QGlyphRun Class

Member Function Documentation

QGlyphRun::QGlyphRun()

Constructs an empty QGlyphRun object.

QGlyphRun::QGlyphRun(const QGlyphRun &other)

Constructs a QGlyphRun object which is a copy of other.

[noexcept] QGlyphRun::~QGlyphRun()

Destroys the QGlyphRun.

QRectF QGlyphRun::boundingRect() const

Returns the smallest rectangle that contains all glyphs in this QGlyphRun. If a bounding rect has been set using setBoundingRect(), then this will be returned. Otherwise the bounding rect will be calculated based on the font metrics of the glyphs in the glyph run.

See also setBoundingRect().

void QGlyphRun::clear()

Clears all data in the QGlyphRun object.

QGlyphRun::GlyphRunFlags QGlyphRun::flags() const

Returns the flags set for this QGlyphRun.

See also setFlags(), setFlag(), and setFlag().

QList<quint32> QGlyphRun::glyphIndexes() const

Returns the glyph indexes for this QGlyphRun object.

See also setGlyphIndexes() and setPositions().

bool QGlyphRun::isEmpty() const

Returns true if the QGlyphRun does not contain any glyphs.

bool QGlyphRun::isRightToLeft() const

Returns true if this QGlyphRun contains glyphs that are painted from the right to the left.

See also setRightToLeft() and flags().

bool QGlyphRun::overline() const

Returns true if this QGlyphRun should be painted with an overline decoration.

See also setOverline() and flags().

QList<QPointF> QGlyphRun::positions() const

Returns the position of the edge of the baseline for each glyph in this set of glyph indexes.

See also setPositions().

QRawFont QGlyphRun::rawFont() const

Returns the font selected for this QGlyphRun object.

See also setRawFont().

void QGlyphRun::setBoundingRect(const QRectF &boundingRect)

Sets the bounding rect of the glyphs in this QGlyphRun to be boundingRect. This rectangle will be returned by boundingRect() unless it is null, in which case the bounding rectangle of the glyphs in the glyph run will be returned instead.

In order to support such a case (an example is selections which should be drawn with a different color than the main text color), it is necessary to clip the painting mechanism to the rectangle returned from boundingRect() to avoid drawing the entire ligature glyph.

See also boundingRect().

void QGlyphRun::setFlag(QGlyphRun::GlyphRunFlag flag, bool enabled = true)

If enabled is true, then flag is enabled; otherwise, it is disabled.

See also flags() and setFlags().

void QGlyphRun::setFlags(QGlyphRun::GlyphRunFlags flags)

Sets the flags of this QGlyphRun to flags.

See also setFlag() and flags().

void QGlyphRun::setGlyphIndexes(const QList<quint32> &glyphIndexes)

Set the glyph indexes for this QGlyphRun object to glyphIndexes. The glyph indexes must be valid for the selected font.

See also glyphIndexes().

void QGlyphRun::setOverline(bool overline)

Indicates that this QGlyphRun should be painted with an overline decoration if overline is true. Otherwise the QGlyphRun should be painted with no overline decoration.

See also overline(), setFlag(), and setFlags().

void QGlyphRun::setPositions(const QList<QPointF> &positions)

Sets the positions of the edge of the baseline for each glyph in this set of glyph indexes to positions.

See also positions().

void QGlyphRun::setRawData(const quint32 *glyphIndexArray, const QPointF *glyphPositionArray, int size)

Sets the glyph indexes and positions of this QGlyphRun to use the first size elements in the arrays glyphIndexArray and glyphPositionArray. The data is not copied. The caller must guarantee that the arrays are not deleted as long as this QGlyphRun and any copies of it exists.

See also setGlyphIndexes() and setPositions().

void QGlyphRun::setRawFont(const QRawFont &rawFont)

Sets the font in which to look up the glyph indexes to the rawFont specified.

See also rawFont() and setGlyphIndexes().

void QGlyphRun::setRightToLeft(bool rightToLeft)

Indicates that this QGlyphRun contains glyphs that should be ordered from the right to left if rightToLeft is true. Otherwise the order of the glyphs is assumed to be left to right.

See also isRightToLeft(), setFlag(), and setFlags().

[since 6.5] void QGlyphRun::setSourceString(const QString &sourceString)

Set the string corresponding to the glyph run to sourceString. If set, the indexes returned by stringIndexes() should be indexes into this string.

This function was introduced in Qt 6.5.

See also sourceString() and stringIndexes().

void QGlyphRun::setStrikeOut(bool strikeOut)

Indicates that this QGlyphRun should be painted with an strike out decoration if strikeOut is true. Otherwise the QGlyphRun should be painted with no strike out decoration.

See also strikeOut(), setFlag(), and setFlags().

[since 6.5] void QGlyphRun::setStringIndexes(const QList<qsizetype> &stringIndexes)

Sets the list of string indexes corresponding to the glyph indexes to stringIndexes

See stringIndexes() for more details on the conventions of this list.

This function was introduced in Qt 6.5.

See also stringIndexes() and sourceString().

void QGlyphRun::setUnderline(bool underline)

Indicates that this QGlyphRun should be painted with an underline decoration if underline is true. Otherwise the QGlyphRun should be painted with no underline decoration.

See also underline(), setFlag(), and setFlags().

[since 6.5] QString QGlyphRun::sourceString() const

Returns the string corresponding to the glyph run, if the glyph run has been created from a string and the string has been requested from the layout.

This function was introduced in Qt 6.5.

See also setSourceString(), stringIndexes(), and QTextLayout::glyphRuns().

bool QGlyphRun::strikeOut() const

Returns true if this QGlyphRun should be painted with a strike out decoration.

See also setStrikeOut() and flags().

[since 6.5] QList<qsizetype> QGlyphRun::stringIndexes() const

Returns the string indexes corresponding to each glyph index, if the glyph run has been constructed from a string and string indexes have been requested from the layout. In this case, the length of the returned vector will correspond to the length of glyphIndexes(). In other cases, it will be empty.

Since a single glyph may correspond to multiple characters in the source string, there may be gaps in the list of string indexes. For instance, if the string "first" is processed by a font which contains a ligature for the character pair "fi", then the five character string will generate a glyph run consisting of only four glyphs. Then the glyph indexes may in this case be (1, 2, 3, 4) (four arbitrary glyph indexes) whereas the string indexes would be (0, 2, 3, 4). The glyphs are in the logical order of the string, thus it is implied that the first glyphs spans characters 0 and 1 in this case.

Inversely, a single character may also generate multiple glyphs, in which case there will be duplicate entries in the list of string indexes.

The string indexes correspond to the string, optionally available through sourceString().

This function was introduced in Qt 6.5.

See also setStringIndexes(), sourceString(), and QTextLayout::glyphRuns().

[noexcept] void QGlyphRun::swap(QGlyphRun &other)

Swaps this glyph run instance with other. This operation is very fast and never fails.

bool QGlyphRun::underline() const

Returns true if this QGlyphRun should be painted with an underline decoration.

See also setUnderline() and flags().

bool QGlyphRun::operator!=(const QGlyphRun &other) const

Compares other to this QGlyphRun object. Returns true if any of the list of glyph indexes, the list of positions or the font are different, otherwise returns false.

QGlyphRun &QGlyphRun::operator=(const QGlyphRun &other)

Assigns other to this QGlyphRun object.

bool QGlyphRun::operator==(const QGlyphRun &other) const

Compares other to this QGlyphRun object. Returns true if the list of glyph indexes, the list of positions and the font are all equal, otherwise returns false.