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#include "linechartitem_p.h"
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#include "qlinechartseries.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: optimazie : remove points which are not visible
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LineChartItem::LineChartItem(ChartPresenter* presenter, QLineChartSeries* series,QGraphicsItem *parent):ChartItem(parent),
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m_presenter(presenter),
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m_series(series),
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m_dirtyData(false),
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m_dirtyGeometry(false),
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m_dirtyDomain(false)
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{
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setZValue(ChartPresenter::LineChartZValue);
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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::addPoints(const QVector<QPointF>& points)
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{
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m_data = points;
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for(int i=0; i<m_data.size();i++){
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const QPointF& point =m_data[i];
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QGraphicsRectItem* item = new QGraphicsRectItem(0,0,3,3,this);
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item->setPos(point.x()-1,point.y()-1);;
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if(!m_clipRect.contains(point) || !m_series->isPointsVisible()) item->setVisible(false);
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m_points << item;
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}
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}
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void LineChartItem::addPoint(const QPointF& point)
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{
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m_data << point;
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QGraphicsRectItem* item = new QGraphicsRectItem(0,0,3,3,this);
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m_clipRect.contains(point);
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item->setPos(point.x()-1,point.y()-1);
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if(!m_clipRect.contains(point) || !m_series->isPointsVisible()) item->setVisible(false);
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m_points << item;
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}
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void LineChartItem::removePoint(const QPointF& point)
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{
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Q_ASSERT(m_data.count() == m_points.count());
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int index = m_data.lastIndexOf(point,0);
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m_data.remove(index);
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delete(m_points.takeAt(index));
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}
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void LineChartItem::setPoint(const QPointF& oldPoint,const QPointF& newPoint)
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{
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Q_ASSERT(m_data.count() == m_points.count());
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int index = m_data.lastIndexOf(oldPoint,0);
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if(index > -1){
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m_data.replace(index,newPoint);
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QGraphicsItem* item = m_points.at(index);
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item->setPos(newPoint.x()-1,newPoint.y()-1);
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}
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}
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void LineChartItem::setPoint(int index,const QPointF& point)
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{
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Q_ASSERT(m_data.count() == m_points.count());
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Q_ASSERT(index>=0);
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m_data.replace(index,point);
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QGraphicsItem* item = m_points.at(index);
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item->setPos(point.x()-1,point.y()-1);
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}
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void LineChartItem::clear()
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{
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qDeleteAll(m_points);
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m_points.clear();
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m_hash.clear();
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m_path = QPainterPath();
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m_rect = QRect();
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m_data.clear();
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}
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void LineChartItem::clearView()
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{
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qDeleteAll(m_points);
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m_points.clear();
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m_path = QPainterPath();
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m_rect = QRect();
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m_data.clear();
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}
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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_pen);
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painter->setClipRect(m_clipRect);
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painter->drawPath(m_path);
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painter->restore();
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}
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void LineChartItem::calculatePoint(QPointF& point, int index, const QLineChartSeries* series,const QSizeF& size, const Domain& domain) const
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{
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const qreal deltaX = size.width()/domain.spanX();
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const qreal deltaY = size.height()/domain.spanY();
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qreal x = (series->x(index) - domain.m_minX)* deltaX;
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qreal y = (series->y(index) - domain.m_minY)*-deltaY + size.height();
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point.setX(x);
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point.setY(y);
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}
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void LineChartItem::calculatePoints(QVector<QPointF>& points, QHash<int,int>& hash,const QLineChartSeries* series,const QSizeF& size, const Domain& domain) const
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{
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const qreal deltaX = size.width()/domain.spanX();
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const qreal deltaY = size.height()/domain.spanY();
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for (int i = 0; i < series->count(); ++i) {
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qreal x = (series->x(i) - domain.m_minX)* deltaX;
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qreal y = (series->y(i) - domain.m_minY)*-deltaY + size.height();
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hash[i] = points.size();
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points << QPointF(x,y);
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}
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}
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void LineChartItem::updateDomain()
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{
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clear();
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prepareGeometryChange();
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calculatePoints(m_data,m_hash,m_series,m_size, m_domain);
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addPoints(m_data);
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}
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void LineChartItem::updateData()
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{
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//for now the same
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updateDomain();
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}
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void LineChartItem::updateGeometry()
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{
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if(m_data.size()==0) return;
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prepareGeometryChange();
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QPainterPath path;
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const QPointF& point = m_data.at(0);
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path.moveTo(point);
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foreach( const QPointF& point , m_data) {
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path.lineTo(point);
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}
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m_path = path;
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m_rect = path.boundingRect();
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}
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void LineChartItem::setPen(const QPen& pen)
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{
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m_pen = pen;
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}
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//handlers
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void LineChartItem::handleModelChanged(int index)
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{
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Q_ASSERT(index<m_series->count());
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if(m_hash.contains(index)){
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int i = m_hash.value(index);
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QPointF point;
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calculatePoint(point,index,m_series,m_size,m_domain);
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setPoint(i,point);
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}
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update();
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}
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void LineChartItem::handleDomainChanged(const Domain& domain)
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{
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m_domain = domain;
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updateDomain();
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update();
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}
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void LineChartItem::handleGeometryChanged(const QRectF& rect)
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{
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Q_ASSERT(rect.isValid());
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m_size=rect.size();
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m_clipRect=rect.translated(-rect.topLeft());
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updateDomain();
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updateGeometry();
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setPos(rect.topLeft());
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update();
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}
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#include "moc_linechartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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