#include "splinechartitem_p.h" #include "chartpresenter_p.h" #include QTCOMMERCIALCHART_BEGIN_NAMESPACE SplineChartItem::SplineChartItem(QSplineSeries* series, QGraphicsItem *parent) : XYChartItem(series, parent), m_series(series) { setZValue(ChartPresenter::LineChartZValue); QObject::connect(series,SIGNAL(updated()),this,SLOT(handleUpdated())); handleUpdated(); } QRectF SplineChartItem::boundingRect() const { return m_rect; } QPainterPath SplineChartItem::shape() const { return m_path; } QPointF SplineChartItem::calculateGeometryControlPoint(int index) const { return XYChartItem::calculateGeometryPoint(m_series->controlPoint(index)); } void SplineChartItem::setGeometry(QVector& points) { if(points.size()==0) return; QPainterPath splinePath; const QPointF& point = points.at(0); splinePath.moveTo(point); for (int i = 0; i < points.size() - 1; i++) { const QPointF& point = points.at(i + 1); splinePath.cubicTo(calculateGeometryControlPoint(2 * i), calculateGeometryControlPoint(2 * i + 1), point); } prepareGeometryChange(); m_path = splinePath; m_rect = splinePath.boundingRect(); XYChartItem::setGeometry(points); } void SplineChartItem::setLinePen(const QPen& pen) { m_pen = pen; } //handlers void SplineChartItem::handleUpdated() { //m_items.setVisible(m_series->pointsVisible()); setLinePen(m_series->pen()); update(); } //painter void SplineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) { Q_UNUSED(widget); Q_UNUSED(option); painter->save(); painter->setClipRect(clipRect()); painter->setPen(m_pen); painter->drawPath(m_path); const QVector points = XYChartItem::points(); for (int i = 0; i < points.size() - 1; i++) { painter->setPen(Qt::red); painter->drawEllipse(points[i], 2, 2); painter->setPen(Qt::blue); // painter->drawLine(m_series->at(i), m_series->controlPoint(2 * i)); // painter->drawLine(m_series->at(i + 1), m_series->controlPoint(2 * i + 1)); // painter->drawEllipse(calculateGeometryControlPoint(2 * i), 4, 4); // painter->drawEllipse(calculateGeometryControlPoint(2 * i + 1), 4, 4); } if (points.count() > 0) { painter->setPen(Qt::red); painter->drawEllipse(points[points.count() - 1], 2, 2); } painter->restore(); } #include "moc_splinechartitem_p.cpp" QTCOMMERCIALCHART_END_NAMESPACE