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#include "piechartitem_p.h"
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#include "pieslice_p.h"
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#include "qpieslice.h"
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#include "qpieseries.h"
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#include "chartpresenter_p.h"
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#include "chartanimator_p.h"
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#include <QDebug>
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#include <QPainter>
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#include <QTimer>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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PieChartItem::PieChartItem(QGraphicsItem *parent, QPieSeries *series)
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:ChartItem(parent),
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m_series(series)
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{
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Q_ASSERT(series);
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connect(series, SIGNAL(added(QList<QPieSlice*>)), this, SLOT(handleSlicesAdded(QList<QPieSlice*>)));
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connect(series, SIGNAL(removed(QList<QPieSlice*>)), this, SLOT(handleSlicesRemoved(QList<QPieSlice*>)));
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connect(series, SIGNAL(piePositionChanged()), this, SLOT(handlePieLayoutChanged()));
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connect(series, SIGNAL(pieSizeChanged()), this, SLOT(handlePieLayoutChanged()));
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QTimer::singleShot(0, this, SLOT(initialize()));
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// Note: the following does not affect as long as the item does not have anything to paint
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setZValue(ChartPresenter::PieSeriesZValue);
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}
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PieChartItem::~PieChartItem()
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{
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// slices deleted automatically through QGraphicsItem
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}
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void PieChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
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{
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Q_UNUSED(painter)
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// TODO: paint shadows for all components
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// - get paths from items & merge & offset and draw with shadow color?
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//painter->setBrush(QBrush(Qt::red));
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//painter->drawRect(m_debugRect);
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}
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void PieChartItem::initialize()
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{
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handleSlicesAdded(m_series->m_slices);
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}
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void PieChartItem::handleSlicesAdded(QList<QPieSlice*> slices)
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{
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bool isEmpty = m_slices.isEmpty();
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foreach (QPieSlice *s, slices) {
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PieSlice* slice = new PieSlice(this);
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m_slices.insert(s, slice);
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connect(s, SIGNAL(changed()), this, SLOT(handleSliceChanged()));
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connect(slice, SIGNAL(clicked()), s, SIGNAL(clicked()));
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connect(slice, SIGNAL(hoverEnter()), s, SIGNAL(hoverEnter()));
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connect(slice, SIGNAL(hoverLeave()), s, SIGNAL(hoverLeave()));
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PieSliceLayout layout = calculateSliceLayout(s);
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if (m_animator)
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m_animator->addAnimation(this, s, layout, isEmpty);
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else
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setLayout(s, layout);
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}
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}
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void PieChartItem::handleSlicesRemoved(QList<QPieSlice*> slices)
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{
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foreach (QPieSlice *s, slices) {
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if (m_animator)
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m_animator->removeAnimation(this, s);
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else
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destroySlice(s);
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}
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}
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void PieChartItem::handlePieLayoutChanged()
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{
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PieLayout layout = calculateLayout();
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applyLayout(layout);
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update();
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}
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void PieChartItem::handleSliceChanged()
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{
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QPieSlice* slice = qobject_cast<QPieSlice *>(sender());
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Q_ASSERT(m_slices.contains(slice));
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PieSliceLayout layout = calculateSliceLayout(slice);
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updateLayout(slice, layout);
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update();
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}
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void PieChartItem::handleDomainChanged(qreal, qreal, qreal, qreal)
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{
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// TODO
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}
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void PieChartItem::handleGeometryChanged(const QRectF& rect)
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{
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prepareGeometryChange();
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m_rect = rect;
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handlePieLayoutChanged();
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}
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void PieChartItem::calculatePieLayout()
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{
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// find pie center coordinates
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m_pieCenter.setX(m_rect.left() + (m_rect.width() * m_series->pieHorizontalPosition()));
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m_pieCenter.setY(m_rect.top() + (m_rect.height() * m_series->pieVerticalPosition()));
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// find maximum radius for pie
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m_pieRadius = m_rect.height() / 2;
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if (m_rect.width() < m_rect.height())
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m_pieRadius = m_rect.width() / 2;
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// apply size factor
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m_pieRadius *= m_series->pieSize();
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}
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PieSliceLayout PieChartItem::calculateSliceLayout(QPieSlice *slice)
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{
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PieSliceLayout sliceLayout;
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sliceLayout.m_center = PieSlice::sliceCenter(m_pieCenter, m_pieRadius, slice);
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sliceLayout.m_radius = m_pieRadius;
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sliceLayout.m_startAngle = slice->startAngle();
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sliceLayout.m_angleSpan = slice->m_angleSpan;
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return sliceLayout;
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}
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PieLayout PieChartItem::calculateLayout()
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{
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calculatePieLayout();
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PieLayout layout;
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foreach (QPieSlice* s, m_series->slices()) {
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if (m_slices.contains(s)) // calculate layout only for those slices that are already visible
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layout.insert(s, calculateSliceLayout(s));
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}
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return layout;
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}
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void PieChartItem::applyLayout(const PieLayout &layout)
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{
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if (m_animator)
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m_animator->updateLayout(this, layout);
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else
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setLayout(layout);
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}
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void PieChartItem::updateLayout(QPieSlice *slice, const PieSliceLayout &layout)
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{
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if (m_animator)
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m_animator->updateLayout(this, slice, layout);
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else
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setLayout(slice, layout);
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}
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void PieChartItem::setLayout(const PieLayout &layout)
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{
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foreach (QPieSlice *slice, layout.keys()) {
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PieSlice *s = m_slices.value(slice);
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Q_ASSERT(s);
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s->setLayout(layout.value(slice));
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s->updateData(slice);
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s->updateGeometry();
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s->update();
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}
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}
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void PieChartItem::setLayout(QPieSlice *slice, const PieSliceLayout &layout)
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{
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// find slice
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PieSlice *s = m_slices.value(slice);
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Q_ASSERT(s);
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s->setLayout(layout);
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if (m_series->m_slices.contains(slice)) // Slice has been deleted if not found. Animations ongoing...
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s->updateData(slice);
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s->updateGeometry();
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s->update();
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}
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void PieChartItem::destroySlice(QPieSlice *slice)
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{
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delete m_slices.take(slice);
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}
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#include "moc_piechartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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