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#include "qchart.h"
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#include "qchartseries.h"
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#include "qscatterseries.h"
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#include "qscatterseries_p.h"
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#include "qpieseries.h"
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#include "qxychartseries.h"
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#include "barchartseries.h"
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#include "bargroup.h"
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#include "xylinechartitem_p.h"
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#include "plotdomain_p.h"
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#include "axisitem_p.h"
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#include <QGraphicsScene>
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#include <QDebug>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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QChart::QChart(QGraphicsObject* parent) : QGraphicsObject(parent),
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m_background(new QGraphicsRectItem(this)),
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m_title(new QGraphicsTextItem(this)),
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m_axisX(new AxisItem(AxisItem::X_AXIS,this)),
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m_axisY(new AxisItem(AxisItem::Y_AXIS,this)),
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m_plotDataIndex(0),
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m_marginSize(0)
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{
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// TODO: the default theme?
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setTheme(QChart::ChartThemeVanilla);
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// setFlags(QGraphicsItem::ItemClipsChildrenToShape);
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PlotDomain domain;
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m_plotDomainList<<domain;
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m_chartItems<<m_axisX;
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m_chartItems<<m_axisY;
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}
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QChart::~QChart(){}
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QRectF QChart::boundingRect() const
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{
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return m_rect;
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}
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void QChart::addSeries(QChartSeries* series)
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{
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// TODO: we should check the series not already added
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m_series<<series;
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switch(series->type())
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{
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case QChartSeries::SeriesTypeLine: {
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QXYChartSeries* xyseries = static_cast<QXYChartSeries*>(series);
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// Use color defined by theme in case the series does not define a custom color
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if (!xyseries->color().isValid() && m_themeColors.count())
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xyseries->setColor(m_themeColors.takeFirst());
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m_plotDataIndex = 0 ;
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m_plotDomainList.resize(1);
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PlotDomain& domain = m_plotDomainList[m_plotDataIndex];
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for (int i = 0 ; i < xyseries->count() ; i++)
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{
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qreal x = xyseries->x(i);
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qreal y = xyseries->y(i);
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domain.m_minX = qMin(domain.m_minX,x);
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domain.m_minY = qMin(domain.m_minY,y);
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domain.m_maxX = qMax(domain.m_maxX,x);
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domain.m_maxY = qMax(domain.m_maxY,y);
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}
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XYLineChartItem* item = new XYLineChartItem(xyseries,this);
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m_chartItems<<item;
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foreach(ChartItem* i ,m_chartItems)
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i->setPlotDomain(m_plotDomainList.at(m_plotDataIndex));
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break;
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}
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case QChartSeries::SeriesTypeBar: {
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qDebug() << "barSeries added";
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BarChartSeries* barSeries = static_cast<BarChartSeries*>(series);
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BarGroup* barGroup = new BarGroup(*barSeries,this);
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m_chartItems<<barGroup;
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childItems().append(barGroup);
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break;
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}
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case QChartSeries::SeriesTypeScatter: {
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QScatterSeries *scatterSeries = qobject_cast<QScatterSeries *>(series);
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connect(this, SIGNAL(sizeChanged(QRectF)),
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scatterSeries, SLOT(chartSizeChanged(QRectF)));
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scatterSeries->d->setParentItem(this);
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QColor nextColor = m_themeColors.takeFirst();
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nextColor.setAlpha(150); // TODO: default opacity?
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scatterSeries->setMarkerColor(nextColor);
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}
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case QChartSeries::SeriesTypePie: {
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// TODO: we now have also a list of y values as a parameter, it is ignored
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// we should use a generic data class instead of list of x and y values
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QPieSeries *pieSeries = qobject_cast<QPieSeries *>(series);
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connect(this, SIGNAL(sizeChanged(QRectF)),
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pieSeries, SLOT(chartSizeChanged(QRectF)));
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// TODO: how to define the color for all the slices of a pie?
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}
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}
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}
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QChartSeries* QChart::createSeries(QChartSeries::QChartSeriesType type)
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{
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// TODO: support also other types; not only scatter and pie
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QChartSeries *series(0);
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switch (type) {
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case QChartSeries::SeriesTypeLine: {
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series = QXYChartSeries::create();
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break;
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}
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case QChartSeries::SeriesTypeBar: {
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series = new BarChartSeries(this);
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break;
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}
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case QChartSeries::SeriesTypeScatter: {
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series = new QScatterSeries(this);
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break;
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}
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case QChartSeries::SeriesTypePie: {
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series = new QPieSeries(this);
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break;
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}
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default:
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Q_ASSERT(false);
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break;
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}
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addSeries(series);
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return series;
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}
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void QChart::setSize(const QSize& size)
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{
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m_rect = QRect(QPoint(0,0),size);
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QRect rect = m_rect.adjusted(margin(),margin(), -margin(), -margin());
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//recalculate background gradient
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m_background->setRect(rect);
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m_backgroundGradient.setFinalStop(0,m_background->rect().height());
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m_background->setBrush(m_backgroundGradient);
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//resize elements
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foreach (ChartItem* item ,m_chartItems) {
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item->setPos(rect.topLeft());
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item->setSize(rect.size());
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}
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// TODO: TTD for setting scale
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//emit scaleChanged(100, 100);
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// TODO: calculate the origo
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// TODO: not sure if emitting a signal here is the best from performance point of view
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emit sizeChanged(QRectF(0, 0, size.width(), size.height()));
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update();
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}
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void QChart::setBackgroundColor(const QColor& color)
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{
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m_backgroundGradient.setColorAt( 0.0, Qt::white);
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m_backgroundGradient.setColorAt( 1.0, color);
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m_background->setBrush(m_backgroundGradient);
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m_background->setPen(Qt::NoPen);
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m_background->update();
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}
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void QChart::setTitle(const QString& title)
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{
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m_title->setPlainText(title);
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}
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int QChart::margin() const
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{
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return m_marginSize;
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}
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void QChart::setMargin(int margin)
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{
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m_marginSize = margin;
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}
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void QChart::setTheme(QChart::ChartTheme theme)
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{
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// TODO: define color themes
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switch (theme) {
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case ChartThemeVanilla:
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m_themeColors.append(QColor(255, 238, 174));
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m_themeColors.append(QColor(228, 228, 160));
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m_themeColors.append(QColor(228, 179, 160));
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m_themeColors.append(QColor(180, 151, 18));
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m_themeColors.append(QColor(252, 252, 37));
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break;
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case ChartThemeIcy:
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m_themeColors.append(QColor(255, 238, 174));
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m_themeColors.append(QColor(228, 228, 160));
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m_themeColors.append(QColor(228, 179, 160));
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m_themeColors.append(QColor(180, 151, 18));
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m_themeColors.append(QColor(252, 252, 37));
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break;
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case ChartThemeGrayscale:
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m_themeColors.append(QColor(255, 238, 174));
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m_themeColors.append(QColor(228, 228, 160));
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m_themeColors.append(QColor(228, 179, 160));
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m_themeColors.append(QColor(180, 151, 18));
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m_themeColors.append(QColor(252, 252, 37));
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break;
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default:
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Q_ASSERT(false);
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break;
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}
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// TODO: update coloring of different elements to match the selected theme
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}
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void QChart::zoomInToRect(const QRect& rectangle)
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{
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if(!rectangle.isValid()) return;
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qreal margin = this->margin();
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QRect rect = rectangle.normalized();
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rect.translate(-margin, -margin);
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PlotDomain& oldDomain = m_plotDomainList[m_plotDataIndex];
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PlotDomain newDomain;
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qreal dx = oldDomain.spanX() / (m_rect.width() - 2 * margin);
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qreal dy = oldDomain.spanY() / (m_rect.height() - 2 * margin);
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newDomain.m_minX = oldDomain.m_minX + dx * rect.left();
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newDomain.m_maxX = oldDomain.m_minX + dx * rect.right();
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newDomain.m_minY = oldDomain.m_maxY - dy * rect.bottom();
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newDomain.m_maxY = oldDomain.m_maxY - dy * rect.top();
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m_plotDomainList.resize(m_plotDataIndex + 1);
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m_plotDomainList<<newDomain;
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m_plotDataIndex++;
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foreach (ChartItem* item ,m_chartItems)
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item->setPlotDomain(m_plotDomainList[m_plotDataIndex]);
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update();
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}
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void QChart::zoomIn()
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{
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if (m_plotDataIndex < m_plotDomainList.count() - 1) {
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m_plotDataIndex++;
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foreach (ChartItem* item ,m_chartItems)
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item->setPlotDomain(m_plotDomainList[m_plotDataIndex]);
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update();
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}else{
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QRect rect = m_rect.adjusted(margin(),margin(), -margin(), -margin());
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rect.setWidth(rect.width()/2);
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rect.setHeight(rect.height()/2);
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rect.moveCenter(m_rect.center());
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zoomInToRect(rect);
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}
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}
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void QChart::zoomOut()
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{
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if (m_plotDataIndex > 0) {
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m_plotDataIndex--;
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foreach (ChartItem* item ,m_chartItems)
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item->setPlotDomain(m_plotDomainList[m_plotDataIndex]);
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update();
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}
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}
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#include "moc_qchart.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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