@sierdzio hhhhh

@HenrikSt. in your Kobi class, add a setter method: class Kobi : public ... { public: ... void setButtonWidget( QPushButton* button ) { m_PushButton = button; } void Kobi::FullScreen () { tableWidget->hide (); // OR EMIT A SIGNAL HERE AND CONNECT IT TO THE PUSHBUTTON'S hide() SLOT if( m_PushButton ) m_PushButton->hide(); } private: QPointer<QPushButton*> m_PushButton; } Easiest would be when you could already create the button in this class?

@jsulm Yes, i agree with you. But as per above requriment i gave that sample.

@alex_malyu Thanks very much that's what I was missing. To get it working I removed the include for DifficultyAnalyser in the SokoGenerator header file #include "DifficultyAnalyser" I simply the following in the SokoGenerator header class DifficultyAnalyser; DifficultyAnalyser* diffAnalyser; I then included the DifficultyAnalyser header in the SokoGenerator cpp file, and created a new instance of it #include "difficultyanalyser.h" diffAnalyser = new DifficultyAnalyser; And in the header for DifficultyAnalyser I included SokoGenerator #include "SokoGenerator.h" Thanks for your help!