Struct wayland_protocols::wp::pointer_gestures::zv1::server::zwp_pointer_gesture_pinch_v1::ZwpPointerGesturePinchV1

pub struct ZwpPointerGesturePinchV1 { /* private fields */ }

a pinch gesture object

A pinch gesture object notifies a client about a multi-finger pinch gesture detected on an indirect input device such as a touchpad. The gesture is usually initiated by multiple fingers moving towards each other or away from each other, or by two or more fingers rotating around a logical center of gravity. The precise conditions of when such a gesture is detected are implementation-dependent.

A gesture consists of three stages: begin, update (optional) and end. There cannot be multiple simultaneous hold, pinch or swipe gestures on a same pointer/seat, how compositors prevent these situations is implementation-dependent.

A gesture may be cancelled by the compositor or the hardware. Clients should not consider performing permanent or irreversible actions until the end of a gesture has been received.

See also the Request enum for this interface.

Implementations

impl ZwpPointerGesturePinchV1

pub fn begin(&self, serial: u32, time: u32, surface: &WlSurface, fingers: u32)

multi-finger pinch begin

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

pub fn update(&self, time: u32, dx: f64, dy: f64, scale: f64, rotation: f64)

multi-finger pinch motion

This event is sent when a multi-finger pinch gesture changes the position of the logical center, the rotation or the relative scale.

The dx and dy coordinates are relative coordinates in the surface coordinate space of the logical center of the gesture.

The scale factor is an absolute scale compared to the pointer_gesture_pinch.begin event, e.g. a scale of 2 means the fingers are now twice as far apart as on pointer_gesture_pinch.begin.

The rotation is the relative angle in degrees clockwise compared to the previous pointer_gesture_pinch.begin or pointer_gesture_pinch.update event.

pub fn end(&self, serial: u32, time: u32, cancelled: i32)

multi-finger pinch end

This event is sent when a multi-finger pinch 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.

Trait Implementations

impl Borrow<ObjectId> for ZwpPointerGesturePinchV1

fn borrow(&self) -> &ObjectId

Immutably borrows from an owned value.

impl Clone for ZwpPointerGesturePinchV1

fn clone(&self) -> ZwpPointerGesturePinchV1

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ZwpPointerGesturePinchV1

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

Formats the value using the given formatter.

impl Hash for ZwpPointerGesturePinchV1

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<Weak<ZwpPointerGesturePinchV1>> for ZwpPointerGesturePinchV1

fn eq(&self, other: &Weak<ZwpPointerGesturePinchV1>) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialEq for ZwpPointerGesturePinchV1

fn eq(&self, other: &ZwpPointerGesturePinchV1) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Resource for ZwpPointerGesturePinchV1

type Request = Request

The request enum for this interface

type Event<'event> = Event<'event>

The event enum for this interface

fn interface() -> &'static Interface

The interface description

fn id(&self) -> ObjectId

The ID of this object

fn version(&self) -> u32

The version of this object

fn data<U: 'static>(&self) -> Option<&U>

Access the user-data associated with this object

fn object_data(&self) -> Option<&Arc<dyn Any + Send + Sync>>

Access the raw data associated with this object.

fn handle(&self) -> &WeakHandle

Access the backend handle associated with this object

fn from_id(conn: &DisplayHandle, id: ObjectId) -> Result<Self, InvalidId>

Create an object resource from its ID

fn send_event(&self, evt: Self::Event<'_>) -> Result<(), InvalidId>

Send an event to this object

fn parse_request( conn: &DisplayHandle, msg: Message<ObjectId, OwnedFd> ) -> Result<(Self, Self::Request), DispatchError>

Parse a event for this object

fn write_event<'a>( &self, conn: &DisplayHandle, msg: Self::Event<'a> ) -> Result<Message<ObjectId, BorrowedFd<'a>>, InvalidId>

Serialize an event for this object

fn client(&self) -> Option<Client>

The client owning this object

fn is_alive(&self) -> bool

Checks if the Wayland object associated with this proxy is still alive

fn post_error(&self, code: impl Into<u32>, error: impl Into<String>)

Trigger a protocol error on this object

fn downgrade(&self) -> Weak<Self>

Creates a weak handle to this object

impl Eq for ZwpPointerGesturePinchV1