|
|
#include "xychartitem_p.h"
|
|
|
#include "qxyseries.h"
|
|
|
#include "chartpresenter_p.h"
|
|
|
#include <QPainter>
|
|
|
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
//TODO: optimize : remove points which are not visible
|
|
|
|
|
|
XYChartItem::XYChartItem(QXYSeries* series,QGraphicsItem *parent):ChartItem(parent),
|
|
|
m_minX(0),
|
|
|
m_maxX(0),
|
|
|
m_minY(0),
|
|
|
m_maxY(0),
|
|
|
m_series(series)
|
|
|
{
|
|
|
QObject::connect(series,SIGNAL(pointReplaced(int)),this,SLOT(handlePointReplaced(int)));
|
|
|
QObject::connect(series,SIGNAL(pointAdded(int)),this,SLOT(handlePointAdded(int)));
|
|
|
QObject::connect(series,SIGNAL(pointRemoved(int)),this,SLOT(handlePointRemoved(int)));
|
|
|
|
|
|
}
|
|
|
|
|
|
QPointF XYChartItem::calculateGeometryPoint(const QPointF& point) const
|
|
|
{
|
|
|
const qreal deltaX = m_size.width()/(m_maxX-m_minX);
|
|
|
const qreal deltaY = m_size.height()/(m_maxY-m_minY);
|
|
|
qreal x = (point.x() - m_minX)* deltaX;
|
|
|
qreal y = (point.y() - m_minY)*-deltaY + m_size.height();
|
|
|
return QPointF(x,y);
|
|
|
}
|
|
|
|
|
|
|
|
|
QPointF XYChartItem::calculateGeometryPoint(int index) const
|
|
|
{
|
|
|
const qreal deltaX = m_size.width()/(m_maxX-m_minX);
|
|
|
const qreal deltaY = m_size.height()/(m_maxY-m_minY);
|
|
|
qreal x = (m_series->x(index) - m_minX)* deltaX;
|
|
|
qreal y = (m_series->y(index) - m_minY)*-deltaY + m_size.height();
|
|
|
return QPointF(x,y);
|
|
|
}
|
|
|
|
|
|
QVector<QPointF> XYChartItem::calculateGeometryPoints() const
|
|
|
{
|
|
|
const qreal deltaX = m_size.width()/(m_maxX-m_minX);
|
|
|
const qreal deltaY = m_size.height()/(m_maxY-m_minY);
|
|
|
|
|
|
QVector<QPointF> points;
|
|
|
points.reserve(m_series->count());
|
|
|
for (int i = 0; i < m_series->count(); ++i) {
|
|
|
qreal x = (m_series->x(i) - m_minX)* deltaX;
|
|
|
qreal y = (m_series->y(i) - m_minY)*-deltaY + m_size.height();
|
|
|
points << QPointF(x,y);
|
|
|
}
|
|
|
return points;
|
|
|
}
|
|
|
|
|
|
void XYChartItem::updatePoints(QVector<QPointF>& points)
|
|
|
{
|
|
|
setGeometry(points);
|
|
|
}
|
|
|
|
|
|
void XYChartItem::updatePoint(QVector<QPointF>& points)
|
|
|
{
|
|
|
setGeometry(points);
|
|
|
}
|
|
|
|
|
|
void XYChartItem::setGeometry(QVector<QPointF>& points)
|
|
|
{
|
|
|
m_points = points;
|
|
|
}
|
|
|
|
|
|
//handlers
|
|
|
|
|
|
void XYChartItem::handlePointAdded(int index)
|
|
|
{
|
|
|
Q_ASSERT(index<m_series->count());
|
|
|
Q_ASSERT(index>=0);
|
|
|
|
|
|
QPointF point = calculateGeometryPoint(index);
|
|
|
QVector<QPointF> points = m_points;
|
|
|
points.insert(index,point);
|
|
|
updatePoints(points);
|
|
|
update();
|
|
|
}
|
|
|
void XYChartItem::handlePointRemoved(int index)
|
|
|
{
|
|
|
Q_ASSERT(index<m_series->count());
|
|
|
Q_ASSERT(index>=0);
|
|
|
QPointF point = calculateGeometryPoint(index);
|
|
|
QVector<QPointF> points = m_points;
|
|
|
points.remove(index);
|
|
|
updatePoints(points);
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
void XYChartItem::handlePointReplaced(int index)
|
|
|
{
|
|
|
Q_ASSERT(index<m_series->count());
|
|
|
Q_ASSERT(index>=0);
|
|
|
QPointF point = calculateGeometryPoint(index);
|
|
|
QVector<QPointF> points = m_points;
|
|
|
points.replace(index,point);
|
|
|
updatePoint(points);
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
void XYChartItem::handleDomainChanged(qreal minX, qreal maxX, qreal minY, qreal maxY)
|
|
|
{
|
|
|
m_minX=minX;
|
|
|
m_maxX=maxX;
|
|
|
m_minY=minY;
|
|
|
m_maxY=maxY;
|
|
|
|
|
|
if(isEmpty()) return;
|
|
|
QVector<QPointF> points = calculateGeometryPoints();
|
|
|
updatePoints(points);
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
void XYChartItem::handleGeometryChanged(const QRectF& rect)
|
|
|
{
|
|
|
Q_ASSERT(rect.isValid());
|
|
|
m_size=rect.size();
|
|
|
m_clipRect=rect.translated(-rect.topLeft());
|
|
|
setPos(rect.topLeft());
|
|
|
|
|
|
if(isEmpty()) return;
|
|
|
QVector<QPointF> points = calculateGeometryPoints();
|
|
|
updatePoints(points);
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
|
|
|
bool XYChartItem::isEmpty()
|
|
|
{
|
|
|
return !m_clipRect.isValid() || m_maxX - m_minX == 0 || m_maxY - m_minY ==0 ;
|
|
|
}
|
|
|
|
|
|
#include "moc_xychartitem_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
