qt里的QPieSeries饼图

#include

#include <QtCharts/QChart>

#include <QtCharts/QChartView>

#include<QtCharts/QChartView>

#include<QtCharts/QPieSeries>

#include<QtCharts/QPieSlice>

#include<QtCharts/QLineSeries>

#include<QtCharts/QSplineSeries>

#include

#include

Form::Form(QWidget *parent) :

QWidget(parent),

ui(new Ui::Form)

{

ui->setupUi(this);

QPieSeries * pie_series = new QPieSeries(this);

connect(pie_series, SIGNAL(clicked(QPieSlice*)), this, SLOT(onPieSeriesClicked(QPieSlice*)));

//定义各扇形切片的颜色

static const QStringList list_pie_color = {

"#6480D6","#A1DC85","#FFAD25","#FF7777","#84D1EF","#4CB383",

};

//设置数据

QList<qreal> list_data = {3.1, 3.2, 3.3, 3.4, 3.5, 3.6};

//扇形

for (int i = 0; i < list_pie_color.size(); i++) {

QPieSlice* pie_slice = new QPieSlice(this);

pie_slice->setLabelVisible(true);

pie_slice->setValue(list_data[i]);

pie_slice->setLabel(QString::number(list_data[i]));

pie_slice->setColor(list_pie_color[i]);

pie_slice->setLabelColor(list_pie_color[i]);

pie_slice->setBorderColor(list_pie_color[i]);

pie_series->append(pie_slice);

}

//图表视图
 chart2 = new QChart();

chart2->setTitle("XXX统计饼图");

//设置暗黑主题

chart2->setTheme(QChart::ChartThemeDark);

//标题字体

QFont font = qApp->font();

font.setBold(true);

font.setPointSize(16);

chart2->setTitleFont(font);

//加入饼图

chart2->addSeries(pie_series);

chart2->setAnimationOptions(QChart::SeriesAnimations);

//图例

chart2->legend()->setAlignment(Qt::AlignBottom);

chart2->legend()->setBackgroundVisible(false);

for (int i = 0; i < list_pie_color.size(); i++) {
    chart2->legend()->markers(pie_series)[i]->setLabel("统计项" + QString::number(i+1));
}

//加入绘画视图

QChartView* chartView = new QChartView(this);

chartView->setRenderHint(QPainter::Antialiasing);

chartView->setChart(chart2);

//加入布局

        QHBoxLayout *lay=new QHBoxLayout(this);

        lay->setContentsMargins(0, 0, 0, 0);

        lay->addWidget(chartView);
        ui->widget_2->setLayout(lay);

//------------------------------------------------------------------------

}

void Form::onPieSeriesClicked(QPieSlice* slice)

{

slice->setExploded(!slice->isExploded());

}