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sigc::trackable Struct Reference
[Signals]

Base class for objects with auto-disconnection. More...

Inheritance diagram for sigc::trackable:

[legend]List of all members.

Public Types
typedef internal::func_destroy_notify	func_destroy_notify
Public Member Functions
	trackable ()
	trackable (const trackable& src)
trackable&	operator= (const trackable& src)
	~trackable ()
void	add_destroy_notify_callback (void* data, func_destroy_notify func) const
	Add a callback that is executed (notified) when the trackable object is detroyed.
void	remove_destroy_notify_callback (void* data) const
	Remove a callback previously installed with add_destroy_notify_callback().
void	notify_callbacks ()
	Execute and remove all previously installed callbacks.

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Detailed Description

Base class for objects with auto-disconnection.

trackable must be inherited when objects shall automatically invalidate slots referring to them on destruction. A slot built from a member function of a trackable derived type installs a callback that is invoked when the trackable object is destroyed or overwritten.

add_destroy_notify_callback() and remove_destroy_notify_callback() can be used to manually install and remove callbacks when notification of the object dying is needed.

notify_callbacks() invokes and removes all previously installed callbacks and can therefore be used to disconnect from all signals.

Note that there is no virtual destructor. Don't use trackable* as pointer type for managing your data or the destructors of your derived types won't be called when deleting your objects.

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Member Typedef Documentation

typedef internal::func_destroy_notify sigc::trackable::func_destroy_notify

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Constructor & Destructor Documentation

sigc::trackable::trackable

(

)

sigc::trackable::trackable

(

const trackable&

src

)

sigc::trackable::~trackable

(

)

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Member Function Documentation

trackable& sigc::trackable::operator=

(

const trackable&

src

)

void sigc::trackable::add_destroy_notify_callback	(	void *	data,
		func_destroy_notify	func
	)			const

Add a callback that is executed (notified) when the trackable object is detroyed.

Parameters:

	data	Passed into func upon notification.
	func	Callback executed upon destruction of the object.

void sigc::trackable::remove_destroy_notify_callback

(

void *

data

)

const

Remove a callback previously installed with add_destroy_notify_callback().

The callback is not executed.

Parameters:

data

Parameter passed into previous call to add_destroy_notify_callback().

void sigc::trackable::notify_callbacks

(

)

Execute and remove all previously installed callbacks.

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The documentation for this struct was generated from the following file:

• trackable.h

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