##// END OF EJS Templates
Optimize polar chart radius calculation a bit....
Optimize polar chart radius calculation a bit. Current algorithm still results in an occasional extra unneeded iteration, as it uses only crude approximation for radius reduction. However, any speedup gained by accurately calculating needed reduction would be very minor compared to approximations used, so it doesn't seem worth the effort to figure out the complex math. Change-Id: If670a1b058a85cd0305b93f62e6388b463bafd0d Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

File last commit:

r2483:f494279b6366
r2542:189023d9a551
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chartdataset.cpp
607 lines | 17.4 KiB | text/x-c | CppLexer
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the Qt Commercial Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
****************************************************************************/
#include "chartdataset_p.h"
#include "chartpresenter_p.h"
#include "qchart.h"
#include "qchart_p.h"
#include "qvalueaxis.h"
#include "qbarcategoryaxis.h"
#include "qvalueaxis_p.h"
#include "qcategoryaxis.h"
#include "qabstractseries_p.h"
#include "qabstractbarseries.h"
#include "qstackedbarseries.h"
#include "qpercentbarseries.h"
#include "qpieseries.h"
#include "chartitem_p.h"
#include "xydomain_p.h"
#include "xypolardomain_p.h"
#include "xlogydomain_p.h"
#include "logxydomain_p.h"
#include "logxlogydomain_p.h"
#include "xlogypolardomain_p.h"
#include "logxypolardomain_p.h"
#include "logxlogypolardomain_p.h"
#ifndef QT_ON_ARM
#include "qdatetimeaxis.h"
#endif
QTCOMMERCIALCHART_BEGIN_NAMESPACE
ChartDataSet::ChartDataSet(QChart *chart)
: QObject(chart),
m_chart(chart)
{
}
ChartDataSet::~ChartDataSet()
{
deleteAllSeries();
deleteAllAxes();
}
/*
* This method adds series to chartdataset, series ownership is taken from caller.
*/
void ChartDataSet::addSeries(QAbstractSeries *series)
{
if (m_seriesList.contains(series)) {
qWarning() << QObject::tr("Can not add series. Series already on the chart.");
return;
}
// Ignore unsupported series added to polar chart
if (m_chart && m_chart->chartType() == QChart::ChartTypePolar) {
if (!(series->type() == QAbstractSeries::SeriesTypeArea
|| series->type() == QAbstractSeries::SeriesTypeLine
|| series->type() == QAbstractSeries::SeriesTypeScatter
|| series->type() == QAbstractSeries::SeriesTypeSpline)) {
qWarning() << QObject::tr("Can not add series. Series type is not supported by a polar chart.");
return;
}
series->d_ptr->setDomain(new XYPolarDomain());
} else {
series->d_ptr->setDomain(new XYDomain());
}
series->d_ptr->initializeDomain();
m_seriesList.append(series);
series->setParent(this); // take ownership
series->d_ptr->m_chart = m_chart;
emit seriesAdded(series);
}
/*
* This method adds axis to chartdataset, axis ownership is taken from caller.
*/
void ChartDataSet::addAxis(QAbstractAxis *axis, Qt::Alignment aligment)
{
if (m_axisList.contains(axis)) {
qWarning() << QObject::tr("Can not add axis. Axis already on the chart.");
return;
}
axis->d_ptr->setAlignment(aligment);
if (!axis->alignment()) {
qWarning() << QObject::tr("No alignment specified !");
return;
};
AbstractDomain *newDomain;
if (m_chart && m_chart->chartType() == QChart::ChartTypePolar) {
foreach (QAbstractAxis *existingAxis, axes()) {
if (existingAxis->orientation() == axis->orientation()) {
qWarning() << QObject::tr("Cannot add multiple axes of same orientation to a polar chart!");
return;
}
}
newDomain = new XYPolarDomain();
} else {
newDomain = new XYDomain();
}
QSharedPointer<AbstractDomain> domain(newDomain);
axis->d_ptr->initializeDomain(domain.data());
axis->setParent(this);
axis->d_ptr->m_chart = m_chart;
m_axisList.append(axis);
emit axisAdded(axis);
}
/*
* This method removes series form chartdataset, series ownership is passed back to caller.
*/
void ChartDataSet::removeSeries(QAbstractSeries *series)
{
if (! m_seriesList.contains(series)) {
qWarning() << QObject::tr("Can not remove series. Series not found on the chart.");
return;
}
QList<QAbstractAxis*> axes = series->d_ptr->m_axes;
foreach(QAbstractAxis* axis, axes) {
detachAxis(series,axis);
}
emit seriesRemoved(series);
m_seriesList.removeAll(series);
// Reset domain to default
series->d_ptr->setDomain(new XYDomain());
series->setParent(0);
series->d_ptr->m_chart = 0;
}
/*
* This method removes axis form chartdataset, series ownership is passed back to caller.
*/
void ChartDataSet::removeAxis(QAbstractAxis *axis)
{
if (! m_axisList.contains(axis)) {
qWarning() << QObject::tr("Can not remove axis. Axis not found on the chart.");
return;
}
QList<QAbstractSeries*> series = axis->d_ptr->m_series;
foreach(QAbstractSeries* s, series) {
detachAxis(s,axis);
}
emit axisRemoved(axis);
m_axisList.removeAll(axis);
axis->setParent(0);
axis->d_ptr->m_chart = 0;
}
/*
* This method attaches axis to series, return true if success.
*/
bool ChartDataSet::attachAxis(QAbstractSeries *series,QAbstractAxis *axis)
{
Q_ASSERT(series);
Q_ASSERT(axis);
QList<QAbstractSeries *> attachedSeriesList = axis->d_ptr->m_series;
QList<QAbstractAxis *> attachedAxisList = series->d_ptr->m_axes;
if (!m_seriesList.contains(series)) {
qWarning() << QObject::tr("Can not find series on the chart.");
return false;
}
if (axis && !m_axisList.contains(axis)) {
qWarning() << QObject::tr("Can not find axis on the chart.");
return false;
}
if (attachedAxisList.contains(axis)) {
qWarning() << QObject::tr("Axis already attached to series.");
return false;
}
if (attachedSeriesList.contains(series)) {
qWarning() << QObject::tr("Axis already attached to series.");
return false;
}
AbstractDomain *domain = series->d_ptr->domain();
AbstractDomain::DomainType type = selectDomain(attachedAxisList<<axis);
if (type == AbstractDomain::UndefinedDomain) return false;
if (domain->type() != type) {
AbstractDomain *old = domain;
domain = createDomain(type);
domain->setRange(old->minX(), old->maxX(), old->minY(), old->maxY());
// Initialize domain size to old domain size, as it won't get updated
// unless geometry changes.
domain->setSize(old->size());
}
if (!domain)
return false;
if (!domain->attachAxis(axis))
return false;
QList<AbstractDomain *> blockedDomains;
domain->blockRangeSignals(true);
blockedDomains << domain;
if (domain != series->d_ptr->domain()) {
foreach (QAbstractAxis *axis, series->d_ptr->m_axes) {
series->d_ptr->domain()->detachAxis(axis);
domain->attachAxis(axis);
foreach (QAbstractSeries *otherSeries, axis->d_ptr->m_series) {
if (otherSeries != series && otherSeries->d_ptr->domain()) {
if (!otherSeries->d_ptr->domain()->rangeSignalsBlocked()) {
otherSeries->d_ptr->domain()->blockRangeSignals(true);
blockedDomains << otherSeries->d_ptr->domain();
}
}
}
}
series->d_ptr->setDomain(domain);
series->d_ptr->initializeDomain();
}
series->d_ptr->m_axes<<axis;
axis->d_ptr->m_series<<series;
series->d_ptr->initializeAxes();
axis->d_ptr->initializeDomain(domain);
foreach (AbstractDomain *blockedDomain, blockedDomains)
blockedDomain->blockRangeSignals(false);
return true;
}
/*
* This method detaches axis to series, return true if success.
*/
bool ChartDataSet::detachAxis(QAbstractSeries* series,QAbstractAxis *axis)
{
Q_ASSERT(series);
Q_ASSERT(axis);
QList<QAbstractSeries* > attachedSeriesList = axis->d_ptr->m_series;
QList<QAbstractAxis* > attachedAxisList = series->d_ptr->m_axes;
AbstractDomain* domain = series->d_ptr->domain();
if (!m_seriesList.contains(series)) {
qWarning() << QObject::tr("Can not find series on the chart.");
return false;
}
if (axis && !m_axisList.contains(axis)) {
qWarning() << QObject::tr("Can not find axis on the chart.");
return false;
}
if (!attachedAxisList.contains(axis)) {
qWarning() << QObject::tr("Axis not attached to series.");
return false;
}
Q_ASSERT(axis->d_ptr->m_series.contains(series));
domain->detachAxis(axis);
series->d_ptr->m_axes.removeAll(axis);
axis->d_ptr->m_series.removeAll(series);
return true;
}
void ChartDataSet::createDefaultAxes()
{
if (m_seriesList.isEmpty())
return;
QAbstractAxis::AxisTypes typeX(0);
QAbstractAxis::AxisTypes typeY(0);
// Remove possibly existing axes
deleteAllAxes();
Q_ASSERT(m_axisList.isEmpty());
// Select the required axis x and axis y types based on the types of the current series
foreach(QAbstractSeries* s, m_seriesList) {
typeX |= s->d_ptr->defaultAxisType(Qt::Horizontal);
typeY |= s->d_ptr->defaultAxisType(Qt::Vertical);
}
// Create the axes of the types selected
createAxes(typeX, Qt::Horizontal);
createAxes(typeY, Qt::Vertical);
}
void ChartDataSet::createAxes(QAbstractAxis::AxisTypes type, Qt::Orientation orientation)
{
QAbstractAxis *axis = 0;
//decide what axis should be created
switch (type) {
case QAbstractAxis::AxisTypeValue:
axis = new QValueAxis(this);
break;
case QAbstractAxis::AxisTypeBarCategory:
axis = new QBarCategoryAxis(this);
break;
case QAbstractAxis::AxisTypeCategory:
axis = new QCategoryAxis(this);
break;
#ifndef Q_WS_QWS
case QAbstractAxis::AxisTypeDateTime:
axis = new QDateTimeAxis(this);
break;
#endif
default:
axis = 0;
break;
}
if (axis) {
//create one axis for all
addAxis(axis,orientation==Qt::Horizontal?Qt::AlignBottom:Qt::AlignLeft);
qreal min = 0;
qreal max = 0;
findMinMaxForSeries(m_seriesList,orientation,min,max);
foreach(QAbstractSeries *s, m_seriesList) {
attachAxis(s,axis);
}
axis->setRange(min,max);
}
else if (!type.testFlag(QAbstractAxis::AxisTypeNoAxis)) {
//create separate axis
foreach(QAbstractSeries *s, m_seriesList) {
QAbstractAxis *axis = s->d_ptr->createDefaultAxis(orientation);
if(axis) {
addAxis(axis,orientation==Qt::Horizontal?Qt::AlignBottom:Qt::AlignLeft);
attachAxis(s,axis);
}
}
}
}
void ChartDataSet::findMinMaxForSeries(QList<QAbstractSeries *> series,Qt::Orientations orientation, qreal &min, qreal &max)
{
Q_ASSERT(!series.isEmpty());
AbstractDomain *domain = series.first()->d_ptr->domain();
min = (orientation == Qt::Vertical) ? domain->minY() : domain->minX();
max = (orientation == Qt::Vertical) ? domain->maxY() : domain->maxX();
for (int i = 1; i< series.size(); i++) {
AbstractDomain *domain = series[i]->d_ptr->domain();
min = qMin((orientation == Qt::Vertical) ? domain->minY() : domain->minX(), min);
max = qMax((orientation == Qt::Vertical) ? domain->maxY() : domain->maxX(), max);
}
if (min == max) {
min -= 0.5;
max += 0.5;
}
}
void ChartDataSet::deleteAllSeries()
{
foreach (QAbstractSeries *s , m_seriesList){
removeSeries(s);
s->deleteLater();
}
Q_ASSERT(m_seriesList.count() == 0);
}
void ChartDataSet::deleteAllAxes()
{
foreach (QAbstractAxis *a , m_axisList){
removeAxis(a);
a->deleteLater();
}
Q_ASSERT(m_axisList.count() == 0);
}
void ChartDataSet::zoomInDomain(const QRectF &rect)
{
QList<AbstractDomain*> domains;
foreach(QAbstractSeries *s, m_seriesList) {
AbstractDomain* domain = s->d_ptr->domain();
s->d_ptr->m_domain->blockRangeSignals(true);
domains<<domain;
}
foreach(AbstractDomain *domain, domains)
domain->zoomIn(rect);
foreach(AbstractDomain *domain, domains)
domain->blockRangeSignals(false);
}
void ChartDataSet::zoomOutDomain(const QRectF &rect)
{
QList<AbstractDomain*> domains;
foreach(QAbstractSeries *s, m_seriesList) {
AbstractDomain* domain = s->d_ptr->domain();
s->d_ptr->m_domain->blockRangeSignals(true);
domains<<domain;
}
foreach(AbstractDomain *domain, domains)
domain->zoomOut(rect);
foreach(AbstractDomain *domain, domains)
domain->blockRangeSignals(false);
}
void ChartDataSet::scrollDomain(qreal dx, qreal dy)
{
QList<AbstractDomain*> domains;
foreach(QAbstractSeries *s, m_seriesList) {
AbstractDomain* domain = s->d_ptr->domain();
s->d_ptr->m_domain->blockRangeSignals(true);
domains<<domain;
}
foreach(AbstractDomain *domain, domains)
domain->move(dx, dy);
foreach(AbstractDomain *domain, domains)
domain->blockRangeSignals(false);
}
QPointF ChartDataSet::mapToValue(const QPointF &position, QAbstractSeries *series)
{
QPointF point;
if (series == 0 && !m_seriesList.isEmpty())
series = m_seriesList.first();
if (series && series->type() == QAbstractSeries::SeriesTypePie)
return point;
if (series && m_seriesList.contains(series))
point = series->d_ptr->m_domain->calculateDomainPoint(position - m_chart->plotArea().topLeft());
return point;
}
QPointF ChartDataSet::mapToPosition(const QPointF &value, QAbstractSeries *series)
{
QPointF point = m_chart->plotArea().topLeft();
if (series == 0 && !m_seriesList.isEmpty())
series = m_seriesList.first();
if (series && series->type() == QAbstractSeries::SeriesTypePie)
return QPoint(0, 0);
bool ok;
if (series && m_seriesList.contains(series))
point += series->d_ptr->m_domain->calculateGeometryPoint(value, ok);
return point;
}
QList<QAbstractAxis *> ChartDataSet::axes() const
{
return m_axisList;
}
QList<QAbstractSeries *> ChartDataSet::series() const
{
return m_seriesList;
}
AbstractDomain::DomainType ChartDataSet::selectDomain(QList<QAbstractAxis *> axes)
{
enum Type {
Undefined = 0,
LogType = 0x1,
ValueType = 0x2
};
int horizontal(Undefined);
int vertical(Undefined);
// Assume cartesian chart type, unless chart is set
QChart::ChartType chartType(QChart::ChartTypeCartesian);
if (m_chart)
chartType = m_chart->chartType();
foreach (QAbstractAxis *axis, axes)
{
switch (axis->type()) {
case QAbstractAxis::AxisTypeLogValue:
if (axis->orientation() == Qt::Horizontal)
horizontal |= LogType;
if (axis->orientation() == Qt::Vertical)
vertical |= LogType;
break;
case QAbstractAxis::AxisTypeValue:
case QAbstractAxis::AxisTypeBarCategory:
case QAbstractAxis::AxisTypeCategory:
case QAbstractAxis::AxisTypeDateTime:
if (axis->orientation() == Qt::Horizontal)
horizontal |= ValueType;
if (axis->orientation() == Qt::Vertical)
vertical |= ValueType;
break;
default:
qWarning() << "Undefined type";
break;
}
}
if (vertical == Undefined)
vertical = ValueType;
if (horizontal == Undefined)
horizontal = ValueType;
if (vertical == ValueType && horizontal == ValueType) {
if (chartType == QChart::ChartTypeCartesian)
return AbstractDomain::XYDomain;
else if (chartType == QChart::ChartTypePolar)
return AbstractDomain::XYPolarDomain;
}
if (vertical == LogType && horizontal == ValueType) {
if (chartType == QChart::ChartTypeCartesian)
return AbstractDomain::XLogYDomain;
if (chartType == QChart::ChartTypePolar)
return AbstractDomain::XLogYPolarDomain;
}
if (vertical == ValueType && horizontal == LogType) {
if (chartType == QChart::ChartTypeCartesian)
return AbstractDomain::LogXYDomain;
else if (chartType == QChart::ChartTypePolar)
return AbstractDomain::LogXYPolarDomain;
}
if (vertical == LogType && horizontal == LogType) {
if (chartType == QChart::ChartTypeCartesian)
return AbstractDomain::LogXLogYDomain;
else if (chartType == QChart::ChartTypePolar)
return AbstractDomain::LogXLogYPolarDomain;
}
return AbstractDomain::UndefinedDomain;
}
//refactor create factory
AbstractDomain* ChartDataSet::createDomain(AbstractDomain::DomainType type)
{
switch (type)
{
case AbstractDomain::LogXLogYDomain:
return new LogXLogYDomain();
case AbstractDomain::XYDomain:
return new XYDomain();
case AbstractDomain::XLogYDomain:
return new XLogYDomain();
case AbstractDomain::LogXYDomain:
return new LogXYDomain();
case AbstractDomain::XYPolarDomain:
return new XYPolarDomain();
case AbstractDomain::XLogYPolarDomain:
return new XLogYPolarDomain();
case AbstractDomain::LogXYPolarDomain:
return new LogXYPolarDomain();
case AbstractDomain::LogXLogYPolarDomain:
return new LogXLogYPolarDomain();
default:
return 0;
}
}
#include "moc_chartdataset_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE