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legend documentation fix. detaching and attaching the legend
legend documentation fix. detaching and attaching the legend

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r677:2b967c4f6e8e
r728:7d3fdc2fff63
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linechartitem.cpp
83 lines | 1.7 KiB | text/x-c | CppLexer
#include "linechartitem_p.h"
#include "qlineseries.h"
#include "chartpresenter_p.h"
#include <QPainter>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
//TODO: optimize : remove points which are not visible
LineChartItem::LineChartItem(QLineSeries* series,ChartPresenter *presenter):XYChartItem(series,presenter),
m_series(series),
m_pointsVisible(false)
{
setZValue(ChartPresenter::LineChartZValue);
QObject::connect(series,SIGNAL(updated()),this,SLOT(handleUpdated()));
handleUpdated();
}
QRectF LineChartItem::boundingRect() const
{
return m_rect;
}
QPainterPath LineChartItem::shape() const
{
return m_path;
}
void LineChartItem::setLayout(QVector<QPointF>& points)
{
if(points.size()==0)
{
XYChartItem::setLayout(points);
return;
}
QList<QGraphicsItem*> items = m_items.childItems();
QPainterPath linePath(points.at(0));
for(int i=1; i< points.size();i++) {
linePath.lineTo(points.at(i));
}
prepareGeometryChange();
m_path = linePath;
m_rect = linePath.boundingRect();
XYChartItem::setLayout(points);
}
void LineChartItem::handleUpdated()
{
m_pointsVisible = m_series->pointsVisible();
m_linePen = m_series->pen();
m_pointPen = m_series->pen();
m_pointPen.setWidthF(2*m_pointPen.width());
update();
}
//painter
void LineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(widget)
Q_UNUSED(option)
painter->save();
painter->setPen(m_linePen);
painter->setClipRect(clipRect());
painter->drawPath(m_path);
if(m_pointsVisible){
painter->setPen(m_pointPen);
painter->drawPoints(points());
}
painter->restore();
}
#include "moc_linechartitem_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE