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donutbreakdown example now has customized legendmarkers
Jani Honkonen -
r2233:222c26d04db8
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1 /****************************************************************************
2 **
3 ** Copyright (C) 2012 Digia Plc
4 ** All rights reserved.
5 ** For any questions to Digia, please use contact form at http://qt.digia.com
6 **
7 ** This file is part of the Qt Commercial Charts Add-on.
8 **
9 ** $QT_BEGIN_LICENSE$
10 ** Licensees holding valid Qt Commercial licenses may use this file in
11 ** accordance with the Qt Commercial License Agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and Digia.
14 **
15 ** If you have questions regarding the use of this file, please use
16 ** contact form at http://qt.digia.com
17 ** $QT_END_LICENSE$
18 **
19 ****************************************************************************/
20
21 #include "mainslice.h"
22
23 QTCOMMERCIALCHART_USE_NAMESPACE
24
25 //![1]
26 MainSlice::MainSlice(QPieSeries *breakdownSeries, QObject *parent)
27 : QPieSlice(parent),
28 m_breakdownSeries(breakdownSeries)
29 {
30 connect(this, SIGNAL(percentageChanged()), this, SLOT(updateLabel()));
31 }
32 //![1]
33
34 QPieSeries *MainSlice::breakdownSeries() const
35 {
36 return m_breakdownSeries;
37 }
38
39 void MainSlice::setName(QString name)
40 {
41 m_name = name;
42 }
43
44 QString MainSlice::name() const
45 {
46 return m_name;
47 }
48
49 //![2]
50 void MainSlice::updateLabel()
51 {
52 this->setLabel(QString("%1 %2%").arg(m_name).arg(percentage() * 100, 0, 'f', 2));
53 }
54 //![2]
55
56 #include "moc_mainslice.cpp"
57
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1 /****************************************************************************
2 **
3 ** Copyright (C) 2012 Digia Plc
4 ** All rights reserved.
5 ** For any questions to Digia, please use contact form at http://qt.digia.com
6 **
7 ** This file is part of the Qt Commercial Charts Add-on.
8 **
9 ** $QT_BEGIN_LICENSE$
10 ** Licensees holding valid Qt Commercial licenses may use this file in
11 ** accordance with the Qt Commercial License Agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and Digia.
14 **
15 ** If you have questions regarding the use of this file, please use
16 ** contact form at http://qt.digia.com
17 ** $QT_END_LICENSE$
18 **
19 ****************************************************************************/
20
21 #ifndef MAINSLICE_H
22 #define MAINSLICE_H
23
24 #include <QPieSlice>
25 #include <QPieSeries>
26
27 QTCOMMERCIALCHART_USE_NAMESPACE
28
29 class MainSlice : public QPieSlice
30 {
31 Q_OBJECT
32 public:
33 MainSlice(QPieSeries *breakdownSeries, QObject *parent = 0);
34
35 QPieSeries *breakdownSeries() const;
36
37 void setName(QString name);
38 QString name() const;
39
40 public Q_SLOTS:
41 void updateLabel();
42
43 private:
44 QPieSeries *m_breakdownSeries;
45 QString m_name;
46 };
47
48 #endif // MAINSLICE_H
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1 1 /*!
2 2 \example examples/donutbreakdown
3 3 \title Donut chart breakdown example
4 4 \subtitle
5 5
6 6 This example shows how to use create a donut breakdown chart using QPieSeries API.
7 7 \image examples_donutbreakdown.png
8 8
9 9 Let's start by defining some data for the chart.
10 10
11 11 \snippet ../examples/donutbreakdown/main.cpp 1
12 12
13 13 Then we create a chart where we add the data. Note that this is our own chart derived from QChart.
14 14
15 15 \snippet ../examples/donutbreakdown/main.cpp 2
16 16
17 17 Our own chart works so that in the constructor we create a main series
18 18 which aggregates the data provided by the breakdown series. This is the piechart in the center.
19 19
20 20 \snippet ../examples/donutbreakdown/donutbreakdownchart.cpp 1
21 21
22 22 When a breakdown series is added the data is used to create a slice in the main series and the
23 23 breakdown series itself is used to create a segment of a donut positioned so that it is aligned
24 24 with the corresponding slice in the main series.
25 25
26 26 \snippet ../examples/donutbreakdown/donutbreakdownchart.cpp 2
27 27
28 28 Here's how the start and end angles for the donut segments are calculated.
29 29
30 30 \snippet ../examples/donutbreakdown/donutbreakdownchart.cpp 3
31 31
32 Legend markers are customized to show the breakdown percentage and markers for the main level slices are hidden.
33
34 \snippet ../examples/donutbreakdown/donutbreakdownchart.cpp 4
35
36 Instead the main level slices show the percentage on the label.
37
38 \snippet ../examples/donutbreakdown/mainslice.cpp 1
39 \snippet ../examples/donutbreakdown/mainslice.cpp 2
40
32 41 And now that we have our chart defined we can finally create a QChartView and show the chart.
33 42
34 43 \snippet ../examples/donutbreakdown/main.cpp 3
35 44
36 45 */
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1 1 !include( ../examples.pri ) {
2 2 error( "Couldn't find the examples.pri file!" )
3 3 }
4 4
5 5 TARGET = donutbreakdown
6 6 SOURCES += main.cpp\
7 donutbreakdownchart.cpp
7 donutbreakdownchart.cpp \
8 mainslice.cpp
8 9
9 10 HEADERS += \
10 donutbreakdownchart.h
11 donutbreakdownchart.h \
12 mainslice.h
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@@ -1,94 +1,110
1 1 /****************************************************************************
2 2 **
3 3 ** Copyright (C) 2012 Digia Plc
4 4 ** All rights reserved.
5 5 ** For any questions to Digia, please use contact form at http://qt.digia.com
6 6 **
7 7 ** This file is part of the Qt Commercial Charts Add-on.
8 8 **
9 9 ** $QT_BEGIN_LICENSE$
10 10 ** Licensees holding valid Qt Commercial licenses may use this file in
11 11 ** accordance with the Qt Commercial License Agreement provided with the
12 12 ** Software or, alternatively, in accordance with the terms contained in
13 13 ** a written agreement between you and Digia.
14 14 **
15 15 ** If you have questions regarding the use of this file, please use
16 16 ** contact form at http://qt.digia.com
17 17 ** $QT_END_LICENSE$
18 18 **
19 19 ****************************************************************************/
20 20 #include "donutbreakdownchart.h"
21 #include "mainslice.h"
21 22 #include <QPieSlice>
23 #include <QPieLegendMarker>
22 24
23 25 QTCOMMERCIALCHART_USE_NAMESPACE
24 26
25 27 //![1]
26 28 DonutBreakdownChart::DonutBreakdownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
27 29 : QChart(parent, wFlags)
28 30 {
29 31 // create the series for main center pie
30 mainSeries = new QPieSeries();
31 mainSeries->setPieSize(0.7);
32 QChart::addSeries(mainSeries);
32 m_mainSeries = new QPieSeries();
33 m_mainSeries->setPieSize(0.7);
34 QChart::addSeries(m_mainSeries);
33 35 }
34 36 //![1]
35 37
36 38 //![2]
37 39 void DonutBreakdownChart::addBreakdownSeries(QPieSeries *breakdownSeries, QColor color)
38 40 {
41 QFont font("Arial", 8);
42
39 43 // add breakdown series as a slice to center pie
40 QPieSlice *slice = mainSeries->append(breakdownSeries->name(), breakdownSeries->sum());
44 MainSlice *mainSlice = new MainSlice(breakdownSeries);
45 mainSlice->setName(breakdownSeries->name());
46 mainSlice->setValue(breakdownSeries->sum());
47 m_mainSeries->append(mainSlice);
41 48
42 49 // customize the slice
43 slice->setBrush(color);
44 slice->setLabelVisible();
45 slice->setLabelColor(Qt::white);
46 slice->setLabelPosition(QPieSlice::LabelInsideHorizontal);
50 mainSlice->setBrush(color);
51 mainSlice->setLabelVisible();
52 mainSlice->setLabelColor(Qt::white);
53 mainSlice->setLabelPosition(QPieSlice::LabelInsideHorizontal);
54 mainSlice->setLabelFont(font);
47 55
48 56 // position and customize the breakdown series
49 57 breakdownSeries->setPieSize(0.8);
50 58 breakdownSeries->setHoleSize(0.7);
51 59 breakdownSeries->setLabelsVisible();
52 60 foreach (QPieSlice *slice, breakdownSeries->slices()) {
53 61 color = color.lighter(115);
54 62 slice->setBrush(color);
55 slice->setLabelFont(QFont("Arial", 8));
63 slice->setLabelFont(font);
56 64 }
57 65
58 66 // add the series to the chart
59 67 QChart::addSeries(breakdownSeries);
60 68
61 69 // recalculate breakdown donut segments
62 70 recalculateAngles();
71
72 // update customize legend markers
73 updateLegendMarkers();
63 74 }
64 75 //![2]
65 76
66 77 //![3]
67 78 void DonutBreakdownChart::recalculateAngles()
68 79 {
69 80 qreal angle = 0;
70 foreach (QPieSlice *slice, mainSeries->slices()) {
71 QPieSeries *s = find(slice->label());
72 if (s) {
73 s->setPieStartAngle(angle);
74 angle += slice->percentage() * 360.0; // full pie is 360.0
75 s->setPieEndAngle(angle);
76 }
81 foreach (QPieSlice *slice, m_mainSeries->slices()) {
82 QPieSeries *breakdownSeries = qobject_cast<MainSlice *>(slice)->breakdownSeries();
83 breakdownSeries->setPieStartAngle(angle);
84 angle += slice->percentage() * 360.0; // full pie is 360.0
85 breakdownSeries->setPieEndAngle(angle);
77 86 }
78 87 }
79 88 //![3]
80 89
81 90 //![4]
82 QPieSeries *DonutBreakdownChart::find(QString seriesName) const
91 void DonutBreakdownChart::updateLegendMarkers()
83 92 {
84 // find pieseries by name
93 // go through all markers
85 94 foreach (QAbstractSeries *series, QChart::series()) {
86 QPieSeries *s = qobject_cast<QPieSeries*>(series);
87 if (!s)
88 continue;
89 if (s->name() == seriesName)
90 return s;
95 foreach (QLegendMarker *marker, legend()->markers(series)) {
96 QPieLegendMarker *pieMarker = qobject_cast<QPieLegendMarker *>(marker);
97 if (series == m_mainSeries) {
98 // hide markers from main series
99 pieMarker->setVisible(false);
100 } else {
101 // modify markers from breakdown series
102 pieMarker->setLabel(QString("%1 %2%")
103 .arg(pieMarker->slice()->label())
104 .arg(pieMarker->slice()->percentage() * 100, 0, 'f', 2));
105 pieMarker->setFont(QFont("Arial", 8));
106 }
107 }
91 108 }
92 return 0;
93 109 }
94 110 //![4]
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1 1 /****************************************************************************
2 2 **
3 3 ** Copyright (C) 2012 Digia Plc
4 4 ** All rights reserved.
5 5 ** For any questions to Digia, please use contact form at http://qt.digia.com
6 6 **
7 7 ** This file is part of the Qt Commercial Charts Add-on.
8 8 **
9 9 ** $QT_BEGIN_LICENSE$
10 10 ** Licensees holding valid Qt Commercial licenses may use this file in
11 11 ** accordance with the Qt Commercial License Agreement provided with the
12 12 ** Software or, alternatively, in accordance with the terms contained in
13 13 ** a written agreement between you and Digia.
14 14 **
15 15 ** If you have questions regarding the use of this file, please use
16 16 ** contact form at http://qt.digia.com
17 17 ** $QT_END_LICENSE$
18 18 **
19 19 ****************************************************************************/
20 20 #ifndef DONUTBREAKDOWNCHART_H
21 21 #define DONUTBREAKDOWNCHART_H
22 22
23 23 #include <QChart>
24 24 #include <QPieSeries>
25 25
26 26 QTCOMMERCIALCHART_USE_NAMESPACE
27 27
28 28 class DonutBreakdownChart : public QChart
29 29 {
30 30 public:
31 31 DonutBreakdownChart(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0);
32 32 void addBreakdownSeries(QPieSeries *series, QColor color);
33 33
34 34 private:
35 35 void recalculateAngles();
36 QPieSeries *find(QString seriesName) const;
36 void updateLegendMarkers();
37 37
38 38 private:
39 QPieSeries *mainSeries;
39 QPieSeries *m_mainSeries;
40 40 };
41 41
42 42 #endif // DONUTBREAKDOWNCHART_H
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1 1 /****************************************************************************
2 2 **
3 3 ** Copyright (C) 2012 Digia Plc
4 4 ** All rights reserved.
5 5 ** For any questions to Digia, please use contact form at http://qt.digia.com
6 6 **
7 7 ** This file is part of the Qt Commercial Charts Add-on.
8 8 **
9 9 ** $QT_BEGIN_LICENSE$
10 10 ** Licensees holding valid Qt Commercial licenses may use this file in
11 11 ** accordance with the Qt Commercial License Agreement provided with the
12 12 ** Software or, alternatively, in accordance with the terms contained in
13 13 ** a written agreement between you and Digia.
14 14 **
15 15 ** If you have questions regarding the use of this file, please use
16 16 ** contact form at http://qt.digia.com
17 17 ** $QT_END_LICENSE$
18 18 **
19 19 ****************************************************************************/
20 20 #include <QApplication>
21 21 #include <QMainWindow>
22 22 #include <QStatusBar>
23 23 #include <QChartView>
24 24 #include "donutbreakdownchart.h"
25 25
26 26 QTCOMMERCIALCHART_USE_NAMESPACE
27 27
28 28 int main(int argc, char *argv[])
29 29 {
30 30 QApplication a(argc, argv);
31 31
32 32 //![1]
33 33 // Graph is based on data of 'Total consumption of energy increased by 10 per cent in 2010'
34 34 // Statistics Finland, 13 December 2011
35 35 // http://www.stat.fi/til/ekul/2010/ekul_2010_2011-12-13_tie_001_en.html
36 36
37 37 QPieSeries *series1 = new QPieSeries();
38 38 series1->setName("Fossil fuels");
39 39 series1->append("Oil", 353295);
40 40 series1->append("Coal", 188500);
41 41 series1->append("Natural gas", 148680);
42 42 series1->append("Peat", 94545);
43 43
44 44 QPieSeries *series2 = new QPieSeries();
45 45 series2->setName("Renewables");
46 46 series2->append("Wood fuels", 319663);
47 47 series2->append("Hydro power", 45875);
48 48 series2->append("Wind power", 1060);
49 49
50 50 QPieSeries *series3 = new QPieSeries();
51 51 series3->setName("Others");
52 52 series3->append("Nuclear energy", 238789);
53 53 series3->append("Import energy", 37802);
54 54 series3->append("Other", 32441);
55 55 //![1]
56 56
57 57 //![2]
58 58 DonutBreakdownChart *donutBreakdown = new DonutBreakdownChart();
59 59 donutBreakdown->setAnimationOptions(QChart::AllAnimations);
60 60 donutBreakdown->setTitle("Total consumption of energy in Finland 2010");
61 donutBreakdown->legend()->setVisible(false);
61 donutBreakdown->legend()->setAlignment(Qt::AlignRight);
62 62 donutBreakdown->addBreakdownSeries(series1, Qt::red);
63 63 donutBreakdown->addBreakdownSeries(series2, Qt::darkGreen);
64 64 donutBreakdown->addBreakdownSeries(series3, Qt::darkBlue);
65 65 //![2]
66 66
67 67 //![3]
68 68 QMainWindow window;
69 69 QChartView *chartView = new QChartView(donutBreakdown);
70 70 chartView->setRenderHint(QPainter::Antialiasing);
71 71 window.setCentralWidget(chartView);
72 window.resize(800, 600);
72 window.resize(800, 500);
73 73 window.show();
74 74 //![3]
75 75
76 76 return a.exec();
77 77 }
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