Selects all actions that are potentially supported by the destination.
When calling this function, do not restrict the passed in actions to
the ones provided by [method@Gdk.Drop.get_actions]. Those actions may
change in the future, even depending on the actions you provide here.
The @preferred action is a hint to the drag'n'drop mechanism about which
action to use when multiple actions are possible.
This function should be called by drag destinations in response to
%GDK_DRAG_ENTER or %GDK_DRAG_MOTION events. If the destination does
not yet know the exact actions it supports, it should set any possible
actions first and then later call this function again.
Selects all actions that are potentially supported by the destination.
When calling this function, do not restrict the passed in actions to the ones provided by [method@Gdk.Drop.get_actions]. Those actions may change in the future, even depending on the actions you provide here.
The @preferred action is a hint to the drag'n'drop mechanism about which action to use when multiple actions are possible.
This function should be called by drag destinations in response to %GDK_DRAG_ENTER or %GDK_DRAG_MOTION events. If the destination does not yet know the exact actions it supports, it should set any possible actions first and then later call this function again.