Qt BarChart实践

按照帮助文档编写

运行截图

上代码

#include "widget.h"

#include "ui_widget.h"

Widget::Widget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Widget)

{

    ui->setupUi(this);

    QBarSet *set0 = new QBarSet("Jane");

    QBarSet *set1 = new QBarSet("John");

    QBarSet *set2 = new QBarSet("Axel");

    QBarSet *set3 = new QBarSet("Mary");

    QBarSet *set4 = new QBarSet("Samantha");

    *set0 << 1 << 2 << 3 << 4 << 5 << 6;

    *set1 << 5 << 0 << 0 << 4 << 0 << 7;

    *set2 << 3 << 5 << 8 << 13 << 8 << 5;

    *set3 << 5 << 6 << 7 << 3 << 4 << 5;

    *set4 << 9 << 7 << 5 << 3 << 1 << 2;

    QBarSeries *series = new QBarSeries();

    series->append(set0);

    series->append(set1);

    series->append(set2);

    series->append(set3);

    series->append(set4);

    QChart *chart = new QChart();

    chart->addSeries(series);

    chart->setTitle("Simple barchart example");

    chart->setAnimationOptions(QChart::SeriesAnimations);

    QStringList categories;

    categories << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun";

    QBarCategoryAxis *axis = new QBarCategoryAxis();

    axis->append(categories);

    chart->createDefaultAxes();

    chart->setAxisX(axis, series);

    chart->legend()->setVisible(true);

    chart->legend()->setAlignment(Qt::AlignBottom);

    QChartView *chartView = new QChartView(this);

    chartView->setChart(chart);

    chartView->setRenderHint(QPainter::Antialiasing);

    chartView->resize(400,300);

    chartView->show();

}

Widget::~Widget()

{

    delete ui;

}