VariableContractsDialog 0 0 400 172 Dialog You can specify min and max value for the variable here Min Max Qt::Vertical 20 25 Qt::Horizontal QDialogButtonBox::Cancel|QDialogButtonBox::Ok buttonBox accepted() VariableContractsDialog accept() 248 254 157 274 buttonBox rejected() VariableContractsDialog reject() 316 260 286 274