QFont ¶

概要 ¶

详细描述 ¶

QFont can be regarded as a query for one or more fonts on the system.

When you create a QFont object you specify various attributes that you want the font to have. Qt will use the font with the specified attributes, or if no matching font exists, Qt will use the closest matching installed font. The attributes of the font that is actually used are retrievable from a QFontInfo object. If the window system provides an exact match exactMatch() 返回 true 。使用 QFontMetricsF to get measurements, e.g. the pixel length of a string using width() .

Attributes which are not specifically set will not affect the font selection algorithm, and default values will be preferred instead.

To load a specific physical font, typically represented by a single file, use QRawFont 代替。

注意： QGuiApplication instance must exist before a QFont can be used. You can set the application’s default font with setFont() .

If a chosen font does not include all the characters that need to be displayed, QFont will try to find the characters in the nearest equivalent fonts. When a QPainter draws a character from a font the QFont will report whether or not it has the character; if it does not, QPainter will draw an unfilled square.

Create QFonts like this:

serifFont = QFont("Times", 10, QFont.Bold)
sansFont = QFont("Helvetica [Cronyx]", 12)
											

The attributes set in the constructor can also be set later, e.g. setFamily() , setPointSize() , setPointSizeF() , setWeight() and setItalic() . The remaining attributes must be set after contstruction, e.g. setBold() , setUnderline() , setOverline() , setStrikeOut() and setFixedPitch() . QFontInfo objects should be created after the font’s attributes have been set. A QFontInfo object will not change, even if you change the font’s attributes. The corresponding “get” functions, e.g. family() , pointSize() , etc., return the values that were set, even though the values used may differ. The actual values are available from a QFontInfo 对象。

If the requested font family is unavailable you can influence the font matching algorithm by choosing a particular StyleHint and StyleStrategy with setStyleHint() . The default family (corresponding to the current style hint) is returned by defaultFamily() .

You can provide substitutions for font family names using insertSubstitution() and insertSubstitutions() . Substitutions can be removed with removeSubstitutions() 。使用 substitute() to retrieve a family’s first substitute, or the family name itself if it has no substitutes. Use substitutes() to retrieve a list of a family’s substitutes (which may be empty). After substituting a font, you must trigger the updating of the font by destroying and re-creating all QFont 对象。

Every QFont has a key() which you can use, for example, as the key in a cache or dictionary. If you want to store a user’s font preferences you could use QSettings , writing the font information with toString() and reading it back with fromString() . The operator<<() and operator>>() functions are also available, but they work on a data stream.

It is possible to set the height of characters shown on the screen to a specified number of pixels with setPixelSize() ; however using setPointSize() has a similar effect and provides device independence.

Loading fonts can be expensive, especially on X11. QFont contains extensive optimizations to make the copying of QFont objects fast, and to cache the results of the slow window system functions it depends upon.

The font matching algorithm works as follows:

1. The specified font families (set by setFamilies() ) are searched for.

2. If not found, then if set the specified font family exists and can be used to represent the writing system in use, it will be selected.

3. If not, a replacement font that supports the writing system is selected. The font matching algorithm will try to find the best match for all the properties set in the QFont . How this is done varies from platform to platform.

4. If no font exists on the system that can support the text, then special “missing character” boxes will be shown in its place.

注意

If the selected font, though supporting the writing system in general, is missing glyphs for one or more specific characters, then Qt will try to find a fallback font for this or these particular characters. This feature can be disabled using NoFontMerging style strategy.

In Windows a request for the “Courier” font is automatically changed to “Courier New”, an improved version of Courier that allows for smooth scaling. The older “Courier” bitmap font can be selected by setting the PreferBitmap style strategy (see setStyleStrategy() ).

Once a font is found, the remaining attributes are matched in order of priority:

1. fixedPitch()

2. pointSize() (see below)

3. weight()

4. style()

If you have a font which matches on family, even if none of the other attributes match, this font will be chosen in preference to a font which doesn’t match on family but which does match on the other attributes. This is because font family is the dominant search criteria.

The point size is defined to match if it is within 20% of the requested point size. When several fonts match and are only distinguished by point size, the font with the closest point size to the one requested will be chosen.

The actual family, font size, weight and other font attributes used for drawing text will depend on what’s available for the chosen family under the window system. A QFontInfo object can be used to determine the actual values used for drawing the text.

范例：

f = QFont("Helvetica")
											

If you had both an Adobe and a Cronyx Helvetica, you might get either.

f = QFont("Helvetica [Cronyx]")
											

You can specify the foundry you want in the family name. The font f in the above example will be set to “Helvetica [Cronyx]”.

To determine the attributes of the font actually used in the window system, use a QFontInfo object, e.g.

info = QFontInfo(f1)
family = info.family()
											

To find out font metrics use a QFontMetrics object, e.g.

fm = QFontMetrics(f1)
textWidthInPixels = fm.width("How many pixels wide is this text?")
textHeightInPixels = fm.height()
											

For more general information on fonts, see the comp.fonts FAQ . Information on encodings can be found from Roman Czyborra’s 页面。

另请参阅

QFontMetrics QFontInfo QFontDatabase 字符映射范例

class QFont ¶

QFont(font)

QFont(font, pd)

QFont(font, pd)

QFont(family[, pointSize=-1[, weight=-1[, italic=false]]])

param pd

QPaintDevice

param font

QFont

param italic

bool

param pointSize

int

param weight

int

param family

unicode

Constructs a font object that uses the application’s default font.

另请参阅

setFont() font()

Constructs a font that is a copy of font .

Constructs a font object with the specified family , pointSize , weight and italic settings.

若 pointSize is zero or negative, the point size of the font is set to a system-dependent default value. Generally, this is 12 points.

family name may optionally also include a foundry name, e.g. “Helvetica [Cronyx]”. If the family is available from more than one foundry and the foundry isn’t specified, an arbitrary foundry is chosen. If the family isn’t available a family will be set using the font matching algorithm.

另请参阅

Weight setFamily() setPointSize() setWeight() setItalic() setStyleHint() font()

PySide2.QtGui.QFont. StyleHint ¶

Style hints are used by the font matching algorithm to find an appropriate default family if a selected font family is not available.

常量	描述
QFont.AnyStyle	leaves the font matching algorithm to choose the family. This is the default.
QFont.SansSerif	the font matcher prefer sans serif fonts.
QFont.Helvetica	is a synonym for SansSerif .
QFont.Serif	the font matcher prefers serif fonts.
QFont.Times	is a synonym for Serif .
QFont.TypeWriter	the font matcher prefers fixed pitch fonts.
QFont.Courier	a synonym for TypeWriter .
QFont.OldEnglish	the font matcher prefers decorative fonts.
QFont.Decorative	is a synonym for OldEnglish .
QFont.Monospace	the font matcher prefers fonts that map to the CSS generic font-family ‘monospace’.
QFont.Fantasy	the font matcher prefers fonts that map to the CSS generic font-family ‘fantasy’.
QFont.Cursive	the font matcher prefers fonts that map to the CSS generic font-family ‘cursive’.
QFont.System	the font matcher prefers system fonts.

PySide2.QtGui.QFont. StyleStrategy ¶

The style strategy tells the font matching algorithm what type of fonts should be used to find an appropriate default family.

The following strategies are available:

常量	描述
QFont.PreferDefault	the default style strategy. It does not prefer any type of font.
QFont.PreferBitmap	prefers bitmap fonts (as opposed to outline fonts).
QFont.PreferDevice	prefers device fonts.
QFont.PreferOutline	prefers outline fonts (as opposed to bitmap fonts).
QFont.ForceOutline	forces the use of outline fonts.
QFont.NoAntialias	don’t antialias the fonts.
QFont.NoSubpixelAntialias	avoid subpixel antialiasing on the fonts if possible.
QFont.PreferAntialias	antialias if possible.
QFont.OpenGLCompatible	This style strategy has been deprecated. All fonts are OpenGL-compatible by default.
QFont.NoFontMerging	If the font selected for a certain writing system does not contain a character requested to draw, then Qt automatically chooses a similar looking font that contains the character. The flag disables this feature. Please note that enabling this flag will not prevent Qt from automatically picking a suitable font when the selected font does not support the writing system of the text.
QFont.PreferNoShaping	Sometimes, a font will apply complex rules to a set of characters in order to display them correctly. In some writing systems, such as Brahmic scripts, this is required in order for the text to be legible, but in e.g. Latin script, it is merely a cosmetic feature. The flag will disable all such features when they are not required, which will improve performance in most cases (since Qt 5.10).

Any of these may be OR-ed with one of these flags:

常量	描述
QFont.PreferMatch	prefer an exact match. The font matcher will try to use the exact font size that has been specified.
QFont.PreferQuality	prefer the best quality font. The font matcher will use the nearest standard point size that the font supports.
QFont.ForceIntegerMetrics	This style strategy has been deprecated. Use QFontMetrics to retrieve rounded font metrics.

PySide2.QtGui.QFont. HintingPreference ¶

This enum describes the different levels of hinting that can be applied to glyphs to improve legibility on displays where it might be warranted by the density of pixels.

常量	描述
QFont.PreferDefaultHinting	Use the default hinting level for the target platform.
QFont.PreferNoHinting	If possible, render text without hinting the outlines of the glyphs. The text layout will be typographically accurate and scalable, using the same metrics as are used e.g. when printing.
QFont.PreferVerticalHinting	If possible, render text with no horizontal hinting, but align glyphs to the pixel grid in the vertical direction. The text will appear crisper on displays where the density is too low to give an accurate rendering of the glyphs. But since the horizontal metrics of the glyphs are unhinted, the text’s layout will be scalable to higher density devices (such as printers) without impacting details such as line breaks.
QFont.PreferFullHinting	If possible, render text with hinting in both horizontal and vertical directions. The text will be altered to optimize legibility on the target device, but since the metrics will depend on the target size of the text, the positions of glyphs, line breaks, and other typographical detail will not scale, meaning that a text layout may look different on devices with different pixel densities.

Please note that this enum only describes a preference, as the full range of hinting levels are not supported on all of Qt’s supported platforms. The following table details the effect of a given hinting preference on a selected set of target platforms.

Windows Vista (w/o Platform Update) and earlier	Full hinting	Full hinting	Full hinting	Full hinting
Windows 7 and Windows Vista (w/Platform Update) and DirectWrite enabled in Qt	Full hinting	Vertical hinting	Vertical hinting	Full hinting
FreeType	Operating System setting	No hinting	Vertical hinting (light)	Full hinting
Cocoa on macOS	No hinting	No hinting	No hinting	No hinting

注意

Please be aware that altering the hinting preference on Windows is available through the DirectWrite font engine. This is available on Windows Vista after installing the platform update, and on Windows 7. In order to use this extension, configure Qt using -directwrite. The target application will then depend on the availability of DirectWrite on the target system.

PySide2.QtGui.QFont. Weight ¶

Qt uses a weighting scale from 0 to 99 similar to, but not the same as, the scales used in Windows or CSS. A weight of 0 will be thin, whilst 99 will be extremely black.

This enum contains the predefined font weights:

常量	描述
QFont.Thin	0
QFont.ExtraLight	12
QFont.Light	25
QFont.Normal	50
QFont.Medium	57
QFont.DemiBold	63
QFont.Bold	75
QFont.ExtraBold	81
QFont.Black	87

PySide2.QtGui.QFont. Style ¶

This enum describes the different styles of glyphs that are used to display text.

常量	描述
QFont.StyleNormal	Normal glyphs used in unstyled text.
QFont.StyleItalic	Italic glyphs that are specifically designed for the purpose of representing italicized text.
QFont.StyleOblique	Glyphs with an italic appearance that are typically based on the unstyled glyphs, but are not fine-tuned for the purpose of representing italicized text.

另请参阅

Weight

PySide2.QtGui.QFont. Stretch ¶

Predefined stretch values that follow the CSS naming convention. The higher the value, the more stretched the text is.

常量	描述
QFont.AnyStretch	0 Accept any stretch matched using the other QFont properties (added in Qt 5.8)
QFont.UltraCondensed	50
QFont.ExtraCondensed	62
QFont.Condensed	75
QFont.SemiCondensed	87
QFont.Unstretched	100
QFont.SemiExpanded	112
QFont.Expanded	125
QFont.ExtraExpanded	150
QFont.UltraExpanded	200

另请参阅

setStretch() stretch()

PySide2.QtGui.QFont. Capitalization ¶

Rendering option for text this font applies to.

常量	描述
QFont.MixedCase	This is the normal text rendering option where no capitalization change is applied.
QFont.AllUppercase	This alters the text to be rendered in all uppercase type.
QFont.AllLowercase	This alters the text to be rendered in all lowercase type.
QFont.SmallCaps	This alters the text to be rendered in small-caps type.
QFont.Capitalize	This alters the text to be rendered with the first character of each word as an uppercase character.

PySide2.QtGui.QFont. SpacingType ¶

常量	描述
QFont.PercentageSpacing	A value of 100 will keep the spacing unchanged; a value of 200 will enlarge the spacing after a character by the width of the character itself.
QFont.AbsoluteSpacing	A positive value increases the letter spacing by the corresponding pixels; a negative value decreases the spacing.

PySide2.QtGui.QFont. bold ( ) ¶

返回类型

bool

返回 true if weight() is a value greater than Medium ；否则返回 false .

另请参阅

weight() setBold() bold()

static PySide2.QtGui.QFont. cacheStatistics ( ) ¶

Internal function that dumps font cache statistics.

PySide2.QtGui.QFont. capitalization ( ) ¶

返回类型

Capitalization

Returns the current capitalization type of the font.

另请参阅

setCapitalization()

static PySide2.QtGui.QFont. cleanup ( ) ¶

PySide2.QtGui.QFont. defaultFamily ( ) ¶

返回类型

unicode

Returns the family name that corresponds to the current style hint.

另请参阅

StyleHint styleHint() setStyleHint()

PySide2.QtGui.QFont. exactMatch ( ) ¶

返回类型

bool

返回 true if a window system font exactly matching the settings of this font is available.

另请参阅

QFontInfo

PySide2.QtGui.QFont. families ( ) ¶

返回类型

字符串列表

Returns the requested font family names, i.e. the names set in the last setFamilies() call or via the constructor. Otherwise it returns an empty list.

另请参阅

setFamily() setFamilies() family() substitutes() substitute()

PySide2.QtGui.QFont. family ( ) ¶

返回类型

unicode

Returns the requested font family name, i.e. the name set in the constructor or the last setFont() call.

另请参阅

setFamily() substitutes() substitute()

PySide2.QtGui.QFont. fixedPitch ( ) ¶

返回类型

bool

返回 true if fixed pitch has been set; otherwise returns false .

另请参阅

setFixedPitch() fixedPitch()

PySide2.QtGui.QFont. fromString ( arg__1 ) ¶

参数

arg__1 – unicode

返回类型

bool

Sets this font to match the description descrip . The description is a comma-separated list of the font attributes, as returned by toString() .

另请参阅

toString()

PySide2.QtGui.QFont. hintingPreference ( ) ¶

返回类型

HintingPreference

Returns the currently preferred hinting level for glyphs rendered with this font.

另请参阅

setHintingPreference()

static PySide2.QtGui.QFont. initialize ( ) ¶

static PySide2.QtGui.QFont. insertSubstitution ( arg__1 , arg__2 ) ¶

参数

• arg__1 – unicode

• arg__2 – unicode

插入 substituteName into the substitution table for the family familyName .

After substituting a font, trigger the updating of the font by destroying and re-creating all QFont 对象。

另请参阅

insertSubstitutions() removeSubstitutions() substitutions() substitute() substitutes()

static PySide2.QtGui.QFont. insertSubstitutions ( arg__1 , arg__2 ) ¶

参数

• arg__1 – unicode

• arg__2 – 字符串列表

Inserts the list of families substituteNames into the substitution list for familyName .

After substituting a font, trigger the updating of the font by destroying and re-creating all QFont 对象。

另请参阅

insertSubstitution() removeSubstitutions() substitutions() substitute()

PySide2.QtGui.QFont. isCopyOf ( arg__1 ) ¶

参数

arg__1 – QFont

返回类型

bool

返回 true if this font and f are copies of each other, i.e. one of them was created as a copy of the other and neither has been modified since. This is much stricter than equality.

另请参阅

operator=() operator==()

PySide2.QtGui.QFont. italic ( ) ¶

返回类型

bool

返回 true 若 style() of the font is not StyleNormal

另请参阅

setItalic() style()

PySide2.QtGui.QFont. kerning ( ) ¶

返回类型

bool

返回 true if kerning should be used when drawing text with this font.

另请参阅

setKerning()

PySide2.QtGui.QFont. key ( ) ¶

返回类型

unicode

Returns the font’s key, a textual representation of a font. It is typically used as the key for a cache or dictionary of fonts.

另请参阅

QMap

PySide2.QtGui.QFont. lastResortFamily ( ) ¶

返回类型

unicode

注意

此函数被弃用。

This function is deprecated and is not in use by the font selection algorithm in Qt 5. It always returns “helvetica”.

另请参阅

lastResortFont()

PySide2.QtGui.QFont. lastResortFont ( ) ¶

返回类型

unicode

注意

此函数被弃用。

Deprecated function. Since Qt 5.0, this is not used by the font selection algorithm. For compatibility it remains in the API, but will always return the same value as lastResortFamily() .

PySide2.QtGui.QFont. letterSpacing ( ) ¶

返回类型

qreal

Returns the letter spacing for the font.

另请参阅

setLetterSpacing() letterSpacingType() setWordSpacing()

PySide2.QtGui.QFont. letterSpacingType ( ) ¶

返回类型

SpacingType

Returns the spacing type used for letter spacing.

另请参阅

letterSpacing() setLetterSpacing() setWordSpacing()

PySide2.QtGui.QFont. __ne__ ( arg__1 ) ¶

参数

arg__1 – QFont

返回类型

bool

返回 true if this font is different from f ；否则返回 false .

Two QFonts are considered to be different if their font attributes are different.

另请参阅

operator==()

PySide2.QtGui.QFont. __lt__ ( arg__1 ) ¶

参数

arg__1 – QFont

返回类型

bool

PySide2.QtGui.QFont. __eq__ ( arg__1 ) ¶

参数

arg__1 – QFont

返回类型

bool

返回 true if this font is equal to f ；否则返回 false。

Two QFonts are considered equal if their font attributes are equal.

另请参阅

operator!=() isCopyOf()

PySide2.QtGui.QFont. overline ( ) ¶

返回类型

bool

返回 true if overline has been set; otherwise returns false .

另请参阅

setOverline()

PySide2.QtGui.QFont. pixelSize ( ) ¶

返回类型

int

Returns the pixel size of the font if it was set with setPixelSize() . Returns -1 if the size was set with setPointSize() or setPointSizeF() .

另请参阅

setPixelSize() pointSize() pointSize() pixelSize()

PySide2.QtGui.QFont. pointSize ( ) ¶

返回类型

int

Returns the point size of the font. Returns -1 if the font size was specified in pixels.

另请参阅

setPointSize() pointSizeF()

PySide2.QtGui.QFont. pointSizeF ( ) ¶

返回类型

qreal

Returns the point size of the font. Returns -1 if the font size was specified in pixels.

另请参阅

pointSize() setPointSizeF() pixelSize() pointSize() pixelSize()

PySide2.QtGui.QFont. rawMode ( ) ¶

返回类型

bool

返回 true if raw mode is used for font name matching; otherwise returns false .

另请参阅

setRawMode()

PySide2.QtGui.QFont. rawName ( ) ¶

返回类型

unicode

注意

此函数被弃用。

Returns the name of the font within the underlying window system.

On X11, this function will return an empty string.

Using the return value of this function is usually not portable .

另请参阅

setRawName()

static PySide2.QtGui.QFont. removeSubstitutions ( arg__1 ) ¶

参数

arg__1 – unicode

Removes all the substitutions for familyName .

另请参阅

insertSubstitutions() insertSubstitution() substitutions() substitute()

PySide2.QtGui.QFont. resolve ( ) ¶

返回类型

uint

PySide2.QtGui.QFont. resolve ( mask ) ¶

参数

mask – uint

PySide2.QtGui.QFont. resolve ( arg__1 ) ¶

参数

arg__1 – QFont

返回类型

QFont

返回新 QFont that has attributes copied from other that have not been previously set on this font.

PySide2.QtGui.QFont. setBold ( arg__1 ) ¶

参数

arg__1 – bool

若 enable is true sets the font’s weight to Bold ; otherwise sets the weight to Normal .

For finer boldness control use setWeight() .

注意

若 styleName() is set, this value may be ignored, or if supported on the platform, the font artificially embolded.

另请参阅

bold() setWeight()

PySide2.QtGui.QFont. setCapitalization ( arg__1 ) ¶

参数

arg__1 – Capitalization

Sets the capitalization of the text in this font to caps .

A font’s capitalization makes the text appear in the selected capitalization mode.

另请参阅

capitalization()

PySide2.QtGui.QFont. setFamilies ( arg__1 ) ¶

参数

arg__1 – 字符串列表

Sets the list of family names for the font. The names are case insensitive and may include a foundry name. The first family in families will be set as the main family for the font.

Each family name entry in families may optionally also include a foundry name, e.g. “Helvetica [Cronyx]”. If the family is available from more than one foundry and the foundry isn’t specified, an arbitrary foundry is chosen. If the family isn’t available a family will be set using the font matching algorithm.

另请参阅

family() families() setFamily() setStyleHint() QFontInfo

PySide2.QtGui.QFont. setFamily ( arg__1 ) ¶

参数

arg__1 – unicode

Sets the family name of the font. The name is case insensitive and may include a foundry name.

family name may optionally also include a foundry name, e.g. “Helvetica [Cronyx]”. If the family is available from more than one foundry and the foundry isn’t specified, an arbitrary foundry is chosen. If the family isn’t available a family will be set using the font matching algorithm.

另请参阅

family() setStyleHint() QFontInfo

PySide2.QtGui.QFont. setFixedPitch ( arg__1 ) ¶

参数

arg__1 – bool

若 enable is true, sets fixed pitch on; otherwise sets fixed pitch off.

另请参阅

fixedPitch() QFontInfo

PySide2.QtGui.QFont. setHintingPreference ( hintingPreference ) ¶

参数

hintingPreference – HintingPreference

Set the preference for the hinting level of the glyphs to hintingPreference . This is a hint to the underlying font rendering system to use a certain level of hinting, and has varying support across platforms. See the table in the documentation for HintingPreference 了解更多细节。

The default hinting preference is PreferDefaultHinting .

另请参阅

hintingPreference()

PySide2.QtGui.QFont. setItalic ( b ) ¶

参数

b – bool

设置 style() of the font to StyleItalic if enable is true; otherwise the style is set to StyleNormal .

注意

若 styleName() is set, this value may be ignored, or if supported on the platform, the font may be rendered tilted instead of picking a designed italic font-variant.

另请参阅

italic() QFontInfo

PySide2.QtGui.QFont. setKerning ( arg__1 ) ¶

参数

arg__1 – bool

Enables kerning for this font if enable is true; otherwise disables it. By default, kerning is enabled.

When kerning is enabled, glyph metrics do not add up anymore, even for Latin text. In other words, the assumption that width(‘a’) + width(‘b’) is equal to width(“ab”) is not necessarily true.

另请参阅

kerning() QFontMetrics

PySide2.QtGui.QFont. setLetterSpacing ( type , spacing ) ¶

参数

• type – SpacingType

• spacing – qreal

Sets the letter spacing for the font to spacing and the type of spacing to type .

Letter spacing changes the default spacing between individual letters in the font. The spacing between the letters can be made smaller as well as larger either in percentage of the character width or in pixels, depending on the selected spacing type.

另请参阅

letterSpacing() letterSpacingType() setWordSpacing()

PySide2.QtGui.QFont. setOverline ( arg__1 ) ¶

参数

arg__1 – bool

若 enable is true, sets overline on; otherwise sets overline off.

另请参阅

overline() QFontInfo

PySide2.QtGui.QFont. setPixelSize ( arg__1 ) ¶

参数

arg__1 – int

Sets the font size to pixelSize 像素。

Using this function makes the font device dependent. Use setPointSize() or setPointSizeF() to set the size of the font in a device independent manner.

另请参阅

pixelSize()

PySide2.QtGui.QFont. setPointSize ( arg__1 ) ¶

参数

arg__1 – int

Sets the point size to pointSize . The point size must be greater than zero.

另请参阅

pointSize() setPointSizeF()

PySide2.QtGui.QFont. setPointSizeF ( arg__1 ) ¶

参数

arg__1 – qreal

Sets the point size to pointSize . The point size must be greater than zero. The requested precision may not be achieved on all platforms.

另请参阅

pointSizeF() setPointSize() setPixelSize()

PySide2.QtGui.QFont. setRawMode ( arg__1 ) ¶

参数

arg__1 – bool

若 enable is true, turns raw mode on; otherwise turns raw mode off. This function only has an effect under X11.

If raw mode is enabled, Qt will search for an X font with a complete font name matching the family name, ignoring all other values set for the QFont . If the font name matches several fonts, Qt will use the first font returned by X. QFontInfo cannot be used to fetch information about a QFont using raw mode (it will return the values set in the QFont for all parameters, including the family name).

警告

Enabling raw mode has no effect since Qt 5.0.

另请参阅

rawMode()

PySide2.QtGui.QFont. setRawName ( arg__1 ) ¶

参数

arg__1 – unicode

注意

此函数被弃用。

Sets a font by its system specific name.

A font set with is still a full-featured QFont . It can be queried (for example with italic() ) or modified (for example with setItalic() ) and is therefore also suitable for rendering rich text.

If Qt’s internal font database cannot resolve the raw name, the font becomes a raw font with name as its family.

另请参阅

rawName() setFamily()

PySide2.QtGui.QFont. setStretch ( arg__1 ) ¶

参数

arg__1 – int

Sets the stretch factor for the font.

The stretch factor matches a condensed or expanded version of the font or applies a stretch transform that changes the width of all characters in the font by factor percent. For example, setting factor to 150 results in all characters in the font being 1.5 times (ie. 150%) wider. The minimum stretch factor is 1, and the maximum stretch factor is 4000. The default stretch factor is AnyStretch , which will accept any stretch factor and not apply any transform on the font.

The stretch factor is only applied to outline fonts. The stretch factor is ignored for bitmap fonts.

注意

When matching a font with a native non-default stretch factor, requesting a stretch of 100 will stretch it back to a medium width font.

另请参阅

stretch() Stretch

PySide2.QtGui.QFont. setStrikeOut ( arg__1 ) ¶

参数

arg__1 – bool

若 enable is true, sets strikeout on; otherwise sets strikeout off.

另请参阅

strikeOut() QFontInfo

PySide2.QtGui.QFont. setStyle ( style ) ¶

参数

style – Style

Sets the style of the font to style .

另请参阅

style() italic() QFontInfo

PySide2.QtGui.QFont. setStyleHint ( arg__1 [ , strategy=PreferDefault ] ) ¶

参数

• arg__1 – StyleHint

• strategy – StyleStrategy

Sets the style hint and strategy to hint and strategy ，分别。

If these aren’t set explicitly the style hint will default to AnyStyle and the style strategy to PreferDefault .

Qt does not support style hints on X11 since this information is not provided by the window system.

另请参阅

StyleHint styleHint() StyleStrategy styleStrategy() QFontInfo

PySide2.QtGui.QFont. setStyleName ( arg__1 ) ¶

参数

arg__1 – unicode

Sets the style name of the font to styleName . When set, other style properties like style() and weight() will be ignored for font matching, though they may be simulated afterwards if supported by the platform’s font engine.

Due to the lower quality of artificially simulated styles, and the lack of full cross platform support, it is not recommended to use matching by style name together with matching by style properties

另请参阅

styleName()

PySide2.QtGui.QFont. setStyleStrategy ( s ) ¶

参数

s – StyleStrategy

Sets the style strategy for the font to s .

另请参阅

styleStrategy() StyleStrategy

PySide2.QtGui.QFont. setUnderline ( arg__1 ) ¶

参数

arg__1 – bool

若 enable is true, sets underline on; otherwise sets underline off.

另请参阅

underline() QFontInfo

PySide2.QtGui.QFont. setWeight ( arg__1 ) ¶

参数

arg__1 – int

Sets the weight of the font to weight , using the scale defined by Weight enumeration.

注意

若 styleName() is set, this value may be ignored for font selection.

另请参阅

weight() QFontInfo

PySide2.QtGui.QFont. setWordSpacing ( spacing ) ¶

参数

spacing – qreal

Sets the word spacing for the font to spacing .

Word spacing changes the default spacing between individual words. A positive value increases the word spacing by a corresponding amount of pixels, while a negative value decreases the inter-word spacing accordingly.

Word spacing will not apply to writing systems, where indiviaul words are not separated by white space.

另请参阅

wordSpacing() setLetterSpacing()

PySide2.QtGui.QFont. stretch ( ) ¶

返回类型

int

Returns the stretch factor for the font.

另请参阅

setStretch()

PySide2.QtGui.QFont. strikeOut ( ) ¶

返回类型

bool

返回 true if strikeout has been set; otherwise returns false .

另请参阅

setStrikeOut()

PySide2.QtGui.QFont. style ( ) ¶

返回类型

Style

Returns the style of the font.

另请参阅

setStyle()

PySide2.QtGui.QFont. styleHint ( ) ¶

返回类型

StyleHint

返回 StyleHint .

The style hint affects the font matching algorithm 。见 StyleHint for the list of available hints.

另请参阅

setStyleHint() StyleStrategy styleHint()

PySide2.QtGui.QFont. styleName ( ) ¶

返回类型

unicode

Returns the requested font style name. This can be used to match the font with irregular styles (that can’t be normalized in other style properties).

另请参阅

setStyleName() setFamily() setStyle()

PySide2.QtGui.QFont. styleStrategy ( ) ¶

返回类型

StyleStrategy

返回 StyleStrategy .

The style strategy affects the font matching algorithm. See StyleStrategy for the list of available strategies.

另请参阅

setStyleStrategy() setStyleHint() StyleHint

static PySide2.QtGui.QFont. substitute ( arg__1 ) ¶

参数

arg__1 – unicode

返回类型

unicode

Returns the first family name to be used whenever familyName is specified. The lookup is case insensitive.

If there is no substitution for familyName , familyName 被返回。

To obtain a list of substitutions use substitutes() .

另请参阅

setFamily() insertSubstitutions() insertSubstitution() removeSubstitutions()

static PySide2.QtGui.QFont. substitutes ( arg__1 ) ¶

参数

arg__1 – unicode

返回类型

字符串列表

Returns a list of family names to be used whenever familyName is specified. The lookup is case insensitive.

If there is no substitution for familyName , an empty list is returned.

另请参阅

substitute() insertSubstitutions() insertSubstitution() removeSubstitutions()

static PySide2.QtGui.QFont. substitutions ( ) ¶

返回类型

字符串列表

Returns a sorted list of substituted family names.

另请参阅

insertSubstitution() removeSubstitution() substitute()

PySide2.QtGui.QFont. swap ( other ) ¶

参数

other – QFont

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

PySide2.QtGui.QFont. toString ( ) ¶

返回类型

unicode

Returns a description of the font. The description is a comma-separated list of the attributes, perfectly suited for use in QSettings .

另请参阅

fromString()

PySide2.QtGui.QFont. underline ( ) ¶

返回类型

bool

返回 true if underline has been set; otherwise returns false .

另请参阅

setUnderline()

PySide2.QtGui.QFont. weight ( ) ¶

返回类型

int

Returns the weight of the font, using the same scale as the Weight enumeration.

另请参阅

setWeight() Weight QFontInfo

PySide2.QtGui.QFont. wordSpacing ( ) ¶

返回类型

qreal

Returns the word spacing for the font.

另请参阅

setWordSpacing() setLetterSpacing()