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Updated QML donut screenshot
Updated QML donut screenshot
Marek Rosa - - Load All Authors

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r1843:6278eeca74fc
r1856:0b0a73ba4fad
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widget.cpp
139 lines | 4.5 KiB | text/x-c | CppLexer
/ examples / donutbreakdown / widget.cpp
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Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 #include "widget.h"
#include <QGridLayout>
#include <QPieSlice>
#include <QTime>
#include <QChartView>
Marek Rosa
Donut support simplified. Examples updated
 r1838 #include <QChart>
#include <QLegend>
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 #include <QTimer>
QTCOMMERCIALCHART_USE_NAMESPACE
Widget::Widget(QWidget *parent)
: QWidget(parent),
mainData(0)
{
setMinimumSize(800, 600);
qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [1]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 QChartView *chartView = new QChartView;
chartView->setRenderHint(QPainter::Antialiasing);
Marek Rosa
Donut support simplified. Examples updated
 r1838 QChart *chart = chartView->chart();
chart->setAnimationOptions(QChart::AllAnimations);
chart->legend()->setVisible(false);
Marek Rosa
Added titles to donut examples
 r1843 chart->setTitle("Donut breakdown example");
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [1]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [2]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 mainData = new QPieSeries;
Marek Rosa
Added one more type of label placing on Pie chart
 r1712 mainData->setPieSize(0.6);
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [2]
//! [3]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 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;
Marek Rosa
Donut support simplified. Examples updated
 r1838 donut->setHoleSize(mainData->pieSize());
Marek Rosa
Added one more type of label placing on Pie chart
 r1712 donut->setPieSize(mainData->pieSize() + 0.15);
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697
// 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);
}
Marek Rosa
Added one more type of label placing on Pie chart
 r1712 donut->setLabelsPosition(QPieSlice::LabelOutside);
donut->setLabelsVisible();
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 detailedData.append(donut);
// update the value and label of mainData
slice->setValue(donut->sum());
slice->setLabel(QString("%1").arg(donut->sum()));
}
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [3]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [4]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 mainData->setLabelsVisible();
Jani Honkonen
QPieSlice::LabelInside -> LabelInsideHorizontal
 r1759 mainData->setLabelsPosition(QPieSlice::LabelInsideHorizontal);
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 chartView->chart()->addSeries(mainData);
for (int i = 0; i < detailedData.count(); i++)
chartView->chart()->addSeries(detailedData.at(i));
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [4]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [5]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 // create main layout
QGridLayout* mainLayout = new QGridLayout;
mainLayout->addWidget(chartView, 1, 1);
setLayout(mainLayout);
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [5]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [6]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 // 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);
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [6]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 }
Widget::~Widget()
{
}
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [7]
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697 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());
}
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [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()));
}
Marek Rosa
Removed QDonutGroup class. Added Donut Drill down example
 r1697
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);
}
Marek Rosa
Documented the donutdrilldown chart example
 r1714 //! [8]