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#include "qchartglobal.h"
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#include "qlegend.h"
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#include "qseries.h"
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#include "legendmarker_p.h"
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#include "qxyseries.h"
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#include "qlineseries.h"
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#include "qareaseries.h"
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#include "qscatterseries.h"
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#include "qsplineseries.h"
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#include "qbarseries.h"
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#include "qstackedbarseries.h"
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#include "qpercentbarseries.h"
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#include "qbarset.h"
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#include "qpieseries.h"
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#include "qpieslice.h"
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#include "chartpresenter_p.h"
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#include <QPainter>
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#include <QPen>
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#include <QGraphicsSceneEvent>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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QLegend::QLegend(QGraphicsItem *parent)
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: QGraphicsObject(parent)
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,mPos(0,0)
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,mSize(0,0)
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,mMinimumSize(50,20) // TODO: magic numbers
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,mMaximumSize(150,100)
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,mBackgroundBrush(Qt::darkGray) // TODO: from theme?
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,mPreferredLayout(QLegend::PreferredLayoutVertical)
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{
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// setVisible(false);
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setZValue(ChartPresenter::LegendZValue);
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}
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void QLegend::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(option)
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Q_UNUSED(widget)
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painter->setOpacity(0.5);
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painter->setBrush(mBackgroundBrush);
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painter->drawRect(boundingRect());
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}
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QRectF QLegend::boundingRect() const
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{
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return QRectF(mPos,mSize);
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}
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void QLegend::setBackgroundBrush(const QBrush& brush)
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{
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mBackgroundBrush = brush;
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}
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QBrush QLegend::backgroundBrush() const
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{
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return mBackgroundBrush;
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}
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void QLegend::setPreferredLayout(QLegend::PreferredLayout preferred)
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{
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mPreferredLayout = preferred;
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layoutChanged();
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}
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QSizeF QLegend::maximumSize() const
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{
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return mMaximumSize;
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}
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void QLegend::setMaximumSize(const QSizeF size)
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{
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mMaximumSize = size;
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}
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void QLegend::setSize(const QSizeF size)
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{
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mSize = size;
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if (mSize.width() > mMaximumSize.width()) {
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mSize.setWidth(mMaximumSize.width());
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}
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if (mSize.height() > mMaximumSize.height()) {
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mSize.setHeight(mMaximumSize.height());
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}
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}
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void QLegend::setPos(const QPointF &pos)
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{
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mPos = pos;
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}
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void QLegend::handleSeriesAdded(QSeries* series, Domain* domain)
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{
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Q_UNUSED(domain)
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mSeriesList.append(series);
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createMarkers(series);
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layoutChanged();
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}
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void QLegend::handleSeriesRemoved(QSeries* series)
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{
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if (series->type() == QSeries::SeriesTypeArea)
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{
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// This is special case. Area series has upper and lower series, which each have markers
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QAreaSeries* s = static_cast<QAreaSeries*> (series);
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deleteMarkers(s->upperSeries());
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deleteMarkers(s->lowerSeries());
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} else {
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deleteMarkers(series);
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}
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mSeriesList.removeOne(series);
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layoutChanged();
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}
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void QLegend::createMarkers(QSeries *series)
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{
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switch (series->type())
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{
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case QSeries::SeriesTypeLine: {
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QLineSeries* lineSeries = static_cast<QLineSeries*>(series);
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appendMarkers(lineSeries);
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break;
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}
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case QSeries::SeriesTypeArea: {
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QAreaSeries* areaSeries = static_cast<QAreaSeries*>(series);
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appendMarkers(areaSeries->upperSeries());
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if(areaSeries->lowerSeries())
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appendMarkers(areaSeries->lowerSeries());
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break;
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}
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case QSeries::SeriesTypeBar: {
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QBarSeries* barSeries = static_cast<QBarSeries*>(series);
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appendMarkers(barSeries);
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break;
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}
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case QSeries::SeriesTypeStackedBar: {
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QStackedBarSeries* stackedBarSeries = static_cast<QStackedBarSeries*>(series);
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appendMarkers(stackedBarSeries);
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break;
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}
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case QSeries::SeriesTypePercentBar: {
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QPercentBarSeries* percentBarSeries = static_cast<QPercentBarSeries*>(series);
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appendMarkers(percentBarSeries);
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break;
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}
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case QSeries::SeriesTypeScatter: {
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QScatterSeries *scatterSeries = static_cast<QScatterSeries *>(series);
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appendMarkers(scatterSeries);
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break;
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}
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case QSeries::SeriesTypePie: {
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QPieSeries *pieSeries = static_cast<QPieSeries *>(series);
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appendMarkers(pieSeries);
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break;
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}
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case QSeries::SeriesTypeSpline: {
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QSplineSeries* splineSeries = static_cast<QSplineSeries*>(series);
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appendMarkers(splineSeries);
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break;
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}
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default: {
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qDebug()<< "QLegend::createMarkers" << series->type() << "not implemented.";
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break;
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}
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}
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}
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void QLegend::appendMarkers(QXYSeries* series)
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{
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LegendMarker* marker = new LegendMarker(series,this);
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marker->setName(series->name());
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marker->setBrush(series->brush());
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connect(marker,SIGNAL(clicked(QSeries*,Qt::MouseButton)),this,SIGNAL(clicked(QSeries*,Qt::MouseButton)));
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mMarkers.append(marker);
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childItems().append(marker);
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}
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void QLegend::appendMarkers(QBarSeries *series)
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{
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foreach(QBarSet* s, series->barSets()) {
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LegendMarker* marker = new LegendMarker(series,s,this);
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marker->setName(s->name());
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marker->setBrush(s->brush());
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connect(marker,SIGNAL(clicked(QBarSet*,Qt::MouseButton)),this,SIGNAL(clicked(QBarSet*,Qt::MouseButton)));
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connect(s,SIGNAL(changed()),marker,SLOT(changed()));
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mMarkers.append(marker);
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childItems().append(marker);
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}
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}
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void QLegend::appendMarkers(QPieSeries *series)
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{
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foreach(QPieSlice* s, series->slices()) {
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LegendMarker* marker = new LegendMarker(series,s,this);
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marker->setName(s->label());
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marker->setBrush(s->sliceBrush());
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connect(marker,SIGNAL(clicked(QPieSlice*,Qt::MouseButton)),this,SIGNAL(clicked(QPieSlice*,Qt::MouseButton)));
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connect(s,SIGNAL(changed()),marker,SLOT(changed()));
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mMarkers.append(marker);
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childItems().append(marker);
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}
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}
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void QLegend::deleteMarkers(QSeries *series)
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{
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// Search all markers that belong to given series and delete them.
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foreach (LegendMarker *m, mMarkers) {
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if (m->series() == series) {
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mMarkers.removeOne(m);
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delete m;
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}
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}
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}
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void QLegend::layoutChanged()
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{
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// Calculate layout for markers and text
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if (mMarkers.count() <= 0) {
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// Nothing to do
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return;
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}
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// Find out widest item.
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qreal itemMaxWidth = 0;
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qreal itemMaxHeight = 0;
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foreach (LegendMarker* m, mMarkers) {
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if (m->boundingRect().width() > itemMaxWidth) {
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itemMaxWidth = m->boundingRect().width();
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}
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if (m->boundingRect().height() > itemMaxHeight) {
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itemMaxHeight = m->boundingRect().height();
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}
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}
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int maxHorizontalItems = boundingRect().width() / itemMaxWidth;
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int maxVerticalItems = boundingRect().height() / itemMaxHeight;
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if (mMarkers.count() > maxHorizontalItems * maxVerticalItems) {
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// TODO: overlapping layout
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qDebug() << "Warning. Not enough space to layout all legend items properly.";
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}
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qreal margin = 5;
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qreal totalWidth = 0;
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qreal totalHeight = 0;
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switch (mPreferredLayout)
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{
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case QLegend::PreferredLayoutHorizontal: {
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/*
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qreal xStep = mMaximumSize.width() / (mMarkers.count()+1);
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if (xStep > itemMaxWidth) {
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xStep = itemMaxWidth;
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}
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qreal yStep = mMaximumSize.height() / (mMarkers.count()+1);
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if (yStep > itemMaxHeight) {
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yStep = itemMaxHeight;
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}*/
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qreal xStep = itemMaxWidth;
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qreal yStep = itemMaxHeight;
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qreal x = mPos.x() + margin;
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qreal y = mPos.y() + margin;
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int row = 1;
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int column = 0;
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int maxRows = 1;
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int maxColumns = 1;
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foreach (LegendMarker* m, mMarkers) {
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maxRows = row;
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m->setPos(x,y);
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x += xStep;
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column++;
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if (column > maxColumns) {
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maxColumns = column;
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}
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if ((x + itemMaxWidth + margin*2) > (mPos.x() + mMaximumSize.width())) {
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x = mPos.x() + margin;
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y += yStep;
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row++;
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column = 0;
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}
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}
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totalWidth = maxColumns * itemMaxWidth + margin * 2;
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totalHeight = maxRows * itemMaxHeight + margin * 2;
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break;
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}
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case QLegend::PreferredLayoutVertical: {
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/*
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qreal xStep = mMaximumSize.width() / (mMarkers.count()+1);
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if (xStep > itemMaxWidth) {
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xStep = itemMaxWidth;
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}
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qreal yStep = mMaximumSize.height() / (mMarkers.count()+1);
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if (yStep > itemMaxHeight) {
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yStep = itemMaxHeight;
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}*/
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qreal xStep = itemMaxWidth;
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qreal yStep = itemMaxHeight;
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qreal x = mPos.x() + margin;
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qreal y = mPos.y() + margin;
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int row = 0;
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int column = 1;
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int maxRows = 1;
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int maxColumns = 1;
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foreach (LegendMarker* m, mMarkers) {
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maxColumns = column;
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m->setPos(x,y);
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y += yStep;
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row++;
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if (row > maxRows) {
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maxRows = row;
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}
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if ((y + itemMaxHeight + margin*2) > (mPos.y() + mMaximumSize.height())) {
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y = mPos.y() + margin;
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x += xStep;
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column++;
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row = 0;
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}
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}
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totalWidth = maxColumns * itemMaxWidth + margin * 2;
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totalHeight = maxRows * itemMaxHeight + margin * 2;
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break;
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}
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default: {
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break;
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}
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}
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mSize.setWidth(totalWidth);
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mSize.setHeight(totalHeight);
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}
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#include "moc_qlegend.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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