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#include "linechartitem_p.h"
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#include "qlineseries.h"
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#include "chartpresenter_p.h"
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#include <QPainter>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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//TODO: optimize : remove points which are not visible
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LineChartItem::LineChartItem(QLineSeries* series,QGraphicsItem *parent):XYChartItem(series,parent),
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m_series(series),
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m_pointsVisible(false)
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{
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setZValue(ChartPresenter::LineChartZValue);
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QObject::connect(series,SIGNAL(updated()),this,SLOT(handleUpdated()));
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handleUpdated();
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}
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QRectF LineChartItem::boundingRect() const
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{
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return m_rect;
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}
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QPainterPath LineChartItem::shape() const
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{
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return m_path;
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}
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void LineChartItem::setLayout(QVector<QPointF>& points)
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{
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if(points.size()==0)
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{
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XYChartItem::setLayout(points);
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return;
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}
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QList<QGraphicsItem*> items = m_items.childItems();
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QPainterPath linePath(points.at(0));
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for(int i=1; i< points.size();i++) {
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linePath.lineTo(points.at(i));
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}
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prepareGeometryChange();
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m_path = linePath;
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m_rect = linePath.boundingRect();
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XYChartItem::setLayout(points);
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}
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void LineChartItem::handleUpdated()
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{
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m_pointsVisible = m_series->pointsVisible();
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m_linePen = m_series->pen();
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m_pointPen = m_series->pen();
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m_pointPen.setWidthF(2*m_pointPen.width());
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update();
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}
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//painter
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void LineChartItem::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->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(points());
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}
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painter->restore();
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}
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#include "moc_linechartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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