Enum wayland_client::protocol::wl_data_offer::Event
source · #[non_exhaustive]pub enum Event {
Offer {
mime_type: String,
},
SourceActions {
source_actions: WEnum<DndAction>,
},
Action {
dnd_action: WEnum<DndAction>,
},
}
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Offer
advertise offered mime type
Sent immediately after creating the wl_data_offer object. One event per offered mime type.
SourceActions
notify the source-side available actions
This event indicates the actions offered by the data source. It will be sent immediately after creating the wl_data_offer object, or anytime the source side changes its offered actions through wl_data_source.set_actions.
Only available since version 3 of the interface
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.
Only available since version 3 of the interface
Implementations§
Trait Implementations§
Auto Trait Implementations§
impl Freeze for Event
impl RefUnwindSafe for Event
impl Send for Event
impl Sync for Event
impl Unpin for Event
impl UnwindSafe for Event
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
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