Wayland_server.Wl_data_offerOffer 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.
type 'v t = ([ `Wl_data_offer ], 'v, [ `Server ]) Proxy.tmodule Error = Wayland_proto.Wl_data_offer.Errorval offer : [< `V1 | `V2 | `V3 ] t -> mime_type:string -> unitAdvertise offered mime type.
Sent immediately after creating the wl_data_offer object. One event per offered mime type.
val action : [< `V3 ] t -> dnd_action:int32 -> unitNotify 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.
val source_actions : [< `V3 ] t -> source_actions:int32 -> unitNotify 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.
Note: Servers will always want to use v1.
class virtual +'a v1 : object ... endHandler for a proxy with version >= 1.
class virtual +'a v2 : object ... endHandler for a proxy with version >= 2.
class virtual +'a v3 : object ... endHandler for a proxy with version >= 3.