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1 | 1 | #include "donutbreakdownchart.h" |
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2 | 2 | #include <QPieSlice> |
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3 | 3 | |
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4 | 4 | QTCOMMERCIALCHART_USE_NAMESPACE |
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5 | 5 | |
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6 | 6 | //![1] |
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7 | 7 | DonutBreakdownChart::DonutBreakdownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags) |
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8 | 8 | :QChart(parent, wFlags) |
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9 | 9 | { |
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10 | 10 | // create the series for main center pie |
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11 | 11 | mainSeries = new QPieSeries(); |
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12 | 12 | mainSeries->setPieSize(0.7); |
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13 | 13 | QChart::addSeries(mainSeries); |
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14 | 14 | } |
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15 | 15 | //![1] |
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16 | 16 | |
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17 | 17 | //![2] |
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18 | 18 | void DonutBreakdownChart::addBreakdownSeries(QPieSeries *breakdownSeries, QColor color) |
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19 | 19 | { |
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20 | 20 | // add breakdown series as a slice to center pie |
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21 | 21 | QPieSlice *slice = mainSeries->append(breakdownSeries->name(), breakdownSeries->sum()); |
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22 | 22 | |
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23 | 23 | // customize the slice |
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24 | 24 | slice->setBrush(color); |
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25 | 25 | slice->setLabelVisible(); |
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26 | 26 | slice->setLabelColor(Qt::white); |
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27 | 27 | slice->setLabelPosition(QPieSlice::LabelInsideHorizontal); |
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28 | 28 | |
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29 | 29 | // position and customize the breakdown series |
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30 | 30 | breakdownSeries->setPieSize(0.8); |
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31 | 31 | breakdownSeries->setHoleSize(0.7); |
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32 | 32 | breakdownSeries->setLabelsVisible(); |
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33 | 33 | foreach (QPieSlice *slice, breakdownSeries->slices()) { |
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34 |
color = color.lighter(11 |
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34 | color = color.lighter(115); | |
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35 | 35 | slice->setBrush(color); |
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36 | 36 | slice->setLabelFont(QFont("Arial", 8)); |
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37 | slice->setLabelArmLengthFactor(0.05); | |
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38 | 37 | } |
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39 | 38 | |
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40 | 39 | // add the series to the chart |
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41 | 40 | QChart::addSeries(breakdownSeries); |
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42 | 41 | |
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43 | 42 | // recalculate breakdown donut segments |
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44 | 43 | recalculateAngles(); |
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45 | 44 | } |
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46 | 45 | //![2] |
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47 | 46 | |
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48 | 47 | //![3] |
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49 | 48 | void DonutBreakdownChart::recalculateAngles() |
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50 | 49 | { |
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51 | 50 | qreal angle = 0; |
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52 | 51 | foreach (QPieSlice *slice, mainSeries->slices()) { |
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53 | 52 | QPieSeries *s = find(slice->label()); |
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54 | 53 | if (s) { |
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55 | 54 | s->setPieStartAngle(angle); |
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56 | 55 | angle += slice->percentage() * 360.0; // full pie is 360.0 |
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57 | 56 | s->setPieEndAngle(angle); |
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58 | 57 | } |
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59 | 58 | } |
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60 | 59 | } |
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61 | 60 | //![3] |
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62 | 61 | |
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63 | 62 | //![4] |
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64 | 63 | QPieSeries *DonutBreakdownChart::find(QString seriesName) const |
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65 | 64 | { |
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66 | 65 | // find pieseries by name |
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67 | 66 | foreach (QAbstractSeries *series, QChart::series()) { |
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68 | 67 | QPieSeries *s = qobject_cast<QPieSeries*>(series); |
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69 | 68 | if (!s) |
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70 | 69 | continue; |
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71 | 70 | if (s->name() == seriesName) |
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72 | 71 | return s; |
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73 | 72 | } |
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74 | 73 | return 0; |
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75 | 74 | } |
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76 | 75 | //![4] |
| @@ -1,55 +1,55 | |||
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1 | 1 | #include <QApplication> |
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2 | 2 | #include <QMainWindow> |
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3 | 3 | #include <QChartView> |
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4 | 4 | #include "donutbreakdownchart.h" |
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5 | 5 | |
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6 | 6 | QTCOMMERCIALCHART_USE_NAMESPACE |
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7 | 7 | |
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8 | 8 | int main(int argc, char *argv[]) |
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9 | 9 | { |
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10 | 10 | QApplication a(argc, argv); |
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11 | 11 | |
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12 | 12 | //![1] |
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13 | 13 | // Data from http://www.stat.fi/til/ekul/2010/ekul_2010_2011-12-13_tie_001_en.html |
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14 | 14 | |
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15 | 15 | QPieSeries *series1 = new QPieSeries(); |
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16 | series1->setName("Fossil"); | |
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16 | series1->setName("Fossil fuels"); | |
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17 | 17 | series1->append("Oil", 353295); |
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18 | series1->append("Wood", 319663); | |
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19 | 18 | series1->append("Coal", 188500); |
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20 | 19 | series1->append("Natural gas", 148680); |
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21 | 20 | series1->append("Peat", 94545); |
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22 | 21 | |
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23 | 22 | QPieSeries *series2 = new QPieSeries(); |
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24 | series2->setName("Renewable"); | |
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23 | series2->setName("Renewables"); | |
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24 | series2->append("Wood fuels", 319663); | |
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25 | 25 | series2->append("Hydro power", 45875); |
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26 | 26 | series2->append("Wind power", 1060); |
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27 | 27 | |
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28 | 28 | QPieSeries *series3 = new QPieSeries(); |
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29 | series3->setName("Other"); | |
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29 | series3->setName("Others"); | |
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30 | 30 | series3->append("Nuclear energy", 238789); |
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31 | 31 | series3->append("Import energy", 37802); |
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32 |
series3->append("Other |
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32 | series3->append("Other", 32441); | |
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33 | 33 | //![1] |
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34 | 34 | |
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35 | 35 | //![2] |
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36 | 36 | DonutBreakdownChart *donutBreakdown = new DonutBreakdownChart(); |
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37 | 37 | donutBreakdown->setAnimationOptions(QChart::AllAnimations); |
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38 | 38 | donutBreakdown->setTitle("Total consumption of energy in Finland 2010"); |
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39 | 39 | donutBreakdown->legend()->setVisible(false); |
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40 | 40 | donutBreakdown->addBreakdownSeries(series1, Qt::red); |
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41 | 41 | donutBreakdown->addBreakdownSeries(series2, Qt::darkGreen); |
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42 | 42 | donutBreakdown->addBreakdownSeries(series3, Qt::darkBlue); |
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43 | 43 | //![2] |
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44 | 44 | |
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45 | 45 | //![3] |
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46 | 46 | QMainWindow window; |
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47 | 47 | QChartView* chartView = new QChartView(donutBreakdown); |
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48 | 48 | chartView->setRenderHint(QPainter::Antialiasing); |
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49 | 49 | window.setCentralWidget(chartView); |
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50 | 50 | window.resize(800, 600); |
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51 | 51 | window.show(); |
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52 | 52 | //![3] |
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53 | 53 | |
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54 | 54 | return a.exec(); |
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55 | 55 | } |
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