//! [6]
void Widget::updateRotation()
{
for (int i = 0; i < m_donuts.count(); i++) {
QPieSeries *donut = m_donuts.at(i);
qreal phaseShift = -50 + QRandomGenerator::global()->bounded(100);
donut->setPieStartAngle(donut->pieStartAngle() + phaseShift);
donut->setPieEndAngle(donut->pieEndAngle() + phaseShift);
}
}
QT_CHARTS_USE_NAMESPACE
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
setMinimumSize(800, 600);
//! [1]
QChartView *chartView = new QChartView;
chartView->setRenderHint(QPainter::Antialiasing);
QChart *chart = chartView->chart();
chart->legend()->setVisible(false);
chart->setTitle("Nested donuts demo");
chart->setAnimationOptions(QChart::AllAnimations);
//! [1]
//! [2]
qreal minSize = 0.1;
qreal maxSize = 0.9;
int donutCount = 5;
//! [2]
//! [3]
for (int i = 0; i < donutCount; i++) {
QPieSeries *donut = new QPieSeries;
int sliceCount = 3 + QRandomGenerator::global()->bounded(3);
for (int j = 0; j < sliceCount; j++) {
qreal value = 100 + QRandomGenerator::global()->bounded(100);
QPieSlice *slice = new QPieSlice(QString("%1").arg(value), value);
slice->setLabelVisible(true);
slice->setLabelColor(Qt::white);
slice->setLabelPosition(QPieSlice::LabelInsideTangential);
connect(slice, &QPieSlice::hovered, this, &Widget::explodeSlice);
donut->append(slice);
donut->setHoleSize(minSize + i * (maxSize - minSize) / donutCount);
donut->setPieSize(minSize + (i + 1) * (maxSize - minSize) / donutCount);
}
m_donuts.append(donut);
chartView->chart()->addSeries(donut);
}
//! [3]
// create main layout
//! [4]
QGridLayout *mainLayout = new QGridLayout;
mainLayout->addWidget(chartView, 1, 1);
setLayout(mainLayout);
//! [4]
//! [5]
updateTimer = new QTimer(this);
connect(updateTimer, &QTimer::timeout, this, &Widget::updateRotation);
updateTimer->start(1250);
//! [5]
}
void PieChart::plot()
{
chart->removeAllSeries();
chart->setAnimationOptions( (QChart::AnimationOption)ui->animationComboBox->currentIndex() );
ui->chartView->setRenderHint(QPainter::Antialiasing, ui->antialiasingCheckBox->isChecked());
//create series
QPieSeries * series = new QPieSeries();
// series->setLabelsVisible();
series->setHorizontalPosition( ui->hPosSpinBox->value() );
series->setVerticalPosition( ui->vPosSpinBox->value() );
series->setPieSize( ui->sizeFactorSpinBox->value() );
series->setPieStartAngle( ui->startAngleSpinBox->value() );
series->setPieEndAngle( ui->endAngleSpinBox->value() );
series->setHoleSize( ui->holeSizeSpinBox->value() );
foreach( pie_chart_plot_item_t sliceItem, items )
{
FlexiPieSlice * slice = new FlexiPieSlice( sliceItem.name, sliceItem.value );
slice->setExplodeOnHover( ui->explodeSliceCheckBox->isChecked() );
if(sliceItem.colorIsSet)
{
//slice->setPen(QPen(sliceItem.color, 2));
slice->setBrush(sliceItem.color);
}
*series << slice;
}
