RetryTransition Class Reference

#include <RetryTransition.h>

Inheritance diagram for RetryTransition:

Collaboration diagram for RetryTransition:

Public Types
using	RetryAction = std::function< void()>

Public Member Functions
template<typename Func >
	RetryTransition (const typename QtPrivate::FunctionPointer< Func >::Object *sender, Func signalFn, QAbstractState *target, RetryAction retryAction, int maxRetries=1)
void	reset ()
	Reset retry count (call when re-entering the source state)
int	retryCount () const
	Get current retry count.
int	maxRetries () const
	Get max retries setting.
Public Member Functions inherited from QGCSignalTransition
	QGCSignalTransition (QState *sourceState=nullptr)
	QGCSignalTransition (const QObject *sender, const char *signal, QState *sourceState=nullptr)
template<typename Func >
	QGCSignalTransition (const typename QtPrivate::FunctionPointer< Func >::Object *sender, Func signalFn, QState *sourceState=nullptr)
QGCStateMachine *	machine () const
	Get the QGCStateMachine this transition belongs to.
Vehicle *	vehicle () const
	Get the Vehicle associated with the state machine.

Protected Member Functions
bool	eventTest (QEvent *event) override
void	onTransition (QEvent *event) override
	Called when transition fires (after max retries)

Detailed Description

Transition that retries an action N times before advancing to target state. Useful for timeout handling where you want to retry before giving up.

On each trigger (e.g., timeout signal):

• If retry count < max: increment count, invoke retryAction, block transition
• If retry count >= max: reset count, allow transition to target

Example usage:

auto* retry = new RetryTransition(
    state, &WaitStateBase::timeout,
    nextState,
    [this]() { _requestAutopilotVersion(_stateAutopilotVersion); },
    1  // max retries
);
state->addTransition(retry);

Definition at line 26 of file RetryTransition.h.

Member Typedef Documentation

RetryAction

using RetryTransition::RetryAction = std::function<void()>

Definition at line 32 of file RetryTransition.h.

Constructor & Destructor Documentation

RetryTransition()

template<typename Func >

RetryTransition::RetryTransition ( const typename QtPrivate::FunctionPointer< Func >::Object *  sender, Func  signalFn, QAbstractState *  target, RetryAction  retryAction, int  maxRetries = 1  )

inline

Create a retry transition

Parameters

sender	Object emitting the trigger signal (usually the state itself)
signal	Signal that triggers retry/advance (usually timeout)
target	State to transition to after max retries exhausted
retryAction	Action to invoke on each retry attempt
maxRetries	Maximum retry attempts before transitioning (default: 1)

Definition at line 41 of file RetryTransition.h.

Member Function Documentation

eventTest()

bool RetryTransition::eventTest ( QEvent *  event )

overrideprotected

Override to implement retry logic Returns false during retries (blocking transition), true after max retries

Definition at line 9 of file RetryTransition.cc.

maxRetries()

int RetryTransition::maxRetries ( ) const

inline

Get max retries setting.

Definition at line 60 of file RetryTransition.h.

onTransition()

void RetryTransition::onTransition ( QEvent *  event )

overrideprotected

Called when transition fires (after max retries)

Definition at line 42 of file RetryTransition.cc.

reset()

void RetryTransition::reset ( )

inline

Reset retry count (call when re-entering the source state)

Definition at line 54 of file RetryTransition.h.

retryCount()

int RetryTransition::retryCount ( ) const

inline

Get current retry count.

Definition at line 57 of file RetryTransition.h.

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

• src/Utilities/StateMachine/Transitions/RetryTransition.h
• src/Utilities/StateMachine/Transitions/RetryTransition.cc