内容

• 特性
• 公共函数
• 重实现公共函数
• 静态公共成员
• 重实现保护函数
• 详细描述

QPlainTextDocumentLayout 类

The QPlainTextDocumentLayout class implements a plain text layout for QTextDocument . 更多...

头：	#include <QPlainTextDocumentLayout>
qmake:	QT += widgets
Since:	Qt 4.4
继承：	QAbstractTextDocumentLayout

• 所有成员列表，包括继承成员
• 过时成员

特性

• cursorWidth : int

• 1 特性继承自 QObject

公共函数

	QPlainTextDocumentLayout (QTextDocument * document )
virtual	~QPlainTextDocumentLayout ()
int	cursorWidth () const
void	ensureBlockLayout (const QTextBlock & block ) const
void	requestUpdate ()
void	setCursorWidth (int width )

重实现公共函数

virtual QRectF	blockBoundingRect (const QTextBlock & block ) const override
virtual QSizeF	documentSize () const override
virtual void	draw ( QPainter * , const QAbstractTextDocumentLayout::PaintContext & ) override
virtual QRectF	frameBoundingRect ( QTextFrame * ) const override
virtual int	hitTest ( const QPointF & , Qt::HitTestAccuracy ) const override
virtual int	pageCount () const override

• 15 公共函数继承自 QAbstractTextDocumentLayout
• 31 公共函数继承自 QObject

静态公共成员

const QMetaObject

staticMetaObject

• 9 静态公共成员继承自 QObject

重实现保护函数

virtual void

documentChanged (int from , int charsRemoved , int charsAdded ) override

• 5 保护函数继承自 QAbstractTextDocumentLayout
• 9 保护函数继承自 QObject

额外继承成员

• 1 公共槽继承自 QObject
• 4 信号继承自 QAbstractTextDocumentLayout
• 2 信号继承自 QObject
• 5 保护函数继承自 QAbstractTextDocumentLayout
• 9 保护函数继承自 QObject

详细描述

The QPlainTextDocumentLayout class implements a plain text layout for QTextDocument .

A QPlainTextDocumentLayout is required for text documents that can be display or edited in a QPlainTextEdit 。见 QTextDocument::setDocumentLayout ().

QPlainTextDocumentLayout 使用 QAbstractTextDocumentLayout API that QTextDocument requires, but redefines it partially in order to support plain text better. For instances, it does not operate on vertical pixels, but on paragraphs (called blocks) instead. The height of a document is identical to the number of paragraphs it contains. The layout also doesn't support tables or nested frames, or any sort of advanced text layout that goes beyond a list of paragraphs with syntax highlighting.

特性文档编制

cursorWidth : int

此特性指定光标的宽度 (以像素为单位)。默认值为 1。

访问函数：

int	cursorWidth () const
void	setCursorWidth (int width )

成员函数文档编制

QPlainTextDocumentLayout:: QPlainTextDocumentLayout ( QTextDocument * document )

构造纯文本文档布局为文本 document .

[virtual] QPlainTextDocumentLayout:: ~QPlainTextDocumentLayout ()

销毁纯文本文档布局。

[override virtual] QRectF QPlainTextDocumentLayout:: blockBoundingRect (const QTextBlock & block ) const

重实现自 QAbstractTextDocumentLayout::blockBoundingRect ().

[override virtual protected] void QPlainTextDocumentLayout:: documentChanged ( int from , int charsRemoved , int charsAdded )

重实现自 QAbstractTextDocumentLayout::documentChanged ().

[override virtual] QSizeF QPlainTextDocumentLayout:: documentSize () const

重实现自 QAbstractTextDocumentLayout::documentSize ().

[override virtual] void QPlainTextDocumentLayout:: draw ( QPainter * , const QAbstractTextDocumentLayout::PaintContext & )

重实现自 QAbstractTextDocumentLayout::draw ().

void QPlainTextDocumentLayout:: ensureBlockLayout (const QTextBlock & block ) const

Ensures that block has a valid layout

[override virtual] QRectF QPlainTextDocumentLayout:: frameBoundingRect ( QTextFrame * ) const

重实现自 QAbstractTextDocumentLayout::frameBoundingRect ().

[override virtual] int QPlainTextDocumentLayout:: hitTest ( const QPointF & , Qt::HitTestAccuracy ) const

重实现自 QAbstractTextDocumentLayout::hitTest ().

[override virtual] int QPlainTextDocumentLayout:: pageCount () const

重实现自 QAbstractTextDocumentLayout::pageCount ().

void QPlainTextDocumentLayout:: requestUpdate ()

请求对所有视图，进行完整更新。