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#include "xylinechartitem_p.h"
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#include "axisitem_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) :
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ChartItem(parent),
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m_series(series),
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m_pathItem(new QGraphicsPathItem(this))
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{
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setFlags(QGraphicsItem::ItemClipsChildrenToShape);
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}
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void XYLineChartItem::setSize(const QSize &size)
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{
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m_rect = QRect(0, 0, size.width(), size.height());
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prepareGeometryChange();
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updateGeometry();
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}
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void XYLineChartItem::setPlotDomain(const PlotDomain& data)
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{
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m_plotDomain=data;
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prepareGeometryChange();
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updateGeometry();
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}
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QRectF XYLineChartItem::boundingRect() const
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{
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return m_rect;
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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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m_pathItem->setPen(m_series->pen());
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}
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/*
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QPainterPath XYLineChartItem::shape() const
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{
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return m_pathItem->shape();
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}
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*/
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void XYLineChartItem::updateGeometry()
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{
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if (!m_rect.isValid()) return;
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const qreal deltaX = m_rect.width()/m_plotDomain.spanX();
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const qreal deltaY = m_rect.height()/m_plotDomain.spanY();
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QPainterPath path;
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for (int j = 0; j < m_series->count(); ++j) {
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qreal dx = m_series->x(j) - m_plotDomain.m_minX;
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qreal dy = m_series->y(j) - m_plotDomain.m_minY;
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qreal x = (dx * deltaX) + m_rect.left();
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qreal y = - (dy * deltaY) + m_rect.bottom();
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if(j==0) path.moveTo(x,y);
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else path.lineTo(x,y);
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}
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m_pathItem->setPath(path);
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m_pathItem->setPen(m_series->pen());
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m_pathItem->setBrush(Qt::NoBrush);
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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