富文本处理
The Scribe framework provides a set of classes for reading and manipulating structured rich text documents. Unlike previous rich text support in Qt, the new classes are centered around the QTextDocument class rather than raw textual information. This enables the developer to create and modify structured rich text documents without having to prepare content in an intermediate markup format.
The information within a document can be accessed via two complementary interfaces: A cursor-based interface is used for editing, and a read-only hierarchical interface provides a high level overview of the document structure. The main advantage of the cursor-based interface is that the text can be edited using operations that mimic a user's interaction with an editor, without losing the underlying structure of the document. The read-only hierarchical interface is most useful when performing operations such as searching and document export.
This document is divided up into chapters for convenient reference:
- Rich Text Document Structure outlines the different kinds of elements in a QTextDocument , and describes how they are arranged in a document structure.
- The QTextCursor Interface explains how rich text documents can be edited using the cursor-based interface.
- Document Layouts briefly explains the role of document layouts.
- Common Rich Text Editing Tasks examines some common tasks that involve reading or manipulating rich text documents.
- Advanced Rich Text Processing examines advanced rich text editing tasks.
- 支持的 HTML 子集 lists the HTML tags supported by QTextDocument .
Rich Text Processing APIs
Qt provides an extensive collection of classes for parsing, rendering manipulating and editing rich text.
Abstract base class used to implement custom layouts for QTextDocuments |
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Specifies a font used for drawing text |
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用于 QTextDocument 的纯文本布局实现 |
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用于编辑和显示纯文本的 Widget |
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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 |
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用于 QTextDocument 中文本片段的容器 |
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Formatting information for blocks of text in a QTextDocument |
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Container for text blocks within a QTextDocument |
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Used to associate custom data with blocks of text |
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带 Hypertext (超文本) 导航的富文本浏览器 |
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Formatting information for characters in a QTextDocument |
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Offers an API to access and modify QTextDocuments |
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保持格式化文本 |
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表示一块来自 QTextDocument 的格式化文本 |
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Format-independent interface for writing a QTextDocument to files or other devices |
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用于编辑和显示纯文本 富文本两者的 Widget |
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Formatting information for a QTextDocument |
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Holds a piece of text in a QTextDocument with a single QTextCharFormat |
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Represents a frame in a QTextDocument |
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Formatting information for frames in a QTextDocument |
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Formatting information for images in a QTextDocument |
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Represents an inline object in a QAbstractTextDocumentLayout and its implementations |
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Used to lay out and render text |
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Encapsulates the different types of length used in a QTextDocument |
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Represents a line of text inside a QTextLayout |
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Decorated list of items in a QTextDocument |
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Formatting information for lists in a QTextDocument |
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Base class for different kinds of objects that can group parts of a QTextDocument together |
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一般富文本特性的描述 |
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Represents a table in a QTextDocument |
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Represents the properties of a cell in a QTextTable |
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Formatting information for table cells in a QTextDocument |
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Formatting information for tables in a QTextDocument |
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Iterator for reading the contents of a QTextFrame |
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QTextBlock::iterator class provides an iterator for reading the contents of a QTextBlock |