void WindPlot::updatePlot()
{
clearPlottables();
clearItems();
// Return now if plot empty
if (mMainWindow->dataSize() == 0) return;
double lower = mMainWindow->rangeLower();
double upper = mMainWindow->rangeUpper();
QVector< double > t, x, y;
double xMin, xMax;
double yMin, yMax;
int start = mMainWindow->findIndexBelowT(lower) + 1;
int end = mMainWindow->findIndexAboveT(upper);
bool first = true;
for (int i = start; i < end; ++i)
{
const DataPoint &dp = mMainWindow->dataPoint(i);
t.append(dp.t);
if (mMainWindow->units() == PlotValue::Metric)
{
x.append(dp.velE * MPS_TO_KMH);
y.append(dp.velN * MPS_TO_KMH);
}
else
{
x.append(dp.velE * MPS_TO_MPH);
y.append(dp.velN * MPS_TO_MPH);
}
if (first)
{
xMin = xMax = x.back();
yMin = yMax = y.back();
first = false;
}
else
{
if (x.back() < xMin) xMin = x.back();
if (x.back() > xMax) xMax = x.back();
if (y.back() < yMin) yMin = y.back();
if (y.back() > yMax) yMax = y.back();
}
}
QCPCurve *curve = new QCPCurve(xAxis, yAxis);
curve->setData(t, x, y);
curve->setPen(QPen(Qt::lightGray, mMainWindow->lineThickness()));
setViewRange(xMin, xMax, yMin, yMax);
if (mMainWindow->markActive())
{
const DataPoint &dpEnd = mMainWindow->interpolateDataT(mMainWindow->markEnd());
t.clear();
x.clear();
y.clear();
QVector< double > xMark, yMark;
if (mMainWindow->units() == PlotValue::Metric)
{
xMark.append(dpEnd.velE * MPS_TO_KMH);
yMark.append(dpEnd.velN * MPS_TO_KMH);
}
else
{
xMark.append(dpEnd.velE * MPS_TO_MPH);
yMark.append(dpEnd.velN * MPS_TO_MPH);
}
QCPGraph *graph = addGraph();
graph->setData(xMark, yMark);
graph->setPen(QPen(Qt::black, mMainWindow->lineThickness()));
graph->setLineStyle(QCPGraph::lsNone);
graph->setScatterStyle(QCPScatterStyle::ssDisc);
}
updateWind(start, end);
QVector< double > xMark, yMark;
if (mMainWindow->units() == PlotValue::Metric)
{
xMark.append(mWindE * MPS_TO_KMH);
yMark.append(mWindN * MPS_TO_KMH);
}
else
{
xMark.append(mWindE * MPS_TO_MPH);
yMark.append(mWindN * MPS_TO_MPH);
}
QCPGraph *graph = addGraph();
graph->setData(xMark, yMark);
graph->setPen(QPen(Qt::red, mMainWindow->lineThickness()));
graph->setLineStyle(QCPGraph::lsNone);
graph->setScatterStyle(QCPScatterStyle::ssDisc);
const double x0 = mWindE;
const double y0 = mWindN;
const double r = mVelAircraft;
QVector< double > tCircle, xCircle, yCircle;
for (int i = 0; i <= 100; ++i)
{
tCircle.append(i);
const double x = x0 + r * cos((double) i / 100 * 2 * M_PI);
const double y = y0 + r * sin((double) i / 100 * 2 * M_PI);
if (mMainWindow->units() == PlotValue::Metric)
{
xCircle.append(x * MPS_TO_KMH);
yCircle.append(y * MPS_TO_KMH);
}
else
{
xCircle.append(x * MPS_TO_MPH);
yCircle.append(y * MPS_TO_MPH);
}
}
curve = new QCPCurve(xAxis, yAxis);
curve->setData(tCircle, xCircle, yCircle);
curve->setPen(QPen(Qt::red, mMainWindow->lineThickness()));
// Add label to show best fit
QCPItemText *textLabel = new QCPItemText(this);
const double factor = (mMainWindow->units() == PlotValue::Metric) ? MPS_TO_KMH : MPS_TO_MPH;
const QString units = (mMainWindow->units() == PlotValue::Metric) ? "km/h" : "mph";
double direction = atan2(-mWindE, -mWindN) / M_PI * 180.0;
if (direction < 0) direction += 360.0;
QPainter painter(this);
double mmPerPix = (double) painter.device()->widthMM() / painter.device()->width();
double xRatioPerPix = 1.0 / axisRect()->width();
double xRatioPerMM = xRatioPerPix / mmPerPix;
double yRatioPerPix = 1.0 / axisRect()->height();
double yRatioPerMM = yRatioPerPix / mmPerPix;
textLabel->setPositionAlignment(Qt::AlignBottom|Qt::AlignRight);
textLabel->setTextAlignment(Qt::AlignRight);
textLabel->position->setType(QCPItemPosition::ptAxisRectRatio);
textLabel->position->setCoords(1 - 5 * xRatioPerMM,
1 - 5 * yRatioPerMM);
textLabel->setText(
QString("Wind speed = %1 %2\nWind direction = %3 deg\nAircraft speed = %4 %5")
.arg(sqrt(mWindE * mWindE + mWindN * mWindN) * factor)
.arg(units)
.arg(direction)
.arg(mVelAircraft * factor)
.arg(units));
replot();
}
void AdvancedQCustomPlot::wheelEvent(QWheelEvent *event)
{
if (event->modifiers() == Qt::ShiftModifier){
axisRect()->setRangeZoom(Qt::Vertical);
} else if (event->modifiers() == Qt::ControlModifier){
axisRect()->setRangeZoom(Qt::Horizontal);
} else {
axisRect()->setRangeZoom(Qt::Vertical | Qt::Horizontal);
}
isZoomed_ = true;
QCustomPlot::wheelEvent(event);
}
QCustomPlotExt::QCustomPlotExt(QWidget *parent) :
QCustomPlot(parent),
marker(NULL)
{
clearExt();
setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
axisRect()->setRangeDrag(Qt::Horizontal | Qt::Vertical);
axisRect()->setRangeZoom(Qt::Horizontal | Qt::Vertical);
connect(this, SIGNAL(mouseWheel(QWheelEvent*)), this, SLOT(mouseWheel(QWheelEvent*)));
connect(xAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(xAxisRangeChanged(QCPRange)));
connect(yAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(yAxisRangeChanged(QCPRange)));
}
Graph::Graph(QWidget *parent)
: QWidget(parent)
, mPlotArea_(0)
, mHBar_(0)
, mVBar_(0)
, mTitle_("Title")
, mGridX_(0)
, mGridY_(0)
, mDragging_(false)
, mMarker_(0)
, mLabel_(0)
{
ui.setupUi(this);
mPaintBuffer_ = QPixmap(size());
mPlotArea_ = new QFrame(this);
mPlotArea_->setGeometry(axisRect().adjusted(3, 0, 0, -3));
mPlotArea_->setFrameStyle(QFrame::Sunken);
mPlotArea_->setFrameShape(QFrame::Panel);
mPlotArea_->setLineWidth(2);
GraphLayer* axisLayer = new GraphLayer();
GraphAxis* axisX = new GraphAxis(axisRect(), GraphAxis::AT_BOTTOM);
axisX->setLabel("sec");
GraphAxis* axisY = new GraphAxis(axisRect(), GraphAxis::AT_LEFT);
axisY->setLabel("pressure");
axisX->setLayer(axisLayer);
axisY->setLayer(axisLayer);
mAxisXs_.append(axisX);
mAxisYs_.append(axisY);
mLayers_.append(axisLayer);
GraphLayer* gridLayer = new GraphLayer();
mGridX_ = new GraphGrid(mAxisXs_);
mGridY_ = new GraphGrid(mAxisYs_);
mGridX_->setLayer(gridLayer);
mGridY_->setLayer(gridLayer);
mLayers_.append(gridLayer);
GraphLayer* markerLayer = new GraphLayer();
mMarker_ = new GraphMarker(axisRect());
mMarker_->setLayer(markerLayer);
mLayers_.append(markerLayer);
mHBar_ = new GraphBar(this, *mAxisXs_.first());
connect(mHBar_, SIGNAL(valueChanged(int)), this, SLOT(hBarValueChanged(int)));
mVBar_ = new GraphBar(this, *mAxisYs_.first());
connect(mVBar_, SIGNAL(valueChanged(int)), this, SLOT(vBarValueChanged(int)));
mLabel_ = new GraphLabel(this, axisRect());
}
void WindPlot::setViewRange(
double xMin,
double xMax,
double yMin,
double yMax)
{
QPainter painter(this);
double xMMperPix = (double) painter.device()->widthMM() / painter.device()->width();
double yMMperPix = (double) painter.device()->heightMM() / painter.device()->height();
QRect rect = axisRect()->rect();
double xSpan = (xMax - xMin) * 1.2;
double ySpan = (yMax - yMin) * 1.2;
double xScale = xSpan / rect.width() / xMMperPix;
double yScale = ySpan / rect.height() / yMMperPix;
double scale = qMax(xScale, yScale);
double xMid = (xMin + xMax) / 2;
double yMid = (yMin + yMax) / 2;
xMin = xMid - rect.width() * xMMperPix * scale / 2;
xMax = xMid + rect.width() * xMMperPix * scale / 2;
yMin = yMid - rect.height() * yMMperPix * scale / 2;
yMax = yMid + rect.height() * yMMperPix * scale / 2;
xAxis->setRange(xMin, xMax);
yAxis->setRange(yMin, yMax);
}
void TgChart::mouseMoveEvent(QMouseEvent * event)
{
if (mRubberBand->isVisible())
{
mRubberBand->setGeometry(QRect(mOrigin, QPoint(event->pos().x(),axisRect()->bottomRight().y())).normalized());
}
QCustomPlot::mouseMoveEvent(event);
}
void QCustomPlotExt::mouseWheel(QWheelEvent *event)
{
if (event->modifiers()& Qt::ShiftModifier)
{
axisRect()->setRangeZoom(Qt::Vertical);
}
else if (event->delta() < 0 && xAxisRangeOrg == xAxis->range())
{
axisRect()->setRangeZoom(0);
}
else
{
if (event->modifiers()& Qt::ControlModifier)
axisRect()->setRangeZoom(Qt::Horizontal);
else
axisRect()->setRangeZoom(Qt::Horizontal | Qt::Vertical);
}
}
void LiftDragPlot::mousePressEvent(
QMouseEvent *event)
{
if (axisRect()->rect().contains(event->pos()))
{
mBeginPos = event->pos();
}
QCustomPlot::mousePressEvent(event);
}
DrawInteraction::DrawInteraction(QWidget *parent) :
QCustomPlot(parent)
{
resize(600,400);
statusBar = new QStatusBar(this);
srand(QDateTime::currentDateTime().toTime_t());
setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectAxes |
QCP::iSelectLegend | QCP::iSelectPlottables);
xAxis->setRange(-8, 8);
yAxis->setRange(-5, 5);
axisRect()->setupFullAxesBox();
plotLayout()->insertRow(0);
plotLayout()->addElement(0, 0, new QCPPlotTitle(this, "Interaction Example"));
xAxis->setLabel("x Axis");
yAxis->setLabel("y Axis");
legend->setVisible(true);
QFont legendFont = font();
legendFont.setPointSize(10);
legend->setFont(legendFont);
legend->setSelectedFont(legendFont);
legend->setSelectableParts(QCPLegend::spItems); // legend box shall not be selectable, only legend items
addRandomGraph();
addRandomGraph();
addRandomGraph();
addRandomGraph();
// connect slot that ties some axis selections together (especially opposite axes):
connect(this, SIGNAL(selectionChangedByUser()), this, SLOT(selectionChanged()));
// connect slots that takes care that when an axis is selected, only that direction can be dragged and zoomed:
connect(this, SIGNAL(mousePress(QMouseEvent*)), this, SLOT(mousePress()));
connect(this, SIGNAL(mouseWheel(QWheelEvent*)), this, SLOT(mouseWheel()));
// make bottom and left axes transfer their ranges to top and right axes:
connect(xAxis, SIGNAL(rangeChanged(QCPRange)), xAxis2, SLOT(setRange(QCPRange)));
connect(yAxis, SIGNAL(rangeChanged(QCPRange)), yAxis2, SLOT(setRange(QCPRange)));
// connect some interaction slots:
connect(this, SIGNAL(titleDoubleClick(QMouseEvent*,QCPPlotTitle*)), this, SLOT(titleDoubleClick(QMouseEvent*,QCPPlotTitle*)));
connect(this, SIGNAL(axisDoubleClick(QCPAxis*,QCPAxis::SelectablePart,QMouseEvent*)), this, SLOT(axisLabelDoubleClick(QCPAxis*,QCPAxis::SelectablePart)));
connect(this, SIGNAL(legendDoubleClick(QCPLegend*,QCPAbstractLegendItem*,QMouseEvent*)), this, SLOT(legendDoubleClick(QCPLegend*,QCPAbstractLegendItem*)));
// connect slot that shows a message in the status bar when a graph is clicked:
connect(this, SIGNAL(plottableClick(QCPAbstractPlottable*,QMouseEvent*)), this, SLOT(graphClicked(QCPAbstractPlottable*)));
// setup policy and connect slot for context menu popup:
setContextMenuPolicy(Qt::CustomContextMenu);
connect(this, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(contextMenuRequest(QPoint)));
}
void QCustomPlotExt::mousePress(QMouseEvent* event)
{
if (event->button() == Qt::LeftButton)
{
if (marker)
{
if(axisRect()->rect().contains(event->pos()))
setMarkerValue(xAxis->pixelToCoord(event->x()));
}
}
}
void TgChart::mousePressEvent(QMouseEvent * event)
{
if (mZoomMode)
{
if ( event->button() == Qt::MiddleButton)
{
mOrigin = QPoint(event->pos().x(),axisRect()->topLeft().y());
mRubberBand->setGeometry(QRect(mOrigin,
QSize()));
mRubberBand->show();
}
}
QCustomPlot::mousePressEvent(event);
}
void LiftDragPlot::updatePlot()
{
clearPlottables();
clearItems();
xAxis->setLabel(tr("Drag Coefficient"));
yAxis->setLabel(tr("Lift Coefficient"));
double lower = mMainWindow->rangeLower();
double upper = mMainWindow->rangeUpper();
QVector< double > t, x, y;
double xMin, xMax;
double yMin, yMax;
int start = mMainWindow->findIndexBelowT(lower) + 1;
int end = mMainWindow->findIndexAboveT(upper);
double s10 = 0, s01 = 0, s20 = 0, s11 = 0;
double s21 = 0, s30 = 0, s40 = 0;
bool first = true;
for (int i = start; i < end; ++i)
{
const DataPoint &dp = mMainWindow->dataPoint(i);
t.append(dp.t);
x.append(dp.drag);
y.append(dp.lift);
if (first)
{
xMax = x.back();
yMax = y.back();
first = false;
}
else
{
if (x.back() > xMax) xMax = x.back();
if (y.back() > yMax) yMax = y.back();
}
s10 += dp.lift;
s01 += dp.drag;
s20 += dp.lift * dp.lift;
s11 += dp.lift * dp.drag;
s21 += dp.lift * dp.lift * dp.drag;
s30 += dp.lift * dp.lift * dp.lift;
s40 += dp.lift * dp.lift * dp.lift * dp.lift;
}
QCPCurve *curve = new QCPCurve(xAxis, yAxis);
curve->setData(t, x, y);
curve->setPen(QPen(Qt::lightGray, mMainWindow->lineThickness()));
curve->setLineStyle(QCPCurve::lsNone);
curve->setScatterStyle(QCPScatterStyle::ssDisc);
addPlottable(curve);
setViewRange(xMax, yMax);
// Update plot limits
xMin = xAxis->range().lower;
xMax = xAxis->range().upper;
yMin = yAxis->range().lower;
yMax = yAxis->range().upper;
if (mMainWindow->markActive())
{
int i1 = mMainWindow->findIndexBelowT(mMainWindow->markEnd()) + 1;
int i2 = mMainWindow->findIndexAboveT(mMainWindow->markEnd()) - 1;
const DataPoint &dp1 = mMainWindow->dataPoint(i1);
const DataPoint &dp2 = mMainWindow->dataPoint(i2);
QVector< double > xMark, yMark;
if (mMainWindow->markEnd() - dp1.t < dp2.t - mMainWindow->markEnd())
{
xMark.append(dp1.drag);
yMark.append(dp1.lift);
}
else
{
xMark.append(dp2.drag);
yMark.append(dp2.lift);
}
QCPGraph *graph = addGraph();
graph->setData(xMark, yMark);
graph->setPen(QPen(Qt::black, mMainWindow->lineThickness()));
graph->setLineStyle(QCPGraph::lsNone);
graph->setScatterStyle(QCPScatterStyle::ssDisc);
}
// x = ay^2 + c
const double m = 1 / mMainWindow->maxLD();
const double c = mMainWindow->minDrag();
const double a = m * m / (4 * c);
// Draw tangent line
const double yt = sqrt(c / a);
if (a != 0)
{
x.clear();
y.clear();
x << m * yMin << m * yMax;
y << yMin << yMax;
QCPGraph *graph = addGraph();
graph->setData(x, y);
graph->setPen(QPen(Qt::blue, mMainWindow->lineThickness(), Qt::DashLine));
}
// Draw minimum drag
x.clear();
y.clear();
x << mMainWindow->minDrag() << mMainWindow->minDrag();
y << yMin << yMax;
QCPGraph *graph = addGraph();
graph->setData(x, y);
graph->setPen(QPen(Qt::blue, mMainWindow->lineThickness(), Qt::DashLine));
// Draw maximum lift
x.clear();
y.clear();
x << xMin << xMax;
y << mMainWindow->maxLift() << mMainWindow->maxLift();
graph = addGraph();
graph->setData(x, y);
graph->setPen(QPen(Qt::blue, mMainWindow->lineThickness(), Qt::DashLine));
// Draw saved curve
t.clear();
x.clear();
y.clear();
for (int i = 0; i <= 100; ++i)
{
const double yy = yMin + (yMax - yMin) / 100 * i;
t.append(yy);
x.append(a * yy * yy + c);
y.append(yy);
}
curve = new QCPCurve(xAxis, yAxis);
curve->setData(t, x, y);
curve->setPen(QPen(Qt::red, mMainWindow->lineThickness()));
addPlottable(curve);
// Draw dot at maximum L/D
x.clear();
y.clear();
x << a * yt * yt + c;
y << yt;
graph = addGraph();
graph->setData(x, y);
graph->setPen(QPen(Qt::red, mMainWindow->lineThickness()));
graph->setLineStyle(QCPGraph::lsNone);
graph->setScatterStyle(QCPScatterStyle::ssDisc);
// Add label to show equation for saved curve
QCPItemText *textLabel = new QCPItemText(this);
addItem(textLabel);
QPainter painter(this);
double mmPerPix = (double) painter.device()->widthMM() / painter.device()->width();
double xRatioPerPix = 1.0 / axisRect()->width();
double xRatioPerMM = xRatioPerPix / mmPerPix;
double yRatioPerPix = 1.0 / axisRect()->height();
double yRatioPerMM = yRatioPerPix / mmPerPix;
textLabel->setPositionAlignment(Qt::AlignBottom|Qt::AlignRight);
textLabel->setTextAlignment(Qt::AlignRight);
textLabel->position->setType(QCPItemPosition::ptAxisRectRatio);
textLabel->position->setCoords(1 - 5 * xRatioPerMM,
1 - 5 * yRatioPerMM);
textLabel->setText(
QString("Minimum drag = %1\nMaximum lift = %2\nMaximum L/D = %3")
.arg(fabs(c))
.arg(mMainWindow->maxLift())
.arg(1/ m));
replot();
}
DrawFinancialChart::DrawFinancialChart(QWidget *parent) :
QCustomPlot(parent)
{
resize(600,400);
legend->setVisible(true);
// generate two sets of random walk data (one for candlestick and one for ohlc chart):
int n = 500;
QVector<double> time(n), value1(n), value2(n);
QDateTime start = QDateTime(QDate(2014, 6, 11));
start.setTimeSpec(Qt::UTC);
double startTime = start.toTime_t();
double binSize = 3600*24; // bin data in 1 day intervals
time[0] = startTime;
value1[0] = 60;
value2[0] = 20;
qsrand(9);
for (int i=1; i<n; ++i)
{
time[i] = startTime + 3600*i;
value1[i] = value1[i-1] + (qrand()/(double)RAND_MAX-0.5)*10;
value2[i] = value2[i-1] + (qrand()/(double)RAND_MAX-0.5)*3;
}
// create candlestick chart:
QCPFinancial *candlesticks = new QCPFinancial(xAxis, yAxis);
addPlottable(candlesticks);
QCPFinancialDataMap data1 = QCPFinancial::timeSeriesToOhlc(time, value1, binSize, startTime);
candlesticks->setName("Candlestick");
candlesticks->setChartStyle(QCPFinancial::csCandlestick);
candlesticks->setData(&data1, true);
candlesticks->setWidth(binSize*0.9);
candlesticks->setTwoColored(true);
candlesticks->setBrushPositive(QColor(245, 245, 245));
candlesticks->setBrushNegative(QColor(0, 0, 0));
candlesticks->setPenPositive(QPen(QColor(0, 0, 0)));
candlesticks->setPenNegative(QPen(QColor(0, 0, 0)));
// create ohlc chart:
QCPFinancial *ohlc = new QCPFinancial(xAxis, yAxis);
addPlottable(ohlc);
QCPFinancialDataMap data2 = QCPFinancial::timeSeriesToOhlc(time, value2, binSize/3.0, startTime); // divide binSize by 3 just to make the ohlc bars a bit denser
ohlc->setName("OHLC");
ohlc->setChartStyle(QCPFinancial::csOhlc);
ohlc->setData(&data2, true);
ohlc->setWidth(binSize*0.2);
ohlc->setTwoColored(true);
// create bottom axis rect for volume bar chart:
QCPAxisRect *volumeAxisRect = new QCPAxisRect(this);
plotLayout()->addElement(1, 0, volumeAxisRect);
volumeAxisRect->setMaximumSize(QSize(QWIDGETSIZE_MAX, 100));
volumeAxisRect->axis(QCPAxis::atBottom)->setLayer("axes");
volumeAxisRect->axis(QCPAxis::atBottom)->grid()->setLayer("grid");
// bring bottom and main axis rect closer together:
plotLayout()->setRowSpacing(0);
volumeAxisRect->setAutoMargins(QCP::msLeft|QCP::msRight|QCP::msBottom);
volumeAxisRect->setMargins(QMargins(0, 0, 0, 0));
// create two bar plottables, for positive (green) and negative (red) volume bars:
QCPBars *volumePos = new QCPBars(volumeAxisRect->axis(QCPAxis::atBottom), volumeAxisRect->axis(QCPAxis::atLeft));
QCPBars *volumeNeg = new QCPBars(volumeAxisRect->axis(QCPAxis::atBottom), volumeAxisRect->axis(QCPAxis::atLeft));
for (int i=0; i<n/5; ++i)
{
int v = qrand()%20000+qrand()%20000+qrand()%20000-10000*3;
(v < 0 ? volumeNeg : volumePos)->addData(startTime+3600*5.0*i, qAbs(v)); // add data to either volumeNeg or volumePos, depending on sign of v
}
setAutoAddPlottableToLegend(false);
addPlottable(volumePos);
addPlottable(volumeNeg);
volumePos->setWidth(3600*4);
volumePos->setPen(Qt::NoPen);
volumePos->setBrush(QColor(100, 180, 110));
volumeNeg->setWidth(3600*4);
volumeNeg->setPen(Qt::NoPen);
volumeNeg->setBrush(QColor(180, 90, 90));
// interconnect x axis ranges of main and bottom axis rects:
connect(xAxis, SIGNAL(rangeChanged(QCPRange)), volumeAxisRect->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange)));
connect(volumeAxisRect->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), xAxis, SLOT(setRange(QCPRange)));
// configure axes of both main and bottom axis rect:
volumeAxisRect->axis(QCPAxis::atBottom)->setAutoTickStep(false);
volumeAxisRect->axis(QCPAxis::atBottom)->setTickStep(3600*24*4); // 4 day tickstep
volumeAxisRect->axis(QCPAxis::atBottom)->setTickLabelType(QCPAxis::ltDateTime);
volumeAxisRect->axis(QCPAxis::atBottom)->setDateTimeSpec(Qt::UTC);
volumeAxisRect->axis(QCPAxis::atBottom)->setDateTimeFormat("dd. MMM");
volumeAxisRect->axis(QCPAxis::atBottom)->setTickLabelRotation(15);
volumeAxisRect->axis(QCPAxis::atLeft)->setAutoTickCount(3);
xAxis->setBasePen(Qt::NoPen);
xAxis->setTickLabels(false);
xAxis->setTicks(false); // only want vertical grid in main axis rect, so hide xAxis backbone, ticks, and labels
xAxis->setAutoTickStep(false);
xAxis->setTickStep(3600*24*4); // 4 day tickstep
rescaleAxes();
xAxis->scaleRange(1.025, xAxis->range().center());
yAxis->scaleRange(1.1, yAxis->range().center());
// make axis rects' left side line up:
QCPMarginGroup *group = new QCPMarginGroup(this);
axisRect()->setMarginGroup(QCP::msLeft|QCP::msRight, group);
volumeAxisRect->setMarginGroup(QCP::msLeft|QCP::msRight, group);
}