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#pragma once
#include <unordered_map>
#include "base.h"
#include "application.h"
#include "timer.h"
namespace cru::ui::animations
{
using AnimationTimeUnit = FloatSecond;
struct IAnimationDelegate : virtual Interface
{
virtual void Cancel() = 0;
};
using AnimationDelegatePtr = std::shared_ptr<IAnimationDelegate>;
using AnimationStepHandler = std::function<void(AnimationDelegatePtr, double)>;
using AnimationStartHandler = std::function<void(AnimationDelegatePtr)>;
using AnimationFinishHandler = std::function<void()>;
using AnimationCancelHandler = std::function<void()>;
namespace details
{
class Animation;
using AnimationPtr = std::unique_ptr<Animation>;
class AnimationInfo
{
public:
AnimationInfo(String tag, const AnimationTimeUnit duration)
: tag(std::move(tag)),
duration(duration)
{
}
AnimationInfo(const AnimationInfo& other) = default;
AnimationInfo(AnimationInfo&& other) = default;
AnimationInfo& operator=(const AnimationInfo& other) = default;
AnimationInfo& operator=(AnimationInfo&& other) = default;
~AnimationInfo() = default;
String tag;
AnimationTimeUnit duration;
std::vector<AnimationStepHandler> step_handlers{};
std::vector<AnimationStartHandler> start_handlers{};
std::vector<AnimationFinishHandler> finish_handlers{};
std::vector<AnimationCancelHandler> cancel_handlers{};
};
class AnimationManager : public Object
{
public:
static AnimationManager* GetInstance()
{
return Application::GetInstance()->GetAnimationManager();
}
public:
AnimationManager();
AnimationManager(const AnimationManager& other) = delete;
AnimationManager(AnimationManager&& other) = delete;
AnimationManager& operator=(const AnimationManager& other) = delete;
AnimationManager& operator=(AnimationManager&& other) = delete;
~AnimationManager() override;
AnimationDelegatePtr CreateAnimation(AnimationInfo info);
void RemoveAnimation(const String& tag);
private:
void SetTimer();
void KillTimer();
private:
std::unordered_map<String, AnimationPtr> animations_;
std::optional<TimerTask> timer_;
};
}
class AnimationBuilder : public Object
{
public:
AnimationBuilder(String tag, const AnimationTimeUnit duration)
: info_(std::move(tag), duration)
{
}
AnimationBuilder& AddStepHandler(const AnimationStepHandler& handler)
{
CheckValid();
info_.step_handlers.push_back(handler);
return *this;
}
AnimationBuilder& AddStartHandler(const AnimationStartHandler& handler)
{
CheckValid();
info_.start_handlers.push_back(handler);
return *this;
}
AnimationBuilder& AddFinishHandler(const AnimationFinishHandler& handler)
{
CheckValid();
info_.finish_handlers.push_back(handler);
return *this;
}
AnimationBuilder& AddCancelHandler(const AnimationCancelHandler& handler)
{
CheckValid();
info_.cancel_handlers.push_back(handler);
return *this;
}
AnimationDelegatePtr Start();
private:
void CheckValid() const
{
if (!valid_)
throw std::runtime_error("The animation builder is invalid.");
}
bool valid_ = true;
details::AnimationInfo info_;
};
}
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