饼状图一

参考文章：

https://blog.csdn.net/xiezhongyuan07/article/details/82684118 

效果图

void Form::init()

{

    QPieSeries *series = new QPieSeries();

    //饼图中间空心的大小

    series->setHoleSize(0.35);

    QPieSlice *slice1 = new QPieSlice(QString("111"), 1);

    slice1->setLabelVisible();

    slice1->setLabelPosition(QPieSlice::LabelOutside);

    slice1->setBrush(QColor(59,160,50));

    QPieSlice *slice2 = new QPieSlice(QString(""), 1);

    slice2->setLabel(QString("222"));

    slice2->setLabelVisible();

    slice2->setLabelPosition(QPieSlice::LabelInsideHorizontal);

    slice2->setBrush(QColor(59,160,100));

    QPieSlice *slice3 = new QPieSlice(QString(""), 1);

    slice3->setLabel(QString("333"));

    slice3->setLabelVisible();

    slice3->setLabelPosition(QPieSlice::LabelOutside);

    slice3->setBrush(QColor(59,160,150));

    QPieSlice *slice4 = new QPieSlice(QString(""), 1);

    slice4->setLabel(QString("444"));

    slice4->setLabelVisible();

    slice4->setLabelPosition(QPieSlice::LabelOutside);

    slice4->setBrush(QColor(255,0,0));

    series->append(slice1);

    series->append(slice2);

    series->append(slice3);

    series->append(slice4);

    //开始角度

    series->setPieStartAngle(100);

    //结束角度

    series->setPieEndAngle(300);

    QChartView *chartView = new QChartView();

    chartView->setRenderHint(QPainter::Antialiasing);

    //chartView->chart()->setTitle("DonutChart Example");

    chartView->chart()->addSeries(series);

    chartView->chart()->legend()->hide();

    //chartView->chart()->legend()->setAlignment(Qt::AlignRight);

    QVBoxLayout *vb = new QVBoxLayout(this);

    vb->addWidget(chartView);

    this->setLayout(vb);

    m_plabel = new QLabel(this);

    m_plabel->setFixedSize(40,40);

    m_plabel->setText("test");

    m_plabel->setStyleSheet(QString("background:transparent;font-family:Mircsoft Yahei;font-size:18px; color:#1564FF; font-weight:bold;"));

    m_plabel->move((this->width()-m_plabel->width())/2,

                            (this->height()-m_plabel->height())/2);

}

void Form::resizeEvent(QResizeEvent* event)

{

    m_plabel->move((this->width()-m_plabel->width())/2,

                            (this->height()-m_plabel->height())/2);

    return QWidget::resizeEvent(event);

}