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Add drilldown example for piechart
Jani Honkonen -
r406:d88edf82390f
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@@ -0,0 +1,126
1 #include <QtGui/QApplication>
2 #include <QMainWindow>
3 #include <qchartglobal.h>
4 #include <qchartview.h>
5 #include <qpieseries.h>
6 #include <qpieslice.h>
7 #include <QTime>
8
9 QTCOMMERCIALCHART_USE_NAMESPACE
10
11 class DrilldownSlice : public QPieSlice
12 {
13 Q_OBJECT
14
15 public:
16 DrilldownSlice(qreal value, QString prefix, QSeries* drilldownSeries)
17 :m_drilldownSeries(drilldownSeries),
18 m_prefix(prefix)
19 {
20 setValue(value);
21 setLabelVisible(true);
22 updateLabel();
23 connect(this, SIGNAL(changed()), this, SLOT(updateLabel()));
24 }
25
26 QSeries* drilldownSeries() const { return m_drilldownSeries; }
27
28 public Q_SLOTS:
29 void updateLabel()
30 {
31 QString label = m_prefix;
32 label += " - " + QString::number(this->value())+ "e (";
33 label += QString::number(this->percentage()*100, 'f', 1) + "%)";
34 qDebug() << "updateLabel" << label;
35 setLabel(label);
36 }
37
38 private:
39 QSeries* m_drilldownSeries;
40 QString m_prefix;
41 };
42
43 class DrilldownChart : public QChartView
44 {
45 Q_OBJECT
46 public:
47 explicit DrilldownChart(QWidget *parent = 0):QChartView(parent), m_currentSeries(0) {}
48
49 void changeSeries(QSeries* series)
50 {
51 if (m_currentSeries)
52 removeSeries(m_currentSeries);
53 m_currentSeries = series;
54 addSeries(series);
55 setChartTitle(series->title());
56 }
57
58 public Q_SLOTS:
59 void handleSliceClicked(QPieSlice* slice)
60 {
61 DrilldownSlice* drilldownSlice = static_cast<DrilldownSlice*>(slice);
62 changeSeries(drilldownSlice->drilldownSeries());
63 }
64
65 private:
66 QSeries* m_currentSeries;
67 };
68
69 int main(int argc, char *argv[])
70 {
71 QApplication a(argc, argv);
72
73 qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
74
75 QMainWindow window;
76
77 DrilldownChart* drilldownChart = new DrilldownChart(&window);
78 drilldownChart->setRenderHint(QPainter::Antialiasing);
79 drilldownChart->setChartTheme(QChart::ChartThemeVanilla);
80
81 QPieSeries* yearSeries = new QPieSeries(drilldownChart);
82 yearSeries->setTitle("Sales by year - All");
83 yearSeries->setHoverHighlighting();
84
85 QList<QString> months;
86 months << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun" << "Jul" << "Aug" << "Sep" << "Oct" << "Nov" << "Dec";
87
88 int max = 1000;
89
90 QPieSeries* monthSeriesJane = new QPieSeries(drilldownChart);
91 monthSeriesJane->setTitle("Sales by month - Jane");
92 monthSeriesJane->setHoverHighlighting();
93 foreach (QString month, months)
94 *monthSeriesJane << new DrilldownSlice(qrand() % max, month, yearSeries);
95
96 QPieSeries* monthSeriesJohn = new QPieSeries(drilldownChart);
97 monthSeriesJohn->setTitle("Sales by month - John");
98 monthSeriesJohn->setHoverHighlighting();
99 foreach (QString month, months)
100 *monthSeriesJohn << new DrilldownSlice(qrand() % max, month, yearSeries);
101
102 QPieSeries* monthSeriesAxel = new QPieSeries(drilldownChart);
103 monthSeriesAxel->setTitle("Sales by month - Axel");
104 monthSeriesAxel->setHoverHighlighting();
105 foreach (QString month, months)
106 *monthSeriesAxel << new DrilldownSlice(qrand() % max, month, yearSeries);
107
108 *yearSeries << new DrilldownSlice(monthSeriesJane->total(), "Jane", monthSeriesJane);
109 *yearSeries << new DrilldownSlice(monthSeriesJohn->total(), "John", monthSeriesJohn);
110 *yearSeries << new DrilldownSlice(monthSeriesAxel->total(), "Axel", monthSeriesAxel);
111
112 QObject::connect(monthSeriesJane, SIGNAL(clicked(QPieSlice*)), drilldownChart, SLOT(handleSliceClicked(QPieSlice*)));
113 QObject::connect(monthSeriesJohn, SIGNAL(clicked(QPieSlice*)), drilldownChart, SLOT(handleSliceClicked(QPieSlice*)));
114 QObject::connect(monthSeriesAxel, SIGNAL(clicked(QPieSlice*)), drilldownChart, SLOT(handleSliceClicked(QPieSlice*)));
115 QObject::connect(yearSeries, SIGNAL(clicked(QPieSlice*)), drilldownChart, SLOT(handleSliceClicked(QPieSlice*)));
116
117 drilldownChart->changeSeries(yearSeries);
118
119 window.setCentralWidget(drilldownChart);
120 window.resize(600, 600);
121 window.show();
122
123 return a.exec();
124 }
125
126 #include "main.moc"
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@@ -0,0 +1,9
1 !include( ../example.pri ) {
2 error( "Couldn't find the example.pri file!" )
3 }
4 TARGET = piechartdrilldown
5 SOURCES += main.cpp
6 HEADERS +=
7
8
9 MOC_DIR = $$PWD/moc
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@@ -7,6 +7,7 SUBDIRS += linechart \
7 7 percentbarchart \
8 8 scatter \
9 9 piechart \
10 piechartdrilldown \
10 11 dynamiclinechart \
11 12 axischart \
12 13 multichart \
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@@ -188,6 +188,12 void QPieSeries::add(QPieSlice* slice)
188 188 add(QList<QPieSlice*>() << slice);
189 189 }
190 190
191 QPieSeries& QPieSeries::operator << (QPieSlice* slice)
192 {
193 add(slice);
194 return *this;
195 }
196
191 197
192 198 /*!
193 199 Adds a single slice to the series with give \a value and \a name.
@@ -348,10 +354,7 void QPieSeries::setClickExplodes(bool enable)
348 354 Convenience method for highlighting a slice when user hovers over the slice.
349 355 It changes the slice color to be lighter and shows the label of the slice.
350 356 Set \a enable to true to highlight a slice when user hovers on top of it.
351
352 \sa QPieSlice::isExploded(), QPieSlice::setExploded()
353 357 */
354
355 358 void QPieSeries::setHoverHighlighting(bool enable)
356 359 {
357 360 if (enable) {
@@ -364,6 +367,16 void QPieSeries::setHoverHighlighting(bool enable)
364 367 }
365 368
366 369 /*!
370 Returns the sum of all slice values in this series.
371
372 \sa QPieSlice::value(), QPieSlice::setValue()
373 */
374 qreal QPieSeries::total() const
375 {
376 return m_total;
377 }
378
379 /*!
367 380 \fn void QPieSeries::changed(const QPieSeries::ChangeSet& changeSet)
368 381
369 382 This signal emitted when something has changed in the series.
@@ -456,7 +469,6 void QPieSeries::highlightOn(QPieSlice* slice)
456 469 Q_ASSERT(slice);
457 470 QColor c = slice->brush().color().lighter();
458 471 slice->setBrush(c);
459 slice->setLabelVisible(true);
460 472 }
461 473
462 474 void QPieSeries::highlightOff(QPieSlice* slice)
@@ -464,7 +476,6 void QPieSeries::highlightOff(QPieSlice* slice)
464 476 Q_ASSERT(slice);
465 477 QColor c = slice->brush().color().darker(150);
466 478 slice->setBrush(c);
467 slice->setLabelVisible(false);
468 479 }
469 480
470 481 void QPieSeries::updateDerivativeData()
@@ -480,7 +491,10 void QPieSeries::updateDerivativeData()
480 491 m_total += s->value();
481 492
482 493 // we must have some values
494 if (m_total == 0) {
495 qDebug() << "QPieSeries::updateDerivativeData() total == 0";
483 496 Q_ASSERT(m_total > 0); // TODO: is this the correct way to handle this?
497 }
484 498
485 499 // update slice attributes
486 500 qreal sliceAngle = m_pieStartAngle;
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@@ -62,6 +62,7 public:
62 62 void add(QList<QPieSlice*> slices);
63 63 void add(QPieSlice* slice);
64 64 QPieSlice* add(qreal value, QString name);
65 QPieSeries& operator << (QPieSlice* slice);
65 66 void remove(QPieSlice* slice);
66 67 void clear();
67 68
@@ -78,6 +79,8 public:
78 79 void setClickExplodes(bool enable = true);
79 80 void setHoverHighlighting(bool enable = true);
80 81
82 qreal total() const;
83
81 84 // TODO: find slices?
82 85 // QList<QPieSlice*> findByValue(qreal value);
83 86 // ...
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