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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ #include <private/xyanimation_p.h>
++ #include <private/xychart_p.h>
++ #include <QtCore/QDebug>
++
++
++ QT_BEGIN_NAMESPACE
++
++ XYAnimation::XYAnimation(XYChart *item, int duration, QEasingCurve &curve)
++ : ChartAnimation(item),
++ m_type(NewAnimation),
++ m_dirty(false),
++ m_index(-1),
++ m_item(item)
++ {
++ setDuration(duration);
++ setEasingCurve(curve);
++ }
++
++ XYAnimation::~XYAnimation()
++ {
++ }
++
++ void XYAnimation::setup(const QList<QPointF> &oldPoints, const QList<QPointF> &newPoints, int index)
++ {
++ m_type = NewAnimation;
++
++ if (state() != QAbstractAnimation::Stopped) {
++ stop();
++ m_dirty = false;
++ }
++
++ if (!m_dirty) {
++ m_dirty = true;
++ m_oldPoints = oldPoints;
++ }
++
++ m_newPoints = newPoints;
++
++ int x = m_oldPoints.size();
++ int y = m_newPoints.size();
++ int diff = x - y;
++ int requestedDiff = oldPoints.size() - y;
++
++ // m_oldPoints can be whatever between 0 and actual points count if new animation setup
++ // interrupts a previous animation, so only do remove and add animations if both
++ // stored diff and requested diff indicate add or remove. Also ensure that index is not
++ // invalid.
++ if (diff == 1 && requestedDiff == 1 && index >= 0 && y > 0 && index <= y) {
++ //remove point
++ m_newPoints.insert(index, index > 0 ? newPoints[index - 1] : newPoints[index]);
++ m_index = index;
++ m_type = RemovePointAnimation;
++ }
++
++ if (diff == -1 && requestedDiff == -1 && index >= 0 && index <= x) {
++ //add point
++ m_oldPoints.insert(index, index > 0 ? newPoints[index - 1] : newPoints[index]);
++ m_index = index;
++ m_type = AddPointAnimation;
++ }
++
++ x = m_oldPoints.size();
++ y = m_newPoints.size();
++
++ if (x != y)
++ m_type = NewAnimation;
++ else if (m_type == NewAnimation)
++ m_type = ReplacePointAnimation;
++
++ setKeyValueAt(0.0, QVariant::fromValue(m_oldPoints));
++ setKeyValueAt(1.0, QVariant::fromValue(m_newPoints));
++ }
++
++ QVariant XYAnimation::interpolated(const QVariant &start, const QVariant &end, qreal progress) const
++ {
++ const auto startList = qvariant_cast<QList<QPointF>>(start);
++ const auto endList = qvariant_cast<QList<QPointF>>(end);
++ QList<QPointF> result;
++
++ switch (m_type) {
++
++ case ReplacePointAnimation:
++ case AddPointAnimation:
++ case RemovePointAnimation: {
++ if (startList.size() != endList.size())
++ break;
++
++ for (int i = 0; i < startList.size(); i++) {
++ qreal x = startList[i].x() + ((endList[i].x() - startList[i].x()) * progress);
++ qreal y = startList[i].y() + ((endList[i].y() - startList[i].y()) * progress);
++ result << QPointF(x, y);
++ }
++
++ }
++ break;
++ case NewAnimation: {
++ for (int i = 0; i < endList.size() * qBound(qreal(0), progress, qreal(1)); i++)
++ result << endList[i];
++ }
++ break;
++ default:
++ qWarning() << "Unknown type of animation";
++ break;
++ }
++
++ return QVariant::fromValue(result);
++ }
++
++ void XYAnimation::updateCurrentValue(const QVariant &value)
++ {
++ if (state() != QAbstractAnimation::Stopped) { //workaround
++
++ const auto list = qvariant_cast<QList<QPointF>>(value);
++ m_item->setGeometryPoints(list);
++ m_item->updateGeometry();
++ m_item->setDirty(true);
++ m_dirty = false;
++
++ }
++ }
++
++ void XYAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
++ {
++ if (oldState == QAbstractAnimation::Running && newState == QAbstractAnimation::Stopped) {
++ if (m_item->isDirty() && m_type == RemovePointAnimation) {
++ if (!m_newPoints.isEmpty())
++ m_newPoints.remove(m_index);
++ m_item->setGeometryPoints(m_newPoints);
++ }
++ }
++ }
++
++ QT_END_NAMESPACE
++
++ #include "moc_chartanimation_p.cpp"