QFontInfo Class Reference
^{^{[

QtGui

module]}}

The QFontInfo class provides general information about fonts. 更多...

方法

__init__ ( self , QFont)
__init__ ( self , QFontInfo)
bool bold ( self )
bool exactMatch ( self )
QString family ( self )
bool fixedPitch ( self )
bool italic ( self )
int pixelSize ( self )
int pointSize ( self )
float pointSizeF ( self )
bool rawMode ( self )
QFont.Style style ( self )
QFont.StyleHint styleHint ( self )
QString styleName ( self )
int weight ( self )

详细描述

The QFontInfo class provides general information about fonts.

The QFontInfo class provides the same access functions as QFont ，如 family (), pointSize (), italic (), weight (), fixedPitch (), styleHint () etc. But whilst the QFont access functions return the values that were set, a QFontInfo 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 and QFontInfo.pointSize () returns 24.

There are three ways to create a QFontInfo object.

Calling the QFontInfo constructor with a QFont 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 is not 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.)
QWidget.fontInfo () 返回 the font info for a widget's font. This is equivalent to calling QFontInfo(widget->font()). If the widget's font is changed later, the font info object is not updated.
QPainter.fontInfo () returns the font info for a painter's current font. If the painter's font is changed later, the font info object is not updated.

方法文档编制

QFontInfo.init ( self , QFont )

Constructs a font info object for font .

The font must be screen-compatible, i.e. a font you use when drawing text in widgets or pixmaps , not QPicture or QPrinter .

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.

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

QFontInfo.init ( self , QFontInfo )

构造副本为 fi .

bool QFontInfo.bold ( self )

返回 true 若 weight () would return a value greater than QFont.Normal ；否则返回 false.

另请参阅 weight () 和 QFont.bold ().

bool QFontInfo.exactMatch ( self )

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

另请参阅 QFont.exactMatch ().

QString QFontInfo.family ( self )

Returns the family name of the matched window system font.

另请参阅 QFont.family ().

bool QFontInfo.fixedPitch ( self )

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

另请参阅 QFont.fixedPitch ().

bool QFontInfo.italic ( self )

Returns the italic value of the matched window system font.

另请参阅 QFont.italic ().

int QFontInfo.pixelSize ( self )

Returns the pixel size of the matched window system font.

另请参阅 QFont.pointSize ().

int QFontInfo.pointSize ( self )

Returns the point size of the matched window system font.

另请参阅 pointSizeF () 和 QFont.pointSize ().

float QFontInfo.pointSizeF ( self )

Returns the point size of the matched window system font.

另请参阅 QFont.pointSizeF ().

bool QFontInfo.rawMode ( self )

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

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

另请参阅 QFont.rawMode ().

QFont.Style QFontInfo.style ( self )

Returns the style value of the matched window system font.

另请参阅 QFont.style ().

QFont.StyleHint QFontInfo.styleHint ( self )

Returns the style of the matched window system font.

Currently only returns the style hint set in QFont .

另请参阅 QFont.styleHint () 和 QFont.StyleHint .

QString QFontInfo.styleName ( self )

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

该函数在 Qt 4.8 引入。

另请参阅 QFont.styleName ().

int QFontInfo.weight ( self )

Returns the weight of the matched window system font.

另请参阅 QFont.weight () and bold ().

QFontInfo Class Reference [ QtGui module]

方法