QTextDocument

QTextDocument is a class in the Qt framework that represents a document in a rich text format. It acts as the model for text editors, providing a structured way to store and manage rich text content, including text, images, tables, and formatting information. QTextDocument is a fundamental component for building text-editing applications with Qt.

The document is organized into a tree of elements, such as paragraphs, tables, and lists. Each element has associated formatting properties, like font, color, and alignment. This hierarchical structure allows for complex document layouts and efficient manipulation of content. It supports undo/redo operations and provides mechanisms for cursor navigation and text selection.

QTextDocument is designed to be independent of any specific user interface. This separation of concerns means that the document model can be used with different view widgets, such as QTextEdit for standard editing or QGraphicsScene for custom rendering. This flexibility makes it suitable for a wide range of applications, from simple text editors to complex document processing tools. It also supports features like pagination and printing.