QBarSeries相关内容

学习一下Qt Charts的柱状图部分。参考书籍：Qt5.9 C++开发指南
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 slots:
    //刷新柱状图
    void on_pushButton_clicked();

private:
    void updateTableWidget_2();

    //创建QBarSeries
    void createQBarSeries();
    //创建QPercentBarSeries
    void createQPercentBarSeries();
    //创建QStackedBarSeries
    void createQStackedBarSeries();

    //创建QHorizontalBarSeries
    void createQHorizontalBarSeries();
    //创建QHorizontalPercentBarSeries
    void createQHorizontalPercentBarSeries();
    //创建QHorizontalStackedBarSeries
    void createQHorizontalStackedBarSeries();

private:
    Ui::MainWindow *ui;

    QList<QChart *> m_charts;
};

#endif // MAINWINDOW_H

cpp文件

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QTableWidgetItem>
#include <QBarSeries>
#include <QBarSet>
#include <QBarCategoryAxis>
#include <QLineSeries>
#include <QValueAxis>
#include <QPercentBarSeries>
#include <QStackedBarSeries>
#include <QHorizontalBarSeries>
#include <QHorizontalPercentBarSeries>
#include <QHorizontalStackedBarSeries>

#include <QDebug>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    //初始化表格一
    QStringList headText = QStringList() << QStringLiteral("姓名") << QStringLiteral("语文") << QStringLiteral("数学") << QStringLiteral("英语") << QStringLiteral("平均分");
    ui->tableWidget->setHorizontalHeaderLabels(headText);
    for (int i = 0; i < ui->tableWidget->rowCount(); i++)
    {
        int Chinese = ui->tableWidget->item(i, 1)->text().toInt();
        int Math = ui->tableWidget->item(i, 2)->text().toInt();
        int English = ui->tableWidget->item(i, 3)->text().toInt();
        float avgScore = (Chinese + Math + English) / 3.0;
        QTableWidgetItem *itemAvgScore = new QTableWidgetItem(QString::number(avgScore, 'f', 2));
        ui->tableWidget->setItem(i, 4, itemAvgScore);
    }
    ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
    //初始化表格二
    QStringList headText2 = QStringList() << QStringLiteral("分数段") << QStringLiteral("语文") << QStringLiteral("数学") << QStringLiteral("英语");
    ui->tableWidget_2->setHorizontalHeaderLabels(headText2);
    for (int i = 0; i < 5; i++)
    {
        for (int j = 1; j < 4; j++)
        {
            QTableWidgetItem *item = new QTableWidgetItem;
            ui->tableWidget_2->setItem(i, j, item);
        }
    }
    //根据表格一，更新表格二
    updateTableWidget_2();
    ui->tableWidget_2->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);

    createQBarSeries();
    createQPercentBarSeries();
    createQStackedBarSeries();

    createQHorizontalBarSeries();
    createQHorizontalPercentBarSeries();
    createQHorizontalStackedBarSeries();

    m_charts.append(ui->chartViewBarSeries->chart());
    m_charts.append(ui->chartViewPercentBarSeries->chart());
    m_charts.append(ui->chartViewStackedBarSeries->chart());
    m_charts.append(ui->chartViewHorizontalBarSeries->chart());
    m_charts.append(ui->chartViewHorizontalPercentBarSeries->chart());
    m_charts.append(ui->chartViewHorizontalStackedBarSeries->chart());
}

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

void MainWindow::updateTableWidget_2()
{
    //统计
    int count[5][3] = {0};
    for (int i = 0; i < ui->tableWidget->rowCount(); i++)
    {
        for (int j = 1; j < 4; j++)
        {
            if (ui->tableWidget->item(i, j)->text().toInt() >= 90)
                 count[0][j - 1]++;
            else if (ui->tableWidget->item(i, j)->text().toInt() >= 80 && ui->tableWidget->item(i, j)->text().toInt() <= 89)
                 count[1][j - 1]++;
            else if (ui->tableWidget->item(i, j)->text().toInt() >= 70 && ui->tableWidget->item(i, j)->text().toInt() <= 79)
                 count[2][j - 1]++;
            else if (ui->tableWidget->item(i, j)->text().toInt() >= 60 && ui->tableWidget->item(i, j)->text().toInt() <= 69)
                 count[3][j - 1]++;
            else if (ui->tableWidget->item(i, j)->text().toInt() < 60)
                 count[4][j - 1]++;
        }
    }
    for (int i = 0; i < 5; i++)
    {
        for (int j = 1; j < 4; j++)
        {
            ui->tableWidget_2->item(i, j)->setText(QString::number(count[i][j - 1]++));
        }
    }
}

void MainWindow::createQBarSeries()
{
    //此处没有new QChart和setChart();证明chartView内部处理了
    ui->chartViewBarSeries->setRenderHint(QPainter::Antialiasing);
    ui->chartViewBarSeries->chart()->setTitle(QStringLiteral("QBarSeries演示"));
    ui->chartViewBarSeries->chart()->setTheme(QChart::ChartThemeDark);
    //创建数据集
    QBarSet *setChinese = new QBarSet(QStringLiteral("语文"));
    QBarSet *setMath = new QBarSet(QStringLiteral("数学"));
    QBarSet *setEnglish = new QBarSet(QStringLiteral("英语"));
    QLineSeries *lineSeries = new QLineSeries;
    for (int i = 0; i < ui->tableWidget->rowCount(); i++)
    {
            setChinese->append(ui->tableWidget->item(i, 1)->text().toInt());
            setMath->append(ui->tableWidget->item(i, 2)->text().toInt());
            setEnglish->append(ui->tableWidget->item(i, 3)->text().toInt());
            lineSeries->append(i, ui->tableWidget->item(i, 4)->text().toFloat());
    }
    //创建柱状图序列，并添加数据集
    QBarSeries *barSeries = new QBarSeries;
    barSeries->append(setChinese);
    barSeries->append(setMath);
    barSeries->append(setEnglish);
    ui->chartViewBarSeries->chart()->addSeries(barSeries);
    //创建柱状图坐标轴
    QBarCategoryAxis *barAxis = new QBarCategoryAxis();
    barAxis->append(QStringList() << QStringLiteral("学生1") << QStringLiteral("学生2") << QStringLiteral("学生3") << QStringLiteral("学生4") << QStringLiteral("学生5"));
    ui->chartViewBarSeries->chart()->setAxisX(barAxis, barSeries);//横坐标，坐标轴
    //添加折线图序列
    lineSeries->setName(QStringLiteral("平均分"));
    lineSeries->setPen(QPen(Qt::red, 2));
    lineSeries->setPointsVisible(true);
    ui->chartViewBarSeries->chart()->addSeries(lineSeries);
    ui->chartViewBarSeries->chart()->setAxisX(barAxis, lineSeries);//横坐标，坐标轴
    //添加Y轴：数值型坐标轴
    QValueAxis *axisY = new QValueAxis;
    axisY->setRange(0, 100);
    axisY->setTitleText(QStringLiteral("分数"));
    axisY->setTickCount(6);
    axisY->setLabelFormat("%d");
    ui->chartViewBarSeries->chart()->setAxisY(axisY, barSeries);
    ui->chartViewBarSeries->chart()->setAxisY(axisY, lineSeries);
    //设置图例位置
    ui->chartViewBarSeries->chart()->legend()->setAlignment(Qt::AlignBottom);
}

void MainWindow::createQPercentBarSeries()
{
    ui->chartViewPercentBarSeries->setRenderHint(QPainter::Antialiasing);
    ui->chartViewPercentBarSeries->chart()->setTheme(QChart::ChartThemeDark);
    ui->chartViewPercentBarSeries->chart()->setTitle(QStringLiteral("QPercentBarSeries演示"));
    //创建数据集
    QBarSet *Chinese = new QBarSet(QStringLiteral("语文"));
    QBarSet *Math = new QBarSet(QStringLiteral("数学"));
    QBarSet *English = new QBarSet(QStringLiteral("英语"));
    for (int i = 0; i < ui->tableWidget_2->rowCount(); i++)
    {
        Chinese->append(ui->tableWidget_2->item(i, 1)->text().toFloat());
        Math->append(ui->tableWidget_2->item(i, 2)->text().toFloat());
        English->append(ui->tableWidget_2->item(i, 3)->text().toFloat());
    }
    //创建百分比柱状图序列，并添加数据集
    QPercentBarSeries *percentBarSeries = new QPercentBarSeries;
    percentBarSeries->append(Chinese);
    percentBarSeries->append(Math);
    percentBarSeries->append(English);
    percentBarSeries->setBarWidth(0.3);
    percentBarSeries->setLabelsVisible(true);
    ui->chartViewPercentBarSeries->chart()->addSeries(percentBarSeries);
    //创建坐标轴
    QBarCategoryAxis *axisX = new QBarCategoryAxis();
    axisX->append(QStringList() << QStringLiteral("90分以上") << QStringLiteral("80-89分") << QStringLiteral("70-79分") << QStringLiteral("60-69分") << QStringLiteral("60分以下"));
    ui->chartViewPercentBarSeries->chart()->setAxisX(axisX, percentBarSeries);
    QValueAxis *axisY = new QValueAxis;
    axisY->setRange(0, 100);
    axisY->setTitleText(QStringLiteral("百分比"));
    axisY->setTickCount(6);
    ui->chartViewPercentBarSeries->chart()->setAxisY(axisY, percentBarSeries);
    //图例
    ui->chartViewPercentBarSeries->chart()->legend()->setAlignment(Qt::AlignRight);
}

void MainWindow::createQStackedBarSeries()
{
    ui->chartViewStackedBarSeries->setRenderHint(QPainter::Antialiasing);
    ui->chartViewStackedBarSeries->chart()->setTitle(QStringLiteral("QStackedBarSeries演示"));
    ui->chartViewStackedBarSeries->chart()->setTheme(QChart::ChartThemeDark);
    //创建数据集
    QBarSet *Chinese = new QBarSet(QStringLiteral("语文"));
    QBarSet *Math = new QBarSet(QStringLiteral("数学"));
    QBarSet *English = new QBarSet(QStringLiteral("英语"));
    for (int i = 0; i < ui->tableWidget->rowCount(); i++)
    {
        Chinese->append(ui->tableWidget->item(i, 1)->text().toInt());
        Math->append(ui->tableWidget->item(i, 2)->text().toInt());
        English->append(ui->tableWidget->item(i, 3)->text().toInt());
    }
    //创建堆叠柱状图，并添加数据
    QStackedBarSeries *stackedBarSeries = new QStackedBarSeries;
    stackedBarSeries->append(Chinese);
    stackedBarSeries->append(Math);
    stackedBarSeries->append(English);
    stackedBarSeries->setLabelsVisible(true);
    ui->chartViewStackedBarSeries->chart()->addSeries(stackedBarSeries);
    //创建坐标轴
    QBarCategoryAxis *axisX = new QBarCategoryAxis;
    axisX->append(QStringList() << QStringLiteral("学生1") << QStringLiteral("学生2") << QStringLiteral("学生3") << QStringLiteral("学生4") << QStringLiteral("学生5"));
    ui->chartViewStackedBarSeries->chart()->setAxisX(axisX, stackedBarSeries);
    QValueAxis *axisY = new QValueAxis;
    axisY->setRange(0, 300);
    axisY->setTitleText(QStringLiteral("总分"));
    ui->chartViewStackedBarSeries->chart()->setAxisY(axisY, stackedBarSeries);
    //图例
    ui->chartViewStackedBarSeries->chart()->legend()->setAlignment(Qt::AlignRight);
}

void MainWindow::createQHorizontalBarSeries()
{
    //此处没有new QChart和setChart();证明chartView内部处理了
    ui->chartViewHorizontalBarSeries->setRenderHint(QPainter::Antialiasing);
    ui->chartViewHorizontalBarSeries->chart()->setTitle(QStringLiteral("QHorizontalBarSeries演示"));
    ui->chartViewHorizontalBarSeries->chart()->setTheme(QChart::ChartThemeDark);
    //创建数据集
    QBarSet *setChinese = new QBarSet(QStringLiteral("语文"));
    QBarSet *setMath = new QBarSet(QStringLiteral("数学"));
    QBarSet *setEnglish = new QBarSet(QStringLiteral("英语"));
    QLineSeries *lineSeries = new QLineSeries;
    for (int i = 0; i < ui->tableWidget->rowCount(); i++)
    {
            setChinese->append(ui->tableWidget->item(i, 1)->text().toInt());
            setMath->append(ui->tableWidget->item(i, 2)->text().toInt());
            setEnglish->append(ui->tableWidget->item(i, 3)->text().toInt());
            lineSeries->append(ui->tableWidget->item(i, 4)->text().toFloat(), i);
    }
    //创建柱状图序列，并添加数据集
    QHorizontalBarSeries *barSeries = new QHorizontalBarSeries;
    barSeries->append(setChinese);
    barSeries->append(setMath);
    barSeries->append(setEnglish);
    ui->chartViewHorizontalBarSeries->chart()->addSeries(barSeries);
    //创建柱状图坐标轴
    QBarCategoryAxis *axisY = new QBarCategoryAxis();
    axisY->append(QStringList() << QStringLiteral("学生1") << QStringLiteral("学生2") << QStringLiteral("学生3") << QStringLiteral("学生4") << QStringLiteral("学生5"));
    ui->chartViewHorizontalBarSeries->chart()->setAxisY(axisY, barSeries);
    //添加折线图序列
    lineSeries->setName(QStringLiteral("平均分"));
    lineSeries->setPen(QPen(Qt::red, 2));
    lineSeries->setPointsVisible(true);
    ui->chartViewHorizontalBarSeries->chart()->addSeries(lineSeries);
    ui->chartViewHorizontalBarSeries->chart()->setAxisY(axisY, lineSeries);
    //添加X轴：数值型坐标轴
    QValueAxis *axisX = new QValueAxis;
    axisX->setRange(0, 100);
    axisX->setTitleText(QStringLiteral("分数"));
    axisX->setTickCount(6);
    axisX->setLabelFormat("%d");
    axisX->setLabelsVisible(true);
    ui->chartViewHorizontalBarSeries->chart()->setAxisX(axisX, barSeries);
    ui->chartViewHorizontalBarSeries->chart()->setAxisX(axisX, lineSeries);
    //设置图例位置
    ui->chartViewHorizontalBarSeries->chart()->legend()->setAlignment(Qt::AlignRight);
}

void MainWindow::createQHorizontalPercentBarSeries()
{
    ui->chartViewHorizontalPercentBarSeries->setRenderHint(QPainter::Antialiasing);
    ui->chartViewHorizontalPercentBarSeries->chart()->setTheme(QChart::ChartThemeDark);
    ui->chartViewHorizontalPercentBarSeries->chart()->setTitle(QStringLiteral("QHorizontalPercentBarSeries演示"));
    //创建数据集
    QBarSet *Chinese = new QBarSet(QStringLiteral("语文"));
    QBarSet *Math = new QBarSet(QStringLiteral("数学"));
    QBarSet *English = new QBarSet(QStringLiteral("英语"));
    for (int i = 0; i < ui->tableWidget_2->rowCount(); i++)
    {
        Chinese->append(ui->tableWidget_2->item(i, 1)->text().toFloat());
        Math->append(ui->tableWidget_2->item(i, 2)->text().toFloat());
        English->append(ui->tableWidget_2->item(i, 3)->text().toFloat());
    }
    //创建百分比柱状图序列，并添加数据集
    QHorizontalPercentBarSeries *percentBarSeries = new QHorizontalPercentBarSeries;
    percentBarSeries->append(Chinese);
    percentBarSeries->append(Math);
    percentBarSeries->append(English);
    percentBarSeries->setBarWidth(0.3);
    percentBarSeries->setLabelsVisible(true);
    ui->chartViewHorizontalPercentBarSeries->chart()->addSeries(percentBarSeries);
    //创建坐标轴
    QBarCategoryAxis *axisY = new QBarCategoryAxis();
    axisY->append(QStringList() << QStringLiteral("90分以上") << QStringLiteral("80-89分") << QStringLiteral("70-79分") << QStringLiteral("60-69分") << QStringLiteral("60分以下"));
    ui->chartViewHorizontalPercentBarSeries->chart()->setAxisY(axisY, percentBarSeries);
    QValueAxis *axisX = new QValueAxis;
    axisX->setRange(0, 100);
    axisX->setTitleText(QStringLiteral("百分比"));
    axisX->setTickCount(6);
    ui->chartViewHorizontalPercentBarSeries->chart()->setAxisX(axisX, percentBarSeries);
    //图例
    ui->chartViewHorizontalPercentBarSeries->chart()->legend()->setAlignment(Qt::AlignRight);
}

void MainWindow::createQHorizontalStackedBarSeries()
{
    ui->chartViewHorizontalStackedBarSeries->setRenderHint(QPainter::Antialiasing);
    ui->chartViewHorizontalStackedBarSeries->chart()->setTitle(QStringLiteral("QHorizontalStackedBarSeries演示"));
    ui->chartViewHorizontalStackedBarSeries->chart()->setTheme(QChart::ChartThemeDark);
    //创建数据集
    QBarSet *Chinese = new QBarSet(QStringLiteral("语文"));
    QBarSet *Math = new QBarSet(QStringLiteral("数学"));
    QBarSet *English = new QBarSet(QStringLiteral("英语"));
    for (int i = 0; i < ui->tableWidget->rowCount(); i++)
    {
        Chinese->append(ui->tableWidget->item(i, 1)->text().toInt());
        Math->append(ui->tableWidget->item(i, 2)->text().toInt());
        English->append(ui->tableWidget->item(i, 3)->text().toInt());
    }
    //创建堆叠柱状图，并添加数据
    QHorizontalStackedBarSeries *stackedBarSeries = new QHorizontalStackedBarSeries;
    stackedBarSeries->append(Chinese);
    stackedBarSeries->append(Math);
    stackedBarSeries->append(English);
    stackedBarSeries->setLabelsVisible(true);
    ui->chartViewHorizontalStackedBarSeries->chart()->addSeries(stackedBarSeries);
    //创建坐标轴
    QBarCategoryAxis *axisY = new QBarCategoryAxis;
    axisY->append(QStringList() << QStringLiteral("学生1") << QStringLiteral("学生2") << QStringLiteral("学生3") << QStringLiteral("学生4") << QStringLiteral("学生5"));
    ui->chartViewHorizontalStackedBarSeries->chart()->setAxisY(axisY, stackedBarSeries);
    QValueAxis *axisX = new QValueAxis;
    axisX->setRange(0, 300);
    axisX->setTitleText(QStringLiteral("总分"));
    ui->chartViewHorizontalStackedBarSeries->chart()->setAxisX(axisX, stackedBarSeries);
    //图例
    ui->chartViewHorizontalStackedBarSeries->chart()->legend()->setAlignment(Qt::AlignRight);
}

void MainWindow::on_pushButton_clicked()
{
    updateTableWidget_2();

    foreach (QChart *chart, m_charts)
    {
        chart->removeAllSeries();           //删除所有序列
        chart->removeAxis(chart->axisX());  //删除坐标轴
        chart->removeAxis(chart->axisY());  //删除坐标轴
    }
    //刷新
    createQBarSeries();
    createQPercentBarSeries();
    createQStackedBarSeries();

    createQHorizontalBarSeries();
    createQHorizontalPercentBarSeries();
    createQHorizontalStackedBarSeries();
}