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#ifndef ANIMATOR_HH
#define ANIMATOR_HH
#include <memory>
class Animation;
class Looper;
class Animator {
public:
class Observer {
public:
virtual ~Observer() {}
// Called after all active animations callbacks has been called.
// Not called if there are no active animations.
virtual void tick(Animator* animator) = 0;
protected:
Observer() {}
};
class AnimationObserver {
public:
virtual ~AnimationObserver() {}
// Called after the animation has been updated with the new value
virtual void ticked(Animator* animator, Animation* animation,
double value) = 0;
// Called after the animation stopped, either because stop() was called
// or because animation->tick() return false.
// If animation->tick() returned false ticked method above is always called
// first
virtual void stopped(Animator* animator, Animation* animation) = 0;
protected:
AnimationObserver() {}
};
virtual ~Animator() {}
static std::unique_ptr<Animator> create(
std::shared_ptr<Looper> const& looper);
virtual void start(std::shared_ptr<Animation> const& animation,
AnimationObserver* observer) = 0;
virtual bool observe(Animation* animation, AnimationObserver* observer) = 0;
virtual bool stop(Animation* animation) = 0;
virtual bool active(Animation* animation) const = 0;
virtual bool active() const = 0;
virtual void add_observer(Observer* observer) = 0;
virtual void remove_observer(Observer* observer) = 0;
protected:
Animator() {}
Animator(Animator const&) = delete;
Animator& operator=(Animator const&) = delete;
};
#endif // ANIMATOR_HH
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