scatterpresenter.cpp
112 lines
| 3.7 KiB
| text/x-c
|
CppLexer
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r194 | #include "scatterpresenter_p.h" | ||
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r158 | #include "qscatterseries.h" | ||
#include <QPen> | ||||
#include <QPainter> | ||||
#include <QGraphicsScene> | ||||
#include <QDebug> | ||||
QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
ScatterPresenter::ScatterPresenter(QScatterSeries *series, QGraphicsObject *parent) : | ||||
ChartItem(parent), | ||||
m_series(series), | ||||
m_boundingRect(), | ||||
//m_markerColor(QColor()), | ||||
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r182 | // m_markerColor(QColor(255, 0, 0)), | ||
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r158 | m_visibleChartArea() | ||
{ | ||||
if (parent) | ||||
m_boundingRect = parent->boundingRect(); | ||||
if (series) { | ||||
connect(series, SIGNAL(changed()), this, SLOT(handleModelChanged())); | ||||
} | ||||
} | ||||
void ScatterPresenter::handleDomainChanged(const Domain& domain) | ||||
{ | ||||
m_visibleChartArea = domain; | ||||
changeGeometry(); | ||||
} | ||||
void ScatterPresenter::handleGeometryChanged(const QRectF& rect) | ||||
{ | ||||
m_boundingRect = rect; | ||||
changeGeometry(); | ||||
} | ||||
void ScatterPresenter::handleModelChanged() | ||||
{ | ||||
// TODO: more fine grained modelChanged signaling | ||||
changeGeometry(); | ||||
} | ||||
void ScatterPresenter::paint(QPainter *painter, const QStyleOptionGraphicsItem */*option*/, QWidget */*widget*/) | ||||
{ | ||||
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r195 | // TODO: Optimization: avoid setting on every paint method call? | ||
// The custom settings in series override those defined by the theme | ||||
if (m_series->markerPen().color().isValid()) { | ||||
painter->setPen(m_series->markerPen()); | ||||
painter->setBrush(m_series->markerBrush()); | ||||
} else { | ||||
painter->setPen(m_markerPen); | ||||
painter->setBrush(m_markerBrush); | ||||
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r158 | } | ||
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r195 | int shape = m_series->markerShape(); | ||
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r158 | for (int i(0); i < m_scenex.count() && i < m_sceney.count(); i++) { | ||
if (scene()->width() > m_scenex.at(i) && scene()->height() > m_sceney.at(i)) | ||||
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r195 | // Paint a shape | ||
switch (shape) { | ||||
case QScatterSeries::MarkerShapeDefault: | ||||
// Fallthrough, defaults to circle | ||||
case QScatterSeries::MarkerShapeCircle: | ||||
painter->drawChord(m_scenex.at(i), m_sceney.at(i), 9, 9, 0, 5760); | ||||
break; | ||||
case QScatterSeries::MarkerShapePoint: | ||||
painter->drawPoint(m_scenex.at(i), m_sceney.at(i)); | ||||
break; | ||||
case QScatterSeries::MarkerShapeRectangle: | ||||
painter->drawRect(m_scenex.at(i), m_sceney.at(i), 9, 9); | ||||
break; | ||||
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r202 | case QScatterSeries::MarkerShapeTiltedRectangle: { | ||
// TODO: | ||||
static const QPointF points[4] = { | ||||
QPointF(-1.0 + m_scenex.at(i), 0.0 + m_sceney.at(i)), | ||||
QPointF(0.0 + m_scenex.at(i), 1.0 + m_sceney.at(i)), | ||||
QPointF(1.0 + m_scenex.at(i), 0.0 + m_sceney.at(i)), | ||||
QPointF(0.0 + m_scenex.at(i), -1.0 + m_sceney.at(i)) | ||||
}; | ||||
painter->drawPolygon(points, 4); | ||||
} | ||||
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r195 | break; | ||
default: | ||||
// TODO: implement the rest of the shapes | ||||
Q_ASSERT(false); | ||||
break; | ||||
} | ||||
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r158 | } | ||
} | ||||
void ScatterPresenter::changeGeometry() | ||||
{ | ||||
if (m_boundingRect.isValid()) { | ||||
prepareGeometryChange(); | ||||
qreal scalex = m_boundingRect.width() / m_visibleChartArea.spanX(); | ||||
qreal scaley = m_boundingRect.height() / m_visibleChartArea.spanY(); | ||||
m_scenex.clear(); | ||||
m_sceney.clear(); | ||||
// Convert relative coordinates to absolute pixel coordinates that can be used for drawing | ||||
foreach (QPointF point, m_series->data()) { | ||||
m_scenex.append(m_boundingRect.left() + point.x() * scalex - m_visibleChartArea.m_minX * scalex); | ||||
m_sceney.append(m_boundingRect.bottom() - point.y() * scaley + m_visibleChartArea.m_minY * scaley); | ||||
} | ||||
} | ||||
} | ||||
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r194 | #include "moc_scatterpresenter_p.cpp" | ||
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r158 | |||
QTCOMMERCIALCHART_END_NAMESPACE | ||||