connect(overlayWindowSpinBox,SIGNAL(valueChanged(double)),this,SLOT(setOverlayProperty()));
connect(overlayLevelSpinBox,SIGNAL(valueChanged(double)),this,SLOT(setOverlayProperty()));
connect(overlayLinkCheckBox,SIGNAL(stateChanged(int)),this,SLOT(setOverlayProperty()));
connect(overlayWindowSpinBox,SIGNAL(valueChanged(double)),this,SLOT(setOverlayProperty()));
connect(overlayLevelSpinBox,SIGNAL(valueChanged(double)),this,SLOT(setOverlayProperty()));
connect(overlayLinkCheckBox,SIGNAL(stateChanged(int)),this,SLOT(setOverlayProperty()));