QFontInfo ¶

概要 ¶

详细描述 ¶

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, pointSize() returns 25 and pointSize() returns 24.

There are three ways to create a QFontInfo 对象。

1. 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.)

2. fontInfo() returns 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.

3. 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.

另请参阅

QFont QFontMetrics QFontDatabase

class QFontInfo ( arg__1 ) ¶

QFontInfo(arg__1)

参数

arg__1 – QFont

PySide2.QtGui.QFontInfo. bold ( ) ¶

返回类型

bool

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

另请参阅

weight() bold()

PySide2.QtGui.QFontInfo. exactMatch ( ) ¶

返回类型

bool

返回 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

exactMatch()

PySide2.QtGui.QFontInfo. family ( ) ¶

返回类型

unicode

Returns the family name of the matched window system font.

另请参阅

family()

PySide2.QtGui.QFontInfo. fixedPitch ( ) ¶

返回类型

bool

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

另请参阅

fixedPitch()

PySide2.QtGui.QFontInfo. italic ( ) ¶

返回类型

bool

Returns the italic value of the matched window system font.

另请参阅

italic()

PySide2.QtGui.QFontInfo. overline ( ) ¶

返回类型

bool

Returns the overline value of the matched window system font.

Here we read the overline flag directly from the QFont . This is OK for X11 and for Windows because we always get what we want.

另请参阅

overline()

PySide2.QtGui.QFontInfo. pixelSize ( ) ¶

返回类型

int

Returns the pixel size of the matched window system font.

另请参阅

pointSize()

PySide2.QtGui.QFontInfo. pointSize ( ) ¶

返回类型

int

Returns the point size of the matched window system font.

另请参阅

pointSizeF() pointSize()

PySide2.QtGui.QFontInfo. pointSizeF ( ) ¶

返回类型

qreal

Returns the point size of the matched window system font.

另请参阅

pointSizeF()

PySide2.QtGui.QFontInfo. rawMode ( ) ¶

返回类型

bool

返回 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

rawMode()

PySide2.QtGui.QFontInfo. strikeOut ( ) ¶

返回类型

bool

Returns the strikeout value of the matched window system font.

This is OK for X11 and for Windows because we always get what we want.

另请参阅

strikeOut()

PySide2.QtGui.QFontInfo. style ( ) ¶

返回类型

Style

Returns the style value of the matched window system font.

另请参阅

style()

PySide2.QtGui.QFontInfo. styleHint ( ) ¶

返回类型

StyleHint

Returns the style of the matched window system font.

Currently only returns the style hint set in QFont .

另请参阅

styleHint() StyleHint

PySide2.QtGui.QFontInfo. styleName ( ) ¶

返回类型

unicode

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

另请参阅

styleName()

PySide2.QtGui.QFontInfo. swap ( other ) ¶

参数

other – QFontInfo

Swaps this font info instance with other 。此函数非常快，且从不失败。

PySide2.QtGui.QFontInfo. underline ( ) ¶

返回类型

bool

Returns the underline value of the matched window system font.

Here we read the underline flag directly from the QFont . This is OK for X11 and for Windows because we always get what we want.

另请参阅

underline()

PySide2.QtGui.QFontInfo. weight ( ) ¶

返回类型

int

Returns the weight of the matched window system font.

另请参阅

weight() bold()