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# Miscellaneous Classes

These classes are useful classes not fitting into any other category.

QAccel | Handles keyboard accelerator and shortcut keys
QAccessible | Enums and static functions relating to accessibility
QAccessibleInterface | Defines an interface that exposes information about accessible objects
QAccessibleObject | Implements parts of the QAccessibleInterface for QObjects
QCustomMenuItem | Abstract base class for custom menu items in popup menus
QDoubleValidator | Range checking of floating-point numbers
QErrorMessage | Error message display dialog
QFileIconProvider | Icons for QFileDialog to use
QFilePreview | File previewing in QFileDialog
QFocusData | Maintains the list of widgets in the focus chain
QIntValidator | Validator which ensures that a string contains a valid integer within a specified range
QKeySequence | Encapsulates a key sequence as used by accelerators
QMenuData | Base class for QMenuBar and QPopupMenu
QMimeSource | Abstraction of objects which provide formatted data of a certain MIME type
QProcess | Used to start external programs and to communicate with them
QRangeControl | Integer value within a range
QRegExp | Pattern matching using regular expressions
QRegExpValidator | Used to check a string against a regular expression
QSettings | Persistent platform-independent application settings
QSignal | Can be used to send signals for classes that don't inherit QObject
Qt | Namespace for miscellaneous identifiers that need to be global-like
QUrl | URL parser and simplifies working with URLs
QUrlInfo | Stores information about URLs
QUrlOperator | Common operations on URLs
QValidator | Validation of input text
QVariant | Acts like a union for the most common Qt data types
QWindowsMime | Maps open-standard MIME to Window Clipboard formats