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#include "piepresenter_p.h"
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#include "pieslice_p.h"
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#include "qpieslice.h"
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#include "pieslicelabel_p.h"
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#include "qpieseries.h"
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#include <qmath.h>
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#include <QDebug>
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#include <QFontMetrics>
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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_series(series)
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{
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Q_ASSERT(series);
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connect(series, SIGNAL(changed(const QPieSeries::ChangeSet&)), this, SLOT(handleSeriesChanged(const QPieSeries::ChangeSet&)));
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connect(series, SIGNAL(sizeFactorChanged()), this, SLOT(updateGeometry()));
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connect(series, SIGNAL(positionChanged()), this, SLOT(updateGeometry()));
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if (m_series->count()) {
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QPieSeries::ChangeSet changeSet;
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changeSet.appendAdded(m_series->m_slices);
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handleSeriesChanged(changeSet);
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}
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}
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PiePresenter::~PiePresenter()
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{
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// slices deleted automatically through QGraphicsItem
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}
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void PiePresenter::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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}
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void PiePresenter::handleSeriesChanged(const QPieSeries::ChangeSet& changeSet)
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{
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//qDebug() << "PiePresenter::handleSeriesChanged()";
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//qDebug() << " added : " << changeSet.added();
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//qDebug() << " changed: " << changeSet.changed();
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//qDebug() << " removed: " << changeSet.removed();
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foreach (QPieSlice* s, changeSet.added())
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addSlice(s);
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foreach (QPieSlice* s, changeSet.changed())
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updateSlice(s);
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foreach (QPieSlice* s, changeSet.removed())
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deleteSlice(s);
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// every change possibly changes the actual pie size
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updateGeometry();
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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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m_rect = rect;
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prepareGeometryChange();
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updateGeometry();
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}
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void PiePresenter::updateGeometry()
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{
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if (!m_rect.isValid() || m_rect.isEmpty())
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return;
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// calculate maximum rectangle for pie
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QRectF pieRect = m_rect;
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if (pieRect.width() < pieRect.height()) {
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pieRect.setWidth(pieRect.width() * m_series->sizeFactor());
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pieRect.setHeight(pieRect.width());
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pieRect.moveCenter(m_rect.center());
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} else {
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pieRect.setHeight(pieRect.height() * m_series->sizeFactor());
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pieRect.setWidth(pieRect.height());
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pieRect.moveCenter(m_rect.center());
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}
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// position the pie rectangle
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switch (m_series->position()) {
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case QPieSeries::PiePositionTopLeft: {
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pieRect.setHeight(pieRect.height() / 2);
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pieRect.setWidth(pieRect.height());
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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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pieRect.setHeight(pieRect.height() / 2);
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pieRect.setWidth(pieRect.height());
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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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pieRect.setHeight(pieRect.height() / 2);
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pieRect.setWidth(pieRect.height());
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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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pieRect.setHeight(pieRect.height() / 2);
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pieRect.setWidth(pieRect.height());
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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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// calculate how much space we need around the pie rectangle (labels & exploding)
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qreal delta = 0;
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qreal pieRadius = pieRect.height() / 2;
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foreach (QPieSlice* s, m_series->m_slices) {
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// calculate the farthest point in the slice from the pie center
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// the arm
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qreal centerAngle = s->m_startAngle + (s->m_angleSpan / 2);
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qreal len = pieRadius + PIESLICE_LABEL_GAP + s->labelArmLength() + s->explodeDistance();
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QPointF dp(qSin(centerAngle*(PI/180)) * len, -qCos(centerAngle*(PI/180)) * len);
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QPointF p = pieRect.center() + dp;
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// the label text
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QFontMetricsF fm(s->labelFont());
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QRectF labelRect = fm.boundingRect(s->label());
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if (centerAngle < 90 || centerAngle > 270)
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p += QPointF(0, -labelRect.height());
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if (centerAngle < 180)
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p += QPointF(labelRect.width(), 0);
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else
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p += QPointF(-labelRect.width(), 0);
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// calculate how much the radius must get smaller to fit that point in the base rectangle
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qreal dt = m_rect.top() - p.y();
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if (dt > delta) delta = dt;
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qreal dl = m_rect.left() - p.x();
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if (dl > delta) delta = dl;
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qreal dr = p.x() - m_rect.right();
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if (dr > delta) delta = dr;
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qreal db = p.y() - m_rect.bottom();
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if (db > delta) delta = db;
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//if (!m_rect.contains(p)) qDebug() << s->label() << dt << dl << dr << db << "delta" << delta;
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}
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// shrink the pie rectangle so that everything outside it fits the base rectangle
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pieRect.adjust(delta, delta, -delta, -delta);
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// update slices
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if (m_pieRect != pieRect) {
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m_pieRect = pieRect;
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//qDebug() << "PiePresenter::updateGeometry()" << m_rect << m_pieRect;
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foreach (PieSlice* s, m_slices.values()) {
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s->setPieRect(m_pieRect);
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s->updateGeometry();
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s->update();
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}
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}
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}
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void PiePresenter::addSlice(QPieSlice* sliceData)
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{
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//qDebug() << "PiePresenter::addSlice()" << sliceData;
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if (m_slices.keys().contains(sliceData)) {
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Q_ASSERT(0); // TODO: how to handle this nicely?
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return;
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}
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// create slice
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PieSlice *slice = new PieSlice(this);
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slice->setPieRect(m_pieRect);
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slice->updateData(sliceData);
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slice->updateGeometry();
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slice->update();
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m_slices.insert(sliceData, slice);
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// connect signals
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connect(slice, SIGNAL(clicked()), sliceData, SIGNAL(clicked()));
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connect(slice, SIGNAL(hoverEnter()), sliceData, SIGNAL(hoverEnter()));
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connect(slice, SIGNAL(hoverLeave()), sliceData, SIGNAL(hoverLeave()));
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}
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void PiePresenter::updateSlice(QPieSlice* sliceData)
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{
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//qDebug() << "PiePresenter::updateSlice()" << sliceData;
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if (!m_slices.contains(sliceData)) {
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Q_ASSERT(0); // TODO: how to handle this nicely?
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return;
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}
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m_slices[sliceData]->updateData(sliceData);
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}
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void PiePresenter::deleteSlice(QPieSlice* sliceData)
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{
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//qDebug() << "PiePresenter::deleteSlice()" << sliceData;
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if (!m_slices.contains(sliceData)) {
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Q_ASSERT(0); // TODO: how to handle this nicely?
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return;
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}
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delete m_slices.take(sliceData);
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}
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#include "moc_piepresenter_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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