text: A class that can be used to implement a "busy" indicator. More...
  #include <busy_indicator.h>
  A class that can be used to implement a "busy" indicator.
  The exact form of the busy indicator is unspecified. It could be a "spinner" cursor in a GUI context, for example.
  This base class provides a "null" implementation, and can be overriden for specific behaviours.
  THe busy-ness semantics are defined by this object's lifetime.
  Definition at line 40 of file busy_indicator.h.
  A factory function that returns a new busy indicator.
  Because BUSY_INDICATORs are RAII objects (i.e. the busy-ness is defined by the object's lieftime), it's convenient to pass a factory function for a client to be able to make a busy indicator when needed.
  Definition at line 50 of file busy_indicator.h.
  This class is intended to be handled by pointer-to-base class.