gui_alive_checker.hpp

#ifndef LXGUI_GUI_ALIVE_CHECKER_HPP
#define LXGUI_GUI_ALIVE_CHECKER_HPP
 
#include "lxgui/lxgui.hpp"
#include "lxgui/utils.hpp"
#include "lxgui/utils_observer.hpp"
 
namespace lxgui::gui {
 
class region;
 
class alive_checker {
public:
    explicit alive_checker(region& object) : object_(object.observer_from_this()) {}
 
    // Non-copiable, non-movable
    alive_checker(const alive_checker&) = delete;
    alive_checker(alive_checker&&)      = delete;
    alive_checker& operator=(const alive_checker&) = delete;
    alive_checker& operator=(alive_checker&&) = delete;
 
    bool is_alive() const {
        return !object_.expired();
    }
 
private:
    utils::observer_ptr<region> object_;
};
 
} // namespace lxgui::gui
 
#endif