linechartitem.cpp
122 lines
| 2.7 KiB
| text/x-c
|
CppLexer
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r144 | #include "linechartitem_p.h" | ||
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r349 | #include "qlineseries.h" | ||
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r131 | #include "chartpresenter_p.h" | ||
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r21 | #include <QPainter> | ||
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r144 | |||
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r21 | |||
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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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r465 | LineChartItem::LineChartItem(QLineSeries* series,QGraphicsItem *parent):XYChartItem(series,parent), | ||
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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(series,SIGNAL(updated()),this,SLOT(handleUpdated())); | ||
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r439 | 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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r103 | } | ||
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r85 | |||
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r144 | QPainterPath LineChartItem::shape() const | ||
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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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r465 | void LineChartItem::deletePoints(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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r465 | void LineChartItem::setGeometry(QVector<QPointF>& points) | ||
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r131 | { | ||
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r465 | if(points.size()==0) return; | ||
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r464 | |||
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r465 | int diff = XYChartItem::points().size() - points.size(); | ||
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r464 | |||
if(diff>0) { | ||||
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r465 | deletePoints(diff); | ||
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r464 | } | ||
else if(diff<0) { | ||||
createPoints(-diff); | ||||
} | ||||
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r465 | QList<QGraphicsItem*> items = m_items.childItems(); | ||
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r464 | |||
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r465 | QPainterPath path; | ||
const QPointF& point = points.at(0); | ||||
path.moveTo(point); | ||||
QGraphicsItem* item = items.at(0); | ||||
item->setPos(point.x()-1,point.y()-1); | ||||
if(!clipRect().contains(point)) { | ||||
item->setVisible(false); | ||||
} | ||||
else { | ||||
item->setVisible(true); | ||||
} | ||||
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r464 | |||
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r465 | 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(!clipRect().contains(point)) { | ||||
item->setVisible(false); | ||||
} | ||||
else { | ||||
item->setVisible(true); | ||||
} | ||||
path.lineTo(point); | ||||
} | ||||
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r464 | |||
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r465 | prepareGeometryChange(); | ||
m_path = path; | ||||
m_rect = path.boundingRect(); | ||||
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r131 | |||
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r465 | XYChartItem::setGeometry(points); | ||
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r21 | } | ||
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r476 | void LineChartItem::setLinePen(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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r392 | void LineChartItem::handleUpdated() | ||
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r389 | { | ||
m_items.setVisible(m_series->pointsVisible()); | ||||
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r476 | setLinePen(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); | ||||
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r465 | painter->setClipRect(clipRect()); | ||
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r391 | painter->drawPath(m_path); | ||
painter->restore(); | ||||
} | ||||
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r144 | #include "moc_linechartitem_p.cpp" | ||
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r131 | |||
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r30 | QTCOMMERCIALCHART_END_NAMESPACE | ||