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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <private/splineanimation_p.h>
#include <private/splinechartitem_p.h>
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
SplineAnimation::SplineAnimation(SplineChartItem *item, int duration, QEasingCurve &curve)
: XYAnimation(item, duration, curve),
m_item(item),
m_valid(false)
{
}
SplineAnimation::~SplineAnimation()
{
}
void SplineAnimation::setup(const QList<QPointF> &oldPoints, const QList<QPointF> &newPoints,
const QList<QPointF> &oldControlPoints,
const QList<QPointF> &newControlPoints, int index)
{
if (newPoints.size() * 2 - 2 != newControlPoints.size() || newControlPoints.size() < 2) {
m_valid = false;
m_dirty = false;
m_item->setGeometryPoints(newPoints);
m_item->setControlGeometryPoints(newControlPoints);
m_item->setDirty(false);
m_item->updateGeometry();
return;
}
m_type = NewAnimation;
if (state() != QAbstractAnimation::Stopped) {
stop();
m_dirty = false;
}
if (!m_dirty) {
m_dirty = true;
m_oldSpline.first = oldPoints;
m_oldSpline.second = oldControlPoints;
}
m_newSpline.first = newPoints;
m_newSpline.second = newControlPoints;
int x = m_oldSpline.first.size();
int y = m_newSpline.first.size();
if (x - y == 1 && index >= 0 && y > 0) {
//remove point
if (index > 0) {
m_newSpline.first.insert(index, newPoints[index - 1]);
m_newSpline.second.insert((index - 1) * 2, newPoints[index - 1]);
m_newSpline.second.insert((index - 1) * 2 + 1, newPoints[index - 1]);
} else {
m_newSpline.first.insert(0, newPoints[index]);
m_newSpline.second.insert(0, newPoints[index]);
m_newSpline.second.insert(1, newPoints[index]);
}
m_index = index;
m_type = RemovePointAnimation;
}
if (x - y == -1 && index >= 0) {
//add point
if (index > 0) {
m_oldSpline.first.insert(index, newPoints[index - 1]);
m_oldSpline.second.insert((index - 1) * 2, newPoints[index - 1]);
m_oldSpline.second.insert((index - 1) * 2 + 1, newPoints[index - 1]);
} else {
m_oldSpline.first.insert(0, newPoints[index]);
m_oldSpline.second.insert(0, newPoints[index]);
m_oldSpline.second.insert(1, newPoints[index]);
}
m_index = index;
m_type = AddPointAnimation;
}
x = m_oldSpline.first.size();
y = m_newSpline.first.size();
if (x != y) {
m_type = NewAnimation;
} else if (m_type == NewAnimation) {
m_type = ReplacePointAnimation;
}
setKeyValueAt(0.0, QVariant::fromValue(m_oldSpline));
setKeyValueAt(1.0, QVariant::fromValue(m_newSpline));
m_valid = true;
}
QVariant SplineAnimation::interpolated(const QVariant &start, const QVariant &end, qreal progress) const
{
SplineVector startPair = qvariant_cast< SplineVector >(start);
SplineVector endPair = qvariant_cast< SplineVector >(end);
SplineVector result;
switch (animationType()) {
case RemovePointAnimation:
case AddPointAnimation:
case ReplacePointAnimation: {
if (startPair.first.size() != endPair.first.size())
break;
Q_ASSERT(startPair.first.size() * 2 - 2 == startPair.second.size());
Q_ASSERT(endPair.first.size() * 2 - 2 == endPair.second.size());
for (int i = 0; i < endPair.first.size(); i++) {
qreal x = startPair.first[i].x() + ((endPair.first[i].x() - startPair.first[i].x()) * progress);
qreal y = startPair.first[i].y() + ((endPair.first[i].y() - startPair.first[i].y()) * progress);
result.first << QPointF(x, y);
if (i + 1 >= endPair.first.size())
continue;
x = startPair.second[i * 2].x() + ((endPair.second[i * 2].x() - startPair.second[i * 2].x()) * progress);
y = startPair.second[i * 2].y() + ((endPair.second[i * 2].y() - startPair.second[i * 2].y()) * progress);
result.second << QPointF(x, y);
x = startPair.second[i * 2 + 1].x() + ((endPair.second[i * 2 + 1].x() - startPair.second[i * 2 + 1].x()) * progress);
y = startPair.second[i * 2 + 1].y() + ((endPair.second[i * 2 + 1].y() - startPair.second[i * 2 + 1].y()) * progress);
result.second << QPointF(x, y);
}
}
break;
case NewAnimation: {
Q_ASSERT(endPair.first.size() * 2 - 2 == endPair.second.size());
int count = endPair.first.size() * qBound(qreal(0), progress, qreal(1));
for (int i = 0; i < count; i++) {
result.first << endPair.first[i];
if (i + 1 == count)
break;
result.second << endPair.second[2 * i];
result.second << endPair.second[2 * i + 1];
}
}
break;
default:
qWarning() << "Unknown type of animation";
break;
}
return QVariant::fromValue(result);
}
void SplineAnimation::updateCurrentValue(const QVariant &value)
{
if (state() != QAbstractAnimation::Stopped && m_valid) { //workaround
const auto pair = qvariant_cast<QPair<QList<QPointF>, QList<QPointF>>>(value);
m_item->setGeometryPoints(pair.first);
m_item->setControlGeometryPoints(pair.second);
m_item->updateGeometry();
m_item->setDirty(true);
m_dirty = false;
}
}
void SplineAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
{
XYAnimation::updateState(newState, oldState);
if (oldState == QAbstractAnimation::Running && newState == QAbstractAnimation::Stopped) {
if (m_item->isDirty() && m_type == RemovePointAnimation) {
if (!m_newSpline.first.isEmpty()) {
if (m_index) {
m_newSpline.first.remove(m_index);
m_newSpline.second.remove((m_index - 1) * 2);
m_newSpline.second.remove((m_index - 1) * 2);
} else {
m_newSpline.first.remove(0);
m_newSpline.second.remove(0);
m_newSpline.second.remove(0);
}
}
m_item->setGeometryPoints(m_newSpline.first);
m_item->setControlGeometryPoints(m_newSpline.second);
}
}
if (oldState == QAbstractAnimation::Stopped && newState == QAbstractAnimation::Running) {
if (!m_valid)
stop();
}
}
QT_END_NAMESPACE