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

Add drilldown example for piechart

Jani Honkonen -

r406:d88edf82390f

parent child

Context file:

r406:d88edf82390f

Collapse all files

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);
                 // ...

General Comments 0

Write
Preview

You need to be logged in to leave comments. Login now

No TODOs yet

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages