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Eneboo - Documentación para desarrolladores
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Eneboo - Documentación para desarrolladores
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The QChar class provides a lightweight Unicode character. Más...
#include <qstring.h>
The QChar class provides a lightweight Unicode character.
Unicode characters are (so far) 16-bit entities without any markup or structure. This class represents such an entity. It is lightweight, so it can be used everywhere. Most compilers treat it like a "short int". (In a few years it may be necessary to make QChar 32-bit when more than 65536 Unicode code points have been defined and come into use.)
QChar provides a full complement of testing/classification functions, converting to and from other formats, converting from composed to decomposed Unicode, and trying to compare and case-convert if you ask it to.
The classification functions include functions like those in ctype.h, but operating on the full range of Unicode characters. They all return TRUE if the character is a certain type of character; otherwise they return FALSE. These classification functions are isNull() (returns TRUE if the character is U+0000), isPrint() (TRUE if the character is any sort of printable character, including whitespace), isPunct() (any sort of punctation), isMark() (Unicode Mark), isLetter (a letter), isNumber() (any sort of numeric character), isLetterOrNumber(), and isDigit() (decimal digits). All of these are wrappers around category() which return the Unicode-defined category of each character.
QChar further provides direction(), which indicates the "natural" writing direction of this character. The joining() function indicates how the character joins with its neighbors (needed mostly for Arabic) and finally mirrored(), which indicates whether the character needs to be mirrored when it is printed in its "unnatural" writing direction.
Composed Unicode characters (like å) can be converted to decomposed Unicode ("a" followed by "ring above") by using decomposition().
In Unicode, comparison is not necessarily possible and case conversion is very difficult at best. Unicode, covering the "entire" world, also includes most of the world's case and sorting problems. Qt tries, but not very hard: operator==() and friends will do comparison based purely on the numeric Unicode value (code point) of the characters, and upper() and lower() will do case changes when the character has a well-defined upper/lower-case equivalent. There is no provision for locale-dependent case folding rules or comparison; these functions are meant to be fast so they can be used unambiguously in data structures. (See QString::localeAwareCompare() though.)
The conversion functions include unicode() (to a scalar), latin1() (to scalar, but converts all non-Latin-1 characters to 0), row() (gives the Unicode row), cell() (gives the Unicode cell), digitValue() (gives the integer value of any of the numerous digit characters), and a host of constructors.
More information can be found in the document About Unicode.
| enum QChar::Category |
This enum maps the Unicode character categories.
The following characters are normative in Unicode:
Mark_NonSpacing Unicode class name Mn
Mark_SpacingCombining Unicode class name Mc
Mark_Enclosing Unicode class name Me
Number_DecimalDigit Unicode class name Nd
Number_Letter Unicode class name Nl
Number_Other Unicode class name No
Separator_Space Unicode class name Zs
Separator_Line Unicode class name Zl
Separator_Paragraph Unicode class name Zp
Other_Control Unicode class name Cc
Other_Format Unicode class name Cf
Other_Surrogate Unicode class name Cs
Other_PrivateUse Unicode class name Co
Other_NotAssigned Unicode class name Cn
The following categories are informative in Unicode:
Letter_Uppercase Unicode class name Lu
Letter_Lowercase Unicode class name Ll
Letter_Titlecase Unicode class name Lt
Letter_Modifier Unicode class name Lm
Letter_Other Unicode class name Lo
Punctuation_Connector Unicode class name Pc
Punctuation_Dash Unicode class name Pd
Punctuation_Open Unicode class name Ps
Punctuation_Close Unicode class name Pe
Punctuation_InitialQuote Unicode class name Pi
Punctuation_FinalQuote Unicode class name Pf
Punctuation_Other Unicode class name Po
Symbol_Math Unicode class name Sm
Symbol_Currency Unicode class name Sc
Symbol_Modifier Unicode class name Sk
Symbol_Other Unicode class name So
There are two categories that are specific to Qt:
NoCategory used when Qt is dazed and confused and cannot make sense of anything.
Punctuation_Dask old typo alias for Punctuation_Dash
| enum QChar::Category |
This enum type defines names for some of the Unicode combining classes. See the Unicode Standard for a description of the values.
| enum QChar::Decomposition |
| enum QChar::Decomposition |
This enum type defines the Unicode decomposition attributes. See the Unicode Standard for a description of the values.
| enum QChar::Direction |
| enum QChar::Direction |
This enum type defines the Unicode direction attributes. See the Unicode Standard for a description of the values.
In order to conform to C/C++ naming conventions "Dir" is prepended to the codes used in the Unicode Standard.
| enum QChar::Joining |
This enum type defines the Unicode joining attributes. See the Unicode Standard for a description of the values.
| enum QChar::Joining |
| QChar::QChar | ( | char | c | ) | [inline] |
Constructs a QChar corresponding to ASCII/Latin-1 character c.
| QChar::QChar | ( | const QChar & | c | ) | [inline] |
Constructs a copy of c. This is a deep copy, if such a lightweight object can be said to have deep copies.
| QChar::QChar | ( | short | rc | ) | [inline] |
Constructs a QChar for the character with Unicode code point rc.
| QChar::QChar | ( | ) |
| QChar::QChar | ( | char | c | ) |
| QChar::QChar | ( | uchar | c | ) |
| QChar::QChar | ( | const QChar & | c | ) |
| QChar::QChar | ( | ushort | rc | ) |
| QChar::QChar | ( | short | rc | ) |
| QChar::QChar | ( | uint | rc | ) |
| QChar::QChar | ( | int | rc | ) |
| QChar::Category QChar::category | ( | ) | const |
Returns the character category.
| Category QChar::category | ( | ) | const |
| uchar QChar::cell | ( | ) | const [inline] |
Returns the cell (least significant byte) of the Unicode character.
| uchar QChar::cell | ( | ) | const [inline] |
| unsigned char QChar::combiningClass | ( | ) | const |
Returns the combining class for the character as defined in the Unicode standard. This is mainly useful as a positioning hint for marks attached to a base character.
The Qt text rendering engine uses this information to correctly position non spacing marks around a base character.
| unsigned char QChar::combiningClass | ( | ) | const |
| const QString& QChar::decomposition | ( | ) | const |
| const QString & QChar::decomposition | ( | ) | const |
Decomposes a character into its parts. Returns QString::null if no decomposition exists.
| Decomposition QChar::decompositionTag | ( | ) | const |
| QChar::Decomposition QChar::decompositionTag | ( | ) | const |
Returns the tag defining the composition of the character. Returns QChar::Single if no decomposition exists.
| int QChar::digitValue | ( | ) | const |
Returns the numeric value of the digit, or -1 if the character is not a digit.
| int QChar::digitValue | ( | ) | const |
| Direction QChar::direction | ( | ) | const |
| QChar::Direction QChar::direction | ( | ) | const |
Returns the character's direction.
| bool QChar::isDigit | ( | ) | const |
Returns TRUE if the character is a decimal digit (Number_DecimalDigit); otherwise returns FALSE.
| bool QChar::isDigit | ( | ) | const |
| bool QChar::isLetter | ( | ) | const |
Returns TRUE if the character is a letter (Letter_* categories); otherwise returns FALSE.
| bool QChar::isLetter | ( | ) | const |
| bool QChar::isLetterOrNumber | ( | ) | const |
Returns TRUE if the character is a letter or number (Letter_* or Number_* categories); otherwise returns FALSE.
| bool QChar::isLetterOrNumber | ( | ) | const |
| bool QChar::isMark | ( | ) | const |
Returns TRUE if the character is a mark (Mark_* categories); otherwise returns FALSE.
| bool QChar::isMark | ( | ) | const |
| bool QChar::isNull | ( | ) | const [inline] |
Returns TRUE if the character is the Unicode character 0x0000 (ASCII NUL); otherwise returns FALSE.
| bool QChar::isNull | ( | ) | const [inline] |
| bool QChar::isNumber | ( | ) | const |
Returns TRUE if the character is a number (of any sort - Number_* categories); otherwise returns FALSE.
| bool QChar::isNumber | ( | ) | const |
| bool QChar::isPrint | ( | ) | const |
Returns TRUE if the character is a printable character; otherwise returns FALSE. This is any character not of category Cc or Cn.
Note that this gives no indication of whether the character is available in a particular font.
| bool QChar::isPrint | ( | ) | const |
| bool QChar::isPunct | ( | ) | const |
| bool QChar::isPunct | ( | ) | const |
Returns TRUE if the character is a punctuation mark (Punctuation_* categories); otherwise returns FALSE.
| bool QChar::isSpace | ( | ) | const |
Returns TRUE if the character is a separator character (Separator_* categories); otherwise returns FALSE.
| bool QChar::isSpace | ( | ) | const |
| bool QChar::isSymbol | ( | ) | const |
| bool QChar::isSymbol | ( | ) | const |
Returns TRUE if the character is a symbol (Symbol_* categories); otherwise returns FALSE.
| Joining QChar::joining | ( | ) | const |
| QChar::Joining QChar::joining | ( | ) | const |
Returns information about the joining properties of the character (needed for example, for Arabic).
| char QChar::latin1 | ( | ) | const [inline] |
| char QChar::latin1 | ( | ) | const [inline] |
Returns the Latin-1 value of this character, or 0 if it cannot be represented in Latin-1.
| QChar QChar::lower | ( | ) | const |
| QChar QChar::lower | ( | ) | const |
Returns the lowercase equivalent if the character is uppercase; otherwise returns the character itself.
| bool QChar::mirrored | ( | ) | const |
| bool QChar::mirrored | ( | ) | const |
Returns TRUE if the character is a mirrored character (one that should be reversed if the text direction is reversed); otherwise returns FALSE.
| QChar QChar::mirroredChar | ( | ) | const |
Returns the mirrored character if this character is a mirrored character, otherwise returns the character itself.
| QChar QChar::mirroredChar | ( | ) | const |
| bool QChar::networkOrdered | ( | ) | [inline, static] |
Returns TRUE if this character is in network byte order (MSB first); otherwise returns FALSE. This is platform dependent.
| static bool QChar::networkOrdered | ( | ) | [inline, static] |
| QChar::operator char | ( | ) | const [inline] |
| QChar::operator char | ( | ) | const [inline] |
| uchar QChar::row | ( | ) | const [inline] |
Returns the row (most significant byte) of the Unicode character.
| uchar QChar::row | ( | ) | const [inline] |
| void QChar::setCell | ( | uchar | cell | ) | [inline] |
| void QChar::setCell | ( | uchar | cell | ) | [inline] |
| void QChar::setRow | ( | uchar | row | ) | [inline] |
| void QChar::setRow | ( | uchar | row | ) | [inline] |
| ushort& QChar::unicode | ( | ) | [inline] |
| ushort & QChar::unicode | ( | ) | [inline] |
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta. Returns a reference to the numeric Unicode value equal to the QChar.
| ushort QChar::unicode | ( | ) | const [inline] |
| ushort QChar::unicode | ( | ) | const [inline] |
| QChar QChar::upper | ( | ) | const |
| QChar QChar::upper | ( | ) | const |
Returns the uppercase equivalent if the character is lowercase; otherwise returns the character itself.
Returns TRUE if c1 and c2 are not the same Unicode character; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if c is not the ASCII/Latin-1 character ch; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if c is not the ASCII/Latin-1 character ch; otherwise returns FALSE.
Returns TRUE if the numeric Unicode value of c1 is less than that of c2; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if the numeric Unicode value of c is less than that of the ASCII/Latin-1 character ch; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if the numeric Unicode value of the ASCII/Latin-1 character ch is less than that of c; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if the numeric Unicode value of the ASCII/Latin-1 character ch is less than or equal to that of c; otherwise returns FALSE.
Returns TRUE if the numeric Unicode value of c1 is less than that of c2, or they are the same Unicode character; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if the numeric Unicode value of c is less than or equal to that of the ASCII/Latin-1 character ch; otherwise returns FALSE.
Returns TRUE if c1 and c2 are the same Unicode character; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if c is the ASCII/Latin-1 character ch; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if c is the ASCII/Latin-1 character ch; otherwise returns FALSE.
Returns TRUE if the numeric Unicode value of c1 is greater than that of c2; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if the numeric Unicode value of the ASCII/Latin-1 character ch is greater than that of c; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if the numeric Unicode value of c is greater than that of the ASCII/Latin-1 character ch; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if the numeric Unicode value of c is greater than or equal to that of the ASCII/Latin-1 character ch; otherwise returns FALSE.
Returns TRUE if the numeric Unicode value of c1 is greater than that of c2, or they are the same Unicode character; otherwise returns FALSE.
Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.
Returns TRUE if the numeric Unicode value of the ASCII/Latin-1 character ch is greater than or equal to that of c; otherwise returns FALSE.
| QT_STATIC_CONST QChar QChar::byteOrderMark |
| QT_STATIC_CONST QChar QChar::byteOrderSwapped |
| QT_STATIC_CONST QChar QChar::nbsp |
| QT_STATIC_CONST QChar QChar::null |
| QT_STATIC_CONST QChar QChar::replacement |
1.7.4
