Struct wayland_server::protocol::wl_data_offer::WlDataOffer

pub struct WlDataOffer { /* private fields */ }

offer to transfer data

A wl_data_offer represents a piece of data offered for transfer by another client (the source client). It is used by the copy-and-paste and drag-and-drop mechanisms. The offer describes the different mime types that the data can be converted to and provides the mechanism for transferring the data directly from the source client.

See also the Request enum for this interface.

Implementations

impl WlDataOffer

pub fn offer(&self, mime_type: String)

advertise offered mime type

Sent immediately after creating the wl_data_offer object. One event per offered mime type.

pub fn source_actions(&self, source_actions: DndAction)

notify the source-side available actions

This event indicates the actions offered by the data source. It will be sent right after wl_data_device.enter, or anytime the source side changes its offered actions through wl_data_source.set_actions.

pub fn action(&self, dnd_action: DndAction)

notify the selected action

This event indicates the action selected by the compositor after matching the source/destination side actions. Only one action (or none) will be offered here.

This event can be emitted multiple times during the drag-and-drop operation in response to destination side action changes through wl_data_offer.set_actions.

This event will no longer be emitted after wl_data_device.drop happened on the drag-and-drop destination, the client must honor the last action received, or the last preferred one set through wl_data_offer.set_actions when handling an “ask” action.

Compositors may also change the selected action on the fly, mainly in response to keyboard modifier changes during the drag-and-drop operation.

The most recent action received is always the valid one. Prior to receiving wl_data_device.drop, the chosen action may change (e.g. due to keyboard modifiers being pressed). At the time of receiving wl_data_device.drop the drag-and-drop destination must honor the last action received.

Action changes may still happen after wl_data_device.drop, especially on “ask” actions, where the drag-and-drop destination may choose another action afterwards. Action changes happening at this stage are always the result of inter-client negotiation, the compositor shall no longer be able to induce a different action.

Upon “ask” actions, it is expected that the drag-and-drop destination may potentially choose a different action and/or mime type, based on wl_data_offer.source_actions and finally chosen by the user (e.g. popping up a menu with the available options). The final wl_data_offer.set_actions and wl_data_offer.accept requests must happen before the call to wl_data_offer.finish.

Trait Implementations

impl Clone for WlDataOffer

fn clone(&self) -> WlDataOffer

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for WlDataOffer

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

Formats the value using the given formatter.

impl PartialEq<WlDataOffer> for WlDataOffer

fn eq(&self, other: &WlDataOffer) -> 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 !=.

impl Resource for WlDataOffer

type Request = Request

type Event = Event

fn interface() -> &'static Interface

fn id(&self) -> ObjectId

fn version(&self) -> u32

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

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

fn handle(&self) -> &WeakHandle

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

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

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

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

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

impl Eq for WlDataOffer