connect(subSamplingSpinBox,SIGNAL(editingFinished()),this,SLOT(setVFProperty()));
connect(scaleSpinBox,SIGNAL(editingFinished()),this,SLOT(setVFProperty()));
connect(subSamplingSpinBox,SIGNAL(editingFinished()),this,SLOT(setVFProperty()));
connect(scaleSpinBox,SIGNAL(editingFinished()),this,SLOT(setVFProperty()));