##// END OF EJS Templates
HG_REPOSITORIES » LPP » INSTRUMENTATION » USERS » JEANDET » qtcharts
RSS

Clone from http://code.qt.io/qt/qtcharts.git

donutbreakdown example now has customized legendmarkers
Jani Honkonen -
r2233:222c26d04db8
parent child
Show More
Side by Side Unified
Context file:
r2233:222c26d04db8 Loading diff...:
Show file before | Show file after | Hide comments
@@ -0,0 +1,57
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
Show file before | Show file after | Hide comments
@@ -0,0 +1,48
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
Show file before | Show file after | Hide comments
@@ -29,6 +29,15
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
Show file before | Show file after | Hide comments
@@ -4,7 +4,9
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
Show file before | Show file after | Hide comments
@@ -18,7 +18,9
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
@@ -27,23 +29,29 DonutBreakdownChart::DonutBreakdownChart(QGraphicsItem *parent, Qt::WindowFlags
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);
@@ -52,7 +60,7 void DonutBreakdownChart::addBreakdownSeries(QPieSeries *breakdownSeries, QColor
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
@@ -60,6 +68,9 void DonutBreakdownChart::addBreakdownSeries(QPieSeries *breakdownSeries, QColor
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
@@ -67,28 +78,33 void DonutBreakdownChart::addBreakdownSeries(QPieSeries *breakdownSeries, QColor
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);
81 foreach (QPieSlice *slice, m_mainSeries->slices()) {
82 QPieSeries *breakdownSeries = qobject_cast<MainSlice *>(slice)->breakdownSeries();
83 breakdownSeries->setPieStartAngle(angle);
74 84 angle += slice->percentage() * 360.0; // full pie is 360.0
75 s->setPieEndAngle(angle);
76 }
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]
Show file before | Show file after | Hide comments
@@ -33,10 +33,10 public:
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
Show file before | Show file after | Hide comments
@@ -58,7 +58,7 int main(int argc, char *argv[])
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);
@@ -69,7 +69,7 int main(int argc, char *argv[])
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
General Comments 0
You need to be logged in to leave comments. Login now