!("{}", err);
                    break;
                }
            }
        }
    }
}

examples/vmouse.rs (line 25)

fn main() -> Result<(), std::io::Error> {
    // Parse command line arguments
    let mut args = std::env::args();

    if args.len() != 2 {
        let n = args.nth(0).unwrap();
        println!("Usage: `{} DEVICE`, eg. `{} /dev/input/event13`", n, n);
        std::process::exit(1);
    }

    let device = &args.nth(1).unwrap();

    // Connect to real keyboard
    let f = File::open(device)?;
    let d = Device::new_from_file(f)?;

    if let Some(n) = d.name() {
        println!(
            "Connected to device: '{}' ({:04x}:{:04x})",
            n,
            d.vendor_id(),
            d.product_id()
        );
    }

    // Create virtual device
    let u = UninitDevice::new().unwrap();

    // Setup device
    // per: https://01.org/linuxgraphics/gfx-docs/drm/input/uinput.html#mouse-movements

    u.set_name("Virtual Mouse");
    u.set_bustype(BusType::BUS_USB as u16);
    u.set_vendor_id(0xabcd);
    u.set_product_id(0xefef);

    // Note mouse keys have to be enabled for this to be detected
    // as a usable device, see: https://stackoverflow.com/a/64559658/6074942
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_LEFT))?;
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_RIGHT))?;

    u.enable(EventCode::EV_REL(EV_REL::REL_X))?;
    u.enable(EventCode::EV_REL(EV_REL::REL_Y))?;

    u.enable(EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;

    // Attempt to create UInputDevice from UninitDevice
    let v = UInputDevice::create_from_device(&u)?;

    loop {
        // Fetch keyboard events
        let (_status, event) = d.next_event(ReadFlag::NORMAL | ReadFlag::BLOCKING)?;

        // Map these to mouse events
        println!("Event: {:?}", event);

        // Map direction keys to mouse events
        let e = match event.event_code {
            EventCode::EV_KEY(EV_KEY::KEY_RIGHT) => Some((EV_REL::REL_X, MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_LEFT) => Some((EV_REL::REL_X, -MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_UP) => Some((EV_REL::REL_Y, -MOUSE_STEP_Y)),
            EventCode::EV_KEY(EV_KEY::KEY_DOWN) => Some((EV_REL::REL_Y, MOUSE_STEP_Y)),
            _ => None,
        };

        // Write mapped event
        if let Some((e, n)) = e {
            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_REL(e),
                value: n,
            })?;

            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_SYN(EV_SYN::SYN_REPORT),
                value: 0,
            })?;
        }
    }
}

fn phys(&self) -> Option<&str>

Get device’s physical location, as set by the kernel, or overridden by a call to set_phys

Examples found in repository

examples/evtest.rs (line 136)

fn main() {
    let mut args = std::env::args();

    if args.len() != 2 {
        usage();
        std::process::exit(1);
    }

    let path = &args.nth(1).unwrap();
    let mut file = OpenOptions::new()
        .read(true)
        .write(true)
        .custom_flags(libc::O_NONBLOCK)
        .open(path)
        .unwrap();
    let mut buffer = Vec::new();
    let result = file.read_to_end(&mut buffer);
    if result.is_ok() || result.unwrap_err().kind() != ErrorKind::WouldBlock {
        println!("Failed to drain pending events from device file");
    }

    let u_d = UninitDevice::new().unwrap();
    let d = u_d.set_file(file).unwrap();

    println!(
        "Input device ID: bus 0x{:x} vendor 0x{:x} product 0x{:x}",
        d.bustype(),
        d.vendor_id(),
        d.product_id()
    );
    println!("Evdev version: {:x}", d.driver_version());
    println!("Input device name: \"{}\"", d.name().unwrap_or(""));
    println!("Phys location: {}", d.phys().unwrap_or(""));
    println!("Uniq identifier: {}", d.uniq().unwrap_or(""));

    print_bits(&d);
    print_props(&d);

    let mut a: io::Result<(ReadStatus, InputEvent)>;
    loop {
        a = d.next_event(ReadFlag::NORMAL);
        if a.is_ok() {
            let mut result = a.ok().unwrap();
            match result.0 {
                ReadStatus::Sync => {
                    println!("::::::::::::::::::::: dropped ::::::::::::::::::::::");
                    while result.0 == ReadStatus::Sync {
                        print_sync_dropped_event(&result.1);
                        a = d.next_event(ReadFlag::SYNC);
                        if a.is_ok() {
                            result = a.ok().unwrap();
                        } else {
                            break;
                        }
                    }
                    println!("::::::::::::::::::::: re-synced ::::::::::::::::::::");
                }
                ReadStatus::Success => print_event(&result.1),
            }
        } else {
            let err = a.err().unwrap();
            match err.raw_os_error() {
                Some(libc::EAGAIN) => continue,
                _ => {
                    println!("{}", err);
                    break;
                }
            }
        }
    }
}

fn uniq(&self) -> Option<&str>

Get device’s unique identifier, as set by the kernel, or overridden by a call to set_uniq

Examples found in repository

examples/evtest.rs (line 137)

fn main() {
    let mut args = std::env::args();

    if args.len() != 2 {
        usage();
        std::process::exit(1);
    }

    let path = &args.nth(1).unwrap();
    let mut file = OpenOptions::new()
        .read(true)
        .write(true)
        .custom_flags(libc::O_NONBLOCK)
        .open(path)
        .unwrap();
    let mut buffer = Vec::new();
    let result = file.read_to_end(&mut buffer);
    if result.is_ok() || result.unwrap_err().kind() != ErrorKind::WouldBlock {
        println!("Failed to drain pending events from device file");
    }

    let u_d = UninitDevice::new().unwrap();
    let d = u_d.set_file(file).unwrap();

    println!(
        "Input device ID: bus 0x{:x} vendor 0x{:x} product 0x{:x}",
        d.bustype(),
        d.vendor_id(),
        d.product_id()
    );
    println!("Evdev version: {:x}", d.driver_version());
    println!("Input device name: \"{}\"", d.name().unwrap_or(""));
    println!("Phys location: {}", d.phys().unwrap_or(""));
    println!("Uniq identifier: {}", d.uniq().unwrap_or(""));

    print_bits(&d);
    print_props(&d);

    let mut a: io::Result<(ReadStatus, InputEvent)>;
    loop {
        a = d.next_event(ReadFlag::NORMAL);
        if a.is_ok() {
            let mut result = a.ok().unwrap();
            match result.0 {
                ReadStatus::Sync => {
                    println!("::::::::::::::::::::: dropped ::::::::::::::::::::::");
                    while result.0 == ReadStatus::Sync {
                        print_sync_dropped_event(&result.1);
                        a = d.next_event(ReadFlag::SYNC);
                        if a.is_ok() {
                            result = a.ok().unwrap();
                        } else {
                            break;
                        }
                    }
                    println!("::::::::::::::::::::: re-synced ::::::::::::::::::::");
                }
                ReadStatus::Success => print_event(&result.1),
            }
        } else {
            let err = a.err().unwrap();
            match err.raw_os_error() {
                Some(libc::EAGAIN) => continue,
                _ => {
                    println!("{}", err);
                    break;
                }
            }
        }
    }
}

fn set_name(&self, field: &str)

Examples found in repository

examples/vmouse.rs (line 40)

fn main() -> Result<(), std::io::Error> {
    // Parse command line arguments
    let mut args = std::env::args();

    if args.len() != 2 {
        let n = args.nth(0).unwrap();
        println!("Usage: `{} DEVICE`, eg. `{} /dev/input/event13`", n, n);
        std::process::exit(1);
    }

    let device = &args.nth(1).unwrap();

    // Connect to real keyboard
    let f = File::open(device)?;
    let d = Device::new_from_file(f)?;

    if let Some(n) = d.name() {
        println!(
            "Connected to device: '{}' ({:04x}:{:04x})",
            n,
            d.vendor_id(),
            d.product_id()
        );
    }

    // Create virtual device
    let u = UninitDevice::new().unwrap();

    // Setup device
    // per: https://01.org/linuxgraphics/gfx-docs/drm/input/uinput.html#mouse-movements

    u.set_name("Virtual Mouse");
    u.set_bustype(BusType::BUS_USB as u16);
    u.set_vendor_id(0xabcd);
    u.set_product_id(0xefef);

    // Note mouse keys have to be enabled for this to be detected
    // as a usable device, see: https://stackoverflow.com/a/64559658/6074942
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_LEFT))?;
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_RIGHT))?;

    u.enable(EventCode::EV_REL(EV_REL::REL_X))?;
    u.enable(EventCode::EV_REL(EV_REL::REL_Y))?;

    u.enable(EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;

    // Attempt to create UInputDevice from UninitDevice
    let v = UInputDevice::create_from_device(&u)?;

    loop {
        // Fetch keyboard events
        let (_status, event) = d.next_event(ReadFlag::NORMAL | ReadFlag::BLOCKING)?;

        // Map these to mouse events
        println!("Event: {:?}", event);

        // Map direction keys to mouse events
        let e = match event.event_code {
            EventCode::EV_KEY(EV_KEY::KEY_RIGHT) => Some((EV_REL::REL_X, MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_LEFT) => Some((EV_REL::REL_X, -MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_UP) => Some((EV_REL::REL_Y, -MOUSE_STEP_Y)),
            EventCode::EV_KEY(EV_KEY::KEY_DOWN) => Some((EV_REL::REL_Y, MOUSE_STEP_Y)),
            _ => None,
        };

        // Write mapped event
        if let Some((e, n)) = e {
            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_REL(e),
                value: n,
            })?;

            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_SYN(EV_SYN::SYN_REPORT),
                value: 0,
            })?;
        }
    }
}

fn set_phys(&self, field: &str)

fn set_uniq(&self, field: &str)

fn product_id(&self) -> u16

Examples found in repository

examples/evtest.rs (line 132)

fn main() {
    let mut args = std::env::args();

    if args.len() != 2 {
        usage();
        std::process::exit(1);
    }

    let path = &args.nth(1).unwrap();
    let mut file = OpenOptions::new()
        .read(true)
        .write(true)
        .custom_flags(libc::O_NONBLOCK)
        .open(path)
        .unwrap();
    let mut buffer = Vec::new();
    let result = file.read_to_end(&mut buffer);
    if result.is_ok() || result.unwrap_err().kind() != ErrorKind::WouldBlock {
        println!("Failed to drain pending events from device file");
    }

    let u_d = UninitDevice::new().unwrap();
    let d = u_d.set_file(file).unwrap();

    println!(
        "Input device ID: bus 0x{:x} vendor 0x{:x} product 0x{:x}",
        d.bustype(),
        d.vendor_id(),
        d.product_id()
    );
    println!("Evdev version: {:x}", d.driver_version());
    println!("Input device name: \"{}\"", d.name().unwrap_or(""));
    println!("Phys location: {}", d.phys().unwrap_or(""));
    println!("Uniq identifier: {}", d.uniq().unwrap_or(""));

    print_bits(&d);
    print_props(&d);

    let mut a: io::Result<(ReadStatus, InputEvent)>;
    loop {
        a = d.next_event(ReadFlag::NORMAL);
        if a.is_ok() {
            let mut result = a.ok().unwrap();
            match result.0 {
                ReadStatus::Sync => {
                    println!("::::::::::::::::::::: dropped ::::::::::::::::::::::");
                    while result.0 == ReadStatus::Sync {
                        print_sync_dropped_event(&result.1);
                        a = d.next_event(ReadFlag::SYNC);
                        if a.is_ok() {
                            result = a.ok().unwrap();
                        } else {
                            break;
                        }
                    }
                    println!("::::::::::::::::::::: re-synced ::::::::::::::::::::");
                }
                ReadStatus::Success => print_event(&result.1),
            }
        } else {
            let err = a.err().unwrap();
            match err.raw_os_error() {
                Some(libc::EAGAIN) => continue,
                _ => {
                    println!("{}", err);
                    break;
                }
            }
        }
    }
}

examples/vmouse.rs (line 30)

fn main() -> Result<(), std::io::Error> {
    // Parse command line arguments
    let mut args = std::env::args();

    if args.len() != 2 {
        let n = args.nth(0).unwrap();
        println!("Usage: `{} DEVICE`, eg. `{} /dev/input/event13`", n, n);
        std::process::exit(1);
    }

    let device = &args.nth(1).unwrap();

    // Connect to real keyboard
    let f = File::open(device)?;
    let d = Device::new_from_file(f)?;

    if let Some(n) = d.name() {
        println!(
            "Connected to device: '{}' ({:04x}:{:04x})",
            n,
            d.vendor_id(),
            d.product_id()
        );
    }

    // Create virtual device
    let u = UninitDevice::new().unwrap();

    // Setup device
    // per: https://01.org/linuxgraphics/gfx-docs/drm/input/uinput.html#mouse-movements

    u.set_name("Virtual Mouse");
    u.set_bustype(BusType::BUS_USB as u16);
    u.set_vendor_id(0xabcd);
    u.set_product_id(0xefef);

    // Note mouse keys have to be enabled for this to be detected
    // as a usable device, see: https://stackoverflow.com/a/64559658/6074942
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_LEFT))?;
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_RIGHT))?;

    u.enable(EventCode::EV_REL(EV_REL::REL_X))?;
    u.enable(EventCode::EV_REL(EV_REL::REL_Y))?;

    u.enable(EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;

    // Attempt to create UInputDevice from UninitDevice
    let v = UInputDevice::create_from_device(&u)?;

    loop {
        // Fetch keyboard events
        let (_status, event) = d.next_event(ReadFlag::NORMAL | ReadFlag::BLOCKING)?;

        // Map these to mouse events
        println!("Event: {:?}", event);

        // Map direction keys to mouse events
        let e = match event.event_code {
            EventCode::EV_KEY(EV_KEY::KEY_RIGHT) => Some((EV_REL::REL_X, MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_LEFT) => Some((EV_REL::REL_X, -MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_UP) => Some((EV_REL::REL_Y, -MOUSE_STEP_Y)),
            EventCode::EV_KEY(EV_KEY::KEY_DOWN) => Some((EV_REL::REL_Y, MOUSE_STEP_Y)),
            _ => None,
        };

        // Write mapped event
        if let Some((e, n)) = e {
            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_REL(e),
                value: n,
            })?;

            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_SYN(EV_SYN::SYN_REPORT),
                value: 0,
            })?;
        }
    }
}

fn vendor_id(&self) -> u16

Examples found in repository

examples/evtest.rs (line 131)

fn main() {
    let mut args = std::env::args();

    if args.len() != 2 {
        usage();
        std::process::exit(1);
    }

    let path = &args.nth(1).unwrap();
    let mut file = OpenOptions::new()
        .read(true)
        .write(true)
        .custom_flags(libc::O_NONBLOCK)
        .open(path)
        .unwrap();
    let mut buffer = Vec::new();
    let result = file.read_to_end(&mut buffer);
    if result.is_ok() || result.unwrap_err().kind() != ErrorKind::WouldBlock {
        println!("Failed to drain pending events from device file");
    }

    let u_d = UninitDevice::new().unwrap();
    let d = u_d.set_file(file).unwrap();

    println!(
        "Input device ID: bus 0x{:x} vendor 0x{:x} product 0x{:x}",
        d.bustype(),
        d.vendor_id(),
        d.product_id()
    );
    println!("Evdev version: {:x}", d.driver_version());
    println!("Input device name: \"{}\"", d.name().unwrap_or(""));
    println!("Phys location: {}", d.phys().unwrap_or(""));
    println!("Uniq identifier: {}", d.uniq().unwrap_or(""));

    print_bits(&d);
    print_props(&d);

    let mut a: io::Result<(ReadStatus, InputEvent)>;
    loop {
        a = d.next_event(ReadFlag::NORMAL);
        if a.is_ok() {
            let mut result = a.ok().unwrap();
            match result.0 {
                ReadStatus::Sync => {
                    println!("::::::::::::::::::::: dropped ::::::::::::::::::::::");
                    while result.0 == ReadStatus::Sync {
                        print_sync_dropped_event(&result.1);
                        a = d.next_event(ReadFlag::SYNC);
                        if a.is_ok() {
                            result = a.ok().unwrap();
                        } else {
                            break;
                        }
                    }
                    println!("::::::::::::::::::::: re-synced ::::::::::::::::::::");
                }
                ReadStatus::Success => print_event(&result.1),
            }
        } else {
            let err = a.err().unwrap();
            match err.raw_os_error() {
                Some(libc::EAGAIN) => continue,
                _ => {
                    println!("{}", err);
                    break;
                }
            }
        }
    }
}

examples/vmouse.rs (line 29)

fn main() -> Result<(), std::io::Error> {
    // Parse command line arguments
    let mut args = std::env::args();

    if args.len() != 2 {
        let n = args.nth(0).unwrap();
        println!("Usage: `{} DEVICE`, eg. `{} /dev/input/event13`", n, n);
        std::process::exit(1);
    }

    let device = &args.nth(1).unwrap();

    // Connect to real keyboard
    let f = File::open(device)?;
    let d = Device::new_from_file(f)?;

    if let Some(n) = d.name() {
        println!(
            "Connected to device: '{}' ({:04x}:{:04x})",
            n,
            d.vendor_id(),
            d.product_id()
        );
    }

    // Create virtual device
    let u = UninitDevice::new().unwrap();

    // Setup device
    // per: https://01.org/linuxgraphics/gfx-docs/drm/input/uinput.html#mouse-movements

    u.set_name("Virtual Mouse");
    u.set_bustype(BusType::BUS_USB as u16);
    u.set_vendor_id(0xabcd);
    u.set_product_id(0xefef);

    // Note mouse keys have to be enabled for this to be detected
    // as a usable device, see: https://stackoverflow.com/a/64559658/6074942
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_LEFT))?;
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_RIGHT))?;

    u.enable(EventCode::EV_REL(EV_REL::REL_X))?;
    u.enable(EventCode::EV_REL(EV_REL::REL_Y))?;

    u.enable(EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;

    // Attempt to create UInputDevice from UninitDevice
    let v = UInputDevice::create_from_device(&u)?;

    loop {
        // Fetch keyboard events
        let (_status, event) = d.next_event(ReadFlag::NORMAL | ReadFlag::BLOCKING)?;

        // Map these to mouse events
        println!("Event: {:?}", event);

        // Map direction keys to mouse events
        let e = match event.event_code {
            EventCode::EV_KEY(EV_KEY::KEY_RIGHT) => Some((EV_REL::REL_X, MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_LEFT) => Some((EV_REL::REL_X, -MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_UP) => Some((EV_REL::REL_Y, -MOUSE_STEP_Y)),
            EventCode::EV_KEY(EV_KEY::KEY_DOWN) => Some((EV_REL::REL_Y, MOUSE_STEP_Y)),
            _ => None,
        };

        // Write mapped event
        if let Some((e, n)) = e {
            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_REL(e),
                value: n,
            })?;

            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_SYN(EV_SYN::SYN_REPORT),
                value: 0,
            })?;
        }
    }
}

fn bustype(&self) -> u16

Examples found in repository

examples/evtest.rs (line 130)

fn main() {
    let mut args = std::env::args();

    if args.len() != 2 {
        usage();
        std::process::exit(1);
    }

    let path = &args.nth(1).unwrap();
    let mut file = OpenOptions::new()
        .read(true)
        .write(true)
        .custom_flags(libc::O_NONBLOCK)
        .open(path)
        .unwrap();
    let mut buffer = Vec::new();
    let result = file.read_to_end(&mut buffer);
    if result.is_ok() || result.unwrap_err().kind() != ErrorKind::WouldBlock {
        println!("Failed to drain pending events from device file");
    }

    let u_d = UninitDevice::new().unwrap();
    let d = u_d.set_file(file).unwrap();

    println!(
        "Input device ID: bus 0x{:x} vendor 0x{:x} product 0x{:x}",
        d.bustype(),
        d.vendor_id(),
        d.product_id()
    );
    println!("Evdev version: {:x}", d.driver_version());
    println!("Input device name: \"{}\"", d.name().unwrap_or(""));
    println!("Phys location: {}", d.phys().unwrap_or(""));
    println!("Uniq identifier: {}", d.uniq().unwrap_or(""));

    print_bits(&d);
    print_props(&d);

    let mut a: io::Result<(ReadStatus, InputEvent)>;
    loop {
        a = d.next_event(ReadFlag::NORMAL);
        if a.is_ok() {
            let mut result = a.ok().unwrap();
            match result.0 {
                ReadStatus::Sync => {
                    println!("::::::::::::::::::::: dropped ::::::::::::::::::::::");
                    while result.0 == ReadStatus::Sync {
                        print_sync_dropped_event(&result.1);
                        a = d.next_event(ReadFlag::SYNC);
                        if a.is_ok() {
                            result = a.ok().unwrap();
                        } else {
                            break;
                        }
                    }
                    println!("::::::::::::::::::::: re-synced ::::::::::::::::::::");
                }
                ReadStatus::Success => print_event(&result.1),
            }
        } else {
            let err = a.err().unwrap();
            match err.raw_os_error() {
                Some(libc::EAGAIN) => continue,
                _ => {
                    println!("{}", err);
                    break;
                }
            }
        }
    }
}

fn version(&self) -> u16

fn set_product_id(&self, field: u16)

Examples found in repository

examples/vmouse.rs (line 43)

fn main() -> Result<(), std::io::Error> {
    // Parse command line arguments
    let mut args = std::env::args();

    if args.len() != 2 {
        let n = args.nth(0).unwrap();
        println!("Usage: `{} DEVICE`, eg. `{} /dev/input/event13`", n, n);
        std::process::exit(1);
    }

    let device = &args.nth(1).unwrap();

    // Connect to real keyboard
    let f = File::open(device)?;
    let d = Device::new_from_file(f)?;

    if let Some(n) = d.name() {
        println!(
            "Connected to device: '{}' ({:04x}:{:04x})",
            n,
            d.vendor_id(),
            d.product_id()
        );
    }

    // Create virtual device
    let u = UninitDevice::new().unwrap();

    // Setup device
    // per: https://01.org/linuxgraphics/gfx-docs/drm/input/uinput.html#mouse-movements

    u.set_name("Virtual Mouse");
    u.set_bustype(BusType::BUS_USB as u16);
    u.set_vendor_id(0xabcd);
    u.set_product_id(0xefef);

    // Note mouse keys have to be enabled for this to be detected
    // as a usable device, see: https://stackoverflow.com/a/64559658/6074942
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_LEFT))?;
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_RIGHT))?;

    u.enable(EventCode::EV_REL(EV_REL::REL_X))?;
    u.enable(EventCode::EV_REL(EV_REL::REL_Y))?;

    u.enable(EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;

    // Attempt to create UInputDevice from UninitDevice
    let v = UInputDevice::create_from_device(&u)?;

    loop {
        // Fetch keyboard events
        let (_status, event) = d.next_event(ReadFlag::NORMAL | ReadFlag::BLOCKING)?;

        // Map these to mouse events
        println!("Event: {:?}", event);

        // Map direction keys to mouse events
        let e = match event.event_code {
            EventCode::EV_KEY(EV_KEY::KEY_RIGHT) => Some((EV_REL::REL_X, MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_LEFT) => Some((EV_REL::REL_X, -MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_UP) => Some((EV_REL::REL_Y, -MOUSE_STEP_Y)),
            EventCode::EV_KEY(EV_KEY::KEY_DOWN) => Some((EV_REL::REL_Y, MOUSE_STEP_Y)),
            _ => None,
        };

        // Write mapped event
        if let Some((e, n)) = e {
            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_REL(e),
                value: n,
            })?;

            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_SYN(EV_SYN::SYN_REPORT),
                value: 0,
            })?;
        }
    }
}

fn set_vendor_id(&self, field: u16)

Examples found in repository

examples/vmouse.rs (line 42)

fn main() -> Result<(), std::io::Error> {
    // Parse command line arguments
    let mut args = std::env::args();

    if args.len() != 2 {
        let n = args.nth(0).unwrap();
        println!("Usage: `{} DEVICE`, eg. `{} /dev/input/event13`", n, n);
        std::process::exit(1);
    }

    let device = &args.nth(1).unwrap();

    // Connect to real keyboard
    let f = File::open(device)?;
    let d = Device::new_from_file(f)?;

    if let Some(n) = d.name() {
        println!(
            "Connected to device: '{}' ({:04x}:{:04x})",
            n,
            d.vendor_id(),
            d.product_id()
        );
    }

    // Create virtual device
    let u = UninitDevice::new().unwrap();

    // Setup device
    // per: https://01.org/linuxgraphics/gfx-docs/drm/input/uinput.html#mouse-movements

    u.set_name("Virtual Mouse");
    u.set_bustype(BusType::BUS_USB as u16);
    u.set_vendor_id(0xabcd);
    u.set_product_id(0xefef);

    // Note mouse keys have to be enabled for this to be detected
    // as a usable device, see: https://stackoverflow.com/a/64559658/6074942
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_LEFT))?;
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_RIGHT))?;

    u.enable(EventCode::EV_REL(EV_REL::REL_X))?;
    u.enable(EventCode::EV_REL(EV_REL::REL_Y))?;

    u.enable(EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;

    // Attempt to create UInputDevice from UninitDevice
    let v = UInputDevice::create_from_device(&u)?;

    loop {
        // Fetch keyboard events
        let (_status, event) = d.next_event(ReadFlag::NORMAL | ReadFlag::BLOCKING)?;

        // Map these to mouse events
        println!("Event: {:?}", event);

        // Map direction keys to mouse events
        let e = match event.event_code {
            EventCode::EV_KEY(EV_KEY::KEY_RIGHT) => Some((EV_REL::REL_X, MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_LEFT) => Some((EV_REL::REL_X, -MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_UP) => Some((EV_REL::REL_Y, -MOUSE_STEP_Y)),
            EventCode::EV_KEY(EV_KEY::KEY_DOWN) => Some((EV_REL::REL_Y, MOUSE_STEP_Y)),
            _ => None,
        };

        // Write mapped event
        if let Some((e, n)) = e {
            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_REL(e),
                value: n,
            })?;

            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_SYN(EV_SYN::SYN_REPORT),
                value: 0,
            })?;
        }
    }
}

fn set_bustype(&self, field: u16)

Examples found in repository

examples/vmouse.rs (line 41)

fn main() -> Result<(), std::io::Error> {
    // Parse command line arguments
    let mut args = std::env::args();

    if args.len() != 2 {
        let n = args.nth(0).unwrap();
        println!("Usage: `{} DEVICE`, eg. `{} /dev/input/event13`", n, n);
        std::process::exit(1);
    }

    let device = &args.nth(1).unwrap();

    // Connect to real keyboard
    let f = File::open(device)?;
    let d = Device::new_from_file(f)?;

    if let Some(n) = d.name() {
        println!(
            "Connected to device: '{}' ({:04x}:{:04x})",
            n,
            d.vendor_id(),
            d.product_id()
        );
    }

    // Create virtual device
    let u = UninitDevice::new().unwrap();

    // Setup device
    // per: https://01.org/linuxgraphics/gfx-docs/drm/input/uinput.html#mouse-movements

    u.set_name("Virtual Mouse");
    u.set_bustype(BusType::BUS_USB as u16);
    u.set_vendor_id(0xabcd);
    u.set_product_id(0xefef);

    // Note mouse keys have to be enabled for this to be detected
    // as a usable device, see: https://stackoverflow.com/a/64559658/6074942
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_LEFT))?;
    u.enable(EventCode::EV_KEY(EV_KEY::BTN_RIGHT))?;

    u.enable(EventCode::EV_REL(EV_REL::REL_X))?;
    u.enable(EventCode::EV_REL(EV_REL::REL_Y))?;

    u.enable(EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;

    // Attempt to create UInputDevice from UninitDevice
    let v = UInputDevice::create_from_device(&u)?;

    loop {
        // Fetch keyboard events
        let (_status, event) = d.next_event(ReadFlag::NORMAL | ReadFlag::BLOCKING)?;

        // Map these to mouse events
        println!("Event: {:?}", event);

        // Map direction keys to mouse events
        let e = match event.event_code {
            EventCode::EV_KEY(EV_KEY::KEY_RIGHT) => Some((EV_REL::REL_X, MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_LEFT) => Some((EV_REL::REL_X, -MOUSE_STEP_X)),
            EventCode::EV_KEY(EV_KEY::KEY_UP) => Some((EV_REL::REL_Y, -MOUSE_STEP_Y)),
            EventCode::EV_KEY(EV_KEY::KEY_DOWN) => Some((EV_REL::REL_Y, MOUSE_STEP_Y)),
            _ => None,
        };

        // Write mapped event
        if let Some((e, n)) = e {
            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_REL(e),
                value: n,
            })?;

            v.write_event(&InputEvent {
                time: event.time,
                event_code: EventCode::EV_SYN(EV_SYN::SYN_REPORT),
                value: 0,
            })?;
        }
    }
}

fn set_version(&self, field: u16)

fn abs_info(&self, code: &EventCode) -> Option<AbsInfo>

Get the axis info for the given axis, as advertised by the kernel.

Returns the AbsInfo for the given the code or None if the device doesn’t support this code

Examples found in repository

examples/evtest.rs (line 20)

fn print_abs_bits(dev: &Device, axis: &EV_ABS) {
    let code = EventCode::EV_ABS(axis.clone());

    if !dev.has(code) {
        return;
    }

    let abs = dev.abs_info(&code).unwrap();

    println!("\tValue\t{}", abs.value);
    println!("\tMin\t{}", abs.minimum);
    println!("\tMax\t{}", abs.maximum);
    if abs.fuzz != 0 {
        println!("\tFuzz\t{}", abs.fuzz);
    }
    if abs.flat != 0 {
        println!("\tFlat\t{}", abs.flat);
    }
    if abs.resolution != 0 {
        println!("\tResolution\t{}", abs.resolution);
    }
}

fn set_abs_info(&self, code: &EventCode, absinfo: &AbsInfo)

Change the abs info for the given EV_ABS event code, if the code exists.

This function has no effect if has_event_code returns false for this code.

fn event_value(&self, code: &EventCode) -> Option<i32>

Returns the current value of the event type.

If the device supports this event type and code, the return value is set to the current value of this axis. Otherwise, None is returned.

fn set_event_value(&self, code: &EventCode, val: i32) -> Result<()>

Set the value for a given event type and code.

This only makes sense for some event types, e.g. setting the value for EV_REL is pointless.

This is a local modification only affecting only this representation of this device. A future call to event_value() will return this value, unless the value was overwritten by an event.

If the device supports ABS_MT_SLOT, the value set for any ABS_MT_* event code is the value of the currently active slot. You should use set_slot_value instead.

If the device supports ABS_MT_SLOT and the type is EV_ABS and the code is ABS_MT_SLOT, the value must be a positive number less then the number of slots on the device. Otherwise, set_event_value returns Err.

fn abs_minimum(&self, code: u32) -> Result<i32>

fn abs_maximum(&self, code: u32) -> Result<i32>

fn abs_fuzz(&self, code: u32) -> Result<i32>

fn abs_flat(&self, code: u32) -> Result<i32>

fn abs_resolution(&self, code: u32) -> Result<i32>

fn set_abs_minimum(&self, code: u32, val: i32)

fn set_abs_maximum(&self, code: u32, val: i32)

fn set_abs_fuzz(&self, code: u32, val: i32)

fn set_abs_flat(&self, code: u32, val: i32)

fn set_abs_resolution(&self, code: u32, val: i32)

fn slot_value(&self, slot: u32, code: &EventCode) -> Option<i32>

Return the current value of the code for the given slot.

If the device supports this event code, the return value is is set to the current value of this axis. Otherwise, or if the event code is not an ABS_MT_* event code, None is returned

fn set_slot_value(&self, slot: u32, code: &EventCode, val: i32) -> Result<()>

Set the value for a given code for the given slot.

This is a local modification only affecting only this representation of this device. A future call to slot_value will return this value, unless the value was overwritten by an event.

This function does not set event values for axes outside the ABS_MT range, use set_event_value instead.

fn num_slots(&self) -> Option<i32>

Get the number of slots supported by this device.

The number of slots supported, or None if the device does not provide any slots

A device may provide ABS_MT_SLOT but a total number of 0 slots. Hence the return value of None for “device does not provide slots at all”

fn current_slot(&self) -> Option<i32>

Get the currently active slot.

This may differ from the value an ioctl may return at this time as events may have been read off the file since changing the slot value but those events are still in the buffer waiting to be processed. The returned value is the value a caller would see if it were to process events manually one-by-one.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl DeviceWrapper for Device

impl DeviceWrapper for UninitDevice