Contents

• Public Functions
• Detailed Description

Detailed Description

TheQFontInfo class provides general information about fonts.

TheQFontInfo class provides the same access functions asQFont, e.g.family(),pointSize(),italic(),weight(),fixedPitch(),styleHint() etc. But whilst theQFont access functions return the values that were set, aQFontInfo object returns the values that apply to the font that will actually be used to draw the text.

For example, when the program asks for a 25pt Courier font on a machine that has a non-scalable 24pt Courier font,QFont will (normally) use the 24pt Courier for rendering. In this case,QFont::pointSize() returns 25 andQFontInfo::pointSize() returns 24.

There are three ways to create aQFontInfo object.

1. Calling theQFontInfo constructor with aQFont creates a font info object for a screen-compatible font, i.e. the font cannot be a printer font. If the font is changed later, the font info object isnot updated.

   (Note: If you use a printer font the values returned may be inaccurate. Printer fonts are not always accessible so the nearest screen font is used if a printer font is supplied.)

2. QWidget::fontInfo() returns the font info for a widget's font. This is equivalent to callingQFontInfo(widget->font()). If the widget's font is changed later, the font info object isnot updated.
3. QPainter::fontInfo() returns the font info for a painter's current font. If the painter's font is changed later, the font info object isnot updated.

Member Function Documentation

QFontInfo::QFontInfo(constQFont & font)

Constructs a font info object forfont.

The font must be screen-compatible, i.e. a font you use when drawing text inwidgets orpixmaps, notQPicture orQPrinter.

The font info object holds the information for the font that is passed in the constructor at the time it is created, and is not updated if the font's attributes are changed later.

UseQPainter::fontInfo() to get the font info when painting. This will give correct results also when painting on paint device that is not screen-compatible.

QFontInfo::QFontInfo(constQFontInfo & fi)

Constructs a copy offi.

QFontInfo::~QFontInfo()

Destroys the font info object.

bool QFontInfo::bold() const

Returns true ifweight() would return a value greater thanQFont::Normal; otherwise returns false.

See alsoweight() andQFont::bold().

bool QFontInfo::exactMatch() const

Returns true if the matched window system font is exactly the same as the one specified by the font; otherwise returns false.

See alsoQFont::exactMatch().

QString QFontInfo::family() const

Returns the family name of the matched window system font.

See alsoQFont::family().

bool QFontInfo::fixedPitch() const

Returns the fixed pitch value of the matched window system font.

See alsoQFont::fixedPitch().

bool QFontInfo::italic() const

Returns the italic value of the matched window system font.

See alsoQFont::italic().

int QFontInfo::pixelSize() const

Returns the pixel size of the matched window system font.

See alsoQFont::pointSize().

int QFontInfo::pointSize() const

Returns the point size of the matched window system font.

See alsopointSizeF() andQFont::pointSize().

qreal QFontInfo::pointSizeF() const

Returns the point size of the matched window system font.

See alsoQFont::pointSizeF().

bool QFontInfo::rawMode() const

Returns true if the font is a raw mode font; otherwise returns false.

If it is a raw mode font, all other functions inQFontInfo will return the same values set in theQFont, regardless of the font actually used.

See alsoQFont::rawMode().

QFont::Style QFontInfo::style() const

Returns the style value of the matched window system font.

See alsoQFont::style().

QFont::StyleHint QFontInfo::styleHint() const

Returns the style of the matched window system font.

Currently only returns the style hint set inQFont.

See alsoQFont::styleHint() andQFont::StyleHint.

QString QFontInfo::styleName() const

Returns the style name of the matched window system font on system that supports it.

This function was introduced in Qt 4.8.

See alsoQFont::styleName().

int QFontInfo::weight() const

Returns the weight of the matched window system font.

See alsoQFont::weight() andbold().

QFontInfo & QFontInfo::operator=(constQFontInfo & fi)

Assigns the font info infi.