Question

These basic controls (widgets) are designed for direct use. There are also some abstract widget classes, designed for subclassing, and some more complex widgets.

QAction	Abstract user interface action that can appear both in menus and tool bars
QActionGroup	Groups actions together
QCheckBox	Checkbox with a text label
QComboBox	Combined button and popup list
QDial	Rounded range control (like a speedometer or potentiometer)
QLabel	Text or image display
QLCDNumber	Displays a number with LCD-like digits
QLineEdit	One-line text editor
QPopupMenu	Popup menu widget
QPushButton	Command button
QRadioButton	Radio button with a text or pixmap label
QScrollBar	Vertical or horizontal scroll bar
QSizeGrip	Corner-grip for resizing a top-level window
QSlider	Vertical or horizontal slider
QSpinBox	Spin box widget (spin button)
QTextEdit	Powerful single-page rich text editor
QToolButton	Quick-access button to commands or options, usually used inside a QToolBar