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