Enum Event

pub enum Event {
    Offer {
        mime_type: String,
    },
    SourceActions {
        source_actions: DndAction,
    },
    Action {
        dnd_action: DndAction,
    },
}

Variants

Offer

advertise offered mime type

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

Fields

mime_type: String

offered mime type

SourceActions

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.

Fields

source_actions: DndAction

actions offered by the data source

Action

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.

Fields

dnd_action: DndAction

action selected by the compositor

Trait Implementations

impl Debug for Event

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

Formats the value using the given formatter.

impl IntoMessage for Event

type Error = EncodeError

fn into_message(self, id: u32) -> Result<Message, <Self as IntoMessage>::Error>

Consumes |self| and serializes into a |Message|.

impl MessageType for Event

fn log(&self, this: ObjectId) -> String

Generates a string suitable for protocol logging this message.

fn message_name(&self) -> &'static CStr

Returns a static CStr reference that describes the interface/method of this message.