xylinechartitem.cpp
67 lines
| 1.6 KiB
| text/x-c
|
CppLexer
Michal Klocek
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r21 | #include "xylinechartitem_p.h" | ||
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Michal Klocek
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r67 | #include "axisitem_p.h" | ||
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Michal Klocek
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r21 | #include "qxychartseries.h" | ||
| #include <QPainter> | ||||
| #include <QStyleOptionGraphicsItem> | ||||
| #include <QDebug> | ||||
Tero Ahola
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r30 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
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Michal Klocek
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r21 | |||
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Michal Klocek
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r67 | XYLineChartItem::XYLineChartItem(QXYChartSeries* series,QGraphicsItem *parent):ChartItem(parent), | ||
| m_series(series), | ||||
| m_dirty(false) | ||||
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Michal Klocek
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r21 | { | ||
| } | ||||
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Michal Klocek
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r67 | void XYLineChartItem::setSize(const QSize& size) | ||
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Michal Klocek
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r21 | { | ||
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Michal Klocek
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r67 | m_rect=QRect(0,0,size.width(),size.height()); | ||
| m_dirty=true; | ||||
| } | ||||
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Michal Klocek
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r25 | |||
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Michal Klocek
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r67 | void XYLineChartItem::setPlotDomain(const PlotDomain& data) | ||
| { | ||||
| m_plotDomain=data; | ||||
| m_dirty=true; | ||||
| } | ||||
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Michal Klocek
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r25 | |||
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Michal Klocek
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r67 | QRectF XYLineChartItem::boundingRect() const | ||
| { | ||||
| return m_polyline.boundingRect(); | ||||
| } | ||||
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Michal Klocek
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r25 | |||
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Michal Klocek
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r67 | void XYLineChartItem::updateGeometry() | ||
| { | ||||
| if (!m_rect.isValid()) return; | ||||
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Michal Klocek
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r25 | |||
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Michal Klocek
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r67 | const qreal deltaX = (m_rect.width()-1)/m_plotDomain.spanX(); | ||
| const qreal deltaY = (m_rect.height()-1)/m_plotDomain.spanY(); | ||||
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Michal Klocek
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r25 | |||
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Michal Klocek
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r67 | m_polyline.clear(); | ||
| m_polyline.resize(m_series->count()); | ||||
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Michal Klocek
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r25 | |||
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Michal Klocek
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r67 | for (int j = 0; j < m_series->count(); ++j) { | ||
| qreal dx = m_series->x(j) - m_plotDomain.m_minX; | ||||
| qreal dy = m_series->y(j) - m_plotDomain.m_minY; | ||||
| qreal x = (dx * deltaX) + m_rect.left(); | ||||
| qreal y = - (dy * deltaY) + m_rect.bottom(); | ||||
| m_polyline[j] = QPointF(x, y); | ||||
| } | ||||
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Michal Klocek
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r21 | |||
| } | ||||
| void XYLineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget) | ||||
| { | ||||
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Michal Klocek
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r67 | //TODO: remove it | ||
| if (m_dirty) { | ||||
| updateGeometry(); | ||||
| m_dirty=false; | ||||
| } | ||||
| painter->setClipRect(m_rect.adjusted(+1, +1, -1, -1)); | ||||
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Michal Klocek
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r21 | painter->setPen(m_series->color()); | ||
| painter->drawPolyline(m_polyline); | ||||
| } | ||||
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Tero Ahola
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r30 | QTCOMMERCIALCHART_END_NAMESPACE | ||