QT draws area chart QAreaSeries

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0. Create ui window:

Mainly drag oneHorizontal Layout

1. Create a Qchart object:

QChart *chart = new QChart();
chart->setTitle("面积图演示"); //设置表格标题

2. Create a QLineSeries object:

QLineSeries *series1 = new QLineSeries(chart);
series1->setName("A店铺接单数");
// 添加节点
series1->append(0,8);
series1->append(1,10);
series1->append(2,12);
series1->append(3,17);
series1->append(4,19);
series1->append(5,18);
series1->append(6,20);

QLineSeries *series2 = new QLineSeries(chart);
series2->setName("B店铺接单数");
series2->append(0,1);
series2->append(1,4);
series2->append(2,5);
series2->append(3,3);
series2->append(4,11);
series2->append(5,16);
series2->append(6,19);

3. Create a QAreaSeries object:

//（区域上限，区域下限）
QAreaSeries *area1 = new QAreaSeries(series1, 0);
QAreaSeries *area2 = new QAreaSeries(series2, series1);
area1->setName("A区域");
area2->setName("B区域");

4. Add QAreaSeries to QChart

chart->addSeries(area1);
chart->addSeries(area2);

5. Chart comprehensive effect settings:

//设置动画效果
chart->setAnimationOptions(QChart::AllAnimations);

chart->createDefaultAxes();//设置网格线
chart->axes(Qt::Horizontal).first()->setRange(0, 7);//设置x轴范围
chart->axes(Qt::Vertical).first()->setRange(0, 20);//设置y轴范围

// Add space to label to add space between labels and axis 在标签和轴之间加空格
QValueAxis *axisY = qobject_cast<QValueAxis*>(chart->axes(Qt::Vertical).first());
Q_ASSERT(axisY);
axisY->setLabelFormat("%.1f  ");

//设置图表主题(会修改到扇区的颜色)
// 可选： QChart::ChartThemeLight
// QChart::ChartThemeBlueCerulean
// QChart::ChartThemeDark
// QChart::ChartThemeBrownSand
// QChart::ChartThemeBlueNcs
// QChart::ChartThemeHighContrast
// QChart::ChartThemeBlueIcy
// QChart::ChartThemeQt
chart->setTheme(QChart::ChartThemeDark);

6. Display chart:

QChartView *chartView;
chartView = new QChartView(chart);
ui->verticalLayout->insertWidget(chartView);

The overall code presentation:

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QtCharts>

QT_BEGIN_NAMESPACE
namespace Ui {
    
     class MainWindow; }
QT_END_NAMESPACE

QT_CHARTS_BEGIN_NAMESPACE
class QChartView;
class QChart;
QT_CHARTS_END_NAMESPACE

QT_CHARTS_USE_NAMESPACE

class MainWindow : public QMainWindow
{
    
    
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
    QChart * createAreaChart() const; // 绘制自定义的面积图
private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

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

	// 创建QChartView 对象
	QChartView *chartView;
	// QChartView 对象载入面积图
	chartView = new QChartView(createAreaChart());
	// 显示图标
	ui->verticalLayout->insertWidget(chartView);

}

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

//绘制面积图
QChart *MainWindow::createAreaChart() const
{
    
    

    QChart *chart = new QChart();
    chart->setTitle("面积图演示");

    QLineSeries *series1 = new QLineSeries(chart);
    series1->setName("A店铺接单数");

    series1->append(0,8);
    series1->append(1,10);
    series1->append(2,12);
    series1->append(3,17);
    series1->append(4,19);
    series1->append(5,18);
    series1->append(6,20);

    QLineSeries *series2 = new QLineSeries(chart);
    series2->setName("B店铺接单数");
    series2->append(0,1);
    series2->append(1,4);
    series2->append(2,5);
    series2->append(3,3);
    series2->append(4,11);
    series2->append(5,16);
    series2->append(6,19);

    QAreaSeries *area1 = new QAreaSeries(series1, 0);
    QAreaSeries *area2 = new QAreaSeries(series2, series1);
    area1->setName("A区域");
    area2->setName("B区域");
    chart->addSeries(area1);
    chart->addSeries(area2);
    chart->createDefaultAxes();
    chart->axes(Qt::Horizontal).first()->setRange(0, 6);
    chart->axes(Qt::Vertical).first()->setRange(0, 20);

    // Add space to label to add space between labels and axis在标签和轴之间加空格
    QValueAxis *axisY = qobject_cast<QValueAxis*>(chart->axes(Qt::Vertical).first());
    Q_ASSERT(axisY);
    axisY->setLabelFormat("%.1f  ");
	chart->setTheme(QChart::ChartThemeBrownSand);
    return chart;
}