SubMachineState.cc

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#include "SubMachineState.h"
#include "QGCStateMachine.h"
#include "QGCLoggingCategory.h"
 
SubMachineState::SubMachineState(const QString& stateName, QState* parent, MachineFactory factory)
    : QGCState(stateName, parent)
    , _factory(std::move(factory))
{
}
 
void SubMachineState::onEntry(QEvent* event)
{
    QGCState::onEntry(event);
 
    if (!_factory) {
        qCCritical(QGCStateMachineLog) << stateName() << "no machine factory provided";
        emit error();
        return;
    }
 
    _childMachine = _factory(this);
    if (!_childMachine) {
        qCCritical(QGCStateMachineLog) << stateName() << "factory returned null machine";
        emit error();
        return;
    }
 
    qCDebug(QGCStateMachineLog) << stateName() << "starting child machine:" << _childMachine->machineName();
 
    connect(_childMachine, &QStateMachine::finished, this, &SubMachineState::_onChildFinished);
    connect(_childMachine, &QGCStateMachine::error, this, &SubMachineState::_onChildError);
 
    _childMachine->start();
}
 
void SubMachineState::onExit(QEvent* event)
{
    if (_childMachine && _childMachine->isRunning()) {
        qCDebug(QGCStateMachineLog) << stateName() << "stopping child machine on exit";
        _childMachine->stop();
    }
 
    if (_childMachine) {
        _childMachine->deleteLater();
        _childMachine = nullptr;
    }
 
    QGCState::onExit(event);
}
 
void SubMachineState::_onChildFinished()
{
    qCDebug(QGCStateMachineLog) << stateName() << "child machine finished";
    emit advance();
}
 
void SubMachineState::_onChildError()
{
    qCDebug(QGCStateMachineLog) << stateName() << "child machine error";
    emit childError();
    emit error();
}