本文整理汇总了C++中QVariantList::takeFirst方法的典型用法代码示例。如果您正苦于以下问题：C++ QVariantList::takeFirst方法的具体用法？C++ QVariantList::takeFirst怎么用？C++ QVariantList::takeFirst使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QVariantList的用法示例。
在下文中一共展示了QVariantList::takeFirst方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: read_from
/* ========================================================================== */
QVariant LispPlugin::read_from(QVariantList& tokenz) {
if (tokenz.isEmpty())
throw runtime_error("unexpected EOF while reading");
QByteArray token = tokenz.takeFirst().toByteArray();
if (token == "(") {
//auto L = QVariant(QVariant::List);
QVariantList L;
while (tokenz[0] != ")")
L.append(read_from(tokenz));
tokenz.takeFirst(); // pop off )
return L;
} else if (token == ")") {
throw std::runtime_error("enexcepted )");
} else {
bool successCast;
auto i = token.toInt(&successCast);
if (successCast) return i;
auto d = token.toDouble(&successCast);
if (successCast) return d;
return QString(token);
}
}示例2: testDMSToRad
void TestConversions::testDMSToRad()
{
QVariantList data;
data << 0 << 0 << 0 << 0.;
data << 30 << 0 << 0 << M_PI/6;
data << 45 << 0 << 0 << M_PI/4;
data << 60 << 0 << 0 << M_PI/3;
data << 90 << 0 << 0 << M_PI/2;
data << 120 << 0 << 0 << 2*M_PI/3;
data << 180 << 0 << 0 << M_PI;
data << 270 << 0 << 0 << 3*M_PI/2;
data << 360 << 0 << 0 << 2*M_PI;
data << 0 << 30 << 0 << M_PI/360;
data << 0 << 45 << 0 << M_PI/240;
data << 30 << 30 << 0 << 61*M_PI/360;
data << 0 << 0 << 1 << M_PI/648000;
data << 90 << 58 << 30 << 1213*M_PI/2400;
data << 10 << 59 << 59 << 39599*M_PI/648000;
while (data.count() >= 4)
{
int deg, min, sec;
double rad;
deg = data.takeFirst().toInt();
min = data.takeFirst().toInt();
sec = data.takeFirst().toInt();
rad = data.takeFirst().toDouble();
QVERIFY2(std::abs(StelUtils::dmsToRad(deg, min, sec)-rad)<=ERROR_LIMIT, qPrintable(QString("%1d%2m%3s=%4").arg(deg).arg(min).arg(sec).arg(rad)));
}
}示例3: testHMSToRad
void TestConversions::testHMSToRad()
{
QVariantList data;
data << 0 << 0 << 0 << 0.;
data << 1 << 0 << 0 << M_PI/12;
data << 6 << 0 << 0 << M_PI/2;
data << 12 << 0 << 0 << M_PI;
data << 15 << 0 << 0 << 5*M_PI/4;
data << 0 << 15 << 0 << M_PI/720;
data << 0 << 0 << 15 << M_PI/43200;
data << 2 << 15 << 45 << 269*M_PI/1600;
data << 20 << 0 << 0 << 5*M_PI/3;
data << 24 << 0 << 0 << 2*M_PI;
data << 0 << 59 << 0 << 59*M_PI/10800;
data << 0 << 0 << 59 << 59*M_PI/648000;
data << 0 << 59 << 59 << 3599*M_PI/648000;
data << 3 << 59 << 59 << 165599*M_PI/648000;
while (data.count() >= 4)
{
int h, m, s;
double rad;
h = data.takeFirst().toInt();
m = data.takeFirst().toInt();
s = data.takeFirst().toInt();
rad = data.takeFirst().toDouble();
QVERIFY2(std::abs(StelUtils::hmsToRad(h, m, s)-rad)<=ERROR_LIMIT, qPrintable(QString("%1h%2m%3s=%4").arg(h).arg(m).arg(s).arg(rad)));
}
}示例4: checkChanges
bool ChangeLog::checkChanges(const QString &previousVersion, const QString ¤tVersion)
{
QVersionNumber previous = QVersionNumber::fromString(previousVersion);
QVersionNumber current = QVersionNumber::fromString(currentVersion);
if (current <= previous) {
qCInfo(CHANGELOG_CATEGORY) << "Current version isn't newer, than previous"
<< previousVersion << currentVersion;
return false;
}
QFileSelector fileSelector;
fileSelector.setExtraSelectors(QStringList() << QLocale::system().uiLanguages().constFirst().split('-').constFirst());
const QString path = fileSelector.select(":/changelogs/changelog.json");
QFile file(path);
if (!file.open(QIODevice::ReadOnly)) {
qCCritical(CHANGELOG_CATEGORY) << "Fail to open changelog file" << path << file.errorString();
return false;
}
QByteArray data = file.readAll();
QJsonParseError parseError;
QJsonDocument document = QJsonDocument::fromJson(data, &parseError);
if (parseError.error != QJsonParseError::NoError) {
qCritical(CHANGELOG_CATEGORY) << "Fail to parse changelog data JSON:"
<< data << "error at offset"
<< parseError.offset
<< parseError.errorString() << parseError.error;
return false;
}
QVariantList content = document.array().toVariantList();
while (!content.isEmpty()) {
if (QVersionNumber::fromString(content.constFirst().toMap().value("version").toString()) > current) {
content.takeFirst();
} else {
break;
}
}
QVariantList result;
while (!content.isEmpty()) {
if (QVersionNumber::fromString(content.constFirst().toMap().value("version").toString()) > previous) {
result.append(content.takeFirst());
} else {
break;
}
}
if (result.isEmpty()) {
qCWarning(CHANGELOG_CATEGORY) << "Empty changelog" << previousVersion << currentVersion;
return false;
}
emit changesAvailable(result);
return true;
}示例5: set
void QJnextMainLoop::set(QObject *object, QVariantList& args,
QByteArray* retval) {
QByteArray property = args.takeFirst().toByteArray();
const QMetaObject * meta = object->metaObject();
int propertyIndex = meta->indexOfProperty(property);
if (propertyIndex < 0) {
retval->append("No such property " + property);
return;
}
QMetaProperty metaprop = meta->property(propertyIndex);
if (!metaprop.isWritable()) {
retval->append("Property " + property + " is not writable");
return;
}
QVariant vValue = args.takeFirst();
/* handle enum inputs as text */
if (metaprop.isEnumType()) {
int id;
const QMetaEnum &enumerator = metaprop.enumerator();
QByteArray keys;
for (int i = 0; i < enumerator.keyCount(); ++i)
keys += enumerator.key(i) + QByteArray(" ");
#ifdef DEBUG_QJnextMainLoop
qDebug() << "[QJnextMainLoop]\tEnumerator" << enumerator.isFlag() << enumerator.scope() << enumerator.name() <<
keys;
#endif
if (enumerator.isFlag())
id = enumerator.keyToValue(vValue.toByteArray().constData());
else
id = enumerator.keysToValue(vValue.toByteArray().constData());
if (id != -1)
vValue = QVariant(id);
}
#ifdef DEBUG_QJnextMainLoop
qDebug() << "[QJnextMainLoop]\tSET" << meta->className() << property << vValue
<< vValue.canConvert(metaprop.type());
#endif
if (!vValue.convert(metaprop.type())) {
retval->append(
"Unable to convert \"" + vValue.toByteArray() + "\" to "
+ metaprop.typeName());
return;
}
if (!metaprop.write(object, vValue))
retval->append(
QByteArray("Unable to set property ") + meta->className() + "."
+ property + " to " + vValue.toByteArray());
else
*retval = QByteArray();
}示例6: QString
void TestDeltaT::testDeltaTByMorrisonStephenson1982WideDates()
{
// test data from Mathematical Astronomical Morsels, p. 8. [ISBN 0-943396-51-4]
QVariantList data;
data << 0 << 177;
data << 100 << 158;
data << 200 << 140;
data << 300 << 123;
data << 400 << 107;
data << 500 << 93;
data << 600 << 79;
data << 700 << 66;
data << 800 << 55;
data << 900 << 45;
data << 1000 << 35;
data << 1100 << 27;
data << 1200 << 20;
data << 1300 << 14;
data << 1400 << 9;
data << 1500 << 5;
data << 1600 << 2;
data << 1700 << 0;
data << 1800 << 0;
data << 1980 << 1;
data << 2075 << 4;
data << 2200 << 8;
data << 2300 << 13;
data << 2400 << 19;
data << 2500 << 26;
data << 2600 << 34;
data << 2700 << 43;
data << 2800 << 53;
data << 2900 << 64;
data << 3000 << 76;
while(data.count() >= 2)
{
// 30 seconds accuracy
int year = data.takeFirst().toInt();
int yout, mout, dout;
double JD;
double expectedResult = data.takeFirst().toDouble();
StelUtils::getJDFromDate(&JD, year, 1, 1, 0, 0, 0);
double result = StelUtils::getDeltaTByMorrisonStephenson1982(JD)/60.0;
StelUtils::getDateFromJulianDay(JD, &yout, &mout, &dout);
QVERIFY2(qRound(result) <= expectedResult, QString("date=%2 year=%3 result=%4 expected=%5")
.arg(QString("%1-%2-%3 00:00:00").arg(yout).arg(mout).arg(dout))
.arg(year)
.arg(result)
.arg(expectedResult)
.toUtf8());
}
}示例7: testRadToDMS
void TestConversions::testRadToDMS()
{
QVariantList data;
data << 0. << 0 << 0 << 0.;
data << M_PI/6 << 30 << 0 << 0.;
data << M_PI/4 << 45 << 0 << 0.;
data << M_PI/3 << 60 << 0 << 0.;
data << M_PI/2 << 90 << 0 << 0.;
data << 2*M_PI/3 << 120 << 0 << 0.;
data << M_PI << 180 << 0 << 0.;
data << 3*M_PI/2 << 270 << 0 << 0.;
data << M_PI/360 << 0 << 30 << 0.;
data << M_PI/240 << 0 << 45 << 0.;
data << 61*M_PI/360 << 30 << 30 << 0.;
data << M_PI/648000 << 0 << 0 << 1.;
data << 1213*M_PI/2400 << 90 << 58 << 30.;
data << 39599*M_PI/648000 << 10 << 59 << 59.;
data << -M_PI/36 << -5 << 0 << 0.;
data << -7*M_PI/8 << -157 << 30 << 0.;
data << -2*M_PI/5 << -72 << 0 << 0.;
data << -M_PI << -180 << 0 << 0.;
data << -10*M_PI/648 << -2 << 46 << 40.0;
while (data.count()>=4)
{
double rad, sec, seco, angle1, angle2;
int deg, min;
unsigned int dego, mino;
bool sign;
QString s;
rad = data.takeFirst().toDouble();
deg = data.takeFirst().toInt();
min = data.takeFirst().toInt();
sec = data.takeFirst().toDouble();
if (deg>=0)
angle1 = sec+min*60+deg*3600;
else
angle1 = -1*(sec+min*60+std::abs(deg)*3600);
StelUtils::radToDms(rad, sign, dego, mino, seco);
angle2 = seco+mino*60+dego*3600;
if (!sign)
{
angle2 = -1*angle2;
s = "-";
}
else
s = "+";
QVERIFY2(std::abs(angle1-angle2)<=ERROR_LIMIT, qPrintable(QString("%1rad=%2%3d%4m%5s").arg(rad).arg(s).arg(dego).arg(mino).arg(seco)));
}
}示例8: connect
void QJnextMainLoop::connect(QObject *object, uint id, QVariantList& args,
QByteArray *retval) {
QByteArray methodName = args.takeFirst().toByteArray();
QByteArray sid = args.takeFirst().toByteArray();
int argCount = -1;
const QMetaObject* meta = object->metaObject();
QMetaMethod method;
for (int i = 0; i < meta->methodCount(); ++i) {
method = meta->method(i);
if (QByteArray(method.signature()).startsWith(methodName + "(")) {
QList<QByteArray> types = method.parameterTypes();
if (types.size() > argCount) {
// TODO : always pick enum types
argCount = method.parameterTypes().size();
break;
}
}
}
if (argCount == -1) {
*retval = "No signal named " + methodName + " found";
return;
}
#ifdef DEBUG_QJnextMainLoop
qDebug() << "[QJnextMainLoop]\tSIGNAL.connect" << methodName << id << sid;
#endif
QJnextUserData * jnextData = dynamic_cast<QJnextUserData*>(object->userData(
QJnextMainLoop::userDataId));
if (jnextData == NULL) {
*retval = "Unable to retrieve jnextData from object "
+ QByteArray::number(id);
return;
}
SignalHandler *& handler = jnextData->signalHandlers[sid];
if (handler != NULL) {
#ifdef DEBUG_QJnextMainLoop
qDebug() << "[QJnextMainLoop]\tCONNECTED (chained)";
#endif
return;
}
handler = new SignalHandler(this, object, id, "com.blackberry.qt" + sid, meta, method);
if (!handler->isValid()) {
*retval = "QMetaObject::connect returned false. Unable to connect";
return;
}
#ifdef DEBUG_QJnextMainLoop
qDebug() << "[QJnextMainLoop]\tCONNECTED";
#endif
}示例9: listNamespace
void QJnextMainLoop::listNamespace(QVariantList& args, QByteArray* retval) {
QByteArray param = args.takeFirst().toByteArray();
QByteArray ns(param);
QByteArray ver = QtBridge::takeLastParam(ns, "@");
if (ver.size() == 0)
ver = "1.0";
QDeclarativeComponent component(declarativeEngine, this);
component.setData(
"import " + ns + " " + ver + "; import QtQuick 1.0; QtObject {}",
QUrl());
if (component.isError() || !component.isReady()) {
qWarning() << "COMPONENT ERROR" << component.errorString();
}
QList<QDeclarativeType*> types = QDeclarativeMetaType::qmlTypes();
QSet<QString> typeNames;
foreach(QDeclarativeType* type, types)
{
#ifdef DEBUG_QJnextMainLoop
qDebug() << "[QJnextMainLoop]\t" << type->qmlTypeName() << type->majorVersion()
<< type->minorVersion();
#endif
if (ns == type->module() && type->isCreatable()) {
QString qmlType = QString::fromLatin1(type->qmlTypeName());
typeNames << qmlType.split("/").takeLast();
}
}示例10: exec
/* ========================================================================== */
QVariant LispPlugin::exec(QVariant procName, QVariant _exps) {
QVariant result;
assert(isa(_exps, "StringList"));
QVariantList exps = _exps.toList();
if ("*" == procName) {
auto a = exps[0].toDouble();
auto b = exps[1].toDouble();
return a * b;
} else if ("+" == procName) {
auto a = exps[0].toDouble();
auto b = exps[1].toDouble();
return a + b;
} else if ("-" == procName) {
auto a = exps[0].toDouble();
auto b = exps[1].toDouble();
return a - b;
} else if ("<=" == procName) {
auto a = exps[0].toDouble();
auto b = exps[1].toDouble();
return a <= b;
} else {
if (exps.size() == 1)
_exps = exps.takeFirst();
return CallExternal(procName.toByteArray(), _exps);
}
throw runtime_error(
QString("Unable to resolve symbol: %1 in this context")
.arg(procName.toString()).toStdString());
}示例11: get
void QJnextMainLoop::get(QObject *object, QVariantList& args,
QByteArray* retval) {
QByteArray property = args.takeFirst().toByteArray();
const QMetaObject * meta = object->metaObject();
int propertyIndex = meta->indexOfProperty(property);
if (propertyIndex < 0) {
retval->append("No such property " + property);
return;
}
QMetaProperty metaprop = meta->property(propertyIndex);
if (!metaprop.isReadable()) {
retval->append("Property " + property + " is not readable");
return;
}
QVariant value = metaprop.read(object);
if (value.isNull()) {
qWarning() << "[QJnextMainLoop]\tNULL value ignored" << object->property(property);
}
#ifdef DEBUG_QJnextMainLoop
qDebug() << "[QJnextMainLoop]\tVALUE" << value << object->property(property) << metaprop.isEnumType();
#endif
if (metaprop.isEnumType()) {
bool ok;
int enumValue = value.toInt(&ok);
if (!ok) {
int status = -1;
void *argv[] = { 0, &value, &status };
QMetaObject::metacall(const_cast<QObject*>(object), QMetaObject::ReadProperty,
propertyIndex + meta->propertyOffset(), argv);
const int * enumRaw = static_cast<const int *>(argv[0]);
if (status == -1 && enumRaw != 0) {
const QMetaEnum & iEnum = metaprop.enumerator();
if (iEnum.isFlag())
value = iEnum.valueToKeys(*enumRaw);
else
value = iEnum.valueToKey(*enumRaw);
} else {
// someone is evil and didn't register enumerations properly
qDebug() << "[QJnextMainLoop]\t" << "!!!!!!!" << argv[0] << value;
}
} else if (metaprop.enumerator().isFlag()) {
*retval = metaprop.enumerator().valueToKeys(enumValue);
return;
} else {
*retval = metaprop.enumerator().valueToKey(enumValue);
return;
}
}
*retval = value.toByteArray();
}示例12: setWriteIns
void Decision::setWriteIns(QVariantList newWriteIns)
{
if (newWriteIns == writeIns())
return;
auto writeInList = m_decision.initWriteIns(newWriteIns.size());
for (::UnsignedContest::Contestant::Builder writeInBuilder : writeInList) {
auto writeIn = newWriteIns.takeFirst().toMap();
writeInBuilder.setName(writeIn["name"].toString().toStdString());
writeInBuilder.setDescription(writeIn["description"].toString().toStdString());
}
emit writeInsChanged();
}示例13: testRadToHMS
void TestConversions::testRadToHMS()
{
QVariantList data;
data << 0. << 0 << 0 << 0.;
data << M_PI/36 << 0 << 19 << 59.9;
data << 7*M_PI/8 << 10 << 30 << 0.;
data << 2*M_PI/5 << 4 << 48 << 0.;
while (data.count()>=4)
{
double rad, s, so, t1, t2;
int h, m;
unsigned int ho, mo;
rad = data.takeFirst().toDouble();
h = data.takeFirst().toInt();
m = data.takeFirst().toInt();
s = data.takeFirst().toDouble();
t1 = s+m*60+h*3600;
StelUtils::radToHms(rad, ho, mo, so);
t2 = so+mo*60+ho*3600;
QVERIFY2(std::abs(t1-t2)<=0.1, qPrintable(QString("%1rad=%2h%3m%4s").arg(rad).arg(ho).arg(mo).arg(so)));
}
}示例14: init
bool ApplicationsMenuApplet::init(QWidget* parent)
{
if(m_settings.type() == QVariant::List)
{
QVariantList list = m_settings.value<QVariantList>();
while(!list.isEmpty())
{
const char** names = reinterpret_cast<const char**>(list.takeFirst().value<void*>());
QMenu* menu = m_menu->addMenu(g_menu_names.value(names[0]));
menu->setIcon(QIcon::fromTheme(names[1]).pixmap(menu->height(),menu->height()));
m_menus.insert(g_menu_names.value(names[0]), menu);
}
QStringList categories;
for(QList<DesktopEntryObject*>::iterator pos = m_entries.begin(); pos != m_entries.end(); ++pos)
{
if(m_menus.contains((*pos)->Category()))
m_menus[(*pos)->Category()]->addAction((*pos)->Action());
else
m_menus["Other"]->addAction((*pos)->Action());
/*
categories = (*pos)->Categories();
for(QStringList::iterator pos2 = categories.begin(); pos2 != categories.end(); ++pos2)
if(m_menus.contains(*pos2))
m_menus[*pos2]->addAction((*pos)->Action());
*/
}
}
m_menu->addSeparator();
m_menu->addAction(QIcon::fromTheme("application-exit"), "Quit", qApp, SLOT(quit()));
/*
connect(DesktopApplications::instance(), SIGNAL(applicationUpdated(const DesktopApplication&)), this, SLOT(onApplicationUpdated(const DesktopApplication&)));
connect(DesktopApplications::instance(), SIGNAL(applicationRemoved(const QString&)), this, SLOT(onApplicationRemoved(const QString&)));
QList<DesktopApplication> apps = DesktopApplications::instance()->applications();
foreach(const DesktopApplication& app, apps)
onApplicationUpdated(app);
*/
return true;
}示例15: PQuery
QSqlQuery DatabaseConnection::PQuery(QString queryStr, QVariantList args)
{
if(!m_db.isOpen())
throw std::runtime_error("Database : Tentative de requete sur une connexion non ouverte : " + queryStr.toStdString()
+ " : " + m_db.lastError().text().toLatin1().constData());
QSqlQuery query(m_db);
query.prepare(queryStr);
while (!args.isEmpty())
query.addBindValue(args.takeFirst());
if(!query.exec())
throw std::runtime_error("Database : Erreur lors de l'execution de \"" + queryStr.toStdString() + "\" : "
+ query.lastError().text().toLatin1().data());
return query;
}