AnimatedEvent.h

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#ifndef AnimatedEvent_h
#define AnimatedEvent_h
 
#include "ReelTwo.h"
 
typedef void (*AnimatedLoopDone)();
 
class AnimatedEvent
{
public:
    AnimatedEvent() :
        fNext(NULL)
    {
        if (*head() == NULL)
            *head() = this;
        if (*tail() != NULL)
            (*tail())->fNext = this;
        *tail() = this;
    }
 
    static void process()
    {
        static AnimatedEvent* sGuard;
        AnimatedLoopDone* loopProc = loopDoneProc();
        *loopProc = NULL;
        for (AnimatedEvent* evt = *head(); evt != NULL; evt = evt->fNext)
        {
            // Reentrancy guard
            if (sGuard == evt)
                continue;
            sGuard = evt;
            evt->animate();
            sGuard = NULL;
        }
    #if defined(USE_SMQ) && !defined(USE_SMQ32)
        static bool sSMQReentrancy;
        if (!sSMQReentrancy)
        {
            sSMQReentrancy = true;
            SMQ::process();
            sSMQReentrancy = false;
        }
    #endif
        if ((*loopProc) != NULL)
        {
            (*loopProc)();
            *loopProc = NULL;
        }
    }
 
    // \private
    void setLoopDoneCallback(AnimatedLoopDone loopProc)
    {
        *loopDoneProc() = loopProc;
    }
 
    virtual void animate() = 0;
 
private:
    AnimatedEvent* fNext;
 
    static AnimatedEvent** head()
    {
        static AnimatedEvent* sHead;
        return &sHead;
    }
 
    static AnimatedEvent** tail()
    {
        static AnimatedEvent* sTail;
        return &sTail;
    }
 
    static AnimatedLoopDone* loopDoneProc()
    {
        static AnimatedLoopDone sProc;
        return &sProc;
    }
};
 
#endif