Provides the BHandler class. More...

Classes
class	BHandler
	Handles messages that are passed on by a BLooper. More...

Namespaces
namespace	BPrivate
	Internal or experimental API.

Macros
#define	B_OBSERVE_ORIGINAL_WHAT "be:observe_orig_what"
	Constant for a message data field in observer messages.

#define	B_OBSERVE_WHAT_CHANGE "be:observe_change_what"
	Internal.

Variables
const uint32	B_OBSERVER_OBSERVE_ALL = 0xffffffff
	Parameter to BHandler::StartWatching().

Detailed Description

Provides the BHandler class.

Macro Definition Documentation

◆ B_OBSERVE_ORIGINAL_WHAT

#define B_OBSERVE_ORIGINAL_WHAT "be:observe_orig_what"

Constant for a message data field in observer messages.

If you have called one of the flavors of BHandler::StartWachting(), and you receive a notification, sometimes there can be send a BMessage to go with that notification. The message you receive is a copy of that message, but with the what constant set to B_OBSERVER_NOTICE_CHANGE. The original what constant of the transmitted data message is stored behind the label defined by this constant.

Since: BeOS R5

◆ B_OBSERVE_WHAT_CHANGE

#define B_OBSERVE_WHAT_CHANGE "be:observe_change_what"

Internal.

Since: BeOS R5

Variable Documentation

◆ B_OBSERVER_OBSERVE_ALL

B_OBSERVER_OBSERVE_ALL = 0xffffffff

Parameter to BHandler::StartWatching().

Note: Specifying this parameter as the what value, leads to the same results as calling BHandler::StartWatchingAll().

Since: BeOS R5

Classes

Namespaces