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#include "xylinechartitem_p.h"
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#include "axis_p.h"
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#include "xygrid_p.h"
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#include "qxychartseries.h"
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#include <QPainter>
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#include <QStyleOptionGraphicsItem>
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#include <QDebug>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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XYLineChartItem::XYLineChartItem(QXYChartSeries* series,QGraphicsItem *parent):QGraphicsItem(parent),
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m_series(series)
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{
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}
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void XYLineChartItem::updateXYPlotDomain(const XYPlotDomain& data)
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{
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m_xyPlotData=data;
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if (!m_xyPlotData.m_viewportRect.isValid())
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return;
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const QRect& rect = m_xyPlotData.m_viewportRect;
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const qreal deltaX = (rect.width()-1)/m_xyPlotData.spanX();
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const qreal deltaY = (rect.height()-1)/m_xyPlotData.spanY();
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m_polyline.clear();
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m_polyline.resize(m_series->count());
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for (int j = 0; j < m_series->count(); ++j) {
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qreal dx = m_series->x(j) - m_xyPlotData.m_minX;
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qreal dy = m_series->y(j) - m_xyPlotData.m_minY;
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qreal x = (dx * deltaX) + rect.left();
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qreal y = - (dy * deltaY) + rect.bottom();
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m_polyline[j] = QPointF(x, y);
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}
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}
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QRectF XYLineChartItem::boundingRect() const
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{
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return m_polyline.boundingRect();
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}
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void XYLineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget)
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{
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painter->setClipRect(m_xyPlotData.m_viewportRect.adjusted(+1, +1, -1, -1));
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painter->setPen(m_series->color());
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painter->drawPolyline(m_polyline);
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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