diff options
Diffstat (limited to 'doc/src/snippets/qstring/main.cpp')
| -rw-r--r-- | doc/src/snippets/qstring/main.cpp | 382 |
1 files changed, 191 insertions, 191 deletions
diff --git a/doc/src/snippets/qstring/main.cpp b/doc/src/snippets/qstring/main.cpp index 9aac79d..bbc9e98 100644 --- a/doc/src/snippets/qstring/main.cpp +++ b/doc/src/snippets/qstring/main.cpp @@ -126,22 +126,22 @@ Widget::Widget(QWidget *parent) void Widget::constCharPointer() { -//! [0] + //! [0] QString str = "Hello"; -//! [0] + //! [0] } void Widget::constCharArray() { -//! [1] + //! [1] static const QChar data[4] = { 0x0055, 0x006e, 0x10e3, 0x03a3 }; QString str(data, 4); -//! [1] + //! [1] } void Widget::characterReference() { -//! [2] + //! [2] QString str; str.resize(4); @@ -149,46 +149,46 @@ void Widget::characterReference() str[1] = QChar('n'); str[2] = QChar(0x10e3); str[3] = QChar(0x03a3); -//! [2] + //! [2] } void Widget::atFunction() { -//! [3] + //! [3] QString str; for (int i = 0; i < str.size(); ++i) { if (str.at(i) >= QChar('a') && str.at(i) <= QChar('f')) qDebug() << "Found character in range [a-f]"; } -//! [3] + //! [3] } void Widget::stringLiteral() { -//! [4] + //! [4] QString str; if (str == "auto" || str == "extern" || str == "static" || str == "register") { // ... } -//! [4] + //! [4] } void Widget::modify() { -//! [5] + //! [5] QString str = "and"; str.prepend("rock "); // str == "rock and" str.append(" roll"); // str == "rock and roll" str.replace(5, 3, "&"); // str == "rock & roll" -//! [5] + //! [5] } void Widget::index() { -//! [6] + //! [6] QString str = "We must be <b>bold</b>, very <b>bold</b>"; int j = 0; @@ -196,25 +196,25 @@ void Widget::index() qDebug() << "Found <b> tag at index position" << j; ++j; } -//! [6] + //! [6] } //! [7] - QString Widget::boolToString(bool b) - { - QString result; - if (b) - result = "True"; - else - result = "False"; - return result; - } +QString Widget::boolToString(bool b) +{ + QString result; + if (b) + result = "True"; + else + result = "False"; + return result; +} //! [7] void Widget::nullVsEmpty() { -//! [8] + //! [8] QString().isNull(); // returns true QString().isEmpty(); // returns true @@ -223,45 +223,45 @@ void Widget::nullVsEmpty() QString("abc").isNull(); // returns false QString("abc").isEmpty(); // returns false -//! [8] + //! [8] } void Widget::appendFunction() { -//! [9] + //! [9] QString x = "free"; QString y = "dom"; x.append(y); // x == "freedom" -//! [9] + //! [9] -//! [10] + //! [10] x.insert(x.size(), y); -//! [10] + //! [10] } void Widget::argFunction() { -//! [11] + //! [11] QString i; // current file's number QString total; // number of files to process QString fileName; // current file's name QString status = QString("Processing file %1 of %2: %3") .arg(i).arg(total).arg(fileName); -//! [11] + //! [11] -//! [12] //! [13] + //! [12] //! [13] QString str; -//! [12] + //! [12] str = "%1 %2"; str.arg("%1f", "Hello"); // returns "%1f Hello" str.arg("%1f").arg("Hello"); // returns "Hellof %2" -//! [13] + //! [13] -//! [14] + //! [14] str = QString("Decimal 63 is %1 in hexadecimal") .arg(63, 0, 16); // str == "Decimal 63 is 3f in hexadecimal" @@ -272,16 +272,16 @@ void Widget::argFunction() .arg(12345) .arg(12345, 0, 16); // str == "12345 12,345 3039" -//! [14] + //! [14] } void Widget::chopFunction() { -//! [15] + //! [15] QString str("LOGOUT\r\n"); str.chop(2); // str == "LOGOUT" -//! [15] + //! [15] } void Widget::compareFunction() @@ -293,251 +293,251 @@ void Widget::compareFunction() void Widget::compareSensitiveFunction() { -//! [16] + //! [16] int x = QString::compare("aUtO", "AuTo", Qt::CaseInsensitive); // x == 0 int y = QString::compare("auto", "Car", Qt::CaseSensitive); // y > 0 int z = QString::compare("auto", "Car", Qt::CaseInsensitive); // z < 0 -//! [16] + //! [16] } void Widget::containsFunction() { -//! [17] + //! [17] QString str = "Peter Pan"; str.contains("peter", Qt::CaseInsensitive); // returns true -//! [17] + //! [17] } void Widget::countFunction() { -//! [18] + //! [18] QString str = "banana and panama"; str.count(QRegExp("a[nm]a")); // returns 4 -//! [18] + //! [18] } void Widget::dataFunction() { -//! [19] + //! [19] QString str = "Hello world"; QChar *data = str.data(); while (!data->isNull()) { qDebug() << data->unicode(); ++data; } -//! [19] + //! [19] } void Widget::endsWithFunction() { -//! [20] + //! [20] QString str = "Bananas"; str.endsWith("anas"); // returns true str.endsWith("pple"); // returns false -//! [20] + //! [20] } void Widget::fillFunction() { -//! [21] + //! [21] QString str = "Berlin"; str.fill('z'); // str == "zzzzzz" str.fill('A', 2); // str == "AA" -//! [21] + //! [21] } void Widget::fromRawDataFunction() { -//! [22] - QRegExp pattern; - static const QChar unicode[] = { - 0x005A, 0x007F, 0x00A4, 0x0060, - 0x1009, 0x0020, 0x0020}; - int size = sizeof(unicode) / sizeof(QChar); + //! [22] + QRegExp pattern; + static const QChar unicode[] = { + 0x005A, 0x007F, 0x00A4, 0x0060, + 0x1009, 0x0020, 0x0020}; + int size = sizeof(unicode) / sizeof(QChar); - QString str = QString::fromRawData(unicode, size); - if (str.contains(QRegExp(pattern))) { - // ... -//! [22] //! [23] - } -//! [23] + QString str = QString::fromRawData(unicode, size); + if (str.contains(QRegExp(pattern))) { + // ... + //! [22] //! [23] + } + //! [23] } void Widget::indexOfFunction() { -//! [24] + //! [24] QString x = "sticky question"; QString y = "sti"; x.indexOf(y); // returns 0 x.indexOf(y, 1); // returns 10 x.indexOf(y, 10); // returns 10 x.indexOf(y, 11); // returns -1 -//! [24] + //! [24] } void Widget::firstIndexOfFunction() { -//! [25] + //! [25] QString str = "the minimum"; str.indexOf(QRegExp("m[aeiou]"), 0); // returns 4 -//! [25] + //! [25] } void Widget::insertFunction() { -//! [26] + //! [26] QString str = "Meal"; str.insert(1, QString("ontr")); // str == "Montreal" -//! [26] + //! [26] } void Widget::isEmptyFunction() { -//! [27] + //! [27] QString().isEmpty(); // returns true QString("").isEmpty(); // returns true QString("x").isEmpty(); // returns false QString("abc").isEmpty(); // returns false -//! [27] + //! [27] } void Widget::isNullFunction() { -//! [28] + //! [28] QString().isNull(); // returns true QString("").isNull(); // returns false QString("abc").isNull(); // returns false -//! [28] + //! [28] } void Widget::lastIndexOfFunction() { -//! [29] + //! [29] QString x = "crazy azimuths"; QString y = "az"; x.lastIndexOf(y); // returns 6 x.lastIndexOf(y, 6); // returns 6 x.lastIndexOf(y, 5); // returns 2 x.lastIndexOf(y, 1); // returns -1 -//! [29] + //! [29] -//! [30] + //! [30] QString str = "the minimum"; str.lastIndexOf(QRegExp("m[aeiou]")); // returns 8 -//! [30] + //! [30] } void Widget::leftFunction() { -//! [31] + //! [31] QString x = "Pineapple"; QString y = x.left(4); // y == "Pine" -//! [31] + //! [31] } void Widget::leftJustifiedFunction() { -//! [32] + //! [32] QString s = "apple"; QString t = s.leftJustified(8, '.'); // t == "apple..." -//! [32] + //! [32] -//! [33] + //! [33] QString str = "Pineapple"; str = str.leftJustified(5, '.', true); // str == "Pinea" -//! [33] + //! [33] } void Widget::midFunction() { -//! [34] + //! [34] QString x = "Nine pineapples"; QString y = x.mid(5, 4); // y == "pine" QString z = x.mid(5); // z == "pineapples" -//! [34] + //! [34] } void Widget::numberFunction() { -//! [35] + //! [35] long a = 63; QString s = QString::number(a, 16); // s == "3f" QString t = QString::number(a, 16).toUpper(); // t == "3F" -//! [35] + //! [35] } void Widget::prependFunction() { -//! [36] + //! [36] QString x = "ship"; QString y = "air"; x.prepend(y); // x == "airship" -//! [36] + //! [36] } void Widget::removeFunction() { -//! [37] + //! [37] QString s = "Montreal"; s.remove(1, 4); // s == "Meal" -//! [37] + //! [37] -//! [38] + //! [38] QString t = "Ali Baba"; t.remove(QChar('a'), Qt::CaseInsensitive); // t == "li Bb" -//! [38] + //! [38] -//! [39] + //! [39] QString r = "Telephone"; r.remove(QRegExp("[aeiou].")); // r == "The" -//! [39] + //! [39] } void Widget::replaceFunction() { -//! [40] + //! [40] QString x = "Say yes!"; QString y = "no"; x.replace(4, 3, y); // x == "Say no!" -//! [40] + //! [40] -//! [41] + //! [41] QString str = "colour behaviour flavour neighbour"; str.replace(QString("ou"), QString("o")); // str == "color behavior flavor neighbor" -//! [41] + //! [41] -//! [42] + //! [42] QString s = "Banana"; s.replace(QRegExp("a[mn]"), "ox"); // s == "Boxoxa" -//! [42] + //! [42] -//! [43] + //! [43] QString t = "A <i>bon mot</i>."; t.replace(QRegExp("<i>([^<]*)</i>"), "\\emph{\\1}"); // t == "A \\emph{bon mot}." -//! [43] + //! [43] -//! [86] + //! [86] QString equis = "xxxxxx"; equis.replace("xx", "x"); // equis == "xxx" -//! [86] + //! [86] } void Widget::reserveFunction() { -//! [44] + //! [44] QString result; int maxSize; bool condition; @@ -549,59 +549,59 @@ void Widget::reserveFunction() result.append(nextChar); result.squeeze(); -//! [44] + //! [44] } void Widget::resizeFunction() { -//! [45] + //! [45] QString s = "Hello world"; s.resize(5); // s == "Hello" s.resize(8); // s == "Hello???" (where ? stands for any character) -//! [45] + //! [45] -//! [46] + //! [46] QString t = "Hello"; t += QString(10, 'X'); // t == "HelloXXXXXXXXXX" -//! [46] + //! [46] -//! [47] + //! [47] QString r = "Hello"; r = r.leftJustified(10, ' '); // r == "Hello " -//! [47] + //! [47] } void Widget::rightFunction() { -//! [48] + //! [48] QString x = "Pineapple"; QString y = x.right(5); // y == "apple" -//! [48] + //! [48] } void Widget::rightJustifiedFunction() { -//! [49] + //! [49] QString s = "apple"; QString t = s.rightJustified(8, '.'); // t == "...apple" -//! [49] + //! [49] -//! [50] + //! [50] QString str = "Pineapple"; str = str.rightJustified(5, '.', true); // str == "Pinea" -//! [50] + //! [50] } void Widget::sectionFunction() { -//! [51] //! [52] + //! [51] //! [52] QString str; -//! [51] + //! [51] QString csv = "forename,middlename,surname,phone"; QString path = "/usr/local/bin/myapp"; // First field is empty QString::SectionFlag flag = QString::SectionSkipEmpty; @@ -610,83 +610,83 @@ void Widget::sectionFunction() str = csv.section(',', 2, 2); // str == "surname" str = path.section('/', 3, 4); // str == "bin/myapp" str = path.section('/', 3, 3, flag); // str == "myapp" -//! [52] + //! [52] -//! [53] + //! [53] str = csv.section(',', -3, -2); // str == "middlename,surname" str = path.section('/', -1); // str == "myapp" -//! [53] + //! [53] -//! [54] + //! [54] QString data = "forename**middlename**surname**phone"; str = data.section("**", 2, 2); // str == "surname" str = data.section("**", -3, -2); // str == "middlename**surname" -//! [54] + //! [54] -//! [55] + //! [55] QString line = "forename\tmiddlename surname \t \t phone"; QRegExp sep("\\s+"); str = line.section(sep, 2, 2); // s == "surname" str = line.section(sep, -3, -2); // s == "middlename surname" -//! [55] + //! [55] } void Widget::setNumFunction() { -//! [56] + //! [56] QString str; str.setNum(1234); // str == "1234" -//! [56] + //! [56] } void Widget::simplifiedFunction() { -//! [57] + //! [57] QString str = " lots\t of\nwhitespace\r\n "; str = str.simplified(); // str == "lots of whitespace"; -//! [57] + //! [57] } void Widget::sizeFunction() { -//! [58] + //! [58] QString str = "World"; int n = str.size(); // n == 5 str.data()[0]; // returns 'W' str.data()[4]; // returns 'd' str.data()[5]; // returns '\0' -//! [58] + //! [58] } void Widget::splitFunction() { -//! [59] + //! [59] QString str; QStringList list; str = "Some text\n\twith strange whitespace."; list = str.split(QRegExp("\\s+")); // list: [ "Some", "text", "with", "strange", "whitespace." ] -//! [59] + //! [59] -//! [60] + //! [60] str = "This time, a normal English sentence."; list = str.split(QRegExp("\\W+"), QString::SkipEmptyParts); // list: [ "This", "time", "a", "normal", "English", "sentence" ] -//! [60] + //! [60] -//! [61] + //! [61] str = "Now: this sentence fragment."; list = str.split(QRegExp("\\b")); // list: [ "", "Now", ": ", "this", " ", "sentence", " ", "fragment", "." ] -//! [61] + //! [61] } void Widget::splitCaseSensitiveFunction() { -//! [62] + //! [62] QString str = "a,,b,c"; QStringList list1 = str.split(","); @@ -694,241 +694,241 @@ void Widget::splitCaseSensitiveFunction() QStringList list2 = str.split(",", QString::SkipEmptyParts); // list2: [ "a", "b", "c" ] -//! [62] + //! [62] } void Widget::sprintfFunction() { -//! [63] + //! [63] size_t BufSize; char buf[BufSize]; ::snprintf(buf, BufSize, "%lld", 123456789LL); QString str = QString::fromAscii(buf); -//! [63] + //! [63] -//! [64] + //! [64] QString result; QTextStream(&result) << "pi = " << 3.14; // result == "pi = 3.14" -//! [64] + //! [64] } void Widget::startsWithFunction() { -//! [65] + //! [65] QString str = "Bananas"; str.startsWith("Ban"); // returns true str.startsWith("Car"); // returns false -//! [65] + //! [65] } void Widget::toDoubleFunction() { -//! [66] + //! [66] QString str = "1234.56"; double val = str.toDouble(); // val == 1234.56 -//! [66] + //! [66] -//! [67] + //! [67] bool ok; double d; d = QString( "1234.56e-02" ).toDouble(&ok); // ok == true, d == 12.3456 -//! [67] + //! [67] -//! [68] //! [69] + //! [68] //! [69] QLocale::setDefault(QLocale::C); d = QString( "1234,56" ).toDouble(&ok); // ok == false -//! [68] + //! [68] d = QString( "1234.56" ).toDouble(&ok); // ok == true, d == 1234.56 -//! [69] //! [70] + //! [69] //! [70] 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 -//! [70] + //! [70] QLocale::setDefault(QLocale::C); d = QString( "1,234,567.89" ).toDouble(&ok); // ok == false } void Widget::toFloatFunction() { -//! [71] + //! [71] QString str1 = "1234.56"; str1.toFloat(); // returns 1234.56 bool ok; QString str2 = "R2D2"; str2.toFloat(&ok); // returns 0.0, sets ok to false -//! [71] + //! [71] } void Widget::toIntFunction() { -//! [72] + //! [72] QString str = "FF"; bool ok; int hex = str.toInt(&ok, 16); // hex == 255, ok == true int dec = str.toInt(&ok, 10); // dec == 0, ok == false -//! [72] + //! [72] } void Widget::toLongFunction() { -//! [73] + //! [73] QString str = "FF"; bool ok; long hex = str.toLong(&ok, 16); // hex == 255, ok == true long dec = str.toLong(&ok, 10); // dec == 0, ok == false -//! [73] + //! [73] } void Widget::toLongLongFunction() { -//! [74] + //! [74] QString str = "FF"; bool ok; qint64 hex = str.toLongLong(&ok, 16); // hex == 255, ok == true qint64 dec = str.toLongLong(&ok, 10); // dec == 0, ok == false -//! [74] + //! [74] } void Widget::toLowerFunction() { -//! [75] + //! [75] QString str = "Qt by NOKIA"; str = str.toLower(); // str == "qt by nokia" -//! [75] + //! [75] } void Widget::toShortFunction() { -//! [76] + //! [76] QString str = "FF"; bool ok; short hex = str.toShort(&ok, 16); // hex == 255, ok == true short dec = str.toShort(&ok, 10); // dec == 0, ok == false -//! [76] + //! [76] } void Widget::toUIntFunction() { -//! [77] + //! [77] QString str = "FF"; bool ok; uint hex = str.toUInt(&ok, 16); // hex == 255, ok == true uint dec = str.toUInt(&ok, 10); // dec == 0, ok == false -//! [77] + //! [77] } void Widget::toULongFunction() { -//! [78] + //! [78] QString str = "FF"; bool ok; ulong hex = str.toULong(&ok, 16); // hex == 255, ok == true ulong dec = str.toULong(&ok, 10); // dec == 0, ok == false -//! [78] + //! [78] } void Widget::toULongLongFunction() { -//! [79] + //! [79] QString str = "FF"; bool ok; quint64 hex = str.toULongLong(&ok, 16); // hex == 255, ok == true quint64 dec = str.toULongLong(&ok, 10); // dec == 0, ok == false -//! [79] + //! [79] } void Widget::toUShortFunction() { -//! [80] + //! [80] QString str = "FF"; bool ok; ushort hex = str.toUShort(&ok, 16); // hex == 255, ok == true ushort dec = str.toUShort(&ok, 10); // dec == 0, ok == false -//! [80] + //! [80] } void Widget::toUpperFunction() { -//! [81] + //! [81] QString str = "TeXt"; str = str.toUpper(); // str == "TEXT" -//! [81] + //! [81] } void Widget::trimmedFunction() { -//! [82] + //! [82] QString str = " lots\t of\nwhitespace\r\n "; str = str.trimmed(); // str == "lots\t of\nwhitespace" -//! [82] + //! [82] } void Widget::truncateFunction() { -//! [83] + //! [83] QString str = "Vladivostok"; str.truncate(4); // str == "Vlad" -//! [83] + //! [83] } void Widget::plusEqualOperator() { -//! [84] + //! [84] QString x = "free"; QString y = "dom"; x += y; // x == "freedom" -//! [84] + //! [84] } void Widget::arrayOperator() { -//! [85] + //! [85] QString str; if (str[0] == QChar('?')) str[0] = QChar('_'); -//! [85] + //! [85] } void Widget::midRefFunction() { -//! [midRef] + //! [midRef] QString x = "Nine pineapples"; QStringRef y = x.midRef(5, 4); // y == "pine" QStringRef z = x.midRef(5); // z == "pineapples" -//! [midRef] + //! [midRef] } void Widget::leftRefFunction() { -//! [leftRef] + //! [leftRef] QString x = "Pineapple"; QStringRef y = x.leftRef(4); // y == "Pine" -//! [leftRef] + //! [leftRef] } void Widget::rightRefFunction() { -//! [rightRef] + //! [rightRef] QString x = "Pineapple"; QStringRef y = x.rightRef(5); // y == "apple" -//! [rightRef] + //! [rightRef] } |