Slot< Tsender, Args > Class Template Reference

The Slot class is used to receive signals from non-QObject derived classes. More...

#include <signalslot.h>

Inheritance diagram for Slot< Tsender, Args >:

Collaboration diagram for Slot< Tsender, Args >:

Public Member Functions
	Slot ()=delete
	Slot (const Slot &other)=delete
	Slot (const std::function< void(const Tsender &, Args...)> &callback) noexcept
	Constructor. More...
template<typename T >
	Slot (T &obj, void(T::*func)(const Tsender &, Args...)) noexcept
	Constructor. More...
	~Slot () noexcept
	Destructor. More...
int	getSignalCount () const noexcept
	Get the count of registered signals. More...
void	detachAll () noexcept
	Detach from all signals. More...
Slot &	operator= (Slot const &other)=delete

Private Attributes
QSet< const Signal< Tsender, Args... > * >	mSignals
	All signals this slot is attached to. More...
std::function< void(const Tsender &, Args...)>	mCallback
	The registered callback function. More...

Friends
class	Signal< Tsender, Args... >

Detailed Description

template<typename Tsender, typename... Args>
class librepcb::Slot< Tsender, Args >

The Slot class is used to receive signals from non-QObject derived classes.

Instances of this class allow to connect librepcb::Signal objects to callback functions. Instead of connecting signals directly to callbacks, this indirection allows to automatically disconnect connections if either the sender or the receiver object is destroyed. This avoids potential segfaults due to dereferencing dangling pointers.

A slot can be connected to multiple signals if they have the same signature.

Template Parameters

Tsender	Type of the sender object
Args	Arguments passed from librepcb::Signal::notify() to the callbacks

See also

librepcb::Signal

Constructor & Destructor Documentation

Slot() [1/4]

Slot ( )

delete

Slot() [2/4]

Slot ( const Slot< Tsender, Args > &  other )

delete

Slot() [3/4]

Slot ( const std::function< void(const Tsender &, Args...)> &  callback )

inlineexplicitnoexcept

Constructor.

Parameters

callback

The callback to be called if the signal is emitted

Warning

The function must never throw an exception!!!

Slot() [4/4]

Slot ( T &  obj, void(T::*)(const Tsender &, Args...)  func  )

inlineexplicitnoexcept

Constructor.

Parameters

obj	The object to be called if the signal is emitted
func	The member function to be called if the signal is emitted

Warning

The function must never throw an exception!!!

~Slot()

~Slot ( )

inlinenoexcept

Destructor.

Automatically disconnects from all signals.

Member Function Documentation

getSignalCount()

int getSignalCount ( ) const

inlinenoexcept

Get the count of registered signals.

Returns

Count of registered signals

detachAll()

void detachAll ( )

inlinenoexcept

Detach from all signals.

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operator=()

Slot& operator= ( Slot< Tsender, Args > const &  other )

delete

Friends And Related Function Documentation

Signal< Tsender, Args... >

friend class Signal< Tsender, Args... >

friend

Member Data Documentation

mSignals

QSet<const Signal<Tsender, Args...>*> mSignals

private

All signals this slot is attached to.

mCallback

std::function<void(const Tsender&, Args...)> mCallback

private

The registered callback function.

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

• /__w/1/s/libs/librepcb/core/utils/signalslot.h