connect(myComboBoxFunctor, SIGNAL(activated(int)), this, SLOT(onPreviewChk()));
connect(this, SIGNAL(ListContensChanged()), this, SLOT(onPreviewChk()));
connect(myComboBoxFunctor, SIGNAL(activated(int)), this, SLOT(onPreviewChk()));
connect(this, SIGNAL(ListContensChanged()), this, SLOT(onPreviewChk()));