Enum wayland_server::protocol::wl_data_offer::Event [−][src]
#[non_exhaustive] pub enum Event { Offer { mime_type: String, }, SourceActions { source_actions: DndAction, }, Action { dnd_action: DndAction, }, }
Variants (Non-exhaustive)
This enum is marked as non-exhaustive
advertise offered mime type
Sent immediately after creating the wl_data_offer object. One event per offered mime type.
Show fields
Fields of Offer
mime_type: String
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.
Only available since version 3 of the interface
Show fields
Fields of SourceActions
source_actions: 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.
Only available since version 3 of the interface
Show fields
Fields of Action
dnd_action: DndAction
Trait Implementations
Wire representation of this MessageGroup
type Map = ResourceMap
type Map = ResourceMap
The wrapper type for ObjectMap allowing the mapping of Object and NewId arguments to the object map during parsing. Read more
Whether this message is a destructor Read more
Retrieve the child Object
associated with this message if any
Construct a message from its raw representation
unsafe fn from_raw_c(
obj: *mut c_void,
opcode: u32,
args: *const wl_argument
) -> Result<Event, ()>
unsafe fn from_raw_c(
obj: *mut c_void,
opcode: u32,
args: *const wl_argument
) -> Result<Event, ()>
Construct a message of this group from its C representation Read more
Build a C representation of this message Read more
Auto Trait Implementations
impl RefUnwindSafe for Event
impl UnwindSafe for Event
Blanket Implementations
Mutably borrows from an owned value. Read more
Convert Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
. Read more
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more
Convert &Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s. Read more
Convert &mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s. Read more