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lifecycle.h Example File
animation/stickman/lifecycle.h

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 #ifndef LIFECYCLE_H
 #define LIFECYCLE_H

 #include <Qt>

 class StickMan;
 class QStateMachine;
 class QAnimationGroup;
 class QState;
 class QAbstractState;
 class QAbstractTransition;

 class GraphicsView;
 class LifeCycle
 {
 public:
     LifeCycle(StickMan *stickMan, GraphicsView *keyEventReceiver);
     ~LifeCycle();

     void setDeathAnimation(const QString &fileName);
     void addActivity(const QString &fileName, Qt::Key key);

     void start();

 private:
     QState *makeState(QState *parentState, const QString &animationFileName);

     StickMan *m_stickMan;
     QStateMachine *m_machine;
     QAnimationGroup *m_animationGroup;
     GraphicsView *m_keyReceiver;

     QState *m_alive;
     QState *m_dead;
     QState *m_idle;
 };

 #endif