|
|
#include "widget.h"
|
|
|
#include <QGridLayout>
|
|
|
#include <QPieSlice>
|
|
|
#include <QTime>
|
|
|
#include <QChartView>
|
|
|
#include <QChart>
|
|
|
#include <QLegend>
|
|
|
#include <QTimer>
|
|
|
|
|
|
QTCOMMERCIALCHART_USE_NAMESPACE
|
|
|
|
|
|
Widget::Widget(QWidget *parent)
|
|
|
: QWidget(parent),
|
|
|
mainData(0)
|
|
|
{
|
|
|
setMinimumSize(800, 600);
|
|
|
qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
|
|
|
|
|
|
//! [1]
|
|
|
QChartView *chartView = new QChartView;
|
|
|
chartView->setRenderHint(QPainter::Antialiasing);
|
|
|
QChart *chart = chartView->chart();
|
|
|
chart->setAnimationOptions(QChart::AllAnimations);
|
|
|
chart->legend()->setVisible(false);
|
|
|
//! [1]
|
|
|
|
|
|
//! [2]
|
|
|
mainData = new QPieSeries;
|
|
|
mainData->setPieSize(0.6);
|
|
|
//! [2]
|
|
|
|
|
|
//! [3]
|
|
|
for (int j = 0; j < 4; j++) {
|
|
|
// create new slice for the mainData
|
|
|
QPieSlice *slice = new QPieSlice;
|
|
|
slice->setLabelColor(Qt::white);
|
|
|
mainData->append(slice);
|
|
|
|
|
|
// create a new detailed data for the slice
|
|
|
QPieSeries *donut = new QPieSeries;
|
|
|
donut->setHoleSize(mainData->pieSize());
|
|
|
donut->setPieSize(mainData->pieSize() + 0.15);
|
|
|
|
|
|
// when mainData slice is redrawn make sure the detailed data slices are aligned with it
|
|
|
connect(slice, SIGNAL(startAngleChanged()), this, SLOT(updatedStartAngle()));
|
|
|
connect(slice, SIGNAL(angleSpanChanged()), this, SLOT(updatedAngleSpan()));
|
|
|
|
|
|
// create the detailed data
|
|
|
for (int j = 0; j < 3; j++) {
|
|
|
qreal value = 10 + qrand() % 100;
|
|
|
QPieSlice *slice = new QPieSlice(QString("%1").arg(value), value);
|
|
|
donut->append(slice);
|
|
|
}
|
|
|
donut->setLabelsPosition(QPieSlice::LabelOutside);
|
|
|
donut->setLabelsVisible();
|
|
|
detailedData.append(donut);
|
|
|
|
|
|
// update the value and label of mainData
|
|
|
slice->setValue(donut->sum());
|
|
|
slice->setLabel(QString("%1").arg(donut->sum()));
|
|
|
}
|
|
|
//! [3]
|
|
|
|
|
|
//! [4]
|
|
|
mainData->setLabelsVisible();
|
|
|
mainData->setLabelsPosition(QPieSlice::LabelInsideHorizontal);
|
|
|
chartView->chart()->addSeries(mainData);
|
|
|
for (int i = 0; i < detailedData.count(); i++)
|
|
|
chartView->chart()->addSeries(detailedData.at(i));
|
|
|
//! [4]
|
|
|
|
|
|
//! [5]
|
|
|
// create main layout
|
|
|
QGridLayout* mainLayout = new QGridLayout;
|
|
|
mainLayout->addWidget(chartView, 1, 1);
|
|
|
setLayout(mainLayout);
|
|
|
//! [5]
|
|
|
|
|
|
//! [6]
|
|
|
// modify the value of one detailed slice every 2.5 sec
|
|
|
QTimer *updateTimer = new QTimer(this);
|
|
|
connect(updateTimer, SIGNAL(timeout()), this, SLOT(highlight()));
|
|
|
updateTimer->start(2500);
|
|
|
//! [6]
|
|
|
}
|
|
|
|
|
|
Widget::~Widget()
|
|
|
{
|
|
|
|
|
|
}
|
|
|
|
|
|
//! [7]
|
|
|
void Widget::updatedStartAngle()
|
|
|
{
|
|
|
// when the mainData slice has been updated the detailed data QPieSeries object as well
|
|
|
QPieSlice* slice = qobject_cast<QPieSlice *>(sender());
|
|
|
QPieSeries *detailsDonut = detailedData.at(slice->series()->slices().indexOf(slice));
|
|
|
detailsDonut->setPieStartAngle(slice->startAngle());
|
|
|
}
|
|
|
|
|
|
void Widget::updatedAngleSpan()
|
|
|
{
|
|
|
// when the mainData slice has been updated the detailed data QPieSeries object as well
|
|
|
QPieSlice* slice = qobject_cast<QPieSlice *>(sender());
|
|
|
QPieSeries *detailsDonut = detailedData.at(slice->series()->slices().indexOf(slice));
|
|
|
detailsDonut->setPieEndAngle(slice->startAngle() + slice->angleSpan());
|
|
|
}
|
|
|
//! [7]
|
|
|
|
|
|
//! [8]
|
|
|
void Widget::highlight()
|
|
|
{
|
|
|
// choose one random detailed data slice to be updated.
|
|
|
detailIndex = qrand() % mainData->count();
|
|
|
sliceIndex = qrand() % detailedData.at(detailIndex)->count();
|
|
|
|
|
|
// set the slice to exploded to make the change easier to observe
|
|
|
detailedData.at(detailIndex)->slices().at(sliceIndex)->setExploded();
|
|
|
|
|
|
// give the user time to focus on the slice that will be changed
|
|
|
QTimer::singleShot(1000, this, SLOT(updateRotation()));
|
|
|
}
|
|
|
|
|
|
void Widget::updateRotation()
|
|
|
{
|
|
|
// update the selected slice
|
|
|
qreal newValue = 10 + qrand() % 100;
|
|
|
detailedData.at(detailIndex)->slices().at(sliceIndex)->setValue(newValue);
|
|
|
detailedData.at(detailIndex)->slices().at(sliceIndex)->setLabel(QString("%1").arg(newValue));
|
|
|
|
|
|
// update the mainData slice with a new sum of the detailed data values
|
|
|
mainData->slices().at(detailIndex)->setValue(detailedData.at(detailIndex)->sum());
|
|
|
mainData->slices().at(detailIndex)->setLabel(QString("%1").arg(detailedData.at(detailIndex)->sum()));
|
|
|
|
|
|
// change the explode state of the selected slice back to normal
|
|
|
detailedData.at(detailIndex)->slices().at(sliceIndex)->setExploded(false);
|
|
|
}
|
|
|
//! [8]
|
|
|
|
