QPlainTextDocumentLayout Class
The QPlainTextDocumentLayout class implements a plain text layout for QTextDocument 更多...
| 头文件: | #include <QPlainTextDocumentLayout> |
| qmake: | QT += widgets |
| 开始支持版本: | Qt 4.4 |
| 基类: | QAbstractTextDocumentLayout |
属性
- cursorWidth : int
公有函数
| QPlainTextDocumentLayout(QTextDocument *document) | |
| ~QPlainTextDocumentLayout() | |
| int | cursorWidth() const |
| void | ensureBlockLayout(const QTextBlock &block) const |
| void | requestUpdate() |
| void | setCursorWidth(int width) |
重新实现的公有函数
| virtual QRectF | blockBoundingRect(const QTextBlock &block) const |
| virtual QSizeF | documentSize() const |
| virtual void | draw(QPainter *, const PaintContext &) |
| virtual QRectF | frameBoundingRect(QTextFrame *) const |
| virtual int | hitTest(const QPointF &, Qt::HitTestAccuracy) const |
| virtual int | pageCount() const |
- 15 个公有函数继承自 QAbstractTextDocumentLayout
重新实现的受保护函数
| virtual void | documentChanged(int from, int charsRemoved, int charsAdded) |
- 5 个受保护的函数继承自 QAbstractTextDocumentLayout
其他继承的成员
- 4 个信号继承自 QAbstractTextDocumentLayout
- 5 个受保护的函数继承自 QAbstractTextDocumentLayout
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. See QTextDocument::setDocumentLayout().
QPlainTextDocumentLayout uses the 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.
属性
cursorWidth : int
This property specifies the width of the cursor in pixels. The default value is 1.
访问函数:
| int | cursorWidth() const |
| void | setCursorWidth(int width) |
成员函数
QPlainTextDocumentLayout::QPlainTextDocumentLayout(QTextDocument *document)
Constructs a plain text document layout for the text document.
QPlainTextDocumentLayout::~QPlainTextDocumentLayout()
Destructs a plain text document layout.
[virtual] QRectF QPlainTextDocumentLayout::blockBoundingRect(const QTextBlock &block) const
重新实现 QAbstractTextDocumentLayout::blockBoundingRect().
[virtual protected] void QPlainTextDocumentLayout::documentChanged(int from, int charsRemoved, int charsAdded)
重新实现 QAbstractTextDocumentLayout::documentChanged().
[virtual] QSizeF QPlainTextDocumentLayout::documentSize() const
重新实现 QAbstractTextDocumentLayout::documentSize().
[virtual] void QPlainTextDocumentLayout::draw(QPainter *, const PaintContext &)
重新实现 QAbstractTextDocumentLayout::draw().
void QPlainTextDocumentLayout::ensureBlockLayout(const QTextBlock &block) const
Ensures that block has a valid layout
[virtual] QRectF QPlainTextDocumentLayout::frameBoundingRect(QTextFrame *) const
重新实现 QAbstractTextDocumentLayout::frameBoundingRect().
[virtual] int QPlainTextDocumentLayout::hitTest(const QPointF &, Qt::HitTestAccuracy) const
重新实现 QAbstractTextDocumentLayout::hitTest().
[virtual] int QPlainTextDocumentLayout::pageCount() const
重新实现 QAbstractTextDocumentLayout::pageCount().
void QPlainTextDocumentLayout::requestUpdate()
Requests a complete update on all views.