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#include "scatterpresenter_p.h"
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#include "qscatterseries.h"
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#include <QPen>
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#include <QPainter>
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#include <QGraphicsScene>
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#include <QDebug>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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ScatterPresenter::ScatterPresenter(QScatterSeries *series, QGraphicsObject *parent) :
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ChartItem(parent),
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m_series(series),
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m_boundingRect(),
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//m_markerColor(QColor()),
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// m_markerColor(QColor(255, 0, 0)),
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m_visibleChartArea()
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{
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if (parent)
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m_boundingRect = parent->boundingRect();
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if (series) {
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connect(series, SIGNAL(changed()), this, SLOT(handleModelChanged()));
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}
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}
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void ScatterPresenter::handleDomainChanged(const Domain& domain)
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{
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m_visibleChartArea = domain;
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changeGeometry();
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}
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void ScatterPresenter::handleGeometryChanged(const QRectF& rect)
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{
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m_boundingRect = rect;
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changeGeometry();
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}
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void ScatterPresenter::handleModelChanged()
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{
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// TODO: more fine grained modelChanged signaling
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changeGeometry();
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}
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void ScatterPresenter::paint(QPainter *painter, const QStyleOptionGraphicsItem */*option*/, QWidget */*widget*/)
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{
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// TODO: Optimization: avoid setting on every paint method call?
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// The custom settings in series override those defined by the theme
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if (m_series->markerPen().color().isValid()) {
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painter->setPen(m_series->markerPen());
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painter->setBrush(m_series->markerBrush());
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} else {
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painter->setPen(m_markerPen);
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painter->setBrush(m_markerBrush);
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}
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int shape = m_series->markerShape();
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for (int i(0); i < m_scenex.count() && i < m_sceney.count(); i++) {
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if (scene()->width() > m_scenex.at(i) && scene()->height() > m_sceney.at(i))
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// Paint a shape
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switch (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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painter->drawChord(m_scenex.at(i), m_sceney.at(i), 9, 9, 0, 5760);
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break;
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case QScatterSeries::MarkerShapePoint:
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painter->drawPoint(m_scenex.at(i), m_sceney.at(i));
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break;
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case QScatterSeries::MarkerShapeRectangle:
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painter->drawRect(m_scenex.at(i), m_sceney.at(i), 9, 9);
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break;
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case QScatterSeries::MarkerShapeTiltedRectangle:
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// TODO:
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static const QPointF points[4] = {
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QPointF(-1.0 + m_scenex.at(i), 0.0 + m_sceney.at(i)),
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QPointF(0.0 + m_scenex.at(i), 1.0 + m_sceney.at(i)),
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QPointF(1.0 + m_scenex.at(i), 0.0 + m_sceney.at(i)),
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QPointF(0.0 + m_scenex.at(i), -1.0 + m_sceney.at(i))
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};
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painter->drawPolygon(points, 4);
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break;
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default:
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// TODO: implement the rest of the shapes
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Q_ASSERT(false);
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break;
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}
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}
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}
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void ScatterPresenter::changeGeometry()
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{
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if (m_boundingRect.isValid()) {
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prepareGeometryChange();
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qreal scalex = m_boundingRect.width() / m_visibleChartArea.spanX();
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qreal scaley = m_boundingRect.height() / m_visibleChartArea.spanY();
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m_scenex.clear();
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m_sceney.clear();
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// Convert relative coordinates to absolute pixel coordinates that can be used for drawing
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foreach (QPointF point, m_series->data()) {
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m_scenex.append(m_boundingRect.left() + point.x() * scalex - m_visibleChartArea.m_minX * scalex);
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m_sceney.append(m_boundingRect.bottom() - point.y() * scaley + m_visibleChartArea.m_minY * scaley);
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}
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}
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}
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#include "moc_scatterpresenter_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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