| QAbstractTextDocumentLayout | The QAbstractTextDocumentLayout class is an abstract base class used to implement custom layouts for QTextDocuments. |
| QByteArray | The QByteArray class provides an array of bytes. |
| QByteArrayMatcher | The QByteArrayMatcher class holds a sequence of bytes that can be quickly matched in a byte array. |
| QChar | The QChar class provides a 16-bit Unicode character. |
| QFont | The QFont class specifies a font used for drawing text. |
| QFontComboBox | The QFontComboBox widget is a combobox that lets the user select a font family. |
| QFontDatabase | The QFontDatabase class provides information about the fonts available in the underlying window system. |
| QFontDialog | The QFontDialog class provides a dialog widget for selecting a font. |
| QFontInfo | The QFontInfo class provides general information about fonts. |
| QFontMetrics | The QFontMetrics class provides font metrics information. |
| QFontMetricsF | The QFontMetricsF class provides font metrics information. |
| QLabel | The QLabel widget provides a text or image display. |
| QLatin1Char | The QLatin1Char class provides an 8-bit ASCII/Latin-1 character. |
| QLatin1String | The QLatin1String class provides a thin wrapper around an ASCII/Latin-1 encoded string literal. |
| QLocale | The QLocale class converts between numbers and their string representations in various languages. |
| QString | The QString class provides a Unicode character string. |
| QStringList | The QStringList class provides a list of strings. |
| QStringMatcher | The QStringMatcher class holds a sequence of characters that can be quickly matched in a Unicode string. |
| QStringRef | The QStringRef class provides a thin wrapper around QString substrings. |
| QSyntaxHighlighter | The QSyntaxHighlighter class allows you to define syntax highlighting rules, and in addition you can use the class to query a document's current formatting or user data. |
| QTextBlock | The QTextBlock class provides a container for text fragments in a QTextDocument. |
| QTextBlockFormat | The QTextBlockFormat class provides formatting information for blocks of text in a QTextDocument. |
| QTextBlockGroup | The QTextBlockGroup class provides a container for text blocks within a QTextDocument. |
| QTextBlockUserData | The QTextBlockUserData class is used to associate custom data with blocks of text. |
| QTextBrowser | The QTextBrowser class provides a rich text browser with hypertext navigation. |
| QTextCharFormat | The QTextCharFormat class provides formatting information for characters in a QTextDocument. |
| QTextCursor | The QTextCursor class offers an API to access and modify QTextDocuments. |
| QTextDocument | The QTextDocument class holds formatted text that can be viewed and edited using a QTextEdit. |
| QTextDocumentFragment | The QTextDocumentFragment class represents a piece of formatted text from a QTextDocument. |
| QTextEdit | The QTextEdit class provides a widget that is used to edit and display both plain and rich text. |
| QTextFormat | The QTextFormat class provides formatting information for a QTextDocument. |
| QTextFragment | The QTextFragment class holds a piece of text in a QTextDocument with a single QTextCharFormat. |
| QTextFrame | The QTextFrame class represents a frame in a QTextDocument. |
| QTextFrameFormat | The QTextFrameFormat class provides formatting information for frames in a QTextDocument. |
| QTextIStream | The QTextIStream class is a convenience class for input streams. |
| QTextImageFormat | The QTextImageFormat class provides formatting information for images in a QTextDocument. |
| QTextInlineObject | The QTextInlineObject class represents an inline object in a QTextLayout. |
| QTextLayout | The QTextLayout class is used to lay out and paint a single paragraph of text. |
| QTextLength | The QTextLength class encapsulates the different types of length used in a QTextDocument. |
| QTextLine | The QTextLine class represents a line of text inside a QTextLayout. |
| QTextList | The QTextList class provides a decorated list of items in a QTextDocument. |
| QTextListFormat | The QTextListFormat class provides formatting information for lists in a QTextDocument. |
| QTextOStream | The QTextOStream class is a convenience class for output streams. |
| QTextObject | The QTextObject class is a base class for different kinds of objects that can group parts of a QTextDocument together. |
| QTextOption | The QTextOption class provides a description of general rich text properties. |
| QTextStream | The QTextStream class provides a convenient interface for reading and writing text. |
| QTextTable | The QTextTable class represents a table in a QTextDocument. |
| QTextTableCell | The QTextTableCell class represents the properties of a cell in a QTextTable. |
| QTextTableFormat | The QTextTableFormat class provides formatting information for tables in a QTextDocument. |
| QTextFrame::iterator | The QTextFrame::iterator class provides an iterator for reading the contents of a QTextFrame. |