本文整理汇总了C++中QByteArray::toFloat方法的典型用法代码示例。如果您正苦于以下问题：C++ QByteArray::toFloat方法的具体用法？C++ QByteArray::toFloat怎么用？C++ QByteArray::toFloat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QByteArray的用法示例。
在下文中一共展示了QByteArray::toFloat方法的5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: attributeToFloat
qreal MStyleSheetAttribute::attributeToFloat(const QByteArray &attribute, bool *conversionOk)
{
QByteArray value = attribute.trimmed();
if (attribute.endsWith(units[PIXELS_UNIT])) {
// strip "px" from the end
value.truncate(value.length() - 2);
return value.toFloat(conversionOk);
}
if (attribute.endsWith(units[MM_UNIT])) {
// strip "mm" from the end
value.truncate(value.length() - 2);
return MDeviceProfile::instance()->mmToPixelsF(value.toFloat(conversionOk));
}
if (attribute.endsWith(units[PT_UNIT])) {
// strip "pt" from the end
value.truncate(value.length() - 2);
return MDeviceProfile::instance()->ptToPixelsF(value.toFloat(conversionOk));
}
return value.toFloat(conversionOk);
}示例2: getEnvFloat
static float getEnvFloat(const char* name, float defaultValue)
{
QByteArray stringValue = qgetenv(name);
bool ok;
float value = stringValue.toFloat(&ok);
return ok ? value : defaultValue;
}示例3: answerReceived
void TopLevel::answerReceived( int id, const QList<QByteArray> &answerList )
{
// we have received an answer from the daemon.
QByteArray answer;
if(!answerList.isEmpty()) answer = answerList[0];
QString s;
static QString unit;
static qlonglong mFree = 0;
static qlonglong mUsedApplication = 0;
static qlonglong mUsedTotal = 0;
static qlonglong sUsed = 0;
static qlonglong sFree = 0;
switch ( id ) {
case 1:
s = i18n( "CPU: %1%\xc2\x9c%1%", (int) (100 - answer.toFloat()) );
sbCpuStat->setText( s );
break;
case 2:
mFree = answer.toLongLong();
break;
case 3:
mUsedTotal = answer.toLongLong();
break;
case 4:
mUsedApplication = answer.toLongLong();
//Use a multi-length string
s = i18nc( "Arguments are formatted byte sizes (used/total)", "Memory: %1 / %2" "\xc2\x9c" "Mem: %1 / %2" "\xc2\x9c" "Mem: %1" "\xc2\x9c" "%1",
KFormat().formatByteSize( mUsedApplication*1024),
KFormat().formatByteSize( (mFree+mUsedTotal)*1024 ) );
sbMemTotal->setText( s );
break;
case 5:
sFree = answer.toLongLong();
break;
case 6:
sUsed = answer.toLongLong();
setSwapInfo( sUsed, sFree, unit );
break;
case 7: {
KSGRD::SensorIntegerInfo info( answer );
unit = KSGRD::SensorMgr->translateUnit( info.unit() );
break;
}
}
}示例4: readSocket
void PingPong::readSocket()
{
if (!socket)
return;
const char sep = ' ';
QByteArray line;
while (socket->canReadLine()) {
line = socket->readLine();
//qDebug() << QString::fromUtf8(line.constData(), line.length());
if (line.contains("result")) {
QList<QByteArray> result = line.split(sep);
if (result.size() > 2) {
QByteArray leftSide = result.at(1);
QByteArray rightSide = result.at(2);
m_resultLeft = leftSide.toInt();
m_resultRight = rightSide.toInt();
Q_EMIT resultChanged();
checkResult();
}
}
}
if ((m_proportionX == 0 || m_proportionY == 0)) {
QList<QByteArray> boardSize = line.split(sep);
if (boardSize.size() > 1) {
QByteArray boardWidth = boardSize.at(0);
QByteArray boardHeight = boardSize.at(1);
m_proportionX = m_boardWidth/boardWidth.toFloat();
m_proportionY = m_boardHeight/boardHeight.toFloat();
setMessage("Screen adjusted. Get ready!");
QTimer::singleShot(3000, this, SLOT(startGame()));
}
}
else if (m_role == 1) {
QList<QByteArray> boardSize = line.split(sep);
if (boardSize.size() > 1) {
QByteArray rightBlockY = boardSize.at(0);
m_rightBlockY = m_proportionY * rightBlockY.toFloat();
Q_EMIT rightBlockChanged();
}
}
else if (m_role == 2) {
QList<QByteArray> boardSize = line.split(sep);
if (boardSize.size() > 2) {
QByteArray ballX = boardSize.at(0);
QByteArray ballY = boardSize.at(1);
QByteArray leftBlockY = boardSize.at(2);
m_ballX = m_proportionX * ballX.toFloat();
m_ballY = m_proportionY * ballY.toFloat();
m_leftBlockY = m_proportionY * leftBlockY.toFloat();
Q_EMIT leftBlockChanged();
Q_EMIT ballChanged();
}
}
}示例5: QVariant
bool
Field::setDefaultValue(const QByteArray& def)
{
if (def.isNull()) {
m_defaultValue = QVariant();
return true;
}
bool ok;
switch (type()) {
case Byte: {
unsigned int v = def.toUInt(&ok);
if (!ok || v > 255)
m_defaultValue = QVariant();
else
m_defaultValue = QVariant(v);
break;
}
case ShortInteger: {
int v = def.toInt(&ok);
if (!ok || (!(m_options & Unsigned) && (v < -32768 || v > 32767)) || ((m_options & Unsigned) && (v < 0 || v > 65535)))
m_defaultValue = QVariant();
else
m_defaultValue = QVariant(v);
break;
}
case Integer: {//4 bytes
long v = def.toLong(&ok);
//js: FIXME if (!ok || (!(m_options & Unsigned) && (-v > 0x080000000 || v > (0x080000000-1))) || ((m_options & Unsigned) && (v < 0 || v > 0x100000000)))
if (!ok || (!(m_options & Unsigned) && (-v > (int)0x07FFFFFFF || v > (int)(0x080000000 - 1))))
m_defaultValue = QVariant();
else
m_defaultValue = QVariant((qint64)v);
break;
}
case BigInteger: {//8 bytes
//! @todo BigInteger support
/*
qint64 long v = def.toLongLong(&ok);
//TODO: 2-part decoding
if (!ok || (!(m_options & Unsigned) && (-v > 0x080000000 || v > (0x080000000-1))))
m_defaultValue = QVariant();
else
if (m_options & Unsigned)
m_defaultValue=QVariant((quint64) v);
else
m_defaultValue = QVariant((qint64)v);*/
break;
}
case Boolean: {
unsigned short v = def.toUShort(&ok);
if (!ok || v > 1)
m_defaultValue = QVariant();
else
m_defaultValue = QVariant((bool)v);
break;
}
case Date: {//YYYY-MM-DD
QDate date = QDate::fromString(def, Qt::ISODate);
if (!date.isValid())
m_defaultValue = QVariant();
else
m_defaultValue = QVariant(date);
break;
}
case DateTime: {//YYYY-MM-DDTHH:MM:SS
QDateTime dt = QDateTime::fromString(def, Qt::ISODate);
if (!dt.isValid())
m_defaultValue = QVariant();
else
m_defaultValue = QVariant(dt);
break;
}
case Time: {//HH:MM:SS
QTime time = QTime::fromString(def, Qt::ISODate);
if (!time.isValid())
m_defaultValue = QVariant();
else
m_defaultValue = QVariant(time);
break;
}
case Float: {
float v = def.toFloat(&ok);
if (!ok || ((m_options & Unsigned) && (v < 0.0)))
m_defaultValue = QVariant();
else
m_defaultValue = QVariant(v);
break;
}
case Double: {
double v = def.toDouble(&ok);
if (!ok || ((m_options & Unsigned) && (v < 0.0)))
m_defaultValue = QVariant();
else
m_defaultValue = QVariant(v);
break;
}
case Text: {
if (def.isNull() || (uint(def.length()) > maxLength()))
m_defaultValue = QVariant();
//.........这里部分代码省略.........