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 gdk.drop.Drop.getActions. Those actions may
change in the future, even depending on the actions you provide here.
The preferred action is a hint to the drag-and-drop mechanism about which
action to use when multiple actions are possible.
This function should be called by drag destinations in response to
gdk.types.EventType.DragEnter or gdk.types.EventType.DragMotion 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 gdk.drop.Drop.getActions. Those actions may change in the future, even depending on the actions you provide here.
The preferred action is a hint to the drag-and-drop mechanism about which action to use when multiple actions are possible.
This function should be called by drag destinations in response to gdk.types.EventType.DragEnter or gdk.types.EventType.DragMotion 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.