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#include "animation.h"
#include <cassert>
#include <utility>
namespace cru::ui::animations
{
constexpr int frame_rate = 60;
constexpr double frame_step_time = 1.0 / frame_rate;
AnimationManager::AnimationManager()
: timer_action_(new Action<>([this]()
{
for (auto& animation : animations_)
{
if (animation.second->Step(frame_step_time))
InvokeLater([=]
{
RemoveAnimation(animation.second); //TODO!!!
});
}
}))
{
}
AnimationManager::~AnimationManager()
{
for (auto& animation : animations_)
delete animation.second;
if (timer_)
timer_->Cancel();
}
void AnimationManager::AddAnimation(Animation* animation)
{
if (animations_.empty())
timer_ = SetInterval(frame_step_time, timer_action_);
const auto find_result = animations_.find(animation->GetTag());
if (find_result != animations_.cend())
find_result->second->Cancel();
animations_.insert_or_assign(animation->GetTag(), animation);
}
void AnimationManager::RemoveAnimation(Animation* animation)
{
const auto find_result = animations_.find(animation->GetTag());
if (find_result != animations_.cend())
{
delete find_result->second;
animations_.erase(find_result);
}
if (animations_.empty())
{
assert(timer_);
timer_->Cancel();
timer_ = nullptr;
}
}
Animation::Animation(String tag, const double duration,
const Vector<std::shared_ptr<Action<Animation*, double>>>& step_handlers,
const Vector<std::shared_ptr<Action<Animation*>>>& start_handlers,
const Vector<std::shared_ptr<Action<Animation*>>>& finish_handlers,
const Vector<std::shared_ptr<Action<Animation*>>>& cancel_handlers
) : tag_(std::move(tag)), duration_(duration), step_handlers_(step_handlers),
start_handlers_(start_handlers), finish_handlers_(finish_handlers), cancel_handlers_(cancel_handlers)
{
AnimationManager::GetInstance()->AddAnimation(this);
}
bool Animation::Step(const double time)
{
current_time_ += time;
if (current_time_ > duration_)
{
for (auto& handler : step_handlers_)
(*handler)(this, 1);
for (auto& handler : finish_handlers_)
(*handler)(this);
return true;
}
else
{
for (auto& handler : step_handlers_)
(*handler)(this, current_time_ / duration_);
return false;
}
}
void Animation::Cancel()
{
for (auto& handler : cancel_handlers_)
(*handler)(this);
InvokeLater([this]
{
AnimationManager::GetInstance()->RemoveAnimation(this); //TODO!!!
});
}
}
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