Dialog 0 0 400 199 Dialog 10 140 341 32 Qt::Horizontal QDialogButtonBox::Cancel|QDialogButtonBox::Ok 30 70 91 31 11 选择纵横比 110 70 113 21 230 60 91 31 12 3 -1 :1 buttonBox accepted() Dialog accept() 248 254 157 274 buttonBox rejected() Dialog reject() 316 260 286 274