Implements class for working with keyboard for Linux platform.

You can find more information in comments below. Overrided methods can be found in corresponding base interface.

class CKeyboard :public virtual IKeyboard
    {
    public:
        bool isDown(const KEY key) override;
        bool isToggled(const KEY key) override; // For the keys which are not CapsLock and NumsLock return the same as isDown() 
        void getControlKeys(bool &ctrl, bool &alt, bool &shift) override;
    };