1.在工程文件.pro中加入
QT += charts
2.需要的头文件
#include <QChart>
#include <QBarSet>
#include <QBarSeries>
3.创建集合并向它们追加数据
QBarSet *set0 = new QBarSet("Jane");
*set0 << 1 << 2 << 3 << 4 << 5 << 6;
4.创建 series结合并且添加barsets
QBarSeries *series = new QBarSeries();
series->append(set0);
5.创建chart，并且添加series
QChart *chart = new QChart();
chart->addSeries(series);
6.创建类别轴和类别列表
1 QStringList categories; 2 categories << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun"; 3 QBarCategoryAxis *axis = new QBarCategoryAxis(); 4 axis->append(categories); 5 chart->createDefaultAxes(); 6 chart->setAxisX(axis, series);
7.显示图例
chart->legend()->setVisible(true);
chart->legend()->setAlignment(Qt::AlignBottom);
8.创建画布
QChartView *chartView = new QChartView(chart);
chartView->setRenderHint(QPainter::Antialiasing);
显示代码
1 barChart::barChart(QWidget *parent) : 2 QWidget(parent), 3 ui(new Ui::barChart) 4 { 5 ui->setupUi(this); 6 QBarSet* set0 = new QBarSet("jane"); 7 QBarSet* set1 = new QBarSet("jone"); 8 QBarSet* set2 = new QBarSet("mary"); 9 QBarSet* set3 = new QBarSet("Alsex"); 10 QBarSet* set4 = new QBarSet("summer"); 11 *set0<<1<<2<<3<<4<<5; 12 *set1<<5<<9<<2<<0<<3; 13 *set2<<3<<7<<1<<4<<2; 14 *set3<<6<<1<<9<<8<<3; 15 *set4<<0<<2<<6<<8<<1; 16 QBarSeries* barSerise = new QBarSeries(); 17 barSerise->append(set0); 18 barSerise->append(set1); 19 barSerise->append(set2); 20 barSerise->append(set3); 21 barSerise->append(set4); 22 QChart* chart = new QChart(); 23 chart->addSeries(barSerise); 24 chart->setTitle("Simple barchart example"); 25 chart->setAnimationOptions(QChart::SeriesAnimations); 26 27 QStringList str; 28 str<< "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun"; 29 QBarCategoryAxis* axisx = new QBarCategoryAxis(); 30 axisx->append(str); 31 chart->createDefaultAxes(); 32 chart->setAxisX(axisx); 33 34 chart->legend()->setVisible(true); 35 chart->legend()->setAlignment(Qt::AlignBottom); 36 37 QChartView* chartView = new QChartView(chart); 38 chartView->setRenderHint(QPainter::Antialiasing); 39 40 QHBoxLayout *layout = new QHBoxLayout(); 41 layout->setContentsMargins(0, 0, 0, 0); 42 layout->addWidget(chartView); 43 setLayout(layout); 44 45 } 46 47 barChart::~barChart() 48 { 49 delete ui; 50 }
运行结果
