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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, QGraphicsItem *parent) :
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XYChartItem(series,parent),
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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(10)
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{
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Q_ASSERT(parent);
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Q_ASSERT(series);
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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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// 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;
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switch (m_shape) {
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case QScatterSeries::MarkerShapeDefault:
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// Fallthrough, defaults to circle
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case QScatterSeries::MarkerShapeCircle:
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item = new QGraphicsEllipseItem(0,0,m_size,m_size);
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break;
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case QScatterSeries::MarkerShapeRectangle:
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item = new QGraphicsRectItem(0,0,m_size,m_size);
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break;
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case QScatterSeries::MarkerShapeRoundedRectangle:
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//m_path.addRoundedRect(x, y, size, size, size / 4.0, size / 4.0);
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break;
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case QScatterSeries::MarkerShapeTiltedRectangle:
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// TODO: tilt the rectangle
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//m_path.addRect(x, y, size, size);
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//break;
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case QScatterSeries::MarkerShapeTriangle:
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//QPolygonF polygon;
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//polygon << QPointF(0.0, -size) << QPointF(size / 2.0, 0.0) << QPointF(-size / 2, 0.0);
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// TODO: the position is not exactly right...
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//m_path.addPolygon(polygon.translated(x + size / 2.0, y + size));
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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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/*
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void ScatterChartItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
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{
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QPointF clickedPoint(
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m_minX + (event->lastPos().x() / m_clippingRect.width()) * (m_maxX-m_minX),
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m_maxY - (event->lastPos().y() / m_clippingRect.height()) * (m_maxY-m_minY));
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emit clicked(clickedPoint);
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}
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*/
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void ScatterChartItem::setGeometry(QVector<QPointF>& points)
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{
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if(points.size()==0) return;
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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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QGraphicsItem* item = items.at(i);
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const QPointF& point = points.at(i);
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item->setPos(point.x()-1,point.y()-1);
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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::setGeometry(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<QAbstractGraphicsShapeItem*>(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<QAbstractGraphicsShapeItem*>(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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