V

validate() (QAbstractSpinBox), 327, 328

validation, 140, 151,157, 327, 328, 491

value comparison, 13, 57 value()

QSettings, 183 QSpinBox, 441 QSqlQuery, 449,450,451 QSqlRecord, 464, 465, 466, 469 valueChanged() QDial, 128

QSpinBox, 124, 128, 199 ValueError exception, 68,114 valueFromText() (QSpinBox), 327, 328 values() (dict), 36, 96 variable names, 15, 76, 80, 88 version_info tuple (sys), 63 version string, application, 167

_version_, application variable,

vertical layout; see QVBoxLayout vertical lines; see QFrame view widgets; see QGraphicsView, QListView, QTableView, and QTreeView viewport coordinates, 328-331, 339,

342, 350,400 viewport()

QAbstractScrollArea, 392, 393 QPainter, 363, 400 views() (QGraphicsScene), 354, 362 virtual methods, 75, 99 visual design tool; see Qt Designer

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