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#include "scatterchartitem_p.h"
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#include "qscatterseries.h"
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#include "chartpresenter_p.h"
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#include <QPainter>
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#include <QGraphicsScene>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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ScatterChartItem::ScatterChartItem(QScatterSeries *series, ChartPresenter *presenter) :
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XYChartItem(series,presenter),
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m_series(series),
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m_items(this),
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m_shape(QScatterSeries::MarkerShapeRectangle),
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m_size(15)
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{
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QObject::connect(m_series,SIGNAL(updated()), this, SLOT(handleUpdated()));
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setZValue(ChartPresenter::ScatterSeriesZValue);
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setFlags(QGraphicsItem::ItemHasNoContents);
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setFlags(QGraphicsItem::ItemClipsChildrenToShape);
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handleUpdated();
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m_items.setHandlesChildEvents(false);
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// TODO: how to draw a drop shadow?
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// QGraphicsDropShadowEffect *dropShadow = new QGraphicsDropShadowEffect();
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// dropShadow->setOffset(2.0);
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// dropShadow->setBlurRadius(2.0);
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// setGraphicsEffect(dropShadow);
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}
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QRectF ScatterChartItem::boundingRect() const
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{
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return m_rect;
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}
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void ScatterChartItem::createPoints(int count)
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{
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for (int i = 0; i < count; ++i) {
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QGraphicsItem *item = 0;
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switch (m_shape) {
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case QScatterSeries::MarkerShapeCircle:{
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QGraphicsEllipseItem* i = new QGraphicsEllipseItem(0,0,m_size,m_size);
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const QRectF& rect = i->boundingRect();
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i->setPos(-rect.width()/2,-rect.height()/2);
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item = new Marker(i,this);
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break;
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}
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case QScatterSeries::MarkerShapeRectangle:{
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QGraphicsRectItem* i = new QGraphicsRectItem(0,0,m_size,m_size);
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i->setPos(-m_size/2,-m_size/2);
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item = new Marker(i,this);
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break;
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}
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default:
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qWarning()<<"Unsupported marker type";
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break;
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}
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m_items.addToGroup(item);
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}
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}
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void ScatterChartItem::deletePoints(int count)
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{
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QList<QGraphicsItem *> items = m_items.childItems();
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for (int i = 0; i < count; ++i) {
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delete(items.takeLast());
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}
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}
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void ScatterChartItem::markerSelected(Marker* marker)
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{
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emit XYChartItem::clicked(QPointF(m_series->x(marker->index()), m_series->y(marker->index())));
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}
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void ScatterChartItem::setLayout(QVector<QPointF>& points)
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{
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if(points.size()==0)
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{
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XYChartItem::setLayout(points);
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return;
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}
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int diff = XYChartItem::points().size() - points.size();
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if(diff>0) {
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deletePoints(diff);
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}
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else if(diff<0) {
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createPoints(-diff);
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}
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if(diff!=0) handleUpdated();
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QList<QGraphicsItem*> items = m_items.childItems();
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for(int i=0; i< points.size();i++) {
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Marker* item = static_cast<Marker*>(items.at(i));
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const QPointF& point = points.at(i);
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const QRectF& rect = item->boundingRect();
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item->setIndex(i);
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item->setPos(point.x()-rect.width()/2,point.y()-rect.height()/2);
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if(!clipRect().contains(point)) {
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item->setVisible(false);
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}
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else {
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item->setVisible(true);
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}
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}
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prepareGeometryChange();
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m_rect = clipRect();
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XYChartItem::setLayout(points);
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}
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void ScatterChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(painter)
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Q_UNUSED(option)
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Q_UNUSED(widget)
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}
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void ScatterChartItem::setPen(const QPen& pen)
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{
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foreach(QGraphicsItem* item , m_items.childItems()) {
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static_cast<Marker*>(item)->setPen(pen);
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}
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}
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void ScatterChartItem::setBrush(const QBrush& brush)
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{
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foreach(QGraphicsItem* item , m_items.childItems()) {
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static_cast<Marker*>(item)->setBrush(brush);
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}
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}
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void ScatterChartItem::handleUpdated()
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{
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int count = m_items.childItems().count();
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if(count==0) return;
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bool recreate = m_size != m_series->size() || m_shape != m_series->shape();
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//TODO: only rewrite on size change
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m_size = m_series->size();
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m_shape = m_series->shape();
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if(recreate){
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deletePoints(count);
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createPoints(count);
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}
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setPen(m_series->pen());
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setBrush(m_series->brush());
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}
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#include "moc_scatterchartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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