| 头： | #include <QFont> |
注意： 此类的所有函数 可重入 .
| enum | Capitalization { MixedCase, AllUppercase, AllLowercase, SmallCaps, Capitalize } |
| enum | HintingPreference { PreferDefaultHinting, PreferNoHinting, PreferVerticalHinting, PreferFullHinting } |
| enum | SpacingType { PercentageSpacing, AbsoluteSpacing } |
| enum | Stretch { UltraCondensed, ExtraCondensed, Condensed, SemiCondensed, ..., UltraExpanded } |
| enum | Style { StyleNormal, StyleItalic, StyleOblique } |
| enum | StyleHint { AnyStyle, SansSerif, Helvetica, Serif, ..., System } |
| enum | StyleStrategy { PreferDefault, PreferBitmap, PreferDevice, PreferOutline, ..., ForceIntegerMetrics } |
| enum | Weight { Light, Normal, DemiBold, Bold, Black } |
| QFont () | |
| QFont (const QString & family , int pointSize = -1, int weight = -1, bool italic = false) | |
| QFont (const QFont & font , QPaintDevice * pd ) | |
| QFont (const QFont & font ) | |
| ~QFont () | |
| bool | bold () const |
| Capitalization | capitalization () const |
| QString | defaultFamily () const |
| bool | exactMatch () const |
| QString | family () const |
| bool | fixedPitch () const |
| FT_Face | freetypeFace () const |
| bool | fromString (const QString & descrip ) |
| HFONT | handle () const |
| HintingPreference | hintingPreference () const |
| bool | isCopyOf (const QFont & f ) const |
| bool | italic () const |
| bool | kerning () const |
| QString | key () const |
| QString | lastResortFamily () const |
| QString | lastResortFont () const |
| qreal | letterSpacing () const |
| SpacingType | letterSpacingType () const |
| quint32 | macFontID () const |
| bool | overline () const |
| int | pixelSize () const |
| int | pointSize () const |
| qreal | pointSizeF () const |
| bool | rawMode () const |
| QString | rawName () const |
| QFont | resolve (const QFont & other ) const |
| void | setBold (bool enable ) |
| void | setCapitalization (Capitalization caps ) |
| void | setFamily (const QString & family ) |
| void | setFixedPitch (bool enable ) |
| void | setHintingPreference (HintingPreference hintingPreference ) |
| void | setItalic (bool enable ) |
| void | setKerning (bool enable ) |
| void | setLetterSpacing (SpacingType type , qreal spacing ) |
| void | setOverline (bool enable ) |
| void | setPixelSize (int pixelSize ) |
| void | setPointSize (int pointSize ) |
| void | setPointSizeF (qreal pointSize ) |
| void | setRawMode (bool enable ) |
| void | setRawName (const QString & name ) |
| void | setStretch (int factor ) |
| void | setStrikeOut (bool enable ) |
| void | setStyle (Style style ) |
| void | setStyleHint (StyleHint hint , StyleStrategy strategy = PreferDefault) |
| void | setStyleName (const QString & styleName ) |
| void | setStyleStrategy (StyleStrategy s ) |
| void | setUnderline (bool enable ) |
| void | setWeight (int weight ) |
| void | setWordSpacing (qreal spacing ) |
| int | stretch () const |
| bool | strikeOut () const |
| Style | style () const |
| StyleHint | styleHint () const |
| QString | styleName () const |
| StyleStrategy | styleStrategy () const |
| QString | toString () const |
| bool | underline () const |
| int | weight () const |
| qreal | wordSpacing () const |
| operator QVariant () const | |
| bool | operator!= (const QFont & f ) const |
| bool | operator< (const QFont & f ) const |
| QFont & | operator= (const QFont & font ) |
| QFont & | operator= (QFont && other ) |
| bool | operator== (const QFont & f ) const |
| void | insertSubstitution (const QString & familyName , const QString & substituteName ) |
| void | insertSubstitutions (const QString & familyName , const QStringList & substituteNames ) |
| void | removeSubstitution (const QString & familyName ) |
| QString | substitute (const QString & familyName ) |
| QStringList | substitutes (const QString & familyName ) |
| QStringList | substitutions () |
| QDataStream & | operator<< (QDataStream & s , const QFont & font ) |
| QDataStream & | operator>> (QDataStream & s , QFont & font ) |
The QFont 类指定用于绘制文本的字体。
当创建 QFont 对象时，可指定想要字体拥有的各种属性。Qt 将使用带有指定属性的字体，或者若不存在匹配字体，Qt 将使用最接近匹配的安装字体。实际使用的字体属性检索自 QFontInfo 对象。若窗口系统提供的准确匹配 exactMatch () returns true. Use QFontMetrics 能获取度量值，如：字符串的像素长度是使用 QFontMetrics::width ().
注意， QApplication 实例必须存在先于 QFont 可以使用。可以设置应用程序的默认字体采用 QApplication::setFont ().
若所选字体不包括需要显示的所有字符， QFont 将试着查找最接近等效字体的字符。当 QPainter 绘制字符来自字体 QFont 将报告它是否拥有该字符；若没有， QPainter 将绘制未填充正方形。
创建 QFont 像这样：
QFont serifFont("Times", 10, QFont::Bold); QFont sansFont("Helvetica [Cronyx]", 12);
在构造函数中设置的属性也可以稍后设置，如 setFamily (), setPointSize (), setPointSizeFloat (), setWeight () 和 setItalic ()。剩余属性必须在构造后设置，如 setBold (), setUnderline (), setOverline (), setStrikeOut () 和 setFixedPitch (). QFontInfo 对象应该被创建 after 字体属性已设置。 QFontInfo 对象不改变，即使更改字体的属性。相应 get 函数，如 family (), pointSize () 等，返回设置值，即使使用的值可能不同。实际值可以获取自 QFontInfo 对象。
若请求字体系列不可用，可以影响 字体匹配算法 通过选取特定 QFont::StyleHint and QFont::StyleStrategy with setStyleHint ()。默认系列 (对应当前样式提示) 的返回是通过 defaultFamily ().
字体匹配算法有 lastResortFamily () 和 lastResortFont () 在无法找到合适匹配的情况下。可以提供代入字体系列名使用 insertSubstitution () 和 insertSubstitutions ()。可以移除代入采用 removeSubstitution ()。使用 substitute () 检索系列的第一代入，或检索系列名称自身若没有代入。使用 substitutes () 检索系列的代入列表 (可能为空)。
Every QFont 拥有 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.
In X11 you can set a font using its system specific name with setRawName ().
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.
字体匹配算法工作如下：
Note that the actual font matching algorithm varies from platform to platform.
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 样式对策 (见 setStyleStrategy ()).
一旦找到字体，剩余属性将按优先级次序匹配：
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：
QFont f("Helvetica");
若拥有 Adobe 和 Cronyx Helvetica 两者，可以获取任一。
QFont f("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 对象，如
QFontInfo info(f1); QString family = info.family();
要找出字体规格，使用 QFontMetrics 对象，如
QFontMetrics fm(f1); int textWidthInPixels = fm.width("How many pixels wide is this text?"); int textHeightInPixels = fm.height();
对于字体的更多一般信息，见 comp.fonts FAQ. Information on encodings can be found from Roman Czyborra's 页面。
另请参阅 QFontComboBox , QFontMetrics , QFontInfo , QFontDatabase ，和 字符映射范例 .
此字体应用于文本的渲染选项。
| 常量 | 值 | 描述 |
|---|---|---|
QFont::MixedCase
|
0
|
This is the normal text rendering option where no capitalization change is applied. |
QFont::AllUppercase
|
1
|
这以全大写类型方式更改要渲染文本。 |
QFont::AllLowercase
|
2
|
这以全小写类型方式更改要渲染文本。 |
QFont::SmallCaps
|
3
|
This alters the text to be rendered in small-caps type. |
QFont::Capitalize
|
4
|
This alters the text to be rendered with the first character of each word as an uppercase character. |
该枚举在 Qt 4.4 引入或被修改。
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 | 值 | 描述 |
|---|---|---|
QFont::PreferDefaultHinting
|
0
|
Use the default hinting level for the target platform. |
QFont::PreferNoHinting
|
1
|
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
|
2
|
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
|
3
|
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.
| PreferDefaultHinting | PreferNoHinting | PreferVerticalHinting | PreferFullHinting | |
|---|---|---|---|---|
| Windows Vista (w/o 平台更新) 及更早版本 | 完整提示 | 完整提示 | 完整提示 | 完整提示 |
| Windows 7 和 Windows Vista (w/平台更新) 及 Qt 启用的 DirectWrite | 完整提示 | 垂直提示 | 垂直提示 | 完整提示 |
| FreeType | 操作系统设置 | 不提示 | Vertical hinting (light) | 完整提示 |
| Cocoa on Mac OS X | 不提示 | 不提示 | 不提示 | 不提示 |
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.
该枚举在 Qt 4.8 引入或被修改。
| 常量 | 值 | 描述 |
|---|---|---|
QFont::PercentageSpacing
|
0
|
值 100 将保持间距不变；值 200 将字符后间距扩大到字符本身宽度。 |
QFont::AbsoluteSpacing
|
1
|
正值递增相应像素的字母间距；负值递减间距。 |
该枚举在 Qt 4.4 引入或被修改。
遵循 CSS 命名约定的预定义拉伸值。值越高，文本拉伸更多。
| 常量 | 值 | 描述 |
|---|---|---|
QFont::UltraCondensed
|
50
|
50 |
QFont::ExtraCondensed
|
62
|
62 |
QFont::Condensed
|
75
|
75 |
QFont::SemiCondensed
|
87
|
87 |
QFont::Unstretched
|
100
|
100 |
QFont::SemiExpanded
|
112
|
112 |
QFont::Expanded
|
125
|
125 |
QFont::ExtraExpanded
|
150
|
150 |
QFont::UltraExpanded
|
200
|
200 |
另请参阅 setStretch () 和 stretch ().
此枚举描述用于显示文本的不同字形样式。
| 常量 | 值 | 描述 |
|---|---|---|
QFont::StyleNormal
|
0
|
用于无样式文本的 Normal (正常) 字形。 |
QFont::StyleItalic
|
1
|
为斜体文本表示目的，专门设计的 Italic (斜体) 字形。 |
QFont::StyleOblique
|
2
|
具有斜体外观的字形通常是基于无样式的字形，但未对斜体文本表示目的进行微调。 |
另请参阅 Weight .
样式提示用于 字体匹配 算法以查找适当默认系列，若选中的字体系列不可用。
| 常量 | 值 | 描述 |
|---|---|---|
QFont::AnyStyle
|
? | 让字体匹配算法选择系列。这为默认。 |
QFont::SansSerif
|
Helvetica
|
字体匹配器首选 SansSerif 字体。 |
QFont::Helvetica
|
0
|
同义词
SansSerif
.
|
QFont::Serif
|
Times
|
字体匹配器首选 serif 字体。 |
QFont::Times
|
? |
同义词
Serif
.
|
QFont::TypeWriter
|
Courier
|
字体匹配器首选固定间距字体。 |
QFont::Courier
|
? |
同义词
TypeWriter
.
|
QFont::OldEnglish
|
? | 字体匹配器首选装饰字体。 |
QFont::Decorative
|
OldEnglish
|
同义词
OldEnglish
.
|
QFont::Monospace
|
? | 字体匹配器首选映射到 CSS 一般字体系列 Monospace (等宽) 的字体。 |
QFont::Fantasy
|
? | 字体匹配器首选映射到 CSS 一般字体系列 Fantasy (幻想) 的字体。 |
QFont::Cursive
|
? | 字体匹配器首选映射到 CSS 一般字体系列 Cursive (草书) 的字体。 |
QFont::System
|
? | 字体匹配器首选系统字体。 |
样式对策告诉 字体匹配 算法应使用什么类型字体以查找合适默认系列。
下列对策可用：
| 常量 | 值 | 描述 |
|---|---|---|
QFont::PreferDefault
|
0x0001
|
默认样式战略。它不首选任何类型的字体。 |
QFont::PreferBitmap
|
0x0002
|
首选位图字体 (而不是轮廓字体)。 |
QFont::PreferDevice
|
0x0004
|
首选设备字体。 |
QFont::PreferOutline
|
0x0008
|
首选轮廓字体 (而不是位图字体)。 |
QFont::ForceOutline
|
0x0010
|
强制使用轮廓字体。 |
QFont::NoAntialias
|
0x0100
|
不对字体抗锯齿。 |
QFont::PreferAntialias
|
0x0080
|
抗锯齿，若可能的话。 |
QFont::OpenGLCompatible
|
0x0200
|
forces the use of OpenGL compatible fonts. |
QFont::NoFontMerging
|
0x8000
|
若为某种书写系统选择的字体不包含请求绘制的字符，那么 Qt 会自动选取包含该字符的外观类似字体。NoFontMerging 标志会禁用此特征。请注意，启用此标志不会阻止 Qt 自动拾取合适字体，当所选字体不支持文本书写系统时。 |
这些中的任何标志可以与以下标志之一 OR 组合：
| 常量 | 值 | 描述 |
|---|---|---|
QFont::PreferMatch
|
0x0020
|
首选准确匹配。字体匹配器将试着使用已指定的准确字体大小。 |
QFont::PreferQuality
|
0x0040
|
首选最佳品质字体。字体匹配器将使用字体支持的最接近标准点大小。 |
QFont::ForceIntegerMetrics
|
0x0400
|
强制在支持 Fractional (分数) 字体规格的字体引擎中，使用整数值。 |
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 is ultralight, whilst 99 will be an extremely black.
此枚举包含预定义的字体粗细：
| 常量 | 值 | 描述 |
|---|---|---|
QFont::Light
|
25
|
25 |
QFont::Normal
|
50
|
50 |
QFont::DemiBold
|
63
|
63 |
QFont::Bold
|
75
|
75 |
QFont::Black
|
87
|
87 |
使用应用程序默认字体，构造字体对象。
另请参阅 QApplication::setFont () 和 QApplication::font ().
构造字体对象采用指定 family , pointSize , weight and italic 设置。
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, except on Symbian where it is 7 points.
The family 名称还可以可选包括代工厂名称，如 Helvetica[Cronyx]。若 family 可以从多个代工厂获得但未指定代工厂，可以选择任意代工厂。若系列不可用，将设置系列使用 字体匹配 算法。
另请参阅 Weight , setFamily (), setPointSize (), setWeight (), setItalic (), setStyleHint ()，和 QApplication::font ().
构造字体从 font 为用于描绘设备 pd .
构造副本字体为 font .
销毁字体对象并释放所有分配资源。
返回 true 若 weight () 值大于 QFont::Normal ；否则返回 false。
另请参阅 weight (), setBold ()，和 QFontInfo::bold ().
返回字体的当前大写类型。
该函数在 Qt 4.4 引入。
另请参阅 setCapitalization ().
返回当前样式提示对应的系列名称。
另请参阅 StyleHint , styleHint ()，和 setStyleHint ().
Returns true if a window system font exactly matching the settings of this font is available.
另请参阅 QFontInfo .
返回请求的字体系列名，即：在构造函数中设置或最后一次调用 setFont() 的名称。
另请参阅 setFamily (), substitutes ()，和 substitute ().
Returns true if fixed pitch has been set; otherwise returns false.
另请参阅 setFixedPitch () 和 QFontInfo::fixedPitch ().
Returns the handle to the primary FreeType face of the font. If font merging is not disabled a QFont can contain several physical fonts.
Returns 0 if the font does not contain a FreeType face.
注意： This function is only available on platforms that provide the FreeType library; i.e., X11 and some Embedded Linux platforms.
设置此字体以匹配描述 descrip . The description is a comma-separated list of the font attributes, as returned by toString ().
另请参阅 toString ().
Returns the window system handle to the font, for low-level access. Using this function is not portable.
返回目前采用此字体，渲染字形的首选提示级别。
该函数在 Qt 4.8 引入。
另请参阅 setHintingPreference ().
[static]
void
QFont::
insertSubstitution
(const
QString
&
familyName
, const
QString
&
substituteName
)
插入 substituteName 进代入表为系列 familyName .
另请参阅 insertSubstitutions (), removeSubstitution (), substitutions (), substitute ()，和 substitutes ().
[static]
void
QFont::
insertSubstitutions
(const
QString
&
familyName
, const
QStringList
&
substituteNames
)
Inserts the list of families substituteNames into the substitution list for familyName .
另请参阅 insertSubstitution (), removeSubstitution (), substitutions ()，和 substitute ().
Returns 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= () 和 operator== ().
返回 true 若 style () of the font is not QFont::StyleNormal
Returns true if kerning should be used when drawing text with this font.
另请参阅 setKerning ().
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 .
返回 LastResort (最后手段) 字体系列名称。
The current implementation tries a wide variety of common fonts, returning the first one it finds. Is is possible that no family is found in which case an empty string is returned.
另请参阅 lastResortFont ().
Returns a "last resort" font name for the font matching algorithm. This is used if the last resort family is not available. It will always return a name, if necessary returning something like "fixed" or "system".
The current implementation tries a wide variety of common fonts, returning the first one it finds. The implementation may change at any time, but this function will always return a string containing something.
It is theoretically possible that there really isn't a lastResortFont() in which case Qt will abort with an error message. We have not been able to identify a case where this happens. Please report it as a bug if it does, preferably with a list of the fonts you have installed.
另请参阅 lastResortFamily () 和 rawName ().
返回字体的字母间距。
该函数在 Qt 4.4 引入。
另请参阅 setLetterSpacing (), letterSpacingType ()，和 setWordSpacing ().
返回用于字母间距的间距类型。
该函数在 Qt 4.4 引入。
另请参阅 letterSpacing (), setLetterSpacing ()，和 setWordSpacing ().
Returns an ATSUFontID
Returns true if overline has been set; otherwise returns false.
另请参阅 setOverline ().
返回字体的像素大小，若它有设置采用 setPixelSize ()。返回 -1 若大小的设置是采用 setPointSize () 或 setPointSizeF ().
另请参阅 setPixelSize (), pointSize (), QFontInfo::pointSize ()，和 QFontInfo::pixelSize ().
返回字体的点大小。返回 -1 若以像素为单位指定字体大小。
另请参阅 setPointSize () 和 pointSizeF ().
返回字体的点大小。返回 -1 若以像素为单位指定字体大小。
另请参阅 pointSize (), setPointSizeF (), pixelSize (), QFontInfo::pointSize ()，和 QFontInfo::pixelSize ().
Returns true if raw mode is used for font name matching; otherwise returns false.
另请参阅 setRawMode () 和 rawName ().
Returns the name of the font within the underlying window system.
On X11, this function will return an empty string if Qt is built with FontConfig support; otherwise the XLFD (X Logical Font Description) is returned.
Using the return value of this function is usually not portable .
另请参阅 setRawName ().
[static]
void
QFont::
removeSubstitution
(const
QString
&
familyName
)
移除所有代入为 familyName .
另请参阅 insertSubstitutions (), insertSubstitution (), substitutions ()，和 substitute ().
返回新的 QFont that has attributes copied from other that have not been previously set on this font.
若 enable 为 true，将字体的权重设为 QFont::Bold ；否则将精细设为 QFont::Normal .
对于更精细粗体控制，使用 setWeight ().
将此字体中文本的首字母大小写设为 caps .
字体大写使文本以选中大写模式出现。
该函数在 Qt 4.4 引入。
另请参阅 capitalization ().
设置字体的系列名称。名称不区分大小写且可能包括出厂名称。
The family 名称还可以可选包括代工厂名称，如 Helvetica[Cronyx]。若 family 可以从多个代工厂获得但未指定代工厂，可以选择任意代工厂。若系列不可用，将设置系列使用 字体匹配 算法。
另请参阅 family (), setStyleHint ()，和 QFontInfo .
若 enable 为 true，设置固定间距开；否则设置固定间距关。
另请参阅 fixedPitch () 和 QFontInfo .
将字形提示级别首选设为 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 QFont::HintingPreference 了解更多细节。
默认提示首选 QFont::PreferDefaultHinting .
该函数在 Qt 4.8 引入。
另请参阅 hintingPreference ().
设置 style () 为字体到 QFont::StyleItalic if enable 为 true；否则样式被设为 QFont::StyleNormal .
为此字体启用字距调整，若 enable 为 true；否则禁用它。默认情况下，字距调整是启用的。
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 neccesairly true.
另请参阅 kerning () 和 QFontMetrics .
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.
该函数在 Qt 4.4 引入。
另请参阅 letterSpacing (), letterSpacingType ()，和 setWordSpacing ().
若 enable 为 True，设置上划线打开；否则，设置上划线关闭。
另请参阅 overline () 和 QFontInfo .
将字体大小设为 pixelSize 像素。
使用此函数使字体设备从属。使用 setPointSize () 或 setPointSizeF () 以按设备无关方式设置字体大小。
另请参阅 pixelSize ().
将点大小设为 pointSize 。点大小必须大于 0。
另请参阅 pointSize () 和 setPointSizeF ().
将点大小设为 pointSize 。点大小必须大于 0。请求精度不可能在所有平台中达成。
另请参阅 pointSizeF (), setPointSize ()，和 setPixelSize ().
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： Do not use raw mode unless you really, really need it! In most (if not all) cases, setRawName () is a much better choice.
另请参阅 rawMode () 和 setRawName ().
Sets a font by its system specific name. The function is particularly useful under X, where system font settings (for example X resources) are usually available in XLFD (X Logical Font Description) form only. You can pass an XLFD as name to this function.
A font set with setRawName() 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.
Note that the present implementation does not handle wildcards in XLFDs well, and that font aliases (file
fonts.alias
in the font directory on X11) are not supported.
另请参阅 rawName (), setRawMode ()，和 setFamily ().
设置字体的拉伸因子。
The stretch factor changes the width of all characters in the font by factor 百分比。例如，设置 factor to 150 results in all characters in the font being 1.5 times (ie. 150%) wider. The default stretch factor is 100. The minimum stretch factor is 1, and the maximum stretch factor is 4000.
拉伸因子仅应用于轮廓字体。位图字体会忽略拉伸因子。
NOTE: QFont cannot stretch XLFD fonts. When loading XLFD fonts on X11, the stretch factor is matched against a predefined set of values for the SETWIDTH_NAME field of the XLFD.
另请参阅 stretch () 和 QFont::Stretch .
若 enable 为 true，设置删除线打开；否则，设置删除线关闭。
另请参阅 strikeOut () 和 QFontInfo .
将字体样式设为 style .
另请参阅 style (), italic ()，和 QFontInfo .
将样式提示和对策设为 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 ()，和 QFontInfo .
Sets the style name of the font to the given styleName . When set, other style properties like style () 和 weight () will be ignored for font matching.
该函数在 Qt 4.8 引入。
另请参阅 styleName ().
将字体样式对策设为 s .
另请参阅 styleStrategy () 和 QFont::StyleStrategy .
若 enable 为 true，设置下划线开；否则设置下划线关。
另请参阅 underline () 和 QFontInfo .
Sets the weight the font to weight , which should be a value from the QFont::Weight 枚举。
将字体单词间距设为 spacing .
单词间距改变单个单词之间的默认间距。正值按相应像素数量递增单词间距，而负值相应递减单词间间距。
单词间距不适用于书写系统，其单个单词不按空白分隔。
该函数在 Qt 4.4 引入。
另请参阅 wordSpacing () 和 setLetterSpacing ().
返回字体的拉伸因子。
另请参阅 setStretch ().
Returns true if strikeout has been set; otherwise returns false.
另请参阅 setStrikeOut ().
返回字体的样式。
另请参阅 setStyle ().
返回 StyleHint .
样式提示影响 字体匹配 算法。见 QFont::StyleHint 了解可用提示列表。
另请参阅 setStyleHint (), QFont::StyleStrategy ，和 QFontInfo::styleHint ().
Returns the requested font style name, it will be used to match the font with irregular styles (that can't be normalized in other style properties). It depends on system font support, thus only works for Mac OS X and X11 so far. On Windows irregular styles will be added as separate font families so there is no need for this.
该函数在 Qt 4.8 引入。
另请参阅 setStyleName (), setFamily ()，和 setStyle ().
返回 StyleStrategy .
样式对策影响 字体匹配 算法。见 QFont::StyleStrategy 了解可用战略列表。
另请参阅 setStyleStrategy (), setStyleHint ()，和 QFont::StyleHint .
[static]
QString
QFont::
substitute
(const
QString
&
familyName
)
返回要使用的第一系列名称每当 familyName 有指定。查找不区分大小写。
若没有代入对于 familyName , familyName 被返回。
要获得代入列表使用 substitutes ().
另请参阅 setFamily (), insertSubstitutions (), insertSubstitution ()，和 removeSubstitution ().
[static]
QStringList
QFont::
substitutes
(const
QString
&
familyName
)
返回要使用的系列名称列表每当 familyName 有指定。查找不区分大小写。
若没有代入对于 familyName ，返回空列表。
另请参阅 substitute (), insertSubstitutions (), insertSubstitution ()，和 removeSubstitution ().
[static]
QStringList
QFont::
substitutions
()
返回代入系列名称的排序列表。
另请参阅 insertSubstitution (), removeSubstitution ()，和 substitute ().
返回字体的描述。描述是逗号分隔的属性列表，非常适合用于 QSettings .
另请参阅 fromString ().
Returns true if underline has been set; otherwise returns false.
另请参阅 setUnderline ().
Returns the weight of the font which is one of the enumerated values from QFont::Weight .
另请参阅 setWeight (), Weight ，和 QFontInfo .
返回字体的单词间距。
该函数在 Qt 4.4 引入。
另请参阅 setWordSpacing () 和 setLetterSpacing ().
返回字体作为 QVariant
Returns 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. If rawMode () is enabled for both fonts, only the family fields are compared.
另请参阅 operator== ().
提供任意比较为此字体和字体 f . All that is guaranteed is that the operator returns false if both fonts are equal and that (f1 < f2) == !(f2 < f1) if the fonts are not equal.
此函数在某些情况下很有用，例如，若想要使用 QFont 对象作为键在 QMap .
另请参阅 operator== (), operator!= ()，和 isCopyOf ().
赋值 font 到此字体并返回它的引用。
Returns true if this font is equal to f ；否则返回 false。
Two QFonts are considered equal if their font attributes are equal. If rawMode () is enabled for both fonts, only the family fields are compared.
另请参阅 operator!= () 和 isCopyOf ().
写入字体 font 到数据流 s (toString() 写入到文本流)。
另请参阅 QDataStream 运算符格式 .
读取字体 font 从数据流 s (fromString() 读取自文本流)。
另请参阅 QDataStream 运算符格式 .