QTextLength Class
The QTextLength class encapsulates the different types of length used in a QTextDocument. More...
Header: | #include <QTextLength> |
qmake: | QT += gui |
Note: All functions in this class are reentrant.
Public Types
enum | Type { VariableLength, FixedLength, PercentageLength } |
Public Functions
QTextLength() | |
QTextLength(QTextLength::Type type, qreal value) | |
qreal | rawValue() const |
QTextLength::Type | type() const |
qreal | value(qreal maximumLength) const |
QVariant | operator QVariant() const |
bool | operator!=(const QTextLength &other) const |
bool | operator==(const QTextLength &other) const |
Detailed Description
The QTextLength class encapsulates the different types of length used in a QTextDocument.
When we specify a value for the length of an element in a text document, we often need to provide some other information so that the length is used in the way we expect. For example, when we specify a table width, the value can represent a fixed number of pixels, or it can be a percentage value. This information changes both the meaning of the value and the way it is used.
Generally, this class is used to specify table widths. These can be specified either as a fixed amount of pixels, as a percentage of the containing frame's width, or by a variable width that allows it to take up just the space it requires.
See also QTextTable.
Member Type Documentation
enum QTextLength::Type
This enum describes the different types a length object can have.
Constant | Value | Description |
---|---|---|
QTextLength::VariableLength | 0 | The width of the object is variable |
QTextLength::FixedLength | 1 | The width of the object is fixed |
QTextLength::PercentageLength | 2 | The width of the object is in percentage of the maximum width |
See also type().
Member Function Documentation
QTextLength::QTextLength()
Default constructs an instance of QTextLength.
QTextLength::QTextLength(QTextLength::Type type, qreal value)
Default constructs an instance of QTextLength.
qreal QTextLength::rawValue() const
QTextLength::Type QTextLength::type() const
qreal QTextLength::value(qreal maximumLength) const
QVariant QTextLength::operator QVariant() const
Returns the text length as a QVariant