#pragma once
#include <QDebug>

namespace Flex_Qt {

template <typename T>
class Singleton_Widget {
public:
    static T* instance() {
        if (!instance_)
            qInfo() << "error Singleton_Widget not created" << instance_;
        return instance_;
    }

    Singleton_Widget() {
        if (instance_)
            qInfo() << "error Singleton_Widget duplicated" << instance_;
        instance_ = static_cast<T*>(this);
    }

    virtual ~Singleton_Widget() = default;
    Singleton_Widget(T&&) = delete;
    Singleton_Widget(const T&) = delete;
    void operator=(const T&) = delete;

protected:
    static T* instance_;
};

template <typename T>
T* Singleton_Widget<T>::instance_ = nullptr;

} // namespace Flex_Qt