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/****************************************************************************
*
* (c) 2009-2020 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
*
* QGroundControl is licensed according to the terms in the file
* COPYING.md in the root of the source code directory.
*
****************************************************************************/
#pragma once
#include <QObject>
class StateMachine : public QObject
{
Q_OBJECT
public:
typedef void (*StateFn)(StateMachine* stateMachine);
StateMachine(void);
/// Start the state machine with the first step
void start(void);
/// Advance the state machine to the next state and call the state function
void advance(void);
/// Move the state machine to the specified state and call the state function
void move(StateFn stateFn);
StateFn currentState(void);
/// @return The number of states in the rgStates array
virtual int stateCount(void) const = 0;
/// @return Array of states to execute
virtual const StateFn* rgStates(void) const = 0;
/// Called when all states have completed
virtual void statesCompleted(void) const;
protected:
bool _active = false;
int _stateIndex = -1;
};