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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 "qpieseries_p.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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QPieSeriesPrivate *d = QPieSeriesPrivate::seriesData(*series);
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connect(d, SIGNAL(piePositionChanged()), this, SLOT(updateLayout()));
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connect(d, SIGNAL(pieSizeChanged()), this, SLOT(updateLayout()));
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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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// Note: will not create slice items until we have a proper rectangle to draw on.
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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::handleGeometryChanged(const QRectF& rect)
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{
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prepareGeometryChange();
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m_rect = rect;
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updateLayout();
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// This is for delayed initialization of the slice items during startup.
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// It ensures that startup animation originates from the correct position.
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if (m_sliceItems.isEmpty())
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handleSlicesAdded(m_series->slices());
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}
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void PieChartItem::handleDomainChanged(qreal minX, qreal maxX, qreal minY, qreal maxY)
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{
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Q_UNUSED(minX);
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Q_UNUSED(maxX);
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Q_UNUSED(minY);
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Q_UNUSED(maxY);
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// does not apply to pie
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}
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void PieChartItem::rangeXChanged(qreal min, qreal max, int tickXCount)
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{
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Q_UNUSED(min);
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Q_UNUSED(max);
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Q_UNUSED(tickXCount);
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// does not apply to pie
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}
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void PieChartItem::rangeYChanged(qreal min, qreal max, int tickYCount)
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{
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Q_UNUSED(min);
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Q_UNUSED(max);
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Q_UNUSED(tickYCount);
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// does not apply to pie
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}
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void PieChartItem::updateLayout()
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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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// set layouts for existing slice items
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foreach (QPieSlice* slice, m_series->slices()) {
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PieSliceItem *sliceItem = m_sliceItems.value(slice);
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if (sliceItem) {
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PieSliceData sliceData = updateSliceGeometry(slice);
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if (animator())
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animator()->updateAnimation(this, sliceItem, sliceData);
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else
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sliceItem->setLayout(sliceData);
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}
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}
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update();
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}
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void PieChartItem::handleSlicesAdded(QList<QPieSlice*> slices)
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{
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// delay creating slice items until there is a proper rectangle
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if (!m_rect.isValid() && m_sliceItems.isEmpty())
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return;
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presenter()->chartTheme()->decorate(m_series, presenter()->dataSet()->seriesIndex(m_series));
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bool startupAnimation = m_sliceItems.isEmpty();
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foreach (QPieSlice *slice, slices) {
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PieSliceItem* sliceItem = new PieSliceItem(this);
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m_sliceItems.insert(slice, sliceItem);
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// note: do need to connect to slice valueChanged(). calculatedDataChanged() is enough.
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// to update the slice.
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connect(slice, SIGNAL(calculatedDataChanged()), this, SLOT(handleSliceChanged()));
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connect(slice, SIGNAL(labelChanged()), this, SLOT(handleSliceChanged()));
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connect(slice, SIGNAL(appearanceChanged()), this, SLOT(handleSliceChanged()));
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connect(sliceItem, SIGNAL(clicked(Qt::MouseButtons)), slice, SIGNAL(clicked()));
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connect(sliceItem, SIGNAL(hovered(bool)), slice, SIGNAL(hovered(bool)));
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PieSliceData sliceData = updateSliceGeometry(slice);
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if (animator())
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animator()->addAnimation(this, sliceItem, sliceData, startupAnimation);
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else
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sliceItem->setLayout(sliceData);
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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 *slice, slices) {
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PieSliceItem *sliceItem = m_sliceItems.value(slice);
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Q_ASSERT(sliceItem);
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m_sliceItems.remove(slice);
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if (animator())
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animator()->removeAnimation(this, sliceItem); // animator deletes the PieSliceItem
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else
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delete sliceItem;
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}
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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_sliceItems.contains(slice));
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PieSliceItem *sliceItem = m_sliceItems.value(slice);
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PieSliceData sliceData = updateSliceGeometry(slice);
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if (animator())
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animator()->updateAnimation(this, sliceItem, sliceData);
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else
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sliceItem->setLayout(sliceData);
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update();
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}
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PieSliceData PieChartItem::updateSliceGeometry(QPieSlice *slice)
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{
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PieSliceData &sliceData = PieSliceData::fromSlice(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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#include "moc_piechartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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