item cannot be closed
item cannot be docked at bottom
item cannot be docked at center
item cannot be docked left
item cannot be docked right
item cannot be docked at top
item cannot be iconified
item is locked, it cannot be moved around
item cannot be undocked
item cannot be docked horizontally
item cannot be docked vertically
Normal dock item
item doesn't have a grip
Described the behaviour of a doc item. The item can have multiple flags set.