Sets the actions that the source side client supports for this
operation. This request may trigger wl_data_source.action and
wl_data_offer.action events if the compositor needs to change the
selected action.
The dnd_actions argument must contain only values expressed in the
wl_data_device_manager.dnd_actions enum, otherwise it will result
in a protocol error.
This request must be made once only, and can only be made on sources
used in drag-and-drop, so it must be performed before
wl_data_device.start_drag. Attempting to use the source other than
for drag-and-drop will raise a protocol error.
set the available drag-and-drop actions
Sets the actions that the source side client supports for this operation. This request may trigger wl_data_source.action and wl_data_offer.action events if the compositor needs to change the selected action.
The dnd_actions argument must contain only values expressed in the wl_data_device_manager.dnd_actions enum, otherwise it will result in a protocol error.
This request must be made once only, and can only be made on sources used in drag-and-drop, so it must be performed before wl_data_device.start_drag. Attempting to use the source other than for drag-and-drop will raise a protocol error.