piepresentation.cpp
122 lines
| 3.4 KiB
| text/x-c
|
CppLexer
Jani Honkonen
|
r142 | |||
| #include "piepresentation.h" | ||||
| #include "pieslice.h" | ||||
| #include <QDebug> | ||||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
| PiePresentation::PiePresentation(QGraphicsItem *parent, QPieSeries *series) : | ||||
| ChartItem(parent), | ||||
| m_pieSeries(series) | ||||
| { | ||||
| Q_ASSERT(parent); | ||||
| Q_ASSERT(series); | ||||
| m_rect = parentItem()->boundingRect(); | ||||
| setAcceptHoverEvents(true); | ||||
| } | ||||
| PiePresentation::~PiePresentation() | ||||
| { | ||||
| while (m_slices.count()) | ||||
| delete m_slices.takeLast(); | ||||
| } | ||||
| void PiePresentation::seriesChanged() | ||||
| { | ||||
| const qreal fullPie = 360; | ||||
| qreal total = 0; | ||||
| // calculate total | ||||
| foreach (QPieSlice sliceData, m_pieSeries->slices()) | ||||
| total += sliceData.m_value; | ||||
| // TODO: no need to create new slices in case size changed; we should re-use the existing ones | ||||
| while (m_slices.count()) | ||||
| delete m_slices.takeLast(); | ||||
| // create slices | ||||
| qreal angle = 0; | ||||
| for (int i=0; i<m_pieSeries->count(); i++) { | ||||
| QPieSlice sliceData = m_pieSeries->slice(i); | ||||
| qreal span = sliceData.m_value / total * fullPie; | ||||
| PieSlice *slice = new PieSlice(this, i, angle, span); | ||||
| m_slices.append(slice); | ||||
| angle += span; | ||||
| } | ||||
| resize(); | ||||
| } | ||||
| void PiePresentation::setSize(const QSizeF &size) | ||||
| { | ||||
| // TODO: allow user setting the size? | ||||
| // TODO: allow user defining the margins? | ||||
| m_rect.setSize(size); | ||||
| resize(); | ||||
| } | ||||
| void PiePresentation::setPlotDomain(const PlotDomain& plotDomain) | ||||
| { | ||||
| // TODO | ||||
| } | ||||
| void PiePresentation::resize() | ||||
| { | ||||
| m_pieRect = m_rect; | ||||
| if (m_pieRect.width() < m_pieRect.height()) { | ||||
| m_pieRect.setWidth(m_pieRect.width() * m_pieSeries->m_sizeFactor); | ||||
| m_pieRect.setHeight(m_pieRect.width()); | ||||
| m_pieRect.moveCenter(m_rect.center()); | ||||
| } else { | ||||
| m_pieRect.setHeight(m_pieRect.height() * m_pieSeries->m_sizeFactor); | ||||
| m_pieRect.setWidth(m_pieRect.height()); | ||||
| m_pieRect.moveCenter(m_rect.center()); | ||||
| } | ||||
| switch (m_pieSeries->m_position) { | ||||
| case QPieSeries::PiePositionTopLeft: { | ||||
| m_pieRect.setHeight(m_pieRect.height() / 2); | ||||
| m_pieRect.setWidth(m_pieRect.height()); | ||||
| m_pieRect.moveCenter(QPointF(m_rect.center().x() / 2, m_rect.center().y() / 2)); | ||||
| break; | ||||
| } | ||||
| case QPieSeries::PiePositionTopRight: { | ||||
| m_pieRect.setHeight(m_pieRect.height() / 2); | ||||
| m_pieRect.setWidth(m_pieRect.height()); | ||||
| m_pieRect.moveCenter(QPointF((m_rect.center().x() / 2) * 3, m_rect.center().y() / 2)); | ||||
| break; | ||||
| } | ||||
| case QPieSeries::PiePositionBottomLeft: { | ||||
| m_pieRect.setHeight(m_pieRect.height() / 2); | ||||
| m_pieRect.setWidth(m_pieRect.height()); | ||||
| m_pieRect.moveCenter(QPointF(m_rect.center().x() / 2, (m_rect.center().y() / 2) * 3)); | ||||
| break; | ||||
| } | ||||
| case QPieSeries::PiePositionBottomRight: { | ||||
| m_pieRect.setHeight(m_pieRect.height() / 2); | ||||
| m_pieRect.setWidth(m_pieRect.height()); | ||||
| m_pieRect.moveCenter(QPointF((m_rect.center().x() / 2) * 3, (m_rect.center().y() / 2) * 3)); | ||||
| break; | ||||
| } | ||||
| default: | ||||
| break; | ||||
| } | ||||
| qDebug() << "presentation rect:" << m_rect; | ||||
| qDebug() << "pie rect:" << m_pieRect; | ||||
| } | ||||
| void PiePresentation::handleDomainChanged(const Domain& domain) | ||||
| { | ||||
| // TODO | ||||
| } | ||||
| void PiePresentation::handleGeometryChanged(const QRectF& rect) | ||||
| { | ||||
| setSize(rect.size()); | ||||
| } | ||||
| #include "moc_piepresentation.cpp" | ||||
| QTCOMMERCIALCHART_END_NAMESPACE | ||||