109 lines
5.1 KiB
C++
109 lines
5.1 KiB
C++
#include "frmfinancial.h"
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#include "ui_frmfinancial.h"
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#include "qdebug.h"
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frmFinancial::frmFinancial(QWidget *parent) : QWidget(parent), ui(new Ui::frmFinancial)
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{
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ui->setupUi(this);
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this->initForm();
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}
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frmFinancial::~frmFinancial()
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{
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delete ui;
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}
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void frmFinancial::initForm()
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{
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ui->customPlot->legend->setVisible(true);
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// generate two sets of random walk data (one for candlestick and one for ohlc chart):
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int n = 500;
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QVector<double> time(n), value1(n), value2(n);
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QDateTime start(QDate(2022, 1, 1), QTime(0, 0));
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start.setTimeSpec(Qt::UTC);
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double startTime = start.toMSecsSinceEpoch() / 1000.0;
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double binSize = 3600 * 24; // bin data in 1 day intervals
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time[0] = startTime;
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value1[0] = 60;
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value2[0] = 20;
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std::srand(9);
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for (int i = 1; i < n; ++i) {
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time[i] = startTime + 3600 * i;
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value1[i] = value1[i - 1] + (std::rand() / (double)RAND_MAX - 0.5) * 10;
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value2[i] = value2[i - 1] + (std::rand() / (double)RAND_MAX - 0.5) * 3;
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}
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// create candlestick chart:
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QCPFinancial *candlesticks = new QCPFinancial(ui->customPlot->xAxis, ui->customPlot->yAxis);
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candlesticks->setName("Candlestick");
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candlesticks->setChartStyle(QCPFinancial::csCandlestick);
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candlesticks->data()->set(QCPFinancial::timeSeriesToOhlc(time, value1, binSize, startTime));
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candlesticks->setWidth(binSize * 0.9);
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candlesticks->setTwoColored(true);
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candlesticks->setBrushPositive(QColor(245, 245, 245));
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candlesticks->setBrushNegative(QColor(40, 40, 40));
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candlesticks->setPenPositive(QPen(QColor(0, 0, 0)));
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candlesticks->setPenNegative(QPen(QColor(0, 0, 0)));
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// create ohlc chart:
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QCPFinancial *ohlc = new QCPFinancial(ui->customPlot->xAxis, ui->customPlot->yAxis);
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ohlc->setName("OHLC");
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ohlc->setChartStyle(QCPFinancial::csOhlc);
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ohlc->data()->set(QCPFinancial::timeSeriesToOhlc(time, value2, binSize / 3.0, startTime)); // divide binSize by 3 just to make the ohlc bars a bit denser
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ohlc->setWidth(binSize * 0.2);
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ohlc->setTwoColored(true);
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// create bottom axis rect for volume bar chart:
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QCPAxisRect *volumeAxisRect = new QCPAxisRect(ui->customPlot);
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ui->customPlot->plotLayout()->addElement(1, 0, volumeAxisRect);
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volumeAxisRect->setMaximumSize(QSize(QWIDGETSIZE_MAX, 100));
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volumeAxisRect->axis(QCPAxis::atBottom)->setLayer("axes");
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volumeAxisRect->axis(QCPAxis::atBottom)->grid()->setLayer("grid");
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// bring bottom and main axis rect closer together:
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ui->customPlot->plotLayout()->setRowSpacing(0);
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volumeAxisRect->setAutoMargins(QCP::msLeft | QCP::msRight | QCP::msBottom);
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volumeAxisRect->setMargins(QMargins(0, 0, 0, 0));
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// create two bar plottables, for positive (green) and negative (red) volume bars:
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ui->customPlot->setAutoAddPlottableToLegend(false);
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QCPBars *volumePos = new QCPBars(volumeAxisRect->axis(QCPAxis::atBottom), volumeAxisRect->axis(QCPAxis::atLeft));
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QCPBars *volumeNeg = new QCPBars(volumeAxisRect->axis(QCPAxis::atBottom), volumeAxisRect->axis(QCPAxis::atLeft));
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for (int i = 0; i < n / 5; ++i) {
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int v = std::rand() % 20000 + std::rand() % 20000 + std::rand() % 20000 - 10000 * 3;
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(v < 0 ? volumeNeg : volumePos)->addData(startTime + 3600 * 5.0 * i, qAbs(v)); // add data to either volumeNeg or volumePos, depending on sign of v
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}
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volumePos->setWidth(3600 * 4);
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volumePos->setPen(Qt::NoPen);
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volumePos->setBrush(QColor(100, 180, 110));
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volumeNeg->setWidth(3600 * 4);
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volumeNeg->setPen(Qt::NoPen);
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volumeNeg->setBrush(QColor(180, 90, 90));
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// interconnect x axis ranges of main and bottom axis rects:
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connect(ui->customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), volumeAxisRect->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange)));
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connect(volumeAxisRect->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), ui->customPlot->xAxis, SLOT(setRange(QCPRange)));
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// configure axes of both main and bottom axis rect:
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QSharedPointer<QCPAxisTickerDateTime> dateTimeTicker(new QCPAxisTickerDateTime);
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dateTimeTicker->setDateTimeSpec(Qt::UTC);
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dateTimeTicker->setDateTimeFormat("dd. MMMM");
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volumeAxisRect->axis(QCPAxis::atBottom)->setTicker(dateTimeTicker);
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volumeAxisRect->axis(QCPAxis::atBottom)->setTickLabelRotation(15);
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ui->customPlot->xAxis->setBasePen(Qt::NoPen);
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ui->customPlot->xAxis->setTickLabels(false);
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ui->customPlot->xAxis->setTicks(false); // only want vertical grid in main axis rect, so hide xAxis backbone, ticks, and labels
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ui->customPlot->xAxis->setTicker(dateTimeTicker);
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ui->customPlot->rescaleAxes();
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ui->customPlot->xAxis->scaleRange(1.025, ui->customPlot->xAxis->range().center());
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ui->customPlot->yAxis->scaleRange(1.1, ui->customPlot->yAxis->range().center());
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// make axis rects' left side line up:
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QCPMarginGroup *group = new QCPMarginGroup(ui->customPlot);
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ui->customPlot->axisRect()->setMarginGroup(QCP::msLeft | QCP::msRight, group);
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volumeAxisRect->setMarginGroup(QCP::msLeft | QCP::msRight, group);
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ui->customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
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}
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