/*!
Calculate the minimum length that is needed to draw the scale
\param font Font used for painting the labels
\sa extent()
*/
int QwtScaleDraw::minLength( const QFont &font ) const
{
int startDist, endDist;
getBorderDistHint( font, startDist, endDist );
const QwtScaleDiv &sd = scaleDiv();
const uint minorCount =
sd.ticks( QwtScaleDiv::MinorTick ).count() +
sd.ticks( QwtScaleDiv::MediumTick ).count();
const uint majorCount =
sd.ticks( QwtScaleDiv::MajorTick ).count();
int lengthForLabels = 0;
if ( hasComponent( QwtAbstractScaleDraw::Labels ) )
{
if ( majorCount >= 2 )
lengthForLabels = minLabelDist( font ) * ( majorCount - 1 );
}
int lengthForTicks = 0;
if ( hasComponent( QwtAbstractScaleDraw::Ticks ) )
{
const double pw = qMax( 1, penWidth() ); // penwidth can be zero
lengthForTicks = qCeil( ( majorCount + minorCount ) * ( pw + 1.0 ) );
}
return startDist + endDist + qMax( lengthForLabels, lengthForTicks );
}
/*!
\return Minimum size hint
\warning The return value depends on the font and the scale.
\sa sizeHint()
*/
QSize QwtThermo::minimumSizeHint() const
{
int w = 0, h = 0;
if ( d_data->scalePosition != NoScale )
{
const int sdExtent = qCeil( scaleDraw()->extent( font() ) );
const int sdLength = scaleDraw()->minLength( font() );
w = sdLength;
h = d_data->pipeWidth + sdExtent + d_data->spacing;
}
else // no scale
{
w = 200;
h = d_data->pipeWidth;
}
if ( d_data->orientation == Qt::Vertical )
qSwap( w, h );
w += 2 * d_data->borderWidth;
h += 2 * d_data->borderWidth;
// finally add the margins
int left, right, top, bottom;
getContentsMargins( &left, &top, &right, &bottom );
w += left + right;
h += top + bottom;
return QSize( w, h );
}
qreal SoftSlider::tickSpan(qreal min, qreal max, qreal space, qreal minsep)
{
if (space == 0)
return qInf();
qreal jmp = minsep * (max - min) / space;
qreal b = 1;
while (b * 10 <= jmp)
b *= 10;
if (jmp > 0)
while (b / 10 >= jmp)
b /= 10;
int q = qCeil(jmp / b);
if (q > 5)
return b * 10;
if (q > 2)
return b * 5;
if (q > 1)
return b * 2;
return b;
}
void QSGTextNode::addTextDecorations(Decoration decorations, const QPointF &position,
const QColor &color, qreal width, qreal lineThickness,
qreal underlinePos, qreal ascent)
{
QRectF line(position.x(), position.y() - lineThickness / 2.0, width, lineThickness);
if (decorations & Underline) {
int underlinePosition = qCeil(underlinePos);
QRectF underline(line);
underline.translate(0.0, underlinePosition);
appendChildNode(new QSGSimpleRectNode(underline, color));
}
if (decorations & Overline) {
QRectF overline(line);
overline.translate(0.0, -ascent);
appendChildNode(new QSGSimpleRectNode(overline, color));
}
if (decorations & StrikeOut) {
QRectF strikeOut(line);
strikeOut.translate(0.0, ascent / -3.0);
appendChildNode(new QSGSimpleRectNode(strikeOut, color));
}
}
void QDeclarativeRectangle::generateRoundedRect()
{
Q_D(QDeclarativeRectangle);
if (d->rectImage.isNull()) {
const int pw = d->pen && d->pen->isValid() ? d->pen->width() : 0;
const int radius = qCeil(d->radius); //ensure odd numbered width/height so we get 1-pixel center
QString key = QLatin1String("q_") % QString::number(pw) % d->color.name() % QString::number(d->color.alpha(), 16) % QLatin1Char('_') % QString::number(radius);
if (d->pen && d->pen->isValid())
key += d->pen->color().name() % QString::number(d->pen->color().alpha(), 16);
if (!QPixmapCache::find(key, &d->rectImage)) {
d->rectImage = QPixmap(radius*2 + 3 + pw*2, radius*2 + 3 + pw*2);
d->rectImage.fill(Qt::transparent);
QPainter p(&(d->rectImage));
p.setRenderHint(QPainter::Antialiasing);
if (d->pen && d->pen->isValid()) {
QPen pn(QColor(d->pen->color()), d->pen->width());
p.setPen(pn);
} else {
p.setPen(Qt::NoPen);
}
p.setBrush(d->color);
if (pw%2)
p.drawRoundedRect(QRectF(qreal(pw)/2+1, qreal(pw)/2+1, d->rectImage.width()-(pw+1), d->rectImage.height()-(pw+1)), d->radius, d->radius);
else
p.drawRoundedRect(QRectF(qreal(pw)/2, qreal(pw)/2, d->rectImage.width()-pw, d->rectImage.height()-pw), d->radius, d->radius);
// end painting before inserting pixmap
// to pixmap cache to avoid a deep copy
p.end();
QPixmapCache::insert(key, d->rectImage);
}
}
}
// Set waveform sample rate.
void SpikePlot_CV::setSampleRate(double newSampleRate)
{
// Calculate time step, in msec.
tStepMsec = 1000.0 / newSampleRate;
// Calculate number of time steps in 3 msec sample.
totalTSteps = qCeil(3.0 / tStepMsec) + 1;
// Calculate number of time steps in the 1 msec pre-trigger
// display interval.
preTriggerTSteps = qCeil(1.0 / tStepMsec);
// Clear old waveforms since the sample rate has changed.
numSpikeWaveforms = 0;
startingNewChannel = true;
}
/*virtual*/
int ListItemContainer::maxItemCountInItemBuffer() const
{
int count = AbstractItemContainer::maxItemCountInItemBuffer();
if (count > 0) {
int currentItemCount = m_items.count();
qreal heightOfOneItem = 0;
if (currentItemCount > 0)
{
heightOfOneItem = m_layout->effectiveSizeHint(Qt::PreferredSize).height() / currentItemCount;
}
int guess = 0;
if( heightOfOneItem <= 0 ) {
if (m_prototype) {
heightOfOneItem = m_prototype->effectiveSizeHint(Qt::PreferredSize).height();
}
else
heightOfOneItem = 50; // TODO magic number, do we have better guess if prototype is not set?
}
if (heightOfOneItem > 0) {
guess = qCeil(m_itemView->boundingRect().height() / heightOfOneItem) + m_bufferSize;
if (guess < currentItemCount) {
if( guess > currentItemCount-2) { // TODO magic number here, Can we use buffer size?
guess = currentItemCount;
}
}
}
count = qMin(guess, count);
}
return count;
}
void Downloader::getTags()
{
if (m_sites->empty())
{
std::cerr << "No valid source found" << std::endl;
return;
}
m_waiting = 0;
m_cancelled = false;
for (int i = 0; i < m_sites->size(); ++i)
{
int pages = qCeil((float)m_max / m_perpage);
if (pages <= 0 || m_perpage <= 0 || m_max <= 0)
pages = 1;
Site *site = m_sites->at(i);
connect(site, &Site::finishedLoadingTags, this, &Downloader::finishedLoadingTags);
for (int p = 0; p < pages; ++p)
{
m_pagesP->append(QPair<Site*, int>(site, m_page + p));
m_opagesP->append(QPair<Site*, int>(site, m_page + p));
m_waiting++;
}
}
loadNext();
}
void Downloader::getUrls()
{
if (m_sites->empty())
{
std::cerr << "No valid source found" << std::endl;
return;
}
m_waiting = 0;
m_ignored = 0;
m_duplicates = 0;
m_cancelled = false;
auto sites = Site::getAllSites();
for (int i = 0; i < m_sites->size(); ++i)
{
int pages = qCeil((float)m_max / m_perpage);
if (pages <= 0 || m_perpage <= 0 || m_max <= 0)
pages = 1;
for (int p = 0; p < pages; ++p)
{
Page *page = new Page(m_sites->at(i), sites, m_tags, m_page + p, m_perpage, m_postfiltering, true, this);
connect(page, &Page::finishedLoading, this, &Downloader::finishedLoadingUrls);
m_pages->append(page);
m_opages->append(page);
m_waiting++;
}
}
loadNext();
}
static double ceil_with_tolerance( double value )
{
if ( qAbs( value - qRound( value ) ) < 1e-6 )
return qRound( value );
else
return qCeil( value );
}
void SingleCellViewGraphPanelPlotWidget::optimiseAxis(const int &pAxisId,
double &pMin,
double &pMax) const
{
// Make sure that the given values are different
if (pMin == pMax) {
// The given values are the same, so update them so that we can properly
// optimise them below
double powerValue = pMin?qFloor(log10(qAbs(pMin)))-1.0:0.0;
pMin = pMin-pow(10.0, powerValue);
pMax = pMax+pow(10.0, powerValue);
}
// Optimise the axis' values so that they fall onto a factor of the axis'
// minor step
uint base = axisScaleEngine(pAxisId)->base();
double majorStep = QwtScaleArithmetic::divideInterval(pMax-pMin,
axisMaxMajor(pAxisId),
base);
double minorStep = QwtScaleArithmetic::divideInterval(majorStep,
axisMaxMinor(pAxisId),
base);
pMin = qFloor(pMin/minorStep)*minorStep;
pMax = qCeil(pMax/minorStep)*minorStep;
}
//--------------------------------------------------------------------------------------------------
// FUNCTION: paint
//--------------------------------------------------------------------------------------------------
void QProgressBarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
double progress = index.data(QExecutableModel::ProgressRole).toDouble() * 100;
if (std::isnan(progress) || progress <= 0.0 || progress >= 100.0)
{
QStyledItemDelegate::paint(painter, option, index);
}
else
{
const QFontMetrics &fm = option.fontMetrics;
auto height = qMin(qCeil(QFontMetricsF(fm).height()) + 2, option.rect.height());
int adjust = (option.rect.height() - height) / 2;
double progress = index.data(QExecutableModel::ProgressRole).toDouble() * 100;
QStyleOptionProgressBar progressBarOption;
progressBarOption.rect = option.rect.adjusted(2, adjust, -2, -adjust);
progressBarOption.rect.setWidth(option.rect.width() - 2 * 2);
progressBarOption.minimum = 0;
progressBarOption.maximum = 100;
progressBarOption.progress = progress;
if (option.state & QStyle::State_Selected)
{
painter->setBrush(option.palette.highlightedText());
}
QApplication::style()->drawControl(QStyle::CE_ProgressBar,
&progressBarOption, painter);
}
}
void LanczosShader::createKernel(float delta, int *size)
{
const float a = 2.0;
// The two outermost samples always fall at points where the lanczos
// function returns 0, so we'll skip them.
const int sampleCount = qBound(3, qCeil(delta * a) * 2 + 1 - 2, 29);
const int center = sampleCount / 2;
const int kernelSize = center + 1;
const float factor = 1.0 / delta;
QVector<float> values(kernelSize);
float sum = 0;
for (int i = 0; i < kernelSize; i++) {
const float val = lanczos(i * factor, a);
sum += i > 0 ? val * 2 : val;
values[i] = val;
}
memset(m_kernel, 0, 16 * sizeof(QVector4D));
// Normalize the kernel
for (int i = 0; i < kernelSize; i++) {
const float val = values[i] / sum;
m_kernel[i] = QVector4D(val, val, val, val);
}
*size = kernelSize;
}
/*!
\brief Return a minimum size hint
\warning The return value depends on the font and the scale.
\sa sizeHint()
*/
QSize QwtThermo::minimumSizeHint() const
{
int w = 0, h = 0;
if ( d_data->scalePos != NoScale )
{
const int sdExtent = qCeil( scaleDraw()->extent( font() ) );
const int sdLength = scaleDraw()->minLength( font() );
w = sdLength;
h = d_data->thermoWidth + sdExtent +
d_data->borderWidth + d_data->scaleDist;
}
else // no scale
{
w = 200;
h = d_data->thermoWidth;
}
if ( d_data->orientation == Qt::Vertical )
qSwap( w, h );
w += 2 * d_data->borderWidth;
h += 2 * d_data->borderWidth;
return QSize( w, h );
}
void TextDocument::drawBackground(QPainter* painter, const QRect& bounds)
{
if (d.highlights.isEmpty() && d.lowlight == -1)
return;
const int margin = qCeil(documentMargin());
const QAbstractTextDocumentLayout* layout = documentLayout();
static QPointer<TextLowlight> lowlightFrame = 0;
if (!lowlightFrame)
lowlightFrame = new TextLowlight(static_cast<QWidget*>(painter->device()));
static QPointer<TextHighlight> highlightFrame = 0;
if (!highlightFrame)
highlightFrame = new TextHighlight(static_cast<QWidget*>(painter->device()));
if (d.lowlight != -1) {
const QAbstractTextDocumentLayout* layout = documentLayout();
const int margin = qCeil(documentMargin());
const QTextBlock to = findBlockByNumber(d.lowlight);
if (to.isValid()) {
QRect br = layout->blockBoundingRect(to).toAlignedRect();
br.setTop(0);
if (bounds.intersects(br)) {
br.adjust(-margin - 1, 0, margin + 1, 2);
painter->translate(br.topLeft());
lowlightFrame->setGeometry(br);
lowlightFrame->render(painter);
painter->translate(-br.topLeft());
}
}
}
foreach (int highlight, d.highlights) {
QTextBlock block = findBlockByNumber(highlight);
if (block.isValid()) {
QRect br = layout->blockBoundingRect(block).toAlignedRect();
if (bounds.intersects(br)) {
br.adjust(-margin - 1, 0, margin + 1, 2);
painter->translate(br.topLeft());
highlightFrame->setGeometry(br);
highlightFrame->render(painter);
painter->translate(-br.topLeft());
}
}
}
}
lmcImagePicker::lmcImagePicker(
QWidget *parent,
QList<QString>* source,
int picSize,
int columns,
int* selected,
int actionIndex )
: QTableWidget(parent)
{
setMouseTracking(true);
setBackgroundRole(QPalette::Window);
setIconSize(QSize(picSize, picSize));
setFrameShape(QFrame::NoFrame);
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setEditTriggers(QAbstractItemView::NoEditTriggers);
setSelectionMode(QAbstractItemView::NoSelection);
setShowGrid(false);
horizontalHeader()->setVisible(false);
verticalHeader()->setVisible(false);
setStyleSheet("QTableWidget { padding: 4px }"); // padding around table
max_col = columns;
int max_row = qCeil(source->count() / (qreal)max_col);
setColumnCount(max_col);
setRowCount(max_row);
int cellSize = picSize + 8;
verticalHeader()->setDefaultSectionSize(cellSize);
verticalHeader()->setMinimumSectionSize(cellSize);
horizontalHeader()->setDefaultSectionSize(cellSize);
horizontalHeader()->setMinimumSectionSize(cellSize);
// set min and max size of table, with padding included
setMinimumSize(max_col * cellSize + 8, max_row * cellSize + 8);
setMaximumSize(max_col * cellSize + 8, max_row * cellSize + 8);
for(int i = 0; i < max_row; i++) {
for(int j = 0; j < max_col; j++) {
int k = (i * max_col) + j;
QTableWidgetItem* item = new QTableWidgetItem();
item->setData(TypeRole, 0);
if(k < source->count()) {
item->setIcon(QIcon(source->value(k)));
item->setData(TypeRole, 1);
item->setSizeHint(QSize(picSize, picSize));
item->setBackground(this->palette().window());
}
setItem(i, j, item);
}
}
this->actionIndex = actionIndex;
this->selected = selected;
this->hoverItem = NULL;
}
/*!
\brief Return a minimum size hint
\warning The return value of QwtKnob::minimumSizeHint() depends on the
font and the scale.
*/
QSize QwtKnob::minimumSizeHint() const
{
// Add the scale radial thickness to the knobWidth
const int sh = qCeil( scaleDraw()->extent( font() ) );
const int d = 2 * sh + 2 * d_data->scaleDist + d_data->knobWidth;
return QSize( d, d );
}
void QDeclarativeFlow::doPositioning(QSizeF *contentSize)
{
Q_D(QDeclarativeFlow);
int hoffset = 0;
int voffset = 0;
int linemax = 0;
for (int i = 0; i < positionedItems.count(); ++i) {
const PositionedItem &child = positionedItems.at(i);
if (!child.item || isInvisible(child.item))
continue;
if (d->flow == LeftToRight) {
if (hoffset && hoffset + child.item->width() > width()) {
hoffset = 0;
voffset += linemax + spacing();
linemax = 0;
}
} else {
if (voffset && voffset + child.item->height() > height()) {
voffset = 0;
hoffset += linemax + spacing();
linemax = 0;
}
}
if(child.item->x() != hoffset || child.item->y() != voffset){
positionX(hoffset, child);
positionY(voffset, child);
}
contentSize->setWidth(qMax(contentSize->width(), hoffset + child.item->width()));
contentSize->setHeight(qMax(contentSize->height(), voffset + child.item->height()));
if (d->flow == LeftToRight) {
hoffset += child.item->width();
hoffset += spacing();
linemax = qMax(linemax, qCeil(child.item->height()));
} else {
voffset += child.item->height();
voffset += spacing();
linemax = qMax(linemax, qCeil(child.item->width()));
}
}
}
void SourceEditor::linesCountChanged()
{
int marginWidth = qCeil( qLn( lines() ) / qLn(10) + 0.000001 );
if (marginWidth != m_marginWidth) {
m_marginWidth = marginWidth;
setMarginWidth(NumberMargin, QString(marginWidth, '3') + ' ');
}
}
void QSvgAnimateColor::apply(QPainter *p, const QSvgNode *node, QSvgExtraStates &)
{
qreal totalTimeElapsed = node->document()->currentElapsed();
if (totalTimeElapsed < m_from || m_finished)
return;
qreal animationFrame = 0;
if (m_totalRunningTime != 0)
animationFrame = (totalTimeElapsed - m_from) / m_totalRunningTime;
if (m_repeatCount >= 0 && m_repeatCount < animationFrame) {
m_finished = true;
animationFrame = m_repeatCount;
}
qreal percentOfAnimation = animationFrame;
if (percentOfAnimation > 1) {
percentOfAnimation -= ((int)percentOfAnimation);
}
qreal currentPosition = percentOfAnimation * (m_colors.count() - 1);
int startElem = qFloor(currentPosition);
int endElem = qCeil(currentPosition);
QColor start = m_colors[startElem];
QColor end = m_colors[endElem];
qreal percentOfColorMorph = currentPosition;
if (percentOfColorMorph > 1) {
percentOfColorMorph -= ((int)percentOfColorMorph);
}
// Interpolate between the two fixed colors start and end
qreal aDiff = (end.alpha() - start.alpha()) * percentOfColorMorph;
qreal rDiff = (end.red() - start.red()) * percentOfColorMorph;
qreal gDiff = (end.green() - start.green()) * percentOfColorMorph;
qreal bDiff = (end.blue() - start.blue()) * percentOfColorMorph;
int alpha = int(start.alpha() + aDiff);
int red = int(start.red() + rDiff);
int green = int(start.green() + gDiff);
int blue = int(start.blue() + bDiff);
QColor color(red, green, blue, alpha);
if (m_fill) {
QBrush b = p->brush();
m_oldBrush = b;
b.setColor(color);
p->setBrush(b);
} else {
QPen pen = p->pen();
m_oldPen = pen;
pen.setColor(color);
p->setPen(pen);
}
}
static QRectF qwtExpandToPixels(const QRectF &rect, const QRectF &pixelRect)
{
const double pw = pixelRect.width();
const double ph = pixelRect.height();
const double dx1 = pixelRect.left() - rect.left();
const double dx2 = pixelRect.right() - rect.right();
const double dy1 = pixelRect.top() - rect.top();
const double dy2 = pixelRect.bottom() - rect.bottom();
QRectF r;
r.setLeft( pixelRect.left() - qCeil( dx1 / pw ) * pw );
r.setTop( pixelRect.top() - qCeil( dy1 / ph ) * ph );
r.setRight( pixelRect.right() - qFloor( dx2 / pw ) * pw );
r.setBottom( pixelRect.bottom() - qFloor( dy2 / ph ) * ph );
return r;
}
int averageCharacterWidth(const QFont& font) {
const QFontMetrics metrics(font);
int totalWidth = 0;
for (int i = 32; i < 128; ++i) {
totalWidth += metrics.width(QChar(i));
}
return qCeil(totalWidth/97.);
}
/*!
Marks areas of the cache that intersect with the given \a rect as dirty and
in need of being refreshed.
\sa clearCache()
*/
void QDeclarativePaintedItem::dirtyCache(const QRect& rect)
{
Q_D(QDeclarativePaintedItem);
QRect srect(qCeil(rect.x()*d->contentsScale),
qCeil(rect.y()*d->contentsScale),
qCeil(rect.width()*d->contentsScale),
qCeil(rect.height()*d->contentsScale));
for (int i=0; i < d->imagecache.count(); ) {
QDeclarativePaintedItemPrivate::ImageCacheItem *c = d->imagecache[i];
QRect isect = (c->area & srect) | c->dirty;
if (isect == c->area && !inpaint) {
delete d->imagecache.takeAt(i);
} else {
c->dirty = isect;
++i;
}
}
}
Keyboard::Keyboard(int base, int columns, QWidget *parent)
{
QGridLayout *gridLayout = new QGridLayout;
gridLayout->setSpacing(0);
gridLayout->setMargin(0);
gridLayout->setContentsMargins(0,0,0,0);
this->setLayout(gridLayout);
int elementsCount = base + 1;
while (elementsCount % columns != 0)
elementsCount++;
int rows = qCeil(qreal(elementsCount) / qreal(columns));
int column = 0, row = 0;
for (int v = 0; v < elementsCount; ++v) {
char c;
if (v < 9) {
c = '0' + v;
}
else {
c = 'A' + v - 10;
}
if (base != 2) {
c++; // do not start with '0'
}
QString value;
if ((base == 2 && v + 1 > base) || (base != 2 && v + 1 >= base)) {
if (column + 1 == columns) {
value = QString("delete");
}
else if (((column + 1) / 2) == columns / 2) {
value = "0";
}
else {
value = "";
}
}
else {
value = QString(c);
}
QPushButton *button = new QPushButton(value);
button->setObjectName(value);
if (value == "") {
button->setEnabled(false);
}
connect(button, SIGNAL(pressed()), this, SLOT(pressedButton()));
gridLayout->addWidget(button,row,column);
column = (column + 1) % columns;
if (column == 0) {
row = (row + 1);
}
}
}
/*!
\brief Return a minimum size hint
\warning The return value of QwtDial::minimumSizeHint() depends on the
font and the scale.
*/
QSize QwtDial::minimumSizeHint() const
{
int sh = 0;
if ( d_data->scaleDraw )
sh = qCeil( d_data->scaleDraw->extent( font() ) );
const int d = 3 * sh + 2 * lineWidth();
return QSize( d, d );
}
QSGTexture* HsQMLCanvasBackEnd::updateFBO(qreal w, qreal h)
{
if (HsQMLCanvas::Inline == mDisplayMode) {
if (!mFBO || w != mCanvasWidth || h != mCanvasHeight) {
mCanvasWidth = w;
mCanvasHeight = h;
QSize dims(qCeil(mCanvasWidth), qCeil(mCanvasHeight));
mFBO.reset(new QOpenGLFramebufferObject(
dims, QOpenGLFramebufferObject::Depth));
mTexture.reset(mWindow->createTextureFromId(
mFBO->texture(), dims, QQuickWindow::TextureHasAlphaChannel));
}
}
else {
mTexture.reset();
mFBO.reset();
}
return mTexture.data();
}
void dtkComposerNodeNumberOperatorUnaryCeil::run(void)
{
if (d->receiver.dataType() == QMetaType::Double) {
d->value_i = qCeil(*(d->receiver.data<double>()));
d->emitter.setData<qlonglong>(&d->value_i);
} else {
d->emitter.setData<qlonglong>(d->receiver.data<qlonglong>());
}
}
void PlotAxes::setLimits(qreal min, qreal max, qreal minTime, qreal maxTime) {
this->min = min;
this->max = max;
this->minTime = minTime;
this->maxTime = maxTime;
this->firstHour = qCeil(minTime / 3600);
this->lastHour = qFloor(maxTime / 3600);
setGeometry(rect);
}
int OwncloudPropagator::maximumActiveTransferJob()
{
if (_downloadLimit.fetchAndAddAcquire(0) != 0
|| _uploadLimit.fetchAndAddAcquire(0) != 0
|| !_syncOptions._parallelNetworkJobs) {
// disable parallelism when there is a network limit.
return 1;
}
return qMin(3, qCeil(hardMaximumActiveJob() / 2.));
}
/*!
\brief Calculate a scale division for a date/time interval
\param x1 First interval limit
\param x2 Second interval limit
\param maxMajorSteps Maximum for the number of major steps
\param maxMinorSteps Maximum number of minor steps
\param stepSize Step size. If stepSize == 0, the scaleEngine
calculates one.
\return Calculated scale division
*/
QwtScaleDiv QwtDateScaleEngine::divideScale( double x1, double x2,
int maxMajorSteps, int maxMinorSteps, double stepSize ) const
{
if ( maxMajorSteps < 1 )
maxMajorSteps = 1;
const double min = qMin( x1, x2 );
const double max = qMax( x1, x2 );
const QDateTime from = toDateTime( min );
const QDateTime to = toDateTime( max );
if ( from == to )
return QwtScaleDiv();
stepSize = qAbs( stepSize );
if ( stepSize > 0.0 )
{
// as interval types above hours are not equidistant
// ( even days might have 23/25 hours because of daylight saving )
// the stepSize is used as a hint only
maxMajorSteps = qCeil( ( max - min ) / stepSize );
}
const QwtDate::IntervalType intvType =
intervalType( from, to, maxMajorSteps );
QwtScaleDiv scaleDiv;
if ( intvType == QwtDate::Millisecond )
{
// for milliseconds and below we can use the decimal system
scaleDiv = QwtLinearScaleEngine::divideScale( min, max,
maxMajorSteps, maxMinorSteps, stepSize );
}
else
{
const QDateTime minDate = QwtDate::floor( from, intvType );
const QDateTime maxDate = QwtDate::ceil( to, intvType );
scaleDiv = buildScaleDiv( minDate, maxDate,
maxMajorSteps, maxMinorSteps, intvType );
// scaleDiv has been calculated from an extended interval
// adjusted to the step size. We have to shrink it again.
scaleDiv = scaleDiv.bounded( min, max );
}
if ( x1 > x2 )
scaleDiv.invert();
return scaleDiv;
}
