QTextBlockUserData Class
The QTextBlockUserData class is used to associate custom data with blocks of text. 更多...
| 头文件: | #include <QTextBlockUserData> |
| qmake: | QT += gui |
| 开始支持版本: | Qt 4.1 |
Note: All functions in this class are reentrant.
公有函数
| virtual | ~QTextBlockUserData() |
详细描述
The QTextBlockUserData class is used to associate custom data with blocks of text.
QTextBlockUserData provides an abstract interface for container classes that are used to associate application-specific user data with text blocks in a QTextDocument.
Generally, subclasses of this class provide functions to allow data to be stored and retrieved, and instances are attached to blocks of text using QTextBlock::setUserData(). This makes it possible to store additional data per text block in a way that can be retrieved safely by the application.
Each subclass should provide a reimplementation of the destructor to ensure that any private data is automatically cleaned up when user data objects are deleted.
参见 QTextBlock.