scatterchartitem.cpp
178 lines
| 4.7 KiB
| text/x-c
|
CppLexer
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r470 | #include "scatterchartitem_p.h" | ||
#include "qscatterseries.h" | ||||
#include "chartpresenter_p.h" | ||||
#include <QPainter> | ||||
#include <QGraphicsScene> | ||||
QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r476 | ScatterChartItem::ScatterChartItem(QScatterSeries *series, QGraphicsItem *parent) : | ||
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r470 | XYChartItem(series,parent), | ||
m_series(series), | ||||
m_items(this), | ||||
m_shape(QScatterSeries::MarkerShapeRectangle), | ||||
m_size(10) | ||||
{ | ||||
Q_ASSERT(parent); | ||||
Q_ASSERT(series); | ||||
connect(m_series,SIGNAL(updated()), this, SLOT(handleUpdated())); | ||||
setZValue(ChartPresenter::ScatterSeriesZValue); | ||||
setFlags(QGraphicsItem::ItemHasNoContents); | ||||
setFlags(QGraphicsItem::ItemClipsChildrenToShape); | ||||
handleUpdated(); | ||||
// TODO: how to draw a drop shadow? | ||||
// QGraphicsDropShadowEffect *dropShadow = new QGraphicsDropShadowEffect(); | ||||
// dropShadow->setOffset(2.0); | ||||
// dropShadow->setBlurRadius(2.0); | ||||
// setGraphicsEffect(dropShadow); | ||||
} | ||||
QRectF ScatterChartItem::boundingRect() const | ||||
{ | ||||
return m_rect; | ||||
} | ||||
void ScatterChartItem::createPoints(int count) | ||||
{ | ||||
for (int i = 0; i < count; ++i) { | ||||
QGraphicsItem *item; | ||||
switch (m_shape) { | ||||
case QScatterSeries::MarkerShapeDefault: | ||||
// Fallthrough, defaults to circle | ||||
case QScatterSeries::MarkerShapeCircle: | ||||
item = new QGraphicsEllipseItem(0,0,m_size,m_size); | ||||
break; | ||||
case QScatterSeries::MarkerShapeRectangle: | ||||
item = new QGraphicsRectItem(0,0,m_size,m_size); | ||||
break; | ||||
case QScatterSeries::MarkerShapeRoundedRectangle: | ||||
//m_path.addRoundedRect(x, y, size, size, size / 4.0, size / 4.0); | ||||
break; | ||||
case QScatterSeries::MarkerShapeTiltedRectangle: | ||||
// TODO: tilt the rectangle | ||||
//m_path.addRect(x, y, size, size); | ||||
//break; | ||||
case QScatterSeries::MarkerShapeTriangle: | ||||
//QPolygonF polygon; | ||||
//polygon << QPointF(0.0, -size) << QPointF(size / 2.0, 0.0) << QPointF(-size / 2, 0.0); | ||||
// TODO: the position is not exactly right... | ||||
//m_path.addPolygon(polygon.translated(x + size / 2.0, y + size)); | ||||
break; | ||||
} | ||||
m_items.addToGroup(item); | ||||
} | ||||
} | ||||
void ScatterChartItem::deletePoints(int count) | ||||
{ | ||||
QList<QGraphicsItem *> items = m_items.childItems(); | ||||
for (int i = 0; i < count; ++i) { | ||||
delete(items.takeLast()); | ||||
} | ||||
} | ||||
/* | ||||
void ScatterChartItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) | ||||
{ | ||||
QPointF clickedPoint( | ||||
m_minX + (event->lastPos().x() / m_clippingRect.width()) * (m_maxX-m_minX), | ||||
m_maxY - (event->lastPos().y() / m_clippingRect.height()) * (m_maxY-m_minY)); | ||||
emit clicked(clickedPoint); | ||||
} | ||||
*/ | ||||
void ScatterChartItem::setGeometry(QVector<QPointF>& points) | ||||
{ | ||||
if(points.size()==0) return; | ||||
int diff = XYChartItem::points().size() - points.size(); | ||||
if(diff>0) { | ||||
deletePoints(diff); | ||||
} | ||||
else if(diff<0) { | ||||
createPoints(-diff); | ||||
} | ||||
if(diff!=0) handleUpdated(); | ||||
QList<QGraphicsItem*> items = m_items.childItems(); | ||||
for(int i=0; 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); | ||||
} | ||||
} | ||||
prepareGeometryChange(); | ||||
m_rect = clipRect(); | ||||
XYChartItem::setGeometry(points); | ||||
} | ||||
void ScatterChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) | ||||
{ | ||||
Q_UNUSED(painter); | ||||
Q_UNUSED(option); | ||||
Q_UNUSED(widget); | ||||
} | ||||
void ScatterChartItem::setPen(const QPen& pen) | ||||
{ | ||||
foreach(QGraphicsItem* item , m_items.childItems()) { | ||||
static_cast<QAbstractGraphicsShapeItem*>(item)->setPen(pen); | ||||
} | ||||
} | ||||
void ScatterChartItem::setBrush(const QBrush& brush) | ||||
{ | ||||
foreach(QGraphicsItem* item , m_items.childItems()) { | ||||
static_cast<QAbstractGraphicsShapeItem*>(item)->setBrush(brush); | ||||
} | ||||
} | ||||
void ScatterChartItem::handleUpdated() | ||||
{ | ||||
int count = m_items.childItems().count(); | ||||
if(count==0) return; | ||||
bool recreate = m_size != m_series->size() || m_shape != m_series->shape(); | ||||
//TODO: only rewrite on size change | ||||
m_size = m_series->size(); | ||||
m_shape = m_series->shape(); | ||||
if(recreate){ | ||||
deletePoints(count); | ||||
createPoints(count); | ||||
} | ||||
setPen(m_series->pen()); | ||||
setBrush(m_series->brush()); | ||||
} | ||||
#include "moc_scatterchartitem_p.cpp" | ||||
QTCOMMERCIALCHART_END_NAMESPACE | ||||