QAreaSeries相关内容

针对全国二月份下旬疫情数据，简单学习QAreaSeries相关内容。
效果图

头文件

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QtCharts/QChart>
using namespace QtCharts;

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private:
    void createQAreaSeries();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

cpp文件

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QAreaSeries>
#include <QLineSeries>
#include <QValueAxis>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
    QStringList headText = QStringList() << QStringLiteral("日期") << QStringLiteral("新增确诊") << QStringLiteral("新增疑似")
                                         << QStringLiteral("新增治愈") << QStringLiteral("新增死亡")<< QStringLiteral("现有确诊") << QStringLiteral("累计确诊");
    ui->tableWidget->setHorizontalHeaderLabels(headText);
    for (int i = 0; i < ui->tableWidget->rowCount(); i++)
    {
        QTableWidgetItem *itemNowDefinite = ui->tableWidget->item(i, 5);
        itemNowDefinite->setBackground(QBrush(Qt::yellow));
        QTableWidgetItem *itemAllDefinite = ui->tableWidget->item(i, 6);
        itemAllDefinite->setBackground(QBrush(Qt::red));
    }

    createQAreaSeries();
}

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

void MainWindow::createQAreaSeries()
{
    //基本设置
    ui->charViewQArea->setRenderHint(QPainter::Antialiasing);
    ui->charViewQArea->chart()->setTitle(QStringLiteral("QAreaSeries演示"));
    ui->charViewQArea->chart()->setTheme(QChart::ChartThemeBlueCerulean);
    //创建折线序列
    QLineSeries *lsNowDefinite = new QLineSeries;
    QLineSeries *lsAllDefinite = new QLineSeries;
    lsNowDefinite->setName(QStringLiteral("现有确诊"));
    lsAllDefinite->setName(QStringLiteral("累计确诊"));
    for (int i = 0; i < ui->tableWidget->rowCount(); i++)
    {
        int date = ui->tableWidget->item(i, 0)->text().toInt();
        lsNowDefinite->append(date, ui->tableWidget->item(i, 5)->text().toInt());
        lsAllDefinite->append(date, ui->tableWidget->item(i, 6)->text().toInt());
    }
    //创建面积图序列
    QAreaSeries *areaSeries = new QAreaSeries(lsAllDefinite, lsNowDefinite);
    areaSeries->setName(QStringLiteral("累计治愈面积图"));
    areaSeries->setPointsVisible(true);
    ui->charViewQArea->chart()->addSeries(areaSeries);
    //创建坐标轴
    QValueAxis *axisX = new QValueAxis;
    axisX->setRange(20, 29);
    axisX->setTitleText(QStringLiteral("日期"));
    axisX->setTickCount(10);
    axisX->setLabelFormat("%d");
    QValueAxis *axisY = new QValueAxis;
    axisY->setRange(35000, 80000);
    axisY->setTitleText(QStringLiteral("人数"));
    axisY->setLabelFormat("%d");
    ui->charViewQArea->chart()->setAxisX(axisX, areaSeries);
    ui->charViewQArea->chart()->setAxisY(axisY, areaSeries);
}