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#include "splinepresenter_p.h"
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#include <QPainter>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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SplinePresenter::SplinePresenter(QSplineSeries* series, QGraphicsObject *parent) :
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LineChartItem(0, series, parent)//,m_boundingRect()
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{
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//
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}
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QPointF SplinePresenter::calculateGeometryControlPoint(int index) const
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{
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QSplineSeries* splineSeries = qobject_cast<QSplineSeries*>(m_series);
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const qreal deltaX = m_size.width()/m_domain.spanX();
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const qreal deltaY = m_size.height()/m_domain.spanY();
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qreal x = (splineSeries->controlPoint(index).x() - m_domain.m_minX)* deltaX;
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qreal y = (splineSeries->controlPoint(index).y() - m_domain.m_minY)*-deltaY + m_size.height();
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return QPointF(x,y);
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}
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void SplinePresenter::applyGeometry(QVector<QPointF>& points)
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{
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if(points.size()==0) return;
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QPainterPath splinePath;
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const QPointF& point = points.at(0);
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splinePath.moveTo(point);
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QSplineSeries* splineSeries = qobject_cast<QSplineSeries*>(m_series);
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for (int i = 0; i < splineSeries->count() - 1; i++)
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{
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const QPointF& point = points.at(i + 1);
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splinePath.cubicTo(calculateGeometryControlPoint(2 * i), calculateGeometryControlPoint(2 * i + 1), point);
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}
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prepareGeometryChange();
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m_path = splinePath;
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m_rect = splinePath.boundingRect();
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}
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void SplinePresenter::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_pen);
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painter->setClipRect(m_clipRect);
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painter->drawPath(m_path);
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QSplineSeries* splineSeries = qobject_cast<QSplineSeries*>(m_series);
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for (int i = 0; i < splineSeries->count() - 1; i++)
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{
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painter->setPen(Qt::red);
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painter->drawEllipse(m_points[i], 4, 4);
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painter->setPen(Qt::blue);
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// painter->drawLine(m_series->at(i), m_series->controlPoint(2 * i));
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// painter->drawLine(m_series->at(i + 1), m_series->controlPoint(2 * i + 1));
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painter->drawEllipse(calculateGeometryControlPoint(2 * i), 4, 4);
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painter->drawEllipse(calculateGeometryControlPoint(2 * i + 1), 4, 4);
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}
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painter->setPen(Qt::red);
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painter->drawEllipse(m_points[m_points.count() - 1], 4, 4);
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painter->restore();
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}
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#include "moc_splinepresenter_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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