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/****************************************************************************
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**
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** Copyright (C) 2013 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 "areachartitem_p.h"
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#include "qareaseries.h"
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#include "qareaseries_p.h"
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#include "qlineseries.h"
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#include "chartpresenter_p.h"
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#include "abstractdomain_p.h"
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#include <QPainter>
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#include <QGraphicsSceneMouseEvent>
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#include <QDebug>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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//TODO: optimize : remove points which are not visible
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AreaChartItem::AreaChartItem(QAreaSeries *areaSeries, QGraphicsItem* item)
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: ChartItem(areaSeries->d_func(),item),
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m_series(areaSeries),
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m_upper(0),
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m_lower(0),
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m_pointsVisible(false)
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{
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setAcceptHoverEvents(true);
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setZValue(ChartPresenter::LineChartZValue);
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m_upper = new AreaBoundItem(this, m_series->upperSeries());
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if (m_series->lowerSeries())
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m_lower = new AreaBoundItem(this, m_series->lowerSeries());
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QObject::connect(m_series->d_func(), SIGNAL(updated()), this, SLOT(handleUpdated()));
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QObject::connect(m_series, SIGNAL(visibleChanged()), this, SLOT(handleUpdated()));
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QObject::connect(m_series, SIGNAL(opacityChanged()), this, SLOT(handleUpdated()));
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QObject::connect(this, SIGNAL(clicked(QPointF)), areaSeries, SIGNAL(clicked(QPointF)));
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QObject::connect(this, SIGNAL(hovered(QPointF,bool)), areaSeries, SIGNAL(hovered(QPointF,bool)));
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handleUpdated();
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}
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AreaChartItem::~AreaChartItem()
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{
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delete m_upper;
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delete m_lower;
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}
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void AreaChartItem::setPresenter(ChartPresenter *presenter)
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{
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m_upper->setPresenter(presenter);
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if (m_lower) {
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m_lower->setPresenter(presenter);
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}
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ChartItem::setPresenter(presenter);
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}
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QRectF AreaChartItem::boundingRect() const
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{
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return m_rect;
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}
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QPainterPath AreaChartItem::shape() const
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{
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return m_path;
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}
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void AreaChartItem::updatePath()
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{
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QPainterPath path;
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QRectF rect(QPointF(0,0),domain()->size());
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path = m_upper->path();
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if (m_lower) {
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// Note: Polarcharts always draw area correctly only when both series have equal width or are
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// fully displayed. If one series is partally off-chart, the connecting line between
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// the series does not attach to the end of the partially hidden series but to the point
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// where it intersects the axis line. The problem is especially noticeable when one of the series
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// is entirely off-chart, in which case the connecting line connects two ends of the
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// visible series.
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// This happens because we get the paths from linechart, which omits off-chart segments.
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// To properly fix, linechart would need to provide true full path, in right, left, and the rest
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// portions to enable proper clipping. However, combining those to single visually unified area
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// would be a nightmare, since they would have to be painted separately.
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path.connectPath(m_lower->path().toReversed());
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} else {
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QPointF first = path.pointAtPercent(0);
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QPointF last = path.pointAtPercent(1);
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if (presenter()->chartType() == QChart::ChartTypeCartesian) {
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path.lineTo(last.x(), rect.bottom());
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path.lineTo(first.x(), rect.bottom());
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} else { // polar
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path.lineTo(rect.center());
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}
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}
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path.closeSubpath();
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prepareGeometryChange();
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m_path = path;
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m_rect = path.boundingRect();
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update();
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}
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void AreaChartItem::handleUpdated()
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{
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setVisible(m_series->isVisible());
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m_pointsVisible = m_series->pointsVisible();
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m_linePen = m_series->pen();
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m_brush = m_series->brush();
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m_pointPen = m_series->pen();
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m_pointPen.setWidthF(2 * m_pointPen.width());
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setOpacity(m_series->opacity());
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update();
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}
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void AreaChartItem::handleDomainUpdated()
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{
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AbstractDomain* d = m_upper->domain();
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d->setSize(domain()->size());
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d->setRange(domain()->minX(),domain()->maxX(),domain()->minY(),domain()->maxY());
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m_upper->handleDomainUpdated();
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if (m_lower) {
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AbstractDomain* d = m_lower->domain();
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d->setSize(domain()->size());
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d->setRange(domain()->minX(),domain()->maxX(),domain()->minY(),domain()->maxY());
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m_lower->handleDomainUpdated();
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}
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}
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void AreaChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(widget)
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Q_UNUSED(option)
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painter->save();
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painter->setPen(m_linePen);
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painter->setBrush(m_brush);
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QRectF clipRect = QRectF(QPointF(0, 0), domain()->size());
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if (presenter()->chartType() == QChart::ChartTypePolar)
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painter->setClipRegion(QRegion(clipRect.toRect(), QRegion::Ellipse));
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else
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painter->setClipRect(clipRect);
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painter->drawPath(m_path);
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if (m_pointsVisible) {
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painter->setPen(m_pointPen);
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painter->drawPoints(m_upper->geometryPoints());
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if (m_lower)
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painter->drawPoints(m_lower->geometryPoints());
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}
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painter->restore();
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}
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void AreaChartItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
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{
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emit clicked(m_upper->domain()->calculateDomainPoint(event->pos()));
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ChartItem::mousePressEvent(event);
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}
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void AreaChartItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
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{
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emit hovered(domain()->calculateDomainPoint(event->pos()), true);
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event->accept();
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// QGraphicsItem::hoverEnterEvent(event);
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}
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void AreaChartItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
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{
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emit hovered(domain()->calculateDomainPoint(event->pos()), false);
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event->accept();
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// QGraphicsItem::hoverEnterEvent(event);
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}
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#include "moc_areachartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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