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#include "piepresenter.h"
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#include "pieslice.h"
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#include <QDebug>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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PiePresenter::PiePresenter(QGraphicsItem *parent, QPieSeries *series) :
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ChartItem(parent),
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m_pieSeries(series)
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{
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Q_ASSERT(parent);
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Q_ASSERT(series);
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m_rect = parentItem()->boundingRect();
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setAcceptHoverEvents(true);
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}
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PiePresenter::~PiePresenter()
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{
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while (m_slices.count())
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delete m_slices.takeLast();
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}
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void PiePresenter::seriesChanged()
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{
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const qreal fullPie = 360;
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qreal total = 0;
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// calculate total
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foreach (QPieSlice sliceData, m_pieSeries->slices())
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total += sliceData.m_value;
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// TODO: no need to create new slices in case size changed; we should re-use the existing ones
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while (m_slices.count())
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delete m_slices.takeLast();
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// create slices
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qreal angle = 0;
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for (int i=0; i<m_pieSeries->count(); i++) {
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QPieSlice sliceData = m_pieSeries->slice(i);
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qreal span = sliceData.m_value / total * fullPie;
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PieSlice *slice = new PieSlice(this, i, angle, span);
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m_slices.append(slice);
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angle += span;
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}
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resize();
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}
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void PiePresenter::resize()
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{
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m_pieRect = m_rect;
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if (m_pieRect.width() < m_pieRect.height()) {
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m_pieRect.setWidth(m_pieRect.width() * m_pieSeries->m_sizeFactor);
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m_pieRect.setHeight(m_pieRect.width());
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m_pieRect.moveCenter(m_rect.center());
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} else {
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m_pieRect.setHeight(m_pieRect.height() * m_pieSeries->m_sizeFactor);
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m_pieRect.setWidth(m_pieRect.height());
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m_pieRect.moveCenter(m_rect.center());
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}
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switch (m_pieSeries->m_position) {
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case QPieSeries::PiePositionTopLeft: {
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m_pieRect.setHeight(m_pieRect.height() / 2);
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m_pieRect.setWidth(m_pieRect.height());
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m_pieRect.moveCenter(QPointF(m_rect.center().x() / 2, m_rect.center().y() / 2));
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break;
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}
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case QPieSeries::PiePositionTopRight: {
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m_pieRect.setHeight(m_pieRect.height() / 2);
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m_pieRect.setWidth(m_pieRect.height());
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m_pieRect.moveCenter(QPointF((m_rect.center().x() / 2) * 3, m_rect.center().y() / 2));
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break;
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}
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case QPieSeries::PiePositionBottomLeft: {
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m_pieRect.setHeight(m_pieRect.height() / 2);
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m_pieRect.setWidth(m_pieRect.height());
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m_pieRect.moveCenter(QPointF(m_rect.center().x() / 2, (m_rect.center().y() / 2) * 3));
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break;
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}
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case QPieSeries::PiePositionBottomRight: {
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m_pieRect.setHeight(m_pieRect.height() / 2);
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m_pieRect.setWidth(m_pieRect.height());
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m_pieRect.moveCenter(QPointF((m_rect.center().x() / 2) * 3, (m_rect.center().y() / 2) * 3));
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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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qDebug() << "presentation rect:" << m_rect;
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qDebug() << "pie rect:" << m_pieRect;
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}
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void PiePresenter::handleDomainChanged(const Domain& domain)
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{
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// TODO
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}
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void PiePresenter::handleGeometryChanged(const QRectF& rect)
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{
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// TODO: allow user setting the size?
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// TODO: allow user defining the margins?
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m_rect.setSize(rect.size());
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resize();
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}
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#include "moc_piepresenter.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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