QPlainTextDocumentLayout Class
The QPlainTextDocumentLayout class implements a plain text layout for QTextDocument. More...
| Header: | #include <QPlainTextDocumentLayout> |
| qmake: | QT += widgets |
| Since: | Qt 4.4 |
| Inherits: | QAbstractTextDocumentLayout |
This class was introduced in Qt 4.4.
Properties
- cursorWidth : int
Public Functions
| QPlainTextDocumentLayout(QTextDocument *document) | |
| virtual | ~QPlainTextDocumentLayout() |
| int | cursorWidth() const |
| void | ensureBlockLayout(const QTextBlock &block) const |
| void | requestUpdate() |
| void | setCursorWidth(int width) |
Reimplemented Public Functions
| virtual QRectF | blockBoundingRect(const QTextBlock &block) const override |
| virtual QSizeF | documentSize() const override |
| virtual void | draw(QPainter *, const PaintContext &) override |
| virtual QRectF | frameBoundingRect(QTextFrame *) const override |
| virtual int | hitTest(const QPointF &, Qt::HitTestAccuracy) const override |
| virtual int | pageCount() const override |
Reimplemented Protected Functions
| virtual void | documentChanged(int from, int charsRemoved, int charsAdded) override |
Detailed Description
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.
Property Documentation
cursorWidth : int
This property specifies the width of the cursor in pixels. The default value is 1.
Access functions:
| int | cursorWidth() const |
| void | setCursorWidth(int width) |
Member Function Documentation
QPlainTextDocumentLayout::QPlainTextDocumentLayout(QTextDocument *document)
Constructs a plain text document layout for the text document.
[virtual] QPlainTextDocumentLayout::~QPlainTextDocumentLayout()
Destructs a plain text document layout.
[override virtual] QRectF QPlainTextDocumentLayout::blockBoundingRect(const QTextBlock &block) const
Reimplements: QAbstractTextDocumentLayout::blockBoundingRect(const QTextBlock &block) const.
[override virtual protected] void QPlainTextDocumentLayout::documentChanged(int from, int charsRemoved, int charsAdded)
Reimplements: QAbstractTextDocumentLayout::documentChanged(int position, int charsRemoved, int charsAdded).
[override virtual] QSizeF QPlainTextDocumentLayout::documentSize() const
Reimplements: QAbstractTextDocumentLayout::documentSize() const.
[override virtual] void QPlainTextDocumentLayout::draw(QPainter *, const PaintContext &)
Reimplements: QAbstractTextDocumentLayout::draw(QPainter *painter, const PaintContext &context).
void QPlainTextDocumentLayout::ensureBlockLayout(const QTextBlock &block) const
Ensures that block has a valid layout
[override virtual] QRectF QPlainTextDocumentLayout::frameBoundingRect(QTextFrame *) const
Reimplements: QAbstractTextDocumentLayout::frameBoundingRect(QTextFrame *frame) const.
[override virtual] int QPlainTextDocumentLayout::hitTest(const QPointF &, Qt::HitTestAccuracy) const
Reimplements: QAbstractTextDocumentLayout::hitTest(const QPointF &point, Qt::HitTestAccuracy accuracy) const.
[override virtual] int QPlainTextDocumentLayout::pageCount() const
Reimplements: QAbstractTextDocumentLayout::pageCount() const.
void QPlainTextDocumentLayout::requestUpdate()
Requests a complete update on all views.