wayland_zwp_tablet_pad_ring_v2_t - Man Page

enum class wrapper_type { standard, display, foreign, proxy_wrapper }

void set_feedback (std::string const &description, uint32_t serial)
set compositor feedback
std::function< void(zwp_tablet_pad_ring_v2_source)> & on_source ()
ring event source
std::function< void(double)> & on_angle ()
angle changed
std::function< void()> & on_stop ()
interaction stopped
std::function< void(uint32_t)> & on_frame ()
end of a ring event sequence
uint32_t get_id () const
Get the id of a proxy object.
std::string get_class () const
Get the interface name (class) of a proxy object.
uint32_t get_version () const
Get the protocol object version of a proxy object.
wrapper_type get_wrapper_type () const
Get the type of a proxy object.
void set_queue (event_queue_t queue)
Assign a proxy to an event queue.
wl_proxy * c_ptr () const
Get a pointer to the underlying C struct.
bool proxy_has_object () const
Check whether this wrapper actually wraps an object.
operator bool () const
Check whether this wrapper actually wraps an object.
bool operator== (const proxy_t &right) const
Check whether two wrappers refer to the same object.
bool operator!= (const proxy_t &right) const
Check whether two wrappers refer to different objects.
void proxy_release ()
Release the wrapped object (if any), making this an empty wrapper.

static constexpr std::uint32_t set_feedback_since_version = 1
Minimum protocol version required for the set_feedback function.

Underlying wl_proxy type and properties of a proxy_t that affect construction, destruction, and event handling

Enumerator

standard

C pointer is a standard type compatible with wl_proxy*. Events are dispatched and it is destructed when the proxy_t is destructed. User data is set.

display

C pointer is a wl_display*. No events are dispatched, wl_display_disconnect is called when the proxy_t is destructed. User data is set.

foreign

C pointer is a standard type compatible with wl_proxy*, but another library owns it and it should not be touched in a way that could affect the operation of the other library. No events are dispatched, wl_proxy_destroy is not called when the proxy_t is destructed, user data is not touched. Consequently, there is no reference counting for the proxy_t. Lifetime of such wrappers should preferably be short to minimize the chance that the owning library decides to destroy the wl_proxy.

proxy_wrapper

C pointer is a wl_proxy* that was constructed with wl_proxy_create_wrapper. No events are dispatched, wl_proxy_wrapper_destroy is called when the proxy_t is destroyed. Reference counting is active. A reference to the proxy_t creating this proxy wrapper is held to extend its lifetime until after the proxy wrapper is destroyed.

Definition at line 116 of file wayland-client.hpp.

Get a pointer to the underlying C struct.

Returns

The underlying wl_proxy wrapped by this proxy_t if it exists, otherwise an exception is thrown

Get the interface name (class) of a proxy object.

Returns

The interface name of the object associated with the proxy

Get the id of a proxy object.

Returns

The id the object associated with the proxy

Get the protocol object version of a proxy object. Gets the protocol object version of a proxy object, or 0 if the proxy was created with unversioned API.

A returned value of 0 means that no version information is available, so the caller must make safe assumptions about the object's real version.

display_t will always return version 0.

Returns

The protocol object version of the proxy or 0

Get the type of a proxy object.

Definition at line 302 of file wayland-client.hpp.

angle changed

Parameters

degrees the current angle in degrees

Sent whenever the angle on a ring changes.

The angle is provided in degrees clockwise from the logical north of the ring in the pad's current rotation.

Definition at line 7712 of file wayland-client-protocol-unstable.cpp.

end of a ring event sequence

Parameters

time timestamp with millisecond granularity

Indicates the end of a set of ring events that logically belong together. A client is expected to accumulate the data in all events within the frame before proceeding.

All wp_tablet_pad_ring events before a wp_tablet_pad_ring.frame event belong logically together. For example, on termination of a finger interaction on a ring the compositor will send a wp_tablet_pad_ring.source event, a wp_tablet_pad_ring.stop event and a wp_tablet_pad_ring.frame event.

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

Definition at line 7722 of file wayland-client-protocol-unstable.cpp.

ring event source

Parameters

source the event source

Source information for ring events.

This event does not occur on its own. It is sent before a wp_tablet_pad_ring.frame event and carries the source information for all events within that frame.

The source specifies how this event was generated. If the source is wp_tablet_pad_ring.source.finger, a wp_tablet_pad_ring.stop event will be sent when the user lifts the finger off the device.

This event is optional. If the source is unknown for an interaction, no event is sent.

Definition at line 7707 of file wayland-client-protocol-unstable.cpp.

interaction stopped Stop notification for ring events.

For some wp_tablet_pad_ring.source types, a wp_tablet_pad_ring.stop event is sent to notify a client that the interaction with the ring has terminated. This enables the client to implement kinetic scrolling. See the wp_tablet_pad_ring.source documentation for information on when this event may be generated.

Any wp_tablet_pad_ring.angle events with the same source after this event should be considered as the start of a new interaction.

Definition at line 7717 of file wayland-client-protocol-unstable.cpp.

Check whether this wrapper actually wraps an object.

Returns

true if there is an underlying object, false if this wrapper is empty

Check whether two wrappers refer to different objects.

Check whether two wrappers refer to the same object.

Check whether this wrapper actually wraps an object.

Returns

true if there is an underlying object, false if this wrapper is empty

Release the wrapped object (if any), making this an empty wrapper. Note that display_t instances cannot be released this way. Attempts to do so are ignored.

Examples foreign_display.cpp.

set compositor feedback

Parameters

description ring description
serial serial of the mode switch event

Request that the compositor use the provided feedback string associated with this ring. This request should be issued immediately after a wp_tablet_pad_group.mode_switch event from the corresponding group is received, or whenever the ring is mapped to a different action. See wp_tablet_pad_group.mode_switch for more details.

Clients are encouraged to provide context-aware descriptions for the actions associated with the ring; compositors may use this information to offer visual feedback about the button layout (eg. on-screen displays).

The provided string 'description' is a UTF-8 encoded string to be associated with this ring, and is considered user-visible; general internationalization rules apply.

The serial argument will be that of the last wp_tablet_pad_group.mode_switch event received for the group of this ring. Requests providing other serials than the most recent one will be ignored.

Definition at line 7701 of file wayland-client-protocol-unstable.cpp.

Assign a proxy to an event queue.

Parameters

queue The event queue that will handle this proxy

Assign proxy to event queue. Events coming from proxy will be queued in queue instead of the display's main queue.

See also: display_t::dispatch_queue().

Examples proxy_wrapper.cpp.

Minimum protocol version required for the set_feedback function.

Definition at line 4989 of file wayland-client-protocol-unstable.hpp.