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#include "linechartanimationitem_p.h"
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#include "linechartitem_p.h"
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#include <QPropertyAnimation>
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#include <QTimer>
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Q_DECLARE_METATYPE(QVector<QPointF>)
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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const static int duration = 500;
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LineChartAnimationItem::LineChartAnimationItem(QLineSeries* series,QGraphicsItem *parent):
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LineChartItem(series,parent),
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m_animation(new LineChartAnimatator(this,this)),
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m_dirty(false)
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{
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}
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LineChartAnimationItem::~LineChartAnimationItem()
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{
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}
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void LineChartAnimationItem::updatePoints(QVector<QPointF>& newPoints)
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{
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QVector<QPointF> oldPoints = points();
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LineChartItem::updatePoints(newPoints);
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if(newPoints.count()==0) return;
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oldPoints.resize(newPoints.size());
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if(m_animation->state()!=QAbstractAnimation::Stopped){
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m_animation->stop();
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}
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m_animation->setDuration(duration);
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m_animation->setEasingCurve(QEasingCurve::InOutBack);
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m_animation->setKeyValueAt(0.0, qVariantFromValue(oldPoints));
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m_animation->setKeyValueAt(1.0, qVariantFromValue(newPoints));
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QTimer::singleShot(0,m_animation,SLOT(start()));
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m_points = newPoints;
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m_dirty=false;
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}
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void LineChartAnimationItem::updatePoint(int index,QPointF& newPoint)
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{
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if(m_animation->state()!=QAbstractAnimation::Stopped){
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m_animation->stop();
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m_dirty=true;
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}
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if(m_dirty){
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m_points=points();
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m_dirty=false;
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}
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LineChartItem::updatePoint(index,newPoint);
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m_animation->setDuration(duration);
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m_animation->setEasingCurve(QEasingCurve::InOutBack);
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m_animation->setKeyValueAt(0.0, qVariantFromValue(m_points));
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m_animation->setKeyValueAt(1.0, qVariantFromValue( points()));
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QTimer::singleShot(0,this,SLOT(startAnimation()));
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}
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void LineChartAnimationItem::startAnimation()
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{
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m_dirty=true;
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m_animation->start();
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}
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LineChartAnimatator::LineChartAnimatator(LineChartAnimationItem *item , QObject *parent):QVariantAnimation(parent),
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m_item(item)
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{
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}
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LineChartAnimatator::~LineChartAnimatator()
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{
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}
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QVariant LineChartAnimatator::interpolated(const QVariant &start, const QVariant & end, qreal progress ) const
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{
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QVector<QPointF> startVector = qVariantValue<QVector<QPointF> >(start);
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QVector<QPointF> endVecotr = qVariantValue<QVector<QPointF> >(end);
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QVector<QPointF> result;
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Q_ASSERT(startVector.count() == endVecotr.count());
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for(int i =0 ;i< startVector.count();i++){
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qreal x = startVector[i].x() + ((endVecotr[i].x()- startVector[i].x()) * progress);//qBound(0.0, progress, 1.0));
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qreal y = startVector[i].y() + ((endVecotr[i].y()- startVector[i].y()) * progress);//qBound(0.0, progress, 1.0));
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result << QPointF(x,y);
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}
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return qVariantFromValue(result);
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}
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void LineChartAnimatator::updateCurrentValue (const QVariant & value )
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{
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QVector<QPointF> vector = qVariantValue<QVector<QPointF> >(value);
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if(state()!=QAbstractAnimation::Stopped){ //workaround
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m_item->setGeometry(vector);
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}
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}
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#include "moc_linechartanimationitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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