|
|
#include "linechartitem_p.h"
|
|
|
#include "qlineseries.h"
|
|
|
#include "chartpresenter_p.h"
|
|
|
#include <QPainter>
|
|
|
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
//TODO: optimize : remove points which are not visible
|
|
|
|
|
|
LineChartItem::LineChartItem(ChartPresenter* presenter, QLineSeries* series,QGraphicsItem *parent):ChartItem(parent),
|
|
|
m_presenter(presenter),
|
|
|
m_series(series),
|
|
|
m_items(this)
|
|
|
{
|
|
|
//m_items.setZValue(ChartPresenter::LineChartZValue);
|
|
|
setZValue(ChartPresenter::LineChartZValue);
|
|
|
}
|
|
|
|
|
|
QRectF LineChartItem::boundingRect() const
|
|
|
{
|
|
|
return m_rect;
|
|
|
}
|
|
|
|
|
|
QPainterPath LineChartItem::shape() const
|
|
|
{
|
|
|
return m_path;
|
|
|
}
|
|
|
|
|
|
void LineChartItem::createPoints(int count)
|
|
|
{
|
|
|
for (int i = 0; i < count; ++i) {
|
|
|
QGraphicsRectItem* item = new QGraphicsRectItem(0,0,3,3);
|
|
|
m_items.addToGroup(item);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void LineChartItem::clearPoints(int count)
|
|
|
{
|
|
|
QList<QGraphicsItem *> items = m_items.childItems();
|
|
|
|
|
|
for (int i = 0; i < count; ++i) {
|
|
|
delete(items.takeLast());
|
|
|
}
|
|
|
}
|
|
|
|
|
|
QPointF LineChartItem::calculateGeometryPoint(int index) const
|
|
|
{
|
|
|
const qreal deltaX = m_size.width()/m_domain.spanX();
|
|
|
const qreal deltaY = m_size.height()/m_domain.spanY();
|
|
|
qreal x = (m_series->x(index) - m_domain.m_minX)* deltaX;
|
|
|
qreal y = (m_series->y(index) - m_domain.m_minY)*-deltaY + m_size.height();
|
|
|
return QPointF(x,y);
|
|
|
}
|
|
|
|
|
|
QVector<QPointF> LineChartItem::calculateGeometryPoints() const
|
|
|
{
|
|
|
const qreal deltaX = m_size.width()/m_domain.spanX();
|
|
|
const qreal deltaY = m_size.height()/m_domain.spanY();
|
|
|
|
|
|
QVector<QPointF> points;
|
|
|
points.reserve(m_series->count());
|
|
|
for (int i = 0; i < m_series->count(); ++i) {
|
|
|
qreal x = (m_series->x(i) - m_domain.m_minX)* deltaX;
|
|
|
qreal y = (m_series->y(i) - m_domain.m_minY)*-deltaY + m_size.height();
|
|
|
points << QPointF(x,y);
|
|
|
}
|
|
|
return points;
|
|
|
}
|
|
|
|
|
|
void LineChartItem::updateItem(QVector<QPointF>& oldPoints,QVector<QPointF>& newPoints)
|
|
|
{
|
|
|
applyGeometry(newPoints);
|
|
|
oldPoints = newPoints;
|
|
|
}
|
|
|
|
|
|
void LineChartItem::updateItem(QVector<QPointF>& oldPoints,int index,QPointF& newPoint)
|
|
|
{
|
|
|
oldPoints.replace(index,newPoint);
|
|
|
applyGeometry(oldPoints);
|
|
|
}
|
|
|
|
|
|
void LineChartItem::applyGeometry(QVector<QPointF>& points)
|
|
|
{
|
|
|
if(points.size()==0) return;
|
|
|
|
|
|
QList<QGraphicsItem*> items = m_items.childItems();
|
|
|
|
|
|
QPainterPath path;
|
|
|
const QPointF& point = points.at(0);
|
|
|
path.moveTo(point);
|
|
|
QGraphicsItem* item = items.at(0);
|
|
|
item->setPos(point.x()-1,point.y()-1);
|
|
|
if(!m_clipRect.contains(point)) item->setVisible(false);
|
|
|
|
|
|
for(int i=1 ; i< points.size();i++) {
|
|
|
QGraphicsItem* item = items.at(i);
|
|
|
const QPointF& point = points.at(i);
|
|
|
item->setPos(point.x()-1,point.y()-1);
|
|
|
if(!m_clipRect.contains(point)) item->setVisible(false);
|
|
|
path.lineTo(point);
|
|
|
}
|
|
|
|
|
|
prepareGeometryChange();
|
|
|
m_path = path;
|
|
|
m_rect = path.boundingRect();
|
|
|
}
|
|
|
|
|
|
void LineChartItem::setPen(const QPen& pen)
|
|
|
{
|
|
|
m_pen = pen;
|
|
|
}
|
|
|
|
|
|
//handlers
|
|
|
|
|
|
void LineChartItem::handlePointAdded(int index)
|
|
|
{
|
|
|
Q_ASSERT(index<m_series->count());
|
|
|
Q_ASSERT(index>=0);
|
|
|
|
|
|
QPointF point = calculateGeometryPoint(index);
|
|
|
createPoints(1);
|
|
|
QVector<QPointF> points = m_points;
|
|
|
points.insert(index,point);
|
|
|
updateItem(m_points,points);
|
|
|
update();
|
|
|
}
|
|
|
void LineChartItem::handlePointRemoved(int index)
|
|
|
{
|
|
|
Q_ASSERT(index<m_series->count());
|
|
|
Q_ASSERT(index>=0);
|
|
|
QPointF point = calculateGeometryPoint(index);
|
|
|
clearPoints(1);
|
|
|
QVector<QPointF> points = m_points;
|
|
|
points.remove(index);
|
|
|
updateItem(m_points,points);
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
void LineChartItem::handlePointReplaced(int index)
|
|
|
{
|
|
|
Q_ASSERT(index<m_series->count());
|
|
|
Q_ASSERT(index>=0);
|
|
|
QPointF point = calculateGeometryPoint(index);
|
|
|
updateItem(m_points,index,point);
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
void LineChartItem::handleDomainChanged(const Domain& domain)
|
|
|
{
|
|
|
|
|
|
m_domain = domain;
|
|
|
|
|
|
if(m_domain.isEmpty()) return;
|
|
|
if(!m_clipRect.isValid()) return;
|
|
|
|
|
|
QVector<QPointF> points = calculateGeometryPoints();
|
|
|
|
|
|
int diff = m_points.size() - points.size();
|
|
|
|
|
|
if(diff>0) {
|
|
|
clearPoints(diff);
|
|
|
}
|
|
|
else if(diff<0) {
|
|
|
createPoints(-diff);
|
|
|
}
|
|
|
|
|
|
updateItem(m_points,points);
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
void LineChartItem::handleGeometryChanged(const QRectF& rect)
|
|
|
{
|
|
|
Q_ASSERT(rect.isValid());
|
|
|
m_size=rect.size();
|
|
|
m_clipRect=rect.translated(-rect.topLeft());
|
|
|
setPos(rect.topLeft());
|
|
|
|
|
|
if(m_domain.isEmpty()) return;
|
|
|
|
|
|
QVector<QPointF> points = calculateGeometryPoints();
|
|
|
|
|
|
int diff = m_points.size() - points.size();
|
|
|
|
|
|
if(diff>0) {
|
|
|
clearPoints(diff);
|
|
|
}
|
|
|
else if(diff<0) {
|
|
|
createPoints(-diff);
|
|
|
}
|
|
|
|
|
|
updateItem(m_points,points);
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
void LineChartItem::handleUpdated()
|
|
|
{
|
|
|
m_items.setVisible(m_series->pointsVisible());
|
|
|
setPen(m_series->pen());
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
//painter
|
|
|
|
|
|
void LineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
|
|
|
{
|
|
|
Q_UNUSED(widget);
|
|
|
Q_UNUSED(option);
|
|
|
painter->save();
|
|
|
painter->setPen(m_pen);
|
|
|
painter->setClipRect(m_clipRect);
|
|
|
painter->drawPath(m_path);
|
|
|
painter->restore();
|
|
|
}
|
|
|
|
|
|
|
|
|
#include "moc_linechartitem_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
