qt_demoe/third/qcustomplotdemo/frmexample/frmstyled.cpp

#include "frmstyled.h"
#include "ui_frmstyled.h"
#include "qdebug.h"

frmStyled::frmStyled(QWidget *parent) : QWidget(parent), ui(new Ui::frmStyled)
{
    ui->setupUi(this);
    this->initForm();
}

frmStyled::~frmStyled()
{
    delete ui;
}

void frmStyled::initForm()
{
    // prepare data:
    QVector<double> x1(20), y1(20);
    QVector<double> x2(100), y2(100);
    QVector<double> x3(20), y3(20);
    QVector<double> x4(20), y4(20);

    for (int i = 0; i < x1.size(); ++i) {
        x1[i] = i / (double)(x1.size() - 1) * 10;
        y1[i] = qCos(x1[i] * 0.8 + qSin(x1[i] * 0.16 + 1.0)) * qSin(x1[i] * 0.54) + 1.4;
    }

    for (int i = 0; i < x2.size(); ++i) {
        x2[i] = i / (double)(x2.size() - 1) * 10;
        y2[i] = qCos(x2[i] * 0.85 + qSin(x2[i] * 0.165 + 1.1)) * qSin(x2[i] * 0.50) + 1.7;
    }

    for (int i = 0; i < x3.size(); ++i) {
        x3[i] = i / (double)(x3.size() - 1) * 10;
        y3[i] = 0.05 + 3 * (0.5 + qCos(x3[i] * x3[i] * 0.2 + 2) * 0.5) / (double)(x3[i] + 0.7) + std::rand() / (double)RAND_MAX * 0.01;
    }

    for (int i = 0; i < x4.size(); ++i) {
        x4[i] = x3[i];
        y4[i] = (0.5 - y3[i]) + ((x4[i] - 2) * (x4[i] - 2) * 0.02);
    }

    // create and configure plottables:
    QCPGraph *graph1 = ui->customPlot->addGraph();
    graph1->setData(x1, y1);
    graph1->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssCircle, QPen(Qt::black, 1.5), QBrush(Qt::white), 9));
    graph1->setPen(QPen(QColor(120, 120, 120), 2));

    QCPGraph *graph2 = ui->customPlot->addGraph();
    graph2->setData(x2, y2);
    graph2->setPen(Qt::NoPen);
    graph2->setBrush(QColor(200, 200, 200, 20));
    graph2->setChannelFillGraph(graph1);

    QCPBars *bars1 = new QCPBars(ui->customPlot->xAxis, ui->customPlot->yAxis);
    bars1->setWidth(9 / (double)x3.size());
    bars1->setData(x3, y3);
    bars1->setPen(Qt::NoPen);
    bars1->setBrush(QColor(10, 140, 70, 160));

    QCPBars *bars2 = new QCPBars(ui->customPlot->xAxis, ui->customPlot->yAxis);
    bars2->setWidth(9 / (double)x4.size());
    bars2->setData(x4, y4);
    bars2->setPen(Qt::NoPen);
    bars2->setBrush(QColor(10, 100, 50, 70));
    bars2->moveAbove(bars1);

    // move bars above graphs and grid below bars:
    ui->customPlot->addLayer("abovemain", ui->customPlot->layer("main"), QCustomPlot::limAbove);
    ui->customPlot->addLayer("belowmain", ui->customPlot->layer("main"), QCustomPlot::limBelow);
    graph1->setLayer("abovemain");
    ui->customPlot->xAxis->grid()->setLayer("belowmain");
    ui->customPlot->yAxis->grid()->setLayer("belowmain");

    // set some pens, brushes and backgrounds:
    ui->customPlot->xAxis->setBasePen(QPen(Qt::white, 1));
    ui->customPlot->yAxis->setBasePen(QPen(Qt::white, 1));
    ui->customPlot->xAxis->setTickPen(QPen(Qt::white, 1));
    ui->customPlot->yAxis->setTickPen(QPen(Qt::white, 1));
    ui->customPlot->xAxis->setSubTickPen(QPen(Qt::white, 1));
    ui->customPlot->yAxis->setSubTickPen(QPen(Qt::white, 1));
    ui->customPlot->xAxis->setTickLabelColor(Qt::white);
    ui->customPlot->yAxis->setTickLabelColor(Qt::white);

    ui->customPlot->xAxis->grid()->setPen(QPen(QColor(140, 140, 140), 1, Qt::DotLine));
    ui->customPlot->yAxis->grid()->setPen(QPen(QColor(140, 140, 140), 1, Qt::DotLine));
    ui->customPlot->xAxis->grid()->setSubGridPen(QPen(QColor(80, 80, 80), 1, Qt::DotLine));
    ui->customPlot->yAxis->grid()->setSubGridPen(QPen(QColor(80, 80, 80), 1, Qt::DotLine));
    ui->customPlot->xAxis->grid()->setSubGridVisible(true);
    ui->customPlot->yAxis->grid()->setSubGridVisible(true);
    ui->customPlot->xAxis->grid()->setZeroLinePen(Qt::NoPen);
    ui->customPlot->yAxis->grid()->setZeroLinePen(Qt::NoPen);

    ui->customPlot->xAxis->setUpperEnding(QCPLineEnding::esSpikeArrow);
    ui->customPlot->yAxis->setUpperEnding(QCPLineEnding::esSpikeArrow);

    QLinearGradient plotGradient;
    plotGradient.setStart(0, 0);
    plotGradient.setFinalStop(0, 350);
    plotGradient.setColorAt(0, QColor(80, 80, 80));
    plotGradient.setColorAt(1, QColor(50, 50, 50));
    ui->customPlot->setBackground(plotGradient);

    QLinearGradient axisRectGradient;
    axisRectGradient.setStart(0, 0);
    axisRectGradient.setFinalStop(0, 350);
    axisRectGradient.setColorAt(0, QColor(80, 80, 80));
    axisRectGradient.setColorAt(1, QColor(30, 30, 30));
    ui->customPlot->axisRect()->setBackground(axisRectGradient);

    ui->customPlot->rescaleAxes();
    ui->customPlot->yAxis->setRange(0, 2);
    ui->customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
}