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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 <QDebug>
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#include <QPainter>
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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(changed()), this, SLOT(handleSeriesChanged()));
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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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// 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::handleSeriesChanged()
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{
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QVector<PieSliceLayout> sliceLayout = calculateLayout();
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applyLayout(sliceLayout);
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update();
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}
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void PieChartItem::handleSliceChanged()
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{
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// TODO: optimize don't need to handle all slices
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QVector<PieSliceLayout> sliceLayout = calculateLayout();
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applyLayout(sliceLayout);
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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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QVector<PieSliceLayout> sliceLayout = calculateLayout();
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applyLayout(sliceLayout);
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update();
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}
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QVector<PieSliceLayout> PieChartItem::calculateLayout()
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{
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// find pie center coordinates
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QPointF center;
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center.setX(m_rect.left() + (m_rect.width() * m_series->pieHorizontalPosition()));
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center.setY(m_rect.top() + (m_rect.height() * m_series->pieVerticalPosition()));
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// find maximum radius for pie
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qreal radius = m_rect.height() / 2;
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if (m_rect.width() < m_rect.height())
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radius = m_rect.width() / 2;
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// apply size factor
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radius *= m_series->pieSize();
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QVector<PieSliceLayout> layout;
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foreach (QPieSlice* s, m_series->slices()) {
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PieSliceLayout sliceLayout;
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sliceLayout.m_data = s;
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sliceLayout.m_center = PieSlice::sliceCenter(center, radius, s);
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sliceLayout.m_radius = radius;
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sliceLayout.m_startAngle = s->startAngle();
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sliceLayout.m_angleSpan = s->m_angleSpan;
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layout << sliceLayout;
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}
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return layout;
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}
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void PieChartItem::applyLayout(const QVector<PieSliceLayout> &layout)
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{
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//if(m_animator)
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// m_animator->applyLayout(this,points);
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//else
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setLayout(layout);
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}
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void PieChartItem::setLayout(const QVector<PieSliceLayout> &layout)
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{
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foreach (PieSliceLayout l, layout) {
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// find slice
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PieSlice *slice = m_slices.value(l.m_data);
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if (!slice) {
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// add a new slice
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slice = new PieSlice(this);
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m_slices.insert(l.m_data, slice);
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// connect signals
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connect(l.m_data, SIGNAL(changed()), this, SLOT(handleSliceChanged()));
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connect(slice, SIGNAL(clicked()), l.m_data, SIGNAL(clicked()));
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connect(slice, SIGNAL(hoverEnter()), l.m_data, SIGNAL(hoverEnter()));
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connect(slice, SIGNAL(hoverLeave()), l.m_data, SIGNAL(hoverLeave()));
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}
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// update
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slice->setLayout(l);
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slice->updateGeometry();
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slice->update();
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}
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// delete slices
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foreach (QPieSlice *s, m_slices.keys()) {
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bool found = false;
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foreach (PieSliceLayout l, layout) {
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if (l.m_data == s)
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found = true;
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}
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if (!found)
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delete m_slices.take(s);
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}
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}
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#include "moc_piechartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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