linechartitem.cpp
225 lines
| 5.5 KiB
| text/x-c
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CppLexer
Michal Klocek
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r144 | #include "linechartitem_p.h" | ||
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Michal Klocek
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r349 | #include "qlineseries.h" | ||
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Michal Klocek
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r131 | #include "chartpresenter_p.h" | ||
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Michal Klocek
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r21 | #include <QPainter> | ||
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r144 | |||
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r21 | |||
Tero Ahola
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r30 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
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r21 | |||
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r391 | //TODO: optimize : remove points which are not visible | ||
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r150 | |||
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r349 | LineChartItem::LineChartItem(ChartPresenter* presenter, QLineSeries* series,QGraphicsItem *parent):ChartItem(parent), | ||
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r131 | m_presenter(presenter), | ||
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r391 | m_series(series), | ||
| m_items(this) | ||||
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r21 | { | ||
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r391 | //m_items.setZValue(ChartPresenter::LineChartZValue); | ||
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r262 | setZValue(ChartPresenter::LineChartZValue); | ||
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r421 | |||
| QObject::connect(presenter,SIGNAL(geometryChanged(const QRectF&)),this,SLOT(handleGeometryChanged(const QRectF&))); | ||||
| QObject::connect(series,SIGNAL(pointReplaced(int)),this,SLOT(handlePointReplaced(int))); | ||||
| QObject::connect(series,SIGNAL(pointAdded(int)),this,SLOT(handlePointAdded(int))); | ||||
| QObject::connect(series,SIGNAL(pointRemoved(int)),this,SLOT(handlePointRemoved(int))); | ||||
| QObject::connect(series,SIGNAL(updated()),this,SLOT(handleUpdated())); | ||||
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r21 | } | ||
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r144 | QRectF LineChartItem::boundingRect() const | ||
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r103 | { | ||
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r131 | return m_rect; | ||
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Tero Ahola
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r103 | } | ||
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r85 | |||
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r144 | QPainterPath LineChartItem::shape() const | ||
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Michal Klocek
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r67 | { | ||
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r131 | return m_path; | ||
| } | ||||
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r85 | |||
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r389 | void LineChartItem::createPoints(int count) | ||
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r131 | { | ||
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r389 | for (int i = 0; i < count; ++i) { | ||
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r391 | QGraphicsRectItem* item = new QGraphicsRectItem(0,0,3,3); | ||
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r389 | m_items.addToGroup(item); | ||
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r131 | } | ||
| } | ||||
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r389 | void LineChartItem::clearPoints(int count) | ||
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r131 | { | ||
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r389 | QList<QGraphicsItem *> items = m_items.childItems(); | ||
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r131 | |||
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r389 | for (int i = 0; i < count; ++i) { | ||
| delete(items.takeLast()); | ||||
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r131 | } | ||
| } | ||||
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r391 | QPointF LineChartItem::calculateGeometryPoint(int index) const | ||
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r85 | { | ||
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r389 | const qreal deltaX = m_size.width()/m_domain.spanX(); | ||
| const qreal deltaY = m_size.height()/m_domain.spanY(); | ||||
| qreal x = (m_series->x(index) - m_domain.m_minX)* deltaX; | ||||
| qreal y = (m_series->y(index) - m_domain.m_minY)*-deltaY + m_size.height(); | ||||
| return QPointF(x,y); | ||||
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r85 | } | ||
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r131 | |||
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r391 | QVector<QPointF> LineChartItem::calculateGeometryPoints() const | ||
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r131 | { | ||
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r389 | const qreal deltaX = m_size.width()/m_domain.spanX(); | ||
| const qreal deltaY = m_size.height()/m_domain.spanY(); | ||||
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r131 | |||
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r391 | QVector<QPointF> points; | ||
| points.reserve(m_series->count()); | ||||
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r389 | for (int i = 0; i < m_series->count(); ++i) { | ||
| qreal x = (m_series->x(i) - m_domain.m_minX)* deltaX; | ||||
| qreal y = (m_series->y(i) - m_domain.m_minY)*-deltaY + m_size.height(); | ||||
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r131 | points << QPointF(x,y); | ||
| } | ||||
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r391 | return points; | ||
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r131 | } | ||
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r391 | void LineChartItem::updateItem(QVector<QPointF>& oldPoints,QVector<QPointF>& newPoints) | ||
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r131 | { | ||
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r391 | applyGeometry(newPoints); | ||
| oldPoints = newPoints; | ||||
| } | ||||
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r389 | |||
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r391 | void LineChartItem::updateItem(QVector<QPointF>& oldPoints,int index,QPointF& newPoint) | ||
| { | ||||
| oldPoints.replace(index,newPoint); | ||||
| applyGeometry(oldPoints); | ||||
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r131 | } | ||
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r389 | void LineChartItem::applyGeometry(QVector<QPointF>& points) | ||
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r67 | { | ||
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r389 | if(points.size()==0) return; | ||
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r25 | |||
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r389 | QList<QGraphicsItem*> items = m_items.childItems(); | ||
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r25 | |||
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r85 | QPainterPath path; | ||
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r389 | const QPointF& point = points.at(0); | ||
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r131 | path.moveTo(point); | ||
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r389 | QGraphicsItem* item = items.at(0); | ||
| item->setPos(point.x()-1,point.y()-1); | ||||
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r391 | if(!m_clipRect.contains(point)) item->setVisible(false); | ||
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r389 | |||
| for(int i=1 ; i< points.size();i++) { | ||||
| QGraphicsItem* item = items.at(i); | ||||
| const QPointF& point = points.at(i); | ||||
| item->setPos(point.x()-1,point.y()-1); | ||||
| if(!m_clipRect.contains(point)) item->setVisible(false); | ||||
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Michal Klocek
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r131 | path.lineTo(point); | ||
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r67 | } | ||
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r21 | |||
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r389 | prepareGeometryChange(); | ||
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r131 | m_path = path; | ||
| m_rect = path.boundingRect(); | ||||
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r21 | } | ||
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r144 | void LineChartItem::setPen(const QPen& pen) | ||
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r131 | { | ||
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r139 | m_pen = pen; | ||
| } | ||||
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r131 | |||
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r139 | //handlers | ||
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r131 | |||
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r389 | void LineChartItem::handlePointAdded(int index) | ||
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r139 | { | ||
| Q_ASSERT(index<m_series->count()); | ||||
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r389 | Q_ASSERT(index>=0); | ||
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r391 | QPointF point = calculateGeometryPoint(index); | ||
| createPoints(1); | ||||
| QVector<QPointF> points = m_points; | ||||
| points.insert(index,point); | ||||
| updateItem(m_points,points); | ||||
| update(); | ||||
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Michal Klocek
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r389 | } | ||
| void LineChartItem::handlePointRemoved(int index) | ||||
| { | ||||
| Q_ASSERT(index<m_series->count()); | ||||
| Q_ASSERT(index>=0); | ||||
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Michal Klocek
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r391 | QPointF point = calculateGeometryPoint(index); | ||
| clearPoints(1); | ||||
| QVector<QPointF> points = m_points; | ||||
| points.remove(index); | ||||
| updateItem(m_points,points); | ||||
| update(); | ||||
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Michal Klocek
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r389 | } | ||
| void LineChartItem::handlePointReplaced(int index) | ||||
| { | ||||
| Q_ASSERT(index<m_series->count()); | ||||
| Q_ASSERT(index>=0); | ||||
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r391 | QPointF point = calculateGeometryPoint(index); | ||
| updateItem(m_points,index,point); | ||||
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r139 | update(); | ||
| } | ||||
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r131 | |||
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r144 | void LineChartItem::handleDomainChanged(const Domain& domain) | ||
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r139 | { | ||
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r391 | |||
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r139 | m_domain = domain; | ||
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r391 | |||
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r389 | if(m_domain.isEmpty()) return; | ||
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r391 | if(!m_clipRect.isValid()) return; | ||
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r389 | |||
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r391 | QVector<QPointF> points = calculateGeometryPoints(); | ||
| int diff = m_points.size() - points.size(); | ||||
| if(diff>0) { | ||||
| clearPoints(diff); | ||||
| } | ||||
| else if(diff<0) { | ||||
| createPoints(-diff); | ||||
| } | ||||
| updateItem(m_points,points); | ||||
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r131 | update(); | ||
| } | ||||
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r144 | void LineChartItem::handleGeometryChanged(const QRectF& rect) | ||
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r139 | { | ||
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r391 | Q_ASSERT(rect.isValid()); | ||
| m_size=rect.size(); | ||||
| m_clipRect=rect.translated(-rect.topLeft()); | ||||
| setPos(rect.topLeft()); | ||||
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r389 | |||
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r391 | if(m_domain.isEmpty()) return; | ||
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r389 | |||
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r391 | QVector<QPointF> points = calculateGeometryPoints(); | ||
| int diff = m_points.size() - points.size(); | ||||
| if(diff>0) { | ||||
| clearPoints(diff); | ||||
| } | ||||
| else if(diff<0) { | ||||
| createPoints(-diff); | ||||
| } | ||||
| updateItem(m_points,points); | ||||
| update(); | ||||
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Michal Klocek
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r389 | } | ||
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r392 | void LineChartItem::handleUpdated() | ||
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Michal Klocek
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r389 | { | ||
| m_items.setVisible(m_series->pointsVisible()); | ||||
| setPen(m_series->pen()); | ||||
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r139 | update(); | ||
| } | ||||
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r391 | //painter | ||
| void LineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) | ||||
| { | ||||
| Q_UNUSED(widget); | ||||
| Q_UNUSED(option); | ||||
| painter->save(); | ||||
| painter->setPen(m_pen); | ||||
| painter->setClipRect(m_clipRect); | ||||
| painter->drawPath(m_path); | ||||
| painter->restore(); | ||||
| } | ||||
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Michal Klocek
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r139 | |||
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Michal Klocek
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r144 | #include "moc_linechartitem_p.cpp" | ||
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Michal Klocek
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r131 | |||
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Tero Ahola
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r30 | QTCOMMERCIALCHART_END_NAMESPACE | ||