HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Commit - r406:d88edf82390f

Add drilldown example for piechart

Jani Honkonen -

r406:d88edf82390f

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r406:d88edf82390f

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example/piechartdrilldown/main.cpp created 644 +126 0

			@@ -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"

example/piechartdrilldown/piechartdrilldown.pro created 644 +9 0

			@@ -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

example/example.pro +1 0

                         percentbarchart \
                         scatter \
                         piechart \
+                        piechartdrilldown \
                         dynamiclinechart \
                         axischart \
                         multichart \

src/piechart/qpieseries.cpp +20 -6

                  add(QList<QPieSlice*>() << slice);
              }
+             QPieSeries& QPieSeries::operator << (QPieSlice* slice)
+             {
+                 add(slice);
+                 return *this;
+             }
              /*!
                  Adds a single slice to the series with give \a value and \a name.
                  Convenience method for highlighting a slice when user hovers over the slice.
                  It changes the slice color to be lighter and shows the label of the slice.
                  Set \a enable to true to highlight a slice when user hovers on top of it.
-                 \sa QPieSlice::isExploded(), QPieSlice::setExploded()
              */
              void QPieSeries::setHoverHighlighting(bool enable)
              {
                  if (enable) {
              }
              /*!
+                 Returns the sum of all slice values in this series.
+                 \sa QPieSlice::value(), QPieSlice::setValue()
+             */
+             qreal QPieSeries::total() const
+             {
+                 return m_total;
+             }
+             /*!
                  \fn void QPieSeries::changed(const QPieSeries::ChangeSet& changeSet)
                  This signal emitted when something has changed in the series.
                  Q_ASSERT(slice);
                  QColor c = slice->brush().color().lighter();
                  slice->setBrush(c);
-                 slice->setLabelVisible(true);
              }
              void QPieSeries::highlightOff(QPieSlice* slice)
                  Q_ASSERT(slice);
                  QColor c = slice->brush().color().darker(150);
                  slice->setBrush(c);
-                 slice->setLabelVisible(false);
              }
              void QPieSeries::updateDerivativeData()
                      m_total += s->value();
                  // we must have some values
-                 Q_ASSERT(m_total > 0); // TODO: is this the correct way to handle this?
+                 if (m_total == 0) {
+                     qDebug() << "QPieSeries::updateDerivativeData() total == 0";
+                     Q_ASSERT(m_total > 0); // TODO: is this the correct way to handle this?
+                 }
                  // update slice attributes
                  qreal sliceAngle = m_pieStartAngle;

src/piechart/qpieseries.h +3 0

                  void add(QList<QPieSlice*> slices);
                  void add(QPieSlice* slice);
                  QPieSlice* add(qreal value, QString name);
+                 QPieSeries& operator << (QPieSlice* slice);
                  void remove(QPieSlice* slice);
                  void clear();
                  void setClickExplodes(bool enable = true);
                  void setHoverHighlighting(bool enable = true);
+                 qreal total() const;
                  // TODO: find slices?
                  // QList<QPieSlice*> findByValue(qreal value);
                  // ...

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