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/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "piechartitem_p.h"
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#include "piesliceitem_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 "chartdataset_p.h"
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#include "chartanimator_p.h"
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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(QPieSeries *series, ChartPresenter* presenter)
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:ChartItem(presenter),
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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())); // TODO: get rid of this
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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->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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presenter()->chartTheme()->decorate(m_series, presenter()->dataSet()->seriesIndex(m_series));
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foreach (QPieSlice *s, slices) {
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PieSliceItem* item = new PieSliceItem(this);
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m_slices.insert(s, item);
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connect(s, SIGNAL(changed()), this, SLOT(handleSliceChanged()));
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connect(item, SIGNAL(clicked(Qt::MouseButtons)), s, SIGNAL(clicked(Qt::MouseButtons)));
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connect(item, SIGNAL(hoverEnter()), s, SIGNAL(hoverEnter()));
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connect(item, SIGNAL(hoverLeave()), s, SIGNAL(hoverLeave()));
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PieSliceData data = sliceData(s);
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if (animator())
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animator()->addAnimation(this, s, data, isEmpty);
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else
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setLayout(s, data);
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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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presenter()->chartTheme()->decorate(m_series, presenter()->dataSet()->seriesIndex(m_series));
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foreach (QPieSlice *s, slices) {
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if (animator())
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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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PieSliceData data = sliceData(slice);
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updateLayout(slice, data);
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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->horizontalPosition()));
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m_pieCenter.setY(m_rect.top() + (m_rect.height() * m_series->verticalPosition()));
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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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PieSliceData PieChartItem::sliceData(QPieSlice *slice)
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{
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// TODO: This function is kid of useless now. Refactor.
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PieSliceData sliceData = PieSliceData::data(slice);
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sliceData.m_center = PieSliceItem::sliceCenter(m_pieCenter, m_pieRadius, slice);
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sliceData.m_radius = m_pieRadius;
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return sliceData;
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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, sliceData(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 (animator())
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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 PieSliceData &sliceData)
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{
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if (animator())
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animator()->updateLayout(this, slice, sliceData);
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else
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setLayout(slice, sliceData);
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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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PieSliceItem *item = m_slices.value(slice);
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Q_ASSERT(item);
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item->setSliceData(layout.value(slice));
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item->updateGeometry();
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item->update();
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}
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}
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void PieChartItem::setLayout(QPieSlice *slice, const PieSliceData &sliceData)
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{
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// find slice
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PieSliceItem *item = m_slices.value(slice);
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Q_ASSERT(item);
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item->setSliceData(sliceData);
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item->updateGeometry();
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item->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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