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QLocale Class

The QLocale class converts between numbers and their string representations in various languages. More...

Header: #include <QLocale>
qmake: QT += core

Note: All functions in this class are reentrant with the following exceptions:

Public Types

enum Country { AnyCountry, Afghanistan, AlandIslands, Albania, Algeria, …, Zimbabwe }
enum CurrencySymbolFormat { CurrencyIsoCode, CurrencySymbol, CurrencyDisplayName }
enum DataSizeFormat { DataSizeIecFormat, DataSizeTraditionalFormat, DataSizeSIFormat }
flags DataSizeFormats
enum FloatingPointPrecisionOption { FloatingPointShortest }
enum FormatType { LongFormat, ShortFormat, NarrowFormat }
enum Language { AnyLanguage, C, Abkhazian, Afan, Afar, …, Zulu }
enum MeasurementSystem { MetricSystem, ImperialUSSystem, ImperialUKSystem, ImperialSystem }
enum NumberOption { DefaultNumberOptions, OmitGroupSeparator, RejectGroupSeparator, OmitLeadingZeroInExponent, RejectLeadingZeroInExponent, …, RejectTrailingZeroesAfterDot }
flags NumberOptions
enum QuotationStyle { StandardQuotation, AlternateQuotation }
enum Script { AnyScript, AdlamScript, AhomScript, AnatolianHieroglyphsScript, ArabicScript, …, YiScript }

Public Functions

QLocale(const QLocale &other)
QLocale(QLocale::Language language, QLocale::Script script, QLocale::Country country)
QLocale(QLocale::Language language, QLocale::Country country = AnyCountry)
QLocale(const QString &name)
QLocale()
QLocale & operator=(const QLocale &other)
~QLocale()
QString amText() const
QString bcp47Name() const
QLocale collation() const
QLocale::Country country() const
QString createSeparatedList(const QStringList &list) const
QString currencySymbol(QLocale::CurrencySymbolFormat format = CurrencySymbol) const
QString dateFormat(QLocale::FormatType format = LongFormat) const
QString dateTimeFormat(QLocale::FormatType format = LongFormat) const
QString dayName(int day, QLocale::FormatType type = LongFormat) const
QChar decimalPoint() const
QChar exponential() const
Qt::DayOfWeek firstDayOfWeek() const
QString formattedDataSize(qint64 bytes, int precision = 2, QLocale::DataSizeFormats format = DataSizeIecFormat) const
QChar groupSeparator() const
QLocale::Language language() const
QLocale::MeasurementSystem measurementSystem() const
QString monthName(int month, QLocale::FormatType type = LongFormat) const
QString name() const
QString nativeCountryName() const
QString nativeLanguageName() const
QChar negativeSign() const
QLocale::NumberOptions numberOptions() const
QChar percent() const
QString pmText() const
QChar positiveSign() const
QString quoteString(const QString &str, QLocale::QuotationStyle style = StandardQuotation) const
QString quoteString(const QStringRef &str, QLocale::QuotationStyle style = StandardQuotation) const
QLocale::Script script() const
void setNumberOptions(QLocale::NumberOptions options)
QString standaloneDayName(int day, QLocale::FormatType type = LongFormat) const
QString standaloneMonthName(int month, QLocale::FormatType type = LongFormat) const
void swap(QLocale &other)
Qt::LayoutDirection textDirection() const
QString timeFormat(QLocale::FormatType format = LongFormat) const
QString toCurrencyString(qlonglong value, const QString &symbol = QString()) const
QString toCurrencyString(qulonglong value, const QString &symbol = QString()) const
QString toCurrencyString(short value, const QString &symbol = QString()) const
QString toCurrencyString(ushort value, const QString &symbol = QString()) const
QString toCurrencyString(int value, const QString &symbol = QString()) const
QString toCurrencyString(uint value, const QString &symbol = QString()) const
QString toCurrencyString(double value, const QString &symbol = QString()) const
QString toCurrencyString(double value, const QString &symbol, int precision) const
QString toCurrencyString(float value, const QString &symbol = QString()) const
QString toCurrencyString(float i, const QString &symbol, int precision) const
QDate toDate(const QString &string, QLocale::FormatType format = LongFormat) const
QDate toDate(const QString &string, const QString &format) const
QDate toDate(const QString &string, QLocale::FormatType format, QCalendar cal) const
QDate toDate(const QString &string, const QString &format, QCalendar cal) const
QDateTime toDateTime(const QString &string, QLocale::FormatType format = LongFormat) const
QDateTime toDateTime(const QString &string, const QString &format) const
QDateTime toDateTime(const QString &string, QLocale::FormatType format, QCalendar cal) const
QDateTime toDateTime(const QString &string, const QString &format, QCalendar cal) const
double toDouble(const QString &s, bool *ok = nullptr) const
double toDouble(const QStringRef &s, bool *ok = nullptr) const
double toDouble(QStringView s, bool *ok = nullptr) const
float toFloat(const QString &s, bool *ok = nullptr) const
float toFloat(const QStringRef &s, bool *ok = nullptr) const
float toFloat(QStringView s, bool *ok = nullptr) const
int toInt(const QString &s, bool *ok = nullptr) const
int toInt(const QStringRef &s, bool *ok = nullptr) const
int toInt(QStringView s, bool *ok = nullptr) const
long toLong(const QString &s, bool *ok = nullptr) const
long toLong(const QStringRef &s, bool *ok = nullptr) const
long toLong(QStringView s, bool *ok = nullptr) const
qlonglong toLongLong(const QString &s, bool *ok = nullptr) const
qlonglong toLongLong(const QStringRef &s, bool *ok = nullptr) const
qlonglong toLongLong(QStringView s, bool *ok = nullptr) const
QString toLower(const QString &str) const
short toShort(const QString &s, bool *ok = nullptr) const
short toShort(const QStringRef &s, bool *ok = nullptr) const
short toShort(QStringView s, bool *ok = nullptr) const
QString toString(qlonglong i) const
QString toString(qulonglong i) const
QString toString(long i) const
QString toString(ulong i) const
QString toString(short i) const
QString toString(ushort i) const
QString toString(int i) const
QString toString(uint i) const
QString toString(double i, char f = 'g', int prec = 6) const
QString toString(float i, char f = 'g', int prec = 6) const
QString toString(const QDate &date, const QString &format) const
QString toString(const QTime &time, const QString &format) const
QString toString(const QDateTime &dateTime, const QString &format) const
QString toString(const QDate &date, QStringView format) const
QString toString(const QTime &time, QStringView format) const
QString toString(const QDateTime &dateTime, QStringView format) const
QString toString(const QDate &date, QLocale::FormatType format = LongFormat) const
QString toString(const QTime &time, QLocale::FormatType format = LongFormat) const
QString toString(const QDateTime &dateTime, QLocale::FormatType format = LongFormat) const
QTime toTime(const QString &string, QLocale::FormatType format = LongFormat) const
QTime toTime(const QString &string, const QString &format) const
uint toUInt(const QString &s, bool *ok = nullptr) const
uint toUInt(const QStringRef &s, bool *ok = nullptr) const
uint toUInt(QStringView s, bool *ok = nullptr) const
ulong toULong(const QString &s, bool *ok = nullptr) const
ulong toULong(const QStringRef &s, bool *ok = nullptr) const
ulong toULong(QStringView s, bool *ok = nullptr) const
qulonglong toULongLong(const QString &s, bool *ok = nullptr) const
qulonglong toULongLong(const QStringRef &s, bool *ok = nullptr) const
qulonglong toULongLong(QStringView s, bool *ok = nullptr) const
ushort toUShort(const QString &s, bool *ok = nullptr) const
ushort toUShort(const QStringRef &s, bool *ok = nullptr) const
ushort toUShort(QStringView s, bool *ok = nullptr) const
QString toUpper(const QString &str) const
QStringList uiLanguages() const
QList<Qt::DayOfWeek> weekdays() const
QChar zeroDigit() const
bool operator!=(const QLocale &other) const
bool operator==(const QLocale &other) const

Static Public Members

QLocale c()
QString countryToString(QLocale::Country country)
QString languageToString(QLocale::Language language)
QList<QLocale> matchingLocales(QLocale::Language language, QLocale::Script script, QLocale::Country country)
QString scriptToString(QLocale::Script script)
void setDefault(const QLocale &locale)
QLocale system()
uint qHash(const QLocale &key, uint seed = 0)

Detailed Description

QLocale is initialized with a language/country pair in its constructor and offers number-to-string and string-to-number conversion functions similar to those in QString.

Example:

QLocale egyptian(QLocale::Arabic, QLocale::Egypt);
QString s1 = egyptian.toString(1.571429E+07, 'e');
QString s2 = egyptian.toString(10);

double d = egyptian.toDouble(s1);
int i = egyptian.toInt(s2);

QLocale supports the concept of a default locale, which is determined from the system's locale settings at application startup. The default locale can be changed by calling the static member setDefault(). Setting the default locale has the following effects:

  • If a QLocale object is constructed with the default constructor, it will use the default locale's settings.
  • QString::toInt(), QString::toDouble(), etc., interpret the string according to the default locale. If this fails, it falls back on the "C" locale.
  • QString::arg() uses the default locale to format a number when its position specifier in the format string contains an 'L', e.g. "%L1".

The following example illustrates how to use QLocale directly:

QLocale::setDefault(QLocale(QLocale::Hebrew, QLocale::Israel));
QLocale hebrew; // Constructs a default QLocale
QString s1 = hebrew.toString(15714.3, 'e');

bool ok;
double d;

QLocale::setDefault(QLocale::C);
d = QString("1234,56").toDouble(&ok);   // ok == false
d = QString("1234.56").toDouble(&ok);   // ok == true, d == 1234.56

QLocale::setDefault(QLocale::German);
d = QString("1234,56").toDouble(&ok);   // ok == true, d == 1234.56
d = QString("1234.56").toDouble(&ok);   // ok == true, d == 1234.56

QLocale::setDefault(QLocale(QLocale::English, QLocale::UnitedStates));
str = QString("%1 %L2 %L3")
      .arg(12345).arg(12345).arg(12345, 0, 16);
// str == "12345 12,345 3039"

When a language/country pair is specified in the constructor, one of three things can happen:

  • If the language/country pair is found in the database, it is used.
  • If the language is found but the country is not, or if the country is AnyCountry, the language is used with the most appropriate available country (for example, Germany for German),
  • If neither the language nor the country are found, QLocale defaults to the default locale (see setDefault()).

Use language() and country() to determine the actual language and country values used.

An alternative method for constructing a QLocale object is by specifying the locale name.

QLocale korean("ko");
QLocale swiss("de_CH");

This constructor converts the locale name to a language/country pair; it does not use the system locale database.

Note: For the current keyboard input locale take a look at QInputMethod::locale().

QLocale's data is based on Common Locale Data Repository v36.

See also QString::arg(), QString::toInt(), QString::toDouble(), and QInputMethod::locale().

Member Type Documentation

enum QLocale::Country

This enumerated type is used to specify a country.

Constant Value Description
QLocale::AnyCountry 0
QLocale::Afghanistan 1
QLocale::AlandIslands 248
QLocale::Albania 2
QLocale::Algeria 3
QLocale::AmericanSamoa 4
QLocale::Andorra 5
QLocale::Angola 6
QLocale::Anguilla 7
QLocale::Antarctica 8
QLocale::AntiguaAndBarbuda 9
QLocale::Argentina 10
QLocale::Armenia 11
QLocale::Aruba 12
QLocale::AscensionIsland 247
QLocale::Australia 13
QLocale::Austria 14
QLocale::Azerbaijan 15
QLocale::Bahamas 16
QLocale::Bahrain 17
QLocale::Bangladesh 18
QLocale::Barbados 19
QLocale::Belarus 20
QLocale::Belgium 21
QLocale::Belize 22
QLocale::Benin 23
QLocale::Bermuda 24
QLocale::Bhutan 25
QLocale::Bolivia 26
QLocale::Bonaire 255
QLocale::BosniaAndHerzegowina 27
QLocale::Botswana 28
QLocale::BouvetIsland 29
QLocale::Brazil 30
QLocale::BritishIndianOceanTerritory 31
QLocale::BritishVirginIslands 233
QLocale::Brunei 32
QLocale::Bulgaria 33
QLocale::BurkinaFaso 34
QLocale::Burundi 35
QLocale::Cambodia 36
QLocale::Cameroon 37
QLocale::Canada 38
QLocale::CanaryIslands 238
QLocale::CapeVerde 39
QLocale::CaymanIslands 40
QLocale::CentralAfricanRepublic 41
QLocale::CeutaAndMelilla 250
QLocale::Chad 42
QLocale::Chile 43
QLocale::China 44
QLocale::ChristmasIsland 45
QLocale::ClippertonIsland 241
QLocale::CocosIslands 46
QLocale::Colombia 47
QLocale::Comoros 48
QLocale::CongoBrazzaville 50
QLocale::CongoKinshasa 49
QLocale::CookIslands 51
QLocale::CostaRica 52
QLocale::Croatia 54
QLocale::Cuba 55
QLocale::CuraSao 152
QLocale::Cyprus 56
QLocale::CzechRepublic 57
QLocale::DemocraticRepublicOfCongo CongoKinshasa Obsolete, please use CongoKinshasa
QLocale::DemocraticRepublicOfKorea NorthKorea Obsolete, please use NorthKorea
QLocale::Denmark 58
QLocale::DiegoGarcia 249
QLocale::Djibouti 59
QLocale::Dominica 60
QLocale::DominicanRepublic 61
QLocale::EastTimor 62
QLocale::Ecuador 63
QLocale::Egypt 64
QLocale::ElSalvador 65
QLocale::EquatorialGuinea 66
QLocale::Eritrea 67
QLocale::Estonia 68
QLocale::Ethiopia 69
QLocale::EuropeanUnion 258 Since Qt 5.7
QLocale::Europe 261 Since Qt 5.12
QLocale::FalklandIslands 70
QLocale::FaroeIslands 71
QLocale::Fiji 72
QLocale::Finland 73
QLocale::France 74
QLocale::FrenchGuiana 76
QLocale::FrenchPolynesia 77
QLocale::FrenchSouthernTerritories 78
QLocale::Gabon 79
QLocale::Gambia 80
QLocale::Georgia 81
QLocale::Germany 82
QLocale::Ghana 83
QLocale::Gibraltar 84
QLocale::Greece 85
QLocale::Greenland 86
QLocale::Grenada 87
QLocale::Guadeloupe 88
QLocale::Guam 89
QLocale::Guatemala 90
QLocale::Guernsey 75
QLocale::Guinea 91
QLocale::GuineaBissau 92
QLocale::Guyana 93
QLocale::Haiti 94
QLocale::HeardAndMcDonaldIslands 95
QLocale::Honduras 96
QLocale::HongKong 97
QLocale::Hungary 98
QLocale::Iceland 99
QLocale::India 100
QLocale::Indonesia 101
QLocale::Iran 102
QLocale::Iraq 103
QLocale::Ireland 104
QLocale::IsleOfMan 251
QLocale::Israel 105
QLocale::Italy 106
QLocale::IvoryCoast 53
QLocale::Jamaica 107
QLocale::Japan 108
QLocale::Jersey 252
QLocale::Jordan 109
QLocale::Kazakhstan 110
QLocale::Kenya 111
QLocale::Kiribati 112
QLocale::Kosovo 257 Since Qt 5.2
QLocale::Kuwait 115
QLocale::Kyrgyzstan 116
QLocale::Laos 117
QLocale::LatinAmerica 246
QLocale::LatinAmericaAndTheCaribbean LatinAmerica Obsolete, please use LatinAmerica
QLocale::Latvia 118
QLocale::Lebanon 119
QLocale::Lesotho 120
QLocale::Liberia 121
QLocale::Libya 122
QLocale::Liechtenstein 123
QLocale::Lithuania 124
QLocale::Luxembourg 125
QLocale::Macau 126
QLocale::Macedonia 127
QLocale::Madagascar 128
QLocale::Malawi 129
QLocale::Malaysia 130
QLocale::Maldives 131
QLocale::Mali 132
QLocale::Malta 133
QLocale::MarshallIslands 134
QLocale::Martinique 135
QLocale::Mauritania 136
QLocale::Mauritius 137
QLocale::Mayotte 138
QLocale::Mexico 139
QLocale::Micronesia 140
QLocale::Moldova 141
QLocale::Monaco 142
QLocale::Mongolia 143
QLocale::Montenegro 242
QLocale::Montserrat 144
QLocale::Morocco 145
QLocale::Mozambique 146
QLocale::Myanmar 147
QLocale::Namibia 148
QLocale::NauruCountry 149
QLocale::Nepal 150
QLocale::Netherlands 151
QLocale::NewCaledonia 153
QLocale::NewZealand 154
QLocale::Nicaragua 155
QLocale::Niger 156
QLocale::Nigeria 157
QLocale::Niue 158
QLocale::NorfolkIsland 159
QLocale::NorthernMarianaIslands 160
QLocale::NorthKorea 113
QLocale::Norway 161
QLocale::Oman 162
QLocale::OutlyingOceania 259 Since Qt 5.7
QLocale::Pakistan 163
QLocale::Palau 164
QLocale::PalestinianTerritories 165
QLocale::Panama 166
QLocale::PapuaNewGuinea 167
QLocale::Paraguay 168
QLocale::PeoplesRepublicOfCongo CongoBrazzaville Obsolete, please use CongoBrazzaville
QLocale::Peru 169
QLocale::Philippines 170
QLocale::Pitcairn 171
QLocale::Poland 172
QLocale::Portugal 173
QLocale::PuertoRico 174
QLocale::Qatar 175
QLocale::RepublicOfKorea SouthKorea Obsolete, please use SouthKorea
QLocale::Reunion 176
QLocale::Romania 177
QLocale::RussianFederation Russia same as Russia
QLocale::Russia 178 same as RussianFederation
QLocale::Rwanda 179
QLocale::SaintBarthelemy 244
QLocale::SaintHelena 199
QLocale::SaintKittsAndNevis 180
QLocale::SaintLucia 181
QLocale::SaintMartin 245
QLocale::SaintPierreAndMiquelon 200
QLocale::SaintVincentAndTheGrenadines 182
QLocale::Samoa 183
QLocale::SanMarino 184
QLocale::SaoTomeAndPrincipe 185
QLocale::SaudiArabia 186
QLocale::Senegal 187
QLocale::Serbia 243
QLocale::Seychelles 188
QLocale::SierraLeone 189
QLocale::Singapore 190
QLocale::SintMaarten 256
QLocale::Slovakia 191
QLocale::Slovenia 192
QLocale::SolomonIslands 193
QLocale::Somalia 194
QLocale::SouthAfrica 195
QLocale::SouthGeorgiaAndTheSouthSandwichIslands 196
QLocale::SouthKorea 114
QLocale::SouthSudan 254
QLocale::Spain 197
QLocale::SriLanka 198
QLocale::Sudan 201
QLocale::Suriname 202
QLocale::SvalbardAndJanMayenIslands 203
QLocale::Swaziland 204
QLocale::Sweden 205
QLocale::Switzerland 206
QLocale::Syria 207
QLocale::SyrianArabRepublic Syria Obsolete, please use Syria
QLocale::Taiwan 208
QLocale::Tajikistan 209
QLocale::Tanzania 210
QLocale::Thailand 211
QLocale::Togo 212
QLocale::TokelauCountry 213
QLocale::Tokelau TokelauCountry Obsolete, please use TokelauCountry
QLocale::Tonga 214
QLocale::TrinidadAndTobago 215
QLocale::TristanDaCunha 253
QLocale::Tunisia 216
QLocale::Turkey 217
QLocale::Turkmenistan 218
QLocale::TurksAndCaicosIslands 219
QLocale::TuvaluCountry 220
QLocale::Tuvalu TuvaluCountry Obsolete, please use TuvaluCountry
QLocale::Uganda 221
QLocale::Ukraine 222
QLocale::UnitedArabEmirates 223
QLocale::UnitedKingdom 224
QLocale::UnitedStates 225
QLocale::UnitedStatesMinorOutlyingIslands 226
QLocale::UnitedStatesVirginIslands 234
QLocale::Uruguay 227
QLocale::Uzbekistan 228
QLocale::Vanuatu 229
QLocale::VaticanCityState 230
QLocale::Venezuela 231
QLocale::Vietnam 232
QLocale::WallisAndFutunaIslands 235
QLocale::WesternSahara 236
QLocale::World 260 Since Qt 5.12
QLocale::Yemen 237
QLocale::Zambia 239
QLocale::Zimbabwe 240

See also country() and countryToString().

enum QLocale::CurrencySymbolFormat

Specifies the format of the currency symbol.

Constant Value Description
QLocale::CurrencyIsoCode 0 a ISO-4217 code of the currency.
QLocale::CurrencySymbol 1 a currency symbol.
QLocale::CurrencyDisplayName 2 a user readable name of the currency.

This enum was introduced or modified in Qt 4.8.

enum QLocale::DataSizeFormatflags QLocale::DataSizeFormats

Specifies the format for representation of data quantities.

Constant Value Description
QLocale::DataSizeIecFormat 0 format using base 1024 and IEC prefixes: KiB, MiB, GiB, ...
QLocale::DataSizeTraditionalFormat DataSizeSIQuantifiers format using base 1024 and SI prefixes: kB, MB, GB, ...
QLocale::DataSizeSIFormat DataSizeBase1000 | DataSizeSIQuantifiers format using base 1000 and SI prefixes: kB, MB, GB, ...

This enum was introduced or modified in Qt 5.10.

The DataSizeFormats type is a typedef for QFlags<DataSizeFormat>. It stores an OR combination of DataSizeFormat values.

See also formattedDataSize().

enum QLocale::FloatingPointPrecisionOption

This enum defines constants that can be given as precision to QString::number(), QByteArray::number(), and QLocale::toString() when converting floats or doubles, in order to express a variable number of digits as precision.

Constant Value Description
QLocale::FloatingPointShortest -128 The conversion algorithm will try to find the shortest accurate representation for the given number. "Accurate" means that you get the exact same number back from an inverse conversion on the generated string representation.

This enum was introduced or modified in Qt 5.7.

See also toString(), QString, and QByteArray.

enum QLocale::FormatType

This enum describes the different formats that can be used when converting QDate, QTime, and QDateTime objects, as well as months and days, to strings specific to the locale.

Constant Value Description
QLocale::LongFormat 0 Longer format.
QLocale::ShortFormat 1 Shorter format.
QLocale::NarrowFormat 2 A special version for use when space is very limited.

Note: NarrowFormat might contain the same text for different months and days. It can even be an empty string if the locale doesn't support narrow names, so you should avoid using it for date formatting. Also, for the system locale this format is the same as ShortFormat.

See also dateFormat(), timeFormat(), dateTimeFormat(), monthName(), standaloneMonthName(), dayName(), standaloneDayName(), toDate(), toTime(), and toDateTime().

enum QLocale::Language

This enumerated type is used to specify a language.

Constant Value Description
QLocale::AnyLanguage 0
QLocale::C 1 A simplified English locale; see QLocale::c()
QLocale::Abkhazian 2
QLocale::Afan Oromo Obsolete, please use Oromo
QLocale::Afar 4
QLocale::Afrikaans 5
QLocale::Aghem 237
QLocale::Ahom 340 Since Qt 5.7
QLocale::Akan 146
QLocale::Akkadian 262 Since Qt 5.1
QLocale::Akoose 312 Since Qt 5.3
QLocale::Albanian 6
QLocale::AmericanSignLanguage 341 Since Qt 5.7
QLocale::Amharic 7
QLocale::AncientEgyptian 263 Since Qt 5.1
QLocale::AncientGreek 264 Since Qt 5.1
QLocale::AncientNorthArabian 331 Since Qt 5.5
QLocale::Arabic 8
QLocale::Aragonese 261 Since Qt 5.1
QLocale::Aramaic 265 Since Qt 5.1
QLocale::ArdhamagadhiPrakrit 342 Since Qt 5.7
QLocale::Armenian 9
QLocale::Assamese 10
QLocale::Asturian 256
QLocale::Asu 205
QLocale::Atsam 156
QLocale::Avaric 216
QLocale::Avestan 255
QLocale::Aymara 11
QLocale::Azerbaijani 12
QLocale::Bafia 243
QLocale::Balinese 266 Since Qt 5.1
QLocale::Bambara 188
QLocale::Bamun 267 Since Qt 5.1
QLocale::Basaa 238
QLocale::Bashkir 13
QLocale::Basque 14
QLocale::Bassa 336 Since Qt 5.5
QLocale::BatakToba 268 Since Qt 5.1
QLocale::Belarusian 22
QLocale::Bemba 195
QLocale::Bena 186
QLocale::Bengali 15
QLocale::Bhojpuri 343 Since Qt 5.7
QLocale::Bhutani Dzongkha Obsolete, please use Dzongkha
QLocale::Bihari 17
QLocale::Bislama 18
QLocale::Blin 152
QLocale::Bodo 215
QLocale::Bosnian 142
QLocale::Breton 19
QLocale::Buginese 269 Since Qt 5.1
QLocale::Buhid 270 Since Qt 5.1
QLocale::Bulgarian 20
QLocale::Burmese 21
QLocale::Byelorussian Belarusian Obsolete, please use Belarusian
QLocale::Cambodian Khmer Obsolete, please use Khmer
QLocale::Cantonese 357 Since Qt 5.7
QLocale::Carian 271 Since Qt 5.1
QLocale::Catalan 24
QLocale::Cebuano 365 Since Qt 5.14
QLocale::CentralKurdish 316 Since Qt 5.5
QLocale::CentralMoroccoTamazight 212
QLocale::Chakma 272 Since Qt 5.1
QLocale::Chamorro 217
QLocale::Chechen 218
QLocale::Cherokee 190
QLocale::Chewa Nyanja Obsolete, please use Nyanja
QLocale::Chickasaw 367 Since Qt 5.14
QLocale::Chiga 211
QLocale::Chinese 25 (Mandarin)
QLocale::Church 219
QLocale::Chuvash 220
QLocale::ClassicalMandaic 273 Since Qt 5.1
QLocale::Colognian 201
QLocale::CongoSwahili 250
QLocale::Coptic 274 Since Qt 5.1
QLocale::Cornish 145
QLocale::Corsican 26
QLocale::Cree 221
QLocale::Croatian 27
QLocale::Czech 28
QLocale::Danish 29
QLocale::Divehi 143
QLocale::Dogri 275 Since Qt 5.1
QLocale::Duala 240
QLocale::Dutch 30
QLocale::Dzongkha 16
QLocale::EasternCham 276 Since Qt 5.1
QLocale::EasternKayah 277 Since Qt 5.1
QLocale::Embu 189
QLocale::English 31
QLocale::Erzya 366 Since Qt 5.14
QLocale::Esperanto 32
QLocale::Estonian 33
QLocale::Etruscan 278 Since Qt 5.1
QLocale::Ewe 161
QLocale::Ewondo 242
QLocale::Faroese 34
QLocale::Fijian 35
QLocale::Filipino 166
QLocale::Finnish 36
QLocale::French 37
QLocale::Frisian WesternFrisian same as WesternFrisian
QLocale::Friulian 159
QLocale::Fulah 177
QLocale::Ga 148
QLocale::Gaelic 39
QLocale::Galician 40
QLocale::Ganda 194
QLocale::Geez 153
QLocale::Georgian 41
QLocale::German 42
QLocale::Gothic 279 Since Qt 5.1
QLocale::Greek 43
QLocale::Greenlandic 44
QLocale::Guarani 45
QLocale::Gujarati 46
QLocale::Gusii 175
QLocale::Haitian 222
QLocale::Hanunoo 280 Since Qt 5.1
QLocale::Hausa 47
QLocale::Hawaiian 163
QLocale::Hebrew 48
QLocale::Herero 223
QLocale::HieroglyphicLuwian 344 Since Qt 5.7
QLocale::Hindi 49
QLocale::HiriMotu 224
QLocale::HmongNjua 333 Since Qt 5.5
QLocale::Ho 334 Since Qt 5.5
QLocale::Hungarian 50
QLocale::Icelandic 51
QLocale::Ido 360 Since Qt 5.12
QLocale::Igbo 149
QLocale::InariSami 326 Since Qt 5.5
QLocale::Indonesian 52
QLocale::Ingush 281 Since Qt 5.1
QLocale::Interlingua 53
QLocale::Interlingue 54
QLocale::Inuktitut 55
QLocale::Inupiak 56
QLocale::Irish 57
QLocale::Italian 58
QLocale::Japanese 59
QLocale::Javanese 60
QLocale::Jju 158
QLocale::JolaFonyi 241
QLocale::Kabuverdianu 196
QLocale::Kabyle 184
QLocale::Kako 258
QLocale::Kalenjin 198
QLocale::Kamba 150
QLocale::Kannada 61
QLocale::Kanuri 225
QLocale::Kashmiri 62
QLocale::Kazakh 63
QLocale::Kenyang 319 Since Qt 5.5
QLocale::Khmer 23
QLocale::Kiche 323 Since Qt 5.5
QLocale::Kikuyu 178
QLocale::Kinyarwanda 64
QLocale::Kirghiz 65
QLocale::Komi 226
QLocale::Kongo 227
QLocale::Konkani 147
QLocale::Korean 66
QLocale::Koro 154
QLocale::KoyraboroSenni 213
QLocale::KoyraChiini 208
QLocale::Kpelle 169
QLocale::Kurdish 67
QLocale::Kurundi Rundi Obsolete, please use Rundi
QLocale::Kwanyama 228
QLocale::Kwasio 246
QLocale::Lakota 313 Since Qt 5.3
QLocale::Langi 193
QLocale::Lao 69
QLocale::LargeFloweryMiao 282 Since Qt 5.1
QLocale::Latin 70
QLocale::Latvian 71
QLocale::Lepcha 283 Since Qt 5.1
QLocale::Lezghian 335 Since Qt 5.5
QLocale::Limburgish 229
QLocale::Limbu 284 Since Qt 5.1
QLocale::LinearA 332 Since Qt 5.5
QLocale::Lingala 72
QLocale::Lisu 285 Since Qt 5.1
QLocale::LiteraryChinese 345 Since Qt 5.7
QLocale::Lithuanian 73
QLocale::Lojban 361 Since Qt 5.12
QLocale::LowerSorbian 317 Since Qt 5.5
QLocale::LowGerman 170
QLocale::LubaKatanga 230
QLocale::LuleSami 325 Since Qt 5.5
QLocale::Luo 210
QLocale::Lu 286 Since Qt 5.1
QLocale::Luxembourgish 231
QLocale::Luyia 204
QLocale::Lycian 287 Since Qt 5.1
QLocale::Lydian 288 Since Qt 5.1
QLocale::Macedonian 74
QLocale::Machame 200
QLocale::Maithili 339 Since Qt 5.5
QLocale::MakhuwaMeetto 244
QLocale::Makonde 192
QLocale::Malagasy 75
QLocale::Malay 76
QLocale::Malayalam 77
QLocale::Maltese 78
QLocale::Mandingo 289 Since Qt 5.1
QLocale::ManichaeanMiddlePersian 329 Since Qt 5.5
QLocale::Manipuri 290 Since Qt 5.1
QLocale::Manx 144
QLocale::Maori 79
QLocale::Mapuche 315 Since Qt 5.5
QLocale::Marathi 80
QLocale::Marshallese 81
QLocale::Masai 202
QLocale::Mazanderani 346 Since Qt 5.7
QLocale::Mende 330 Since Qt 5.5
QLocale::Meroitic 291 Since Qt 5.1
QLocale::Meru 197
QLocale::Meta 259
QLocale::Mohawk 320 Since Qt 5.5
QLocale::Moldavian Romanian Obsolete, please use Romanian
QLocale::Mongolian 82
QLocale::Mono 337 Since Qt 5.5
QLocale::Morisyen 191
QLocale::Mru 347 Since Qt 5.7
QLocale::Mundang 245
QLocale::Muscogee 368 Since Qt 5.14
QLocale::Nama 199
QLocale::NauruLanguage 83
QLocale::Navaho 232
QLocale::Ndonga 233
QLocale::Nepali 84
QLocale::Newari 348 Since Qt 5.7
QLocale::Ngiemboon 260
QLocale::Ngomba 257
QLocale::Nko 321 Since Qt 5.5
QLocale::NorthernLuri 349 Since Qt 5.7
QLocale::NorthernSami 173
QLocale::NorthernSotho 172
QLocale::NorthernThai 292 Since Qt 5.1
QLocale::NorthNdebele 181
QLocale::NorwegianBokmal 85 same as Norwegian
QLocale::NorwegianNynorsk 141
QLocale::Norwegian NorwegianBokmal same as NorwegianBokmal
QLocale::Nuer 247
QLocale::Nyanja 165
QLocale::Nyankole 185
QLocale::Occitan 86
QLocale::Ojibwa 234
QLocale::OldIrish 293 Since Qt 5.1
QLocale::OldNorse 294 Since Qt 5.1
QLocale::OldPersian 295 Since Qt 5.1
QLocale::OldTurkish 296 Since Qt 5.1
QLocale::Oriya 87
QLocale::Oromo 3
QLocale::Osage 358 Since Qt 5.7
QLocale::Ossetic 101
QLocale::Pahlavi 297 Since Qt 5.1
QLocale::Palauan 350 Since Qt 5.7
QLocale::Pali 235
QLocale::Papiamento 351 Since Qt 5.7
QLocale::Parthian 298 Since Qt 5.1
QLocale::Pashto 88
QLocale::Persian 89
QLocale::Phoenician 299 Since Qt 5.1
QLocale::Polish 90
QLocale::Portuguese 91
QLocale::PrakritLanguage 300 Since Qt 5.1
QLocale::Prussian 322 Since Qt 5.5
QLocale::Punjabi 92
QLocale::Quechua 93
QLocale::Rejang 301 Since Qt 5.1
QLocale::RhaetoRomance Romansh Obsolete, please use Romansh
QLocale::Romanian 95
QLocale::Romansh 94
QLocale::Rombo 182
QLocale::Rundi 68
QLocale::Russian 96
QLocale::Rwa 209
QLocale::Sabaean 302 Since Qt 5.1
QLocale::Saho 207
QLocale::Sakha 248
QLocale::Samaritan 303 Since Qt 5.1
QLocale::Samburu 179
QLocale::Samoan 97
QLocale::Sango 98
QLocale::Sangu 249
QLocale::Sanskrit 99
QLocale::Santali 304 Since Qt 5.1
QLocale::Saraiki 352 Since Qt 5.7
QLocale::Sardinian 115
QLocale::Saurashtra 305 Since Qt 5.1
QLocale::Sena 180
QLocale::Serbian 100
QLocale::SerboCroatian Serbian Obsolete, please use Serbian
QLocale::Shambala 214
QLocale::Shona 104
QLocale::SichuanYi 168
QLocale::Sicilian 362 Since Qt 5.12
QLocale::Sidamo 155
QLocale::Silesian 369 Since Qt 5.14
QLocale::Sindhi 105
QLocale::Sinhala 106
QLocale::SkoltSami 327 Since Qt 5.5
QLocale::Slovak 108
QLocale::Slovenian 109
QLocale::Soga 203
QLocale::Somali 110
QLocale::Sora 306 Since Qt 5.1
QLocale::SouthernKurdish 363 Since Qt 5.12
QLocale::SouthernSami 324 Since Qt 5.5
QLocale::SouthernSotho 102
QLocale::SouthNdebele 171
QLocale::Spanish 111
QLocale::StandardMoroccanTamazight 314 Since Qt 5.3
QLocale::Sundanese 112
QLocale::Swahili 113
QLocale::Swati 107
QLocale::Swedish 114
QLocale::SwissGerman 167
QLocale::Sylheti 307 Since Qt 5.1
QLocale::Syriac 151
QLocale::Tachelhit 183
QLocale::Tagalog Filipino Obsolete, please use Filipino
QLocale::Tagbanwa 308 Since Qt 5.1
QLocale::Tahitian 127
QLocale::TaiDam 309 Since Qt 5.1
QLocale::TaiNua 310 Since Qt 5.1
QLocale::Taita 176
QLocale::Tajik 116
QLocale::Tamil 117
QLocale::Tangut 359 Since Qt 5.7
QLocale::Taroko 174
QLocale::Tasawaq 251
QLocale::Tatar 118
QLocale::TedimChin 338 Since Qt 5.5
QLocale::Telugu 119
QLocale::Teso 206
QLocale::Thai 120
QLocale::Tibetan 121
QLocale::Tigre 157
QLocale::Tigrinya 122
QLocale::TokelauLanguage 353 Since Qt 5.7
QLocale::TokPisin 354 Since Qt 5.7
QLocale::Tongan 123
QLocale::Tsonga 124
QLocale::Tswana 103
QLocale::Turkish 125
QLocale::Turkmen 126
QLocale::TuvaluLanguage 355 Since Qt 5.7
QLocale::Twi Akan Obsolete, please use Akan
QLocale::Tyap 164
QLocale::Ugaritic 311 Since Qt 5.1
QLocale::Uighur 128
QLocale::Uigur Uighur Obsolete, please use Uighur
QLocale::Ukrainian 129
QLocale::UncodedLanguages 356 Since Qt 5.7
QLocale::UpperSorbian 318 Since Qt 5.5
QLocale::Urdu 130
QLocale::Uzbek 131
QLocale::Vai 252
QLocale::Venda 160
QLocale::Vietnamese 132
QLocale::Volapuk 133
QLocale::Vunjo 187
QLocale::Walamo 162
QLocale::Walloon 236
QLocale::Walser 253
QLocale::Warlpiri 328 Since Qt 5.5
QLocale::Welsh 134
QLocale::WesternBalochi 364 Since Qt 5.12
QLocale::WesternFrisian 38 same as Frisian
QLocale::Wolof 135
QLocale::Xhosa 136
QLocale::Yangben 254
QLocale::Yiddish 137
QLocale::Yoruba 138
QLocale::Zarma 239
QLocale::Zhuang 139
QLocale::Zulu 140

See also language() and languageToString().

enum QLocale::MeasurementSystem

This enum defines which units are used for measurement.

Constant Value Description
QLocale::MetricSystem 0 This value indicates metric units, such as meters, centimeters and millimeters.
QLocale::ImperialUSSystem 1 This value indicates imperial units, such as inches and miles as they are used in the United States.
QLocale::ImperialUKSystem 2 This value indicates imperial units, such as inches and miles as they are used in the United Kingdom.
QLocale::ImperialSystem ImperialUSSystem Provided for compatibility. Same as ImperialUSSystem

This enum was introduced or modified in Qt 4.4.

enum QLocale::NumberOptionflags QLocale::NumberOptions

This enum defines a set of options for number-to-string and string-to-number conversions. They can be retrieved with numberOptions() and set with setNumberOptions().

Constant Value Description
QLocale::DefaultNumberOptions 0x0 This option represents the default behavior, with group separators, with one leading zero in single digit exponents, and without trailing zeroes after the decimal dot.
QLocale::OmitGroupSeparator 0x01 If this option is set, the number-to-string functions will not insert group separators in their return values. The default is to insert group separators.
QLocale::RejectGroupSeparator 0x02 If this option is set, the string-to-number functions will fail if they encounter group separators in their input. The default is to accept numbers containing correctly placed group separators.
QLocale::OmitLeadingZeroInExponent 0x04 If this option is set, the number-to-string functions will not pad exponents with zeroes when printing floating point numbers in scientific notation. The default is to add one leading zero to single digit exponents.
QLocale::RejectLeadingZeroInExponent 0x08 If this option is set, the string-to-number functions will fail if they encounter an exponent padded with zeroes when parsing a floating point number in scientific notation. The default is to accept such padding.
QLocale::IncludeTrailingZeroesAfterDot 0x10 If this option is set, the number-to-string functions will pad numbers with zeroes to the requested precision in "g" or "most concise" mode, even if the number of significant digits is lower than the requested precision. The default is to omit trailing zeroes.
QLocale::RejectTrailingZeroesAfterDot 0x20 If this option is set, the string-to-number functions will fail if they encounter trailing zeroes after the decimal dot when parsing a number in scientific or decimal representation. The default is to accept trailing zeroes.

The NumberOptions type is a typedef for QFlags<NumberOption>. It stores an OR combination of NumberOption values.

See also setNumberOptions() and numberOptions().

enum QLocale::QuotationStyle

This enum defines a set of possible styles for locale specific quotation.

Constant Value Description
QLocale::StandardQuotation 0 If this option is set, the standard quotation marks will be used to quote strings.
QLocale::AlternateQuotation 1 If this option is set, the alternate quotation marks will be used to quote strings.

This enum was introduced or modified in Qt 4.8.

See also quoteString().

enum QLocale::Script

This enumerated type is used to specify a script.

Constant Value Description
QLocale::AnyScript 0
QLocale::AdlamScript 134 Since Qt 5.7
QLocale::AhomScript 128 Since Qt 5.7
QLocale::AnatolianHieroglyphsScript 129 Since Qt 5.7
QLocale::ArabicScript 1
QLocale::ArmenianScript 10
QLocale::AvestanScript 36 Since Qt 5.1
QLocale::BalineseScript 37 Since Qt 5.1
QLocale::BamumScript 38 Since Qt 5.1
QLocale::BassaVahScript 106 Since Qt 5.5
QLocale::BatakScript 39 Since Qt 5.1
QLocale::BengaliScript 11
QLocale::BhaiksukiScript 135 Since Qt 5.7
QLocale::BopomofoScript 40 Since Qt 5.1
QLocale::BrahmiScript 41 Since Qt 5.1
QLocale::BrailleScript 103 Since Qt 5.1
QLocale::BugineseScript 42 Since Qt 5.1
QLocale::BuhidScript 43 Since Qt 5.1
QLocale::CanadianAboriginalScript 44 Since Qt 5.1
QLocale::CarianScript 45 Since Qt 5.1
QLocale::CaucasianAlbanianScript 105 Since Qt 5.5
QLocale::ChakmaScript 46 Since Qt 5.1
QLocale::ChamScript 47 Since Qt 5.1
QLocale::CherokeeScript 12
QLocale::CopticScript 48 Since Qt 5.1
QLocale::CuneiformScript 94 Since Qt 5.1
QLocale::CypriotScript 49 Since Qt 5.1
QLocale::CyrillicScript 2
QLocale::DeseretScript 3 Since Qt 5.1
QLocale::DevanagariScript 13
QLocale::DuployanScript 107 Since Qt 5.5
QLocale::EgyptianHieroglyphsScript 50 Since Qt 5.1
QLocale::ElbasanScript 108 Since Qt 5.5
QLocale::EthiopicScript 14
QLocale::FraserScript 51 Since Qt 5.1
QLocale::GeorgianScript 15
QLocale::GlagoliticScript 52 Since Qt 5.1
QLocale::GothicScript 53 Since Qt 5.1
QLocale::GranthaScript 109 Since Qt 5.5
QLocale::GreekScript 16
QLocale::GujaratiScript 17
QLocale::GurmukhiScript 4
QLocale::HangulScript 55 Since Qt 5.1
QLocale::HanScript 54 Since Qt 5.1
QLocale::HanunooScript 56 Since Qt 5.1
QLocale::HanWithBopomofoScript 140 Since Qt 5.7
QLocale::HatranScript 130 Since Qt 5.7
QLocale::HebrewScript 18
QLocale::HiraganaScript 104 Since Qt 5.1
QLocale::ImperialAramaicScript 57 Since Qt 5.1
QLocale::InscriptionalPahlaviScript 58 Since Qt 5.1
QLocale::InscriptionalParthianScript 59 Since Qt 5.1
QLocale::JamoScript 141 Since Qt 5.7
QLocale::JapaneseScript 19
QLocale::JavaneseScript 60 Since Qt 5.1
QLocale::KaithiScript 61 Since Qt 5.1
QLocale::KannadaScript 21
QLocale::KatakanaScript 62 Since Qt 5.1
QLocale::KayahLiScript 63 Since Qt 5.1
QLocale::KharoshthiScript 64 Since Qt 5.1
QLocale::KhmerScript 20 Since Qt 5.1
QLocale::KhojkiScript 111 Since Qt 5.5
QLocale::KhudawadiScript 125 Since Qt 5.5
QLocale::KoreanScript 22
QLocale::LannaScript 65 Since Qt 5.1
QLocale::LaoScript 23
QLocale::LatinScript 7
QLocale::LepchaScript 66 Since Qt 5.1
QLocale::LimbuScript 67 Since Qt 5.1
QLocale::LinearAScript 112 Since Qt 5.5
QLocale::LinearBScript 68 Since Qt 5.1
QLocale::LycianScript 69 Since Qt 5.1
QLocale::LydianScript 70 Since Qt 5.1
QLocale::MahajaniScript 113 Since Qt 5.5
QLocale::MalayalamScript 24
QLocale::MandaeanScript 71 Since Qt 5.1
QLocale::ManichaeanScript 114 Since Qt 5.5
QLocale::MarchenScript 136 Since Qt 5.7
QLocale::MeiteiMayekScript 72 Since Qt 5.1
QLocale::MendeKikakuiScript 115 Since Qt 5.5
QLocale::MeroiticCursiveScript 74 Since Qt 5.1
QLocale::MeroiticScript 73 Since Qt 5.1
QLocale::ModiScript 116 Since Qt 5.5
QLocale::MongolianScript 8
QLocale::MroScript 117 Since Qt 5.5
QLocale::MultaniScript 131 Since Qt 5.7
QLocale::MyanmarScript 25
QLocale::NabataeanScript 119 Since Qt 5.5
QLocale::NewaScript 137 Since Qt 5.7
QLocale::NewTaiLueScript 76 Since Qt 5.1
QLocale::NkoScript 75 Since Qt 5.1
QLocale::OghamScript 77 Since Qt 5.1
QLocale::OlChikiScript 78 Since Qt 5.1
QLocale::OldHungarianScript 132 Since Qt 5.7
QLocale::OldItalicScript 79 Since Qt 5.1
QLocale::OldNorthArabianScript 118 Since Qt 5.5
QLocale::OldPermicScript 122 Since Qt 5.5
QLocale::OldPersianScript 80 Since Qt 5.1
QLocale::OldSouthArabianScript 81 Since Qt 5.1
QLocale::OriyaScript 26
QLocale::OrkhonScript 82 Since Qt 5.1
QLocale::OsageScript 138 Since Qt 5.7
QLocale::OsmanyaScript 83 Since Qt 5.1
QLocale::PahawhHmongScript 110 Since Qt 5.5
QLocale::PalmyreneScript 120 Since Qt 5.5
QLocale::PauCinHauScript 121 Since Qt 5.5
QLocale::PhagsPaScript 84 Since Qt 5.1
QLocale::PhoenicianScript 85 Since Qt 5.1
QLocale::PollardPhoneticScript 86 Since Qt 5.1
QLocale::PsalterPahlaviScript 123 Since Qt 5.5
QLocale::RejangScript 87 Since Qt 5.1
QLocale::RunicScript 88 Since Qt 5.1
QLocale::SamaritanScript 89 Since Qt 5.1
QLocale::SaurashtraScript 90 Since Qt 5.1
QLocale::SharadaScript 91 Since Qt 5.1
QLocale::ShavianScript 92 Since Qt 5.1
QLocale::SiddhamScript 124 Since Qt 5.5
QLocale::SignWritingScript 133 Since Qt 5.7
QLocale::SimplifiedChineseScript SimplifiedHanScript same as SimplifiedHanScript
QLocale::SimplifiedHanScript 5 same as SimplifiedChineseScript
QLocale::SinhalaScript 32
QLocale::SoraSompengScript 93 Since Qt 5.1
QLocale::SundaneseScript 95 Since Qt 5.1
QLocale::SylotiNagriScript 96 Since Qt 5.1
QLocale::SyriacScript 33
QLocale::TagalogScript 97 Since Qt 5.1
QLocale::TagbanwaScript 98 Since Qt 5.1
QLocale::TaiLeScript 99 Since Qt 5.1
QLocale::TaiVietScript 100 Since Qt 5.1
QLocale::TakriScript 101 Since Qt 5.1
QLocale::TamilScript 27
QLocale::TangutScript 139 Since Qt 5.7
QLocale::TeluguScript 28
QLocale::ThaanaScript 29
QLocale::ThaiScript 30
QLocale::TibetanScript 31
QLocale::TifinaghScript 9
QLocale::TirhutaScript 126 Since Qt 5.5
QLocale::TraditionalChineseScript TraditionalHanScript same as TraditionalHanScript
QLocale::TraditionalHanScript 6 same as TraditionalChineseScript
QLocale::UgariticScript 102 Since Qt 5.1
QLocale::VaiScript 35
QLocale::VarangKshitiScript 127 Since Qt 5.5
QLocale::YiScript 34

See also script(), scriptToString(), and languageToString().

Member Function Documentation

QString QLocale::toCurrencyString(float value, const QString &symbol = QString()) const

QString QLocale::toCurrencyString(float i, const QString &symbol, int precision) const

This function overloads toCurrencyString().

QLocale::QLocale(const QLocale &other)

Constructs a QLocale object as a copy of other.

QLocale::QLocale(QLocale::Language language, QLocale::Script script, QLocale::Country country)

Constructs a QLocale object with the specified language, script and country.

  • If the language/script/country is found in the database, it is used.
  • If both script is AnyScript and country is AnyCountry, the language is used with the most appropriate available script and country (for example, Germany for German),
  • If either script is AnyScript or country is AnyCountry, the language is used with the first locale that matches the given script and country.
  • If neither the language nor the country are found, QLocale defaults to the default locale (see setDefault()).

The language, script and country that are actually used can be queried using language(), script() and country().

This function was introduced in Qt 4.8.

See also setDefault(), language(), script(), and country().

QLocale::QLocale(QLocale::Language language, QLocale::Country country = AnyCountry)

Constructs a QLocale object with the specified language and country.

  • If the language/country pair is found in the database, it is used.
  • If the language is found but the country is not, or if the country is AnyCountry, the language is used with the most appropriate available country (for example, Germany for German),
  • If neither the language nor the country are found, QLocale defaults to the default locale (see setDefault()).

The language and country that are actually used can be queried using language() and country().

See also setDefault(), language(), and country().

QLocale::QLocale(const QString &name)

Constructs a QLocale object with the specified name, which has the format "language[_script][_country][.codeset][@modifier]" or "C", where:

  • language is a lowercase, two-letter, ISO 639 language code (also some three-letter codes),
  • script is a titlecase, four-letter, ISO 15924 script code,
  • country is an uppercase, two-letter, ISO 3166 country code (also "419" as defined by United Nations),
  • and codeset and modifier are ignored.

The separator can be either underscore or a minus sign.

If the string violates the locale format, or language is not a valid ISO 639 code, the "C" locale is used instead. If country is not present, or is not a valid ISO 3166 code, the most appropriate country is chosen for the specified language.

The language, script and country codes are converted to their respective Language, Script and Country enums. After this conversion is performed, the constructor behaves exactly like QLocale(Country, Script, Language).

This constructor is much slower than QLocale(Country, Script, Language).

See also bcp47Name().

QLocale::QLocale()

Constructs a QLocale object initialized with the default locale. If no default locale was set using setDefault(), this locale will be the same as the one returned by system().

See also setDefault().

QLocale &QLocale::operator=(const QLocale &other)

Assigns other to this QLocale object and returns a reference to this QLocale object.

QLocale::~QLocale()

Destructor

QString QLocale::amText() const

Returns the localized name of the "AM" suffix for times specified using the conventions of the 12-hour clock.

This function was introduced in Qt 4.5.

See also pmText().

QString QLocale::bcp47Name() const

Returns the dash-separated language, script and country (and possibly other BCP47 fields) of this locale as a string.

Unlike the uiLanguages() the returned value of the bcp47Name() represents the locale name of the QLocale data but not the language the user-interface should be in.

This function tries to conform the locale name to BCP47.

This function was introduced in Qt 4.8.

See also language(), country(), script(), and uiLanguages().

[static] QLocale QLocale::c()

Returns a QLocale object initialized to the "C" locale.

This locale is based on en_US but with various quirks of its own, such as simplified number formatting and its own date formatting. It implements the POSIX standards that describe the behavior of standard library functions of the "C" programming language.

Among other things, this means its collation order is based on the ASCII values of letters, so that (for case-sensitive sorting) all upper-case letters sort before any lower-case one (rather than each letter's upper- and lower-case forms sorting adjacent to one another, before the next letter's two forms).

See also system().

QLocale QLocale::collation() const

Returns the locale to use for collation.

The result is usually this locale; however, the system locale (which is commonly the default locale) will return the system collation locale. The result is suitable for passing to QCollator's constructor.

This function was introduced in Qt 5.13.

See also QCollator.

QLocale::Country QLocale::country() const

Returns the country of this locale.

See also language(), script(), countryToString(), and bcp47Name().

[static] QString QLocale::countryToString(QLocale::Country country)

Returns a QString containing the name of country.

See also languageToString(), scriptToString(), country(), and bcp47Name().

QString QLocale::createSeparatedList(const QStringList &list) const

Returns a string that represents a join of a given list of strings with a separator defined by the locale.

This function was introduced in Qt 4.8.

QString QLocale::currencySymbol(QLocale::CurrencySymbolFormat format = CurrencySymbol) const

Returns a currency symbol according to the format.

This function was introduced in Qt 4.8.

QString QLocale::dateFormat(QLocale::FormatType format = LongFormat) const

Returns the date format used for the current locale.

If format is LongFormat, the format will be elaborate, otherwise it will be short. For example, LongFormat for the en_US locale is dddd, MMMM d, yyyy, ShortFormat is M/d/yy.

This function was introduced in Qt 4.1.

See also QDate::toString() and QDate::fromString().

QString QLocale::dateTimeFormat(QLocale::FormatType format = LongFormat) const

Returns the date time format used for the current locale.

If format is LongFormat, the format will be elaborate, otherwise it will be short. For example, LongFormat for the en_US locale is dddd, MMMM d, yyyy h:mm:ss AP t, ShortFormat is M/d/yy h:mm AP.

This function was introduced in Qt 4.4.

See also QDateTime::toString() and QDateTime::fromString().

QString QLocale::dayName(int day, QLocale::FormatType type = LongFormat) const

Returns the localized name of the day (where 1 represents Monday, 2 represents Tuesday and so on), in the format specified by type.

For example, if the locale is en_US and day is 1, LongFormat will return Monday, ShortFormat Mon, and NarrowFormat M.

This function was introduced in Qt 4.2.

See also monthName() and standaloneDayName().

QChar QLocale::decimalPoint() const

Returns the decimal point character of this locale.

Note: This function shall change to return a QString instead of QChar in Qt6. Callers are encouraged to exploit the QString(QChar) constructor to convert early in preparation for this.

This function was introduced in Qt 4.1.

See also groupSeparator() and toString().

QChar QLocale::exponential() const

Returns the exponential character of this locale, used to separate exponent from mantissa in some floating-point numeric representations.

Note: This function shall change to return a QString instead of QChar in Qt6. Callers are encouraged to exploit the QString(QChar) constructor to convert early in preparation for this.

This function was introduced in Qt 4.1.

See also toString(double, char, int).

Qt::DayOfWeek QLocale::firstDayOfWeek() const

Returns the first day of the week according to the current locale.

This function was introduced in Qt 4.8.

QString QLocale::formattedDataSize(qint64 bytes, int precision = 2, QLocale::DataSizeFormats format = DataSizeIecFormat) const

Converts a size in bytes to a human-readable localized string, comprising a number and a quantified unit. The quantifier is chosen such that the number is at least one, and as small as possible. For example if bytes is 16384, precision is 2, and format is DataSizeIecFormat (the default), this function returns "16.00 KiB"; for 1330409069609 bytes it returns "1.21 GiB"; and so on. If format is DataSizeIecFormat or DataSizeTraditionalFormat, the given number of bytes is divided by a power of 1024, with result less than 1024; for DataSizeSIFormat, it is divided by a power of 1000, with result less than 1000. DataSizeIecFormat uses the new IEC standard quantifiers Ki, Mi and so on, whereas DataSizeSIFormat uses the older SI quantifiers k, M, etc., and DataSizeTraditionalFormat abuses them.

This function was introduced in Qt 5.10.

QChar QLocale::groupSeparator() const

Returns the group separator character of this locale.

Note: This function shall change to return a QString instead of QChar in Qt6. Callers are encouraged to exploit the QString(QChar) constructor to convert early in preparation for this.

This function was introduced in Qt 4.1.

See also decimalPoint() and toString().

QLocale::Language QLocale::language() const

Returns the language of this locale.

See also script(), country(), languageToString(), and bcp47Name().

[static] QString QLocale::languageToString(QLocale::Language language)

Returns a QString containing the name of language.

See also countryToString(), scriptToString(), and bcp47Name().

[static] QList<QLocale> QLocale::matchingLocales(QLocale::Language language, QLocale::Script script, QLocale::Country country)

Returns a list of valid locale objects that match the given language, script and country.

Getting a list of all locales: QList<QLocale> allLocales = QLocale::matchingLocales(QLocale::AnyLanguage, QLocale::AnyScript, QLocale::AnyCountry);

Getting a list of locales suitable for Russia: QList<QLocale> locales = QLocale::matchingLocales(QLocale::AnyLanguage, QLocale::AnyScript, QLocale::Russia);

This function was introduced in Qt 4.8.

QLocale::MeasurementSystem QLocale::measurementSystem() const

Returns the measurement system for the locale.

This function was introduced in Qt 4.4.

QString QLocale::monthName(int month, QLocale::FormatType type = LongFormat) const

Returns the localized name of month, in the format specified by type.

For example, if the locale is en_US and month is 1, LongFormat will return January. ShortFormat Jan, and NarrowFormat J.

This function was introduced in Qt 4.2.

See also dayName() and standaloneMonthName().

QString QLocale::name() const

Returns the language and country of this locale as a string of the form "language_country", where language is a lowercase, two-letter ISO 639 language code, and country is an uppercase, two- or three-letter ISO 3166 country code.

Note that even if QLocale object was constructed with an explicit script, name() will not contain it for compatibility reasons. Use bcp47Name() instead if you need a full locale name.

See also QLocale(), language(), script(), country(), and bcp47Name().

QString QLocale::nativeCountryName() const

Returns a native name of the country for the locale. For example "España" for Spanish/Spain locale.

This function was introduced in Qt 4.8.

See also nativeLanguageName() and countryToString().

QString QLocale::nativeLanguageName() const

Returns a native name of the language for the locale. For example "Schwiizertüütsch" for Swiss-German locale.

This function was introduced in Qt 4.8.

See also nativeCountryName() and languageToString().

QChar QLocale::negativeSign() const

Returns the negative sign character of this locale.

Note: This function shall change to return a QString instead of QChar in Qt6. Callers are encouraged to exploit the QString(QChar) constructor to convert early in preparation for this.

This function was introduced in Qt 4.1.

See also positiveSign() and toString().

QLocale::NumberOptions QLocale::numberOptions() const

Returns the options related to number conversions for this QLocale instance.

By default, no options are set for the standard locales, except for the "C" locale, which has OmitGroupSeparator set by default.

This function was introduced in Qt 4.2.

See also setNumberOptions(), toString(), and groupSeparator().

QChar QLocale::percent() const

Returns the percent character of this locale.

Note: This function shall change to return a QString instead of QChar in Qt6. Callers are encouraged to exploit the QString(QChar) constructor to convert early in preparation for this.

This function was introduced in Qt 4.1.

See also toString().

QString QLocale::pmText() const

Returns the localized name of the "PM" suffix for times specified using the conventions of the 12-hour clock.

This function was introduced in Qt 4.5.

See also amText().

QChar QLocale::positiveSign() const

Returns the positive sign character of this locale.

Note: This function shall change to return a QString instead of QChar in Qt6. Callers are encouraged to exploit the QString(QChar) constructor to convert early in preparation for this.

This function was introduced in Qt 4.5.

See also negativeSign() and toString().

QString QLocale::quoteString(const QString &str, QLocale::QuotationStyle style = StandardQuotation) const

Returns str quoted according to the current locale using the given quotation style.

This function was introduced in Qt 4.8.

QString QLocale::quoteString(const QStringRef &str, QLocale::QuotationStyle style = StandardQuotation) const

This is an overloaded function.

This function was introduced in Qt 4.8.

QLocale::Script QLocale::script() const

Returns the script of this locale.

This function was introduced in Qt 4.8.

See also language(), country(), languageToString(), scriptToString(), and bcp47Name().

[static] QString QLocale::scriptToString(QLocale::Script script)

Returns a QString containing the name of script.

This function was introduced in Qt 4.8.

See also languageToString(), countryToString(), script(), and bcp47Name().

[static] void QLocale::setDefault(const QLocale &locale)

Sets the global default locale to locale. These values are used when a QLocale object is constructed with no arguments. If this function is not called, the system's locale is used.

Warning: In a multithreaded application, the default locale should be set at application startup, before any non-GUI threads are created.

Warning: This function is not reentrant.

See also system() and c().

void QLocale::setNumberOptions(QLocale::NumberOptions options)

Sets the options related to number conversions for this QLocale instance.

This function was introduced in Qt 4.2.

See also numberOptions().

QString QLocale::standaloneDayName(int day, QLocale::FormatType type = LongFormat) const

Returns the localized name of the day (where 1 represents Monday, 2 represents Tuesday and so on) that is used as a standalone text, in the format specified by type.

If the locale information does not specify the standalone day name then return value is the same as in dayName().

This function was introduced in Qt 4.5.

See also dayName() and standaloneMonthName().

QString QLocale::standaloneMonthName(int month, QLocale::FormatType type = LongFormat) const

Returns the localized name of month that is used as a standalone text, in the format specified by type.

If the locale information doesn't specify the standalone month name then return value is the same as in monthName().

This function was introduced in Qt 4.5.

See also monthName() and standaloneDayName().

void QLocale::swap(QLocale &other)

Swaps locale other with this locale. This operation is very fast and never fails.

This function was introduced in Qt 5.6.

[static] QLocale QLocale::system()

Returns a QLocale object initialized to the system locale.

On Windows and Mac, this locale will use the decimal/grouping characters and date/time formats specified in the system configuration panel.

See also c().

Qt::LayoutDirection QLocale::textDirection() const

Returns the text direction of the language.

This function was introduced in Qt 4.7.

QString QLocale::timeFormat(QLocale::FormatType format = LongFormat) const

Returns the time format used for the current locale.

If format is LongFormat, the format will be elaborate, otherwise it will be short. For example, LongFormat for the en_US locale is h:mm:ss AP t, ShortFormat is h:mm AP.

This function was introduced in Qt 4.1.

See also QTime::toString() and QTime::fromString().

QString QLocale::toCurrencyString(qlonglong value, const QString &symbol = QString()) const

Returns a localized string representation of value as a currency. If the symbol is provided it is used instead of the default currency symbol.

This function was introduced in Qt 4.8.

See also currencySymbol().

QString QLocale::toCurrencyString(qulonglong value, const QString &symbol = QString()) const

This is an overloaded function.

This function was introduced in Qt 4.8.

QString QLocale::toCurrencyString(short value, const QString &symbol = QString()) const

This is an overloaded function.

This function was introduced in Qt 4.8.

QString QLocale::toCurrencyString(ushort value, const QString &symbol = QString()) const

This is an overloaded function.

This function was introduced in Qt 4.8.

QString QLocale::toCurrencyString(int value, const QString &symbol = QString()) const

This is an overloaded function.

This function was introduced in Qt 4.8.

QString QLocale::toCurrencyString(uint value, const QString &symbol = QString()) const

This is an overloaded function.

This function was introduced in Qt 4.8.

QString QLocale::toCurrencyString(double value, const QString &symbol = QString()) const

This is an overloaded function.

This function was introduced in Qt 4.8.

QString QLocale::toCurrencyString(double value, const QString &symbol, int precision) const

This function overloads toCurrencyString().

Returns a localized string representation of value as a currency. If the symbol is provided it is used instead of the default currency symbol. If the precision is provided it is used to set the precision of the currency value.

This function was introduced in Qt 5.7.

See also currencySymbol().

QDate QLocale::toDate(const QString &string, QLocale::FormatType format = LongFormat) const

Parses the date string given in string and returns the date. The format of the date string is chosen according to the format parameter (see dateFormat()).

If the date could not be parsed, returns an invalid date.

This function was introduced in Qt 4.4.

See also dateFormat(), toTime(), toDateTime(), and QDate::fromString().

QDate QLocale::toDate(const QString &string, const QString &format) const

Parses the date string given in string and returns the date. See QDate::fromString() for information on the expressions that can be used with this function.

This function searches month names and the names of the days of the week in the current locale.

If the date could not be parsed, returns an invalid date.

This function was introduced in Qt 4.4.

See also dateFormat(), toTime(), toDateTime(), and QDate::fromString().

QDate QLocale::toDate(const QString &string, QLocale::FormatType format, QCalendar cal) const

This is an overloaded function.

This function was introduced in Qt 5.14.

QDate QLocale::toDate(const QString &string, const QString &format, QCalendar cal) const

This is an overloaded function.

This function was introduced in Qt 5.14.

QDateTime QLocale::toDateTime(const QString &string, QLocale::FormatType format = LongFormat) const

Parses the date/time string given in string and returns the time. The format of the date/time string is chosen according to the format parameter (see dateTimeFormat()).

If the string could not be parsed, returns an invalid QDateTime.

This function was introduced in Qt 4.4.

See also dateTimeFormat(), toTime(), toDate(), and QDateTime::fromString().

QDateTime QLocale::toDateTime(const QString &string, const QString &format) const

Parses the date/time string given in string and returns the time. See QDateTime::fromString() for information on the expressions that can be used with this function.

Note: The month and day names used must be given in the user's local language.

If the string could not be parsed, returns an invalid QDateTime.

This function was introduced in Qt 4.4.

See also dateTimeFormat(), toTime(), toDate(), and QDateTime::fromString().

QDateTime QLocale::toDateTime(const QString &string, QLocale::FormatType format, QCalendar cal) const

This is an overloaded function.

This function was introduced in Qt 5.14.

QDateTime QLocale::toDateTime(const QString &string, const QString &format, QCalendar cal) const

This is an overloaded function.

This function was introduced in Qt 5.14.

double QLocale::toDouble(const QString &s, bool *ok = nullptr) const

Returns the double represented by the localized string s.

Returns an infinity if the conversion overflows or 0.0 if the conversion fails for any other reason (e.g. underflow).

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function does not fall back to the 'C' locale if the string cannot be interpreted in this locale.

bool ok;
double d;

QLocale c(QLocale::C);
d = c.toDouble( "1234.56", &ok );  // ok == true, d == 1234.56
d = c.toDouble( "1,234.56", &ok ); // ok == true, d == 1234.56
d = c.toDouble( "1234,56", &ok );  // ok == false

QLocale german(QLocale::German);
d = german.toDouble( "1234,56", &ok );  // ok == true, d == 1234.56
d = german.toDouble( "1.234,56", &ok ); // ok == true, d == 1234.56
d = german.toDouble( "1234.56", &ok );  // ok == false

d = german.toDouble( "1.234", &ok );    // ok == true, d == 1234.0

Notice that the last conversion returns 1234.0, because '.' is the thousands group separator in the German locale.

This function ignores leading and trailing whitespace.

See also toFloat(), toInt(), and toString().

double QLocale::toDouble(const QStringRef &s, bool *ok = nullptr) const

Returns the double represented by the localized string s.

Returns an infinity if the conversion overflows or 0.0 if the conversion fails for any other reason (e.g. underflow).

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function does not fall back to the 'C' locale if the string cannot be interpreted in this locale.

bool ok;
double d;

QLocale c(QLocale::C);
d = c.toDouble( "1234.56", &ok );  // ok == true, d == 1234.56
d = c.toDouble( "1,234.56", &ok ); // ok == true, d == 1234.56
d = c.toDouble( "1234,56", &ok );  // ok == false

QLocale german(QLocale::German);
d = german.toDouble( "1234,56", &ok );  // ok == true, d == 1234.56
d = german.toDouble( "1.234,56", &ok ); // ok == true, d == 1234.56
d = german.toDouble( "1234.56", &ok );  // ok == false

d = german.toDouble( "1.234", &ok );    // ok == true, d == 1234.0

Notice that the last conversion returns 1234.0, because '.' is the thousands group separator in the German locale.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.1.

See also toFloat(), toInt(), and toString().

double QLocale::toDouble(QStringView s, bool *ok = nullptr) const

Returns the double represented by the localized string s.

Returns an infinity if the conversion overflows or 0.0 if the conversion fails for any other reason (e.g. underflow).

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

Unlike QString::toDouble(), this function does not fall back to the "C" locale if the string cannot be interpreted in this locale.

bool ok;
double d;

QLocale c(QLocale::C);
d = c.toDouble(u"1234.56", &ok);  // ok == true, d == 1234.56
d = c.toDouble(u"1,234.56", &ok); // ok == true, d == 1234.56
d = c.toDouble(u"1234,56", &ok);  // ok == false

QLocale german(QLocale::German);
d = german.toDouble(u"1234,56", &ok);  // ok == true, d == 1234.56
d = german.toDouble(u"1.234,56", &ok); // ok == true, d == 1234.56
d = german.toDouble(u"1234.56", &ok);  // ok == false

d = german.toDouble(u"1.234", &ok);    // ok == true, d == 1234.0

Notice that the last conversion returns 1234.0, because '.' is the thousands group separator in the German locale.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.10.

See also toFloat(), toInt(), and toString().

float QLocale::toFloat(const QString &s, bool *ok = nullptr) const

Returns the float represented by the localized string s.

Returns an infinity if the conversion overflows or 0.0 if the conversion fails for any other reason (e.g. underflow).

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function does not fall back to the 'C' locale if the string cannot be interpreted in this locale.

This function ignores leading and trailing whitespace.

See also toDouble(), toInt(), and toString().

float QLocale::toFloat(const QStringRef &s, bool *ok = nullptr) const

Returns the float represented by the localized string s.

Returns an infinity if the conversion overflows or 0.0 if the conversion fails for any other reason (e.g. underflow).

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function does not fall back to the 'C' locale if the string cannot be interpreted in this locale.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.1.

See also toDouble(), toInt(), and toString().

float QLocale::toFloat(QStringView s, bool *ok = nullptr) const

Returns the float represented by the localized string s.

Returns an infinity if the conversion overflows or 0.0 if the conversion fails for any other reason (e.g. underflow).

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.10.

See also toDouble(), toInt(), and toString().

int QLocale::toInt(const QString &s, bool *ok = nullptr) const

Returns the int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

See also toUInt() and toString().

int QLocale::toInt(const QStringRef &s, bool *ok = nullptr) const

Returns the int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.1.

See also toUInt() and toString().

int QLocale::toInt(QStringView s, bool *ok = nullptr) const

Returns the int represented by the localized string s.

If the conversion fails, the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.10.

See also toUInt() and toString().

long QLocale::toLong(const QString &s, bool *ok = nullptr) const

Returns the long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.13.

See also toInt(), toULong(), toDouble(), and toString().

long QLocale::toLong(const QStringRef &s, bool *ok = nullptr) const

Returns the long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.13.

See also toInt(), toULong(), toDouble(), and toString().

long QLocale::toLong(QStringView s, bool *ok = nullptr) const

Returns the long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.13.

See also toInt(), toULong(), toDouble(), and toString().

qlonglong QLocale::toLongLong(const QString &s, bool *ok = nullptr) const

Returns the long long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

See also toInt(), toULongLong(), toDouble(), and toString().

qlonglong QLocale::toLongLong(const QStringRef &s, bool *ok = nullptr) const

Returns the long long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.1.

See also toInt(), toULongLong(), toDouble(), and toString().

qlonglong QLocale::toLongLong(QStringView s, bool *ok = nullptr) const

Returns the long long int represented by the localized string s.

If the conversion fails, the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.10.

See also toInt(), toULongLong(), toDouble(), and toString().

QString QLocale::toLower(const QString &str) const

Returns a lowercase copy of str.

If Qt Core is using the ICU libraries, they will be used to perform the transformation according to the rules of the current locale. Otherwise the conversion may be done in a platform-dependent manner, with QString::toLower() as a generic fallback.

This function was introduced in Qt 4.8.

See also QString::toLower().

short QLocale::toShort(const QString &s, bool *ok = nullptr) const

Returns the short int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

See also toUShort() and toString().

short QLocale::toShort(const QStringRef &s, bool *ok = nullptr) const

Returns the short int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.1.

See also toUShort() and toString().

short QLocale::toShort(QStringView s, bool *ok = nullptr) const

Returns the short int represented by the localized string s.

If the conversion fails, the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.10.

See also toUShort() and toString().

QString QLocale::toString(qlonglong i) const

Returns a localized string representation of i.

See also toLongLong(), numberOptions(), zeroDigit(), and positiveSign().

QString QLocale::toString(qulonglong i) const

This is an overloaded function.

See also toULongLong(), numberOptions(), zeroDigit(), and positiveSign().

QString QLocale::toString(long i) const

This is an overloaded function.

See also toLong().

QString QLocale::toString(ulong i) const

This is an overloaded function.

See also toULong().

QString QLocale::toString(short i) const

This is an overloaded function.

See also toShort().

QString QLocale::toString(ushort i) const

This is an overloaded function.

See also toUShort().

QString QLocale::toString(int i) const

This is an overloaded function.

See also toInt().

QString QLocale::toString(uint i) const

This is an overloaded function.

See also toUInt().

QString QLocale::toString(double i, char f = 'g', int prec = 6) const

This is an overloaded function.

f and prec have the same meaning as in QString::number(double, char, int).

See also toDouble(), numberOptions(), exponential(), decimalPoint(), zeroDigit(), positiveSign(), and percent().

QString QLocale::toString(float i, char f = 'g', int prec = 6) const

This is an overloaded function.

f and prec have the same meaning as in QString::number(double, char, int).

See also toDouble().

QString QLocale::toString(const QDate &date, const QString &format) const

Returns a localized string representation of the given date in the specified format. If format is an empty string, an empty string is returned.

See also QDate::toString().

QString QLocale::toString(const QTime &time, const QString &format) const

Returns a localized string representation of the given time according to the specified format. If format is an empty string, an empty string is returned.

See also QTime::toString().

QString QLocale::toString(const QDateTime &dateTime, const QString &format) const

Returns a localized string representation of the given dateTime according to the specified format. If format is an empty string, an empty string is returned.

This function was introduced in Qt 4.4.

See also QDateTime::toString(), QDate::toString(), and QTime::toString().

QString QLocale::toString(const QDate &date, QStringView format) const

Returns a localized string representation of the given date in the specified format. If format is an empty string, an empty string is returned.

This function was introduced in Qt 5.10.

See also QDate::toString().

QString QLocale::toString(const QTime &time, QStringView format) const

Returns a localized string representation of the given time according to the specified format. If format is an empty string, an empty string is returned.

This function was introduced in Qt 5.10.

See also QTime::toString().

QString QLocale::toString(const QDateTime &dateTime, QStringView format) const

Returns a localized string representation of the given dateTime according to the specified format. If format is an empty string, an empty string is returned.

This function was introduced in Qt 5.10.

See also QDateTime::toString(), QDate::toString(), and QTime::toString().

QString QLocale::toString(const QDate &date, QLocale::FormatType format = LongFormat) const

Returns a localized string representation of the given date according to the specified format (see dateFormat()).

Note: Some locales may use formats that limit the range of years they can represent.

QString QLocale::toString(const QTime &time, QLocale::FormatType format = LongFormat) const

Returns a localized string representation of the given time in the specified format (see timeFormat()).

QString QLocale::toString(const QDateTime &dateTime, QLocale::FormatType format = LongFormat) const

Returns a localized string representation of the given dateTime according to the specified format (see dateTimeFormat()).

Note: Some locales may use formats that limit the range of years they can represent.

This function was introduced in Qt 4.4.

QTime QLocale::toTime(const QString &string, QLocale::FormatType format = LongFormat) const

Parses the time string given in string and returns the time. The format of the time string is chosen according to the format parameter (see timeFormat()).

If the time could not be parsed, returns an invalid time.

This function was introduced in Qt 4.4.

See also timeFormat(), toDate(), toDateTime(), and QTime::fromString().

QTime QLocale::toTime(const QString &string, const QString &format) const

Parses the time string given in string and returns the time. See QTime::fromString() for information on what is a valid format string.

If the time could not be parsed, returns an invalid time.

This function was introduced in Qt 4.4.

See also timeFormat(), toDate(), toDateTime(), and QTime::fromString().

uint QLocale::toUInt(const QString &s, bool *ok = nullptr) const

Returns the unsigned int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

See also toInt() and toString().

uint QLocale::toUInt(const QStringRef &s, bool *ok = nullptr) const

Returns the unsigned int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.1.

See also toInt() and toString().

uint QLocale::toUInt(QStringView s, bool *ok = nullptr) const

Returns the unsigned int represented by the localized string s.

If the conversion fails, the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.10.

See also toInt() and toString().

ulong QLocale::toULong(const QString &s, bool *ok = nullptr) const

Returns the unsigned long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.13.

See also toLong(), toInt(), toDouble(), and toString().

ulong QLocale::toULong(const QStringRef &s, bool *ok = nullptr) const

Returns the unsigned long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.13.

See also toLong(), toInt(), toDouble(), and toString().

ulong QLocale::toULong(QStringView s, bool *ok = nullptr) const

Returns the unsigned long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.13.

See also toLong(), toInt(), toDouble(), and toString().

qulonglong QLocale::toULongLong(const QString &s, bool *ok = nullptr) const

Returns the unsigned long long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

See also toLongLong(), toInt(), toDouble(), and toString().

qulonglong QLocale::toULongLong(const QStringRef &s, bool *ok = nullptr) const

Returns the unsigned long long int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.1.

See also toLongLong(), toInt(), toDouble(), and toString().

qulonglong QLocale::toULongLong(QStringView s, bool *ok = nullptr) const

Returns the unsigned long long int represented by the localized string s.

If the conversion fails, the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.10.

See also toLongLong(), toInt(), toDouble(), and toString().

ushort QLocale::toUShort(const QString &s, bool *ok = nullptr) const

Returns the unsigned short int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

See also toShort() and toString().

ushort QLocale::toUShort(const QStringRef &s, bool *ok = nullptr) const

Returns the unsigned short int represented by the localized string s.

If the conversion fails the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.1.

See also toShort() and toString().

ushort QLocale::toUShort(QStringView s, bool *ok = nullptr) const

Returns the unsigned short int represented by the localized string s.

If the conversion fails, the function returns 0.

If ok is not nullptr, failure is reported by setting *ok to false, and success by setting *ok to true.

This function ignores leading and trailing whitespace.

This function was introduced in Qt 5.10.

See also toShort() and toString().

QString QLocale::toUpper(const QString &str) const

Returns an uppercase copy of str.

If Qt Core is using the ICU libraries, they will be used to perform the transformation according to the rules of the current locale. Otherwise the conversion may be done in a platform-dependent manner, with QString::toUpper() as a generic fallback.

This function was introduced in Qt 4.8.

See also QString::toUpper().

QStringList QLocale::uiLanguages() const

Returns an ordered list of locale names for translation purposes in preference order (like "en-Latn-US", "en-US", "en").

The return value represents locale names that the user expects to see the UI translation in.

Most like you do not need to use this function directly, but just pass the QLocale object to the QTranslator::load() function.

The first item in the list is the most preferred one.

This function was introduced in Qt 4.8.

See also QTranslator and bcp47Name().

QList<Qt::DayOfWeek> QLocale::weekdays() const

Returns a list of days that are considered weekdays according to the current locale.

This function was introduced in Qt 4.8.

QChar QLocale::zeroDigit() const

Returns the zero digit character of this locale.

Note: This function shall change to return a QString instead of QChar in Qt6. Callers are encouraged to exploit the QString(QChar) constructor to convert early in preparation for this.

This function was introduced in Qt 4.1.

See also toString().

bool QLocale::operator!=(const QLocale &other) const

Returns true if the QLocale object is not the same as the other locale specified; otherwise returns false.

bool QLocale::operator==(const QLocale &other) const

Returns true if the QLocale object is the same as the other locale specified; otherwise returns false.

Related Non-Members

uint qHash(const QLocale &key, uint seed = 0)

Returns the hash value for key, using seed to seed the calculation.

This function was introduced in Qt 5.6.

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Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-5.15/qlocale.html