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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Charts module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 or (at your option) any later version
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** approved by the KDE Free Qt Foundation. The licenses are as published by
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <private/splineanimation_p.h>
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#include <private/splinechartitem_p.h>
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#include <QtCore/QDebug>
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Q_DECLARE_METATYPE(QVector<QPointF>)
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Q_DECLARE_METATYPE(SplineVector)
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QT_CHARTS_BEGIN_NAMESPACE
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SplineAnimation::SplineAnimation(SplineChartItem *item, int duration, QEasingCurve &curve)
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: XYAnimation(item, duration, curve),
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m_item(item),
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m_valid(false)
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{
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}
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SplineAnimation::~SplineAnimation()
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{
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}
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void SplineAnimation::setup(QVector<QPointF> &oldPoints, QVector<QPointF> &newPoints, QVector<QPointF> &oldControlPoints, QVector<QPointF> &newControlPoints, int index)
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{
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if (newPoints.count() * 2 - 2 != newControlPoints.count() || newControlPoints.count() < 2) {
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m_valid = false;
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m_dirty = false;
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m_item->setGeometryPoints(newPoints);
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m_item->setControlGeometryPoints(newControlPoints);
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m_item->setDirty(false);
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m_item->updateGeometry();
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return;
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}
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m_type = NewAnimation;
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if (state() != QAbstractAnimation::Stopped) {
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stop();
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m_dirty = false;
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}
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if (!m_dirty) {
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m_dirty = true;
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m_oldSpline.first = oldPoints;
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m_oldSpline.second = oldControlPoints;
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}
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m_newSpline.first = newPoints;
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m_newSpline.second = newControlPoints;
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int x = m_oldSpline.first.count();
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int y = m_newSpline.first.count();
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if (x - y == 1 && index >= 0 && y > 0) {
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//remove point
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if (index > 0) {
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m_newSpline.first.insert(index, newPoints[index - 1]);
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m_newSpline.second.insert((index - 1) * 2, newPoints[index - 1]);
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m_newSpline.second.insert((index - 1) * 2 + 1, newPoints[index - 1]);
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} else {
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m_newSpline.first.insert(0, newPoints[index]);
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m_newSpline.second.insert(0, newPoints[index]);
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m_newSpline.second.insert(1, newPoints[index]);
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}
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m_index = index;
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m_type = RemovePointAnimation;
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}
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if (x - y == -1 && index >= 0) {
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//add point
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if (index > 0) {
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m_oldSpline.first.insert(index, newPoints[index - 1]);
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m_oldSpline.second.insert((index - 1) * 2, newPoints[index - 1]);
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m_oldSpline.second.insert((index - 1) * 2 + 1, newPoints[index - 1]);
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} else {
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m_oldSpline.first.insert(0, newPoints[index]);
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m_oldSpline.second.insert(0, newPoints[index]);
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m_oldSpline.second.insert(1, newPoints[index]);
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}
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m_index = index;
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m_type = AddPointAnimation;
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}
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x = m_oldSpline.first.count();
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y = m_newSpline.first.count();
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if (x != y) {
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m_type = NewAnimation;
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} else if (m_type == NewAnimation) {
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m_type = ReplacePointAnimation;
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}
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setKeyValueAt(0.0, qVariantFromValue(m_oldSpline));
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setKeyValueAt(1.0, qVariantFromValue(m_newSpline));
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m_valid = true;
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}
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QVariant SplineAnimation::interpolated(const QVariant &start, const QVariant &end, qreal progress) const
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{
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SplineVector startPair = qvariant_cast< SplineVector >(start);
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SplineVector endPair = qvariant_cast< SplineVector >(end);
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SplineVector result;
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switch (animationType()) {
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case RemovePointAnimation:
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case AddPointAnimation:
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case ReplacePointAnimation: {
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if (startPair.first.count() != endPair.first.count())
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break;
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Q_ASSERT(startPair.first.count() * 2 - 2 == startPair.second.count());
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Q_ASSERT(endPair.first.count() * 2 - 2 == endPair.second.count());
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for (int i = 0; i < endPair.first.count(); i++) {
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qreal x = startPair.first[i].x() + ((endPair.first[i].x() - startPair.first[i].x()) * progress);
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qreal y = startPair.first[i].y() + ((endPair.first[i].y() - startPair.first[i].y()) * progress);
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result.first << QPointF(x, y);
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if (i + 1 >= endPair.first.count())
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continue;
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x = startPair.second[i * 2].x() + ((endPair.second[i * 2].x() - startPair.second[i * 2].x()) * progress);
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y = startPair.second[i * 2].y() + ((endPair.second[i * 2].y() - startPair.second[i * 2].y()) * progress);
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result.second << QPointF(x, y);
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x = startPair.second[i * 2 + 1].x() + ((endPair.second[i * 2 + 1].x() - startPair.second[i * 2 + 1].x()) * progress);
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y = startPair.second[i * 2 + 1].y() + ((endPair.second[i * 2 + 1].y() - startPair.second[i * 2 + 1].y()) * progress);
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result.second << QPointF(x, y);
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}
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}
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break;
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case NewAnimation: {
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Q_ASSERT(endPair.first.count() * 2 - 2 == endPair.second.count());
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int count = endPair.first.count() * qBound(qreal(0), progress, qreal(1));
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for (int i = 0; i < count; i++) {
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result.first << endPair.first[i];
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if (i + 1 == count)
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break;
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result.second << endPair.second[2 * i];
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result.second << endPair.second[2 * i + 1];
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}
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}
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break;
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default:
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qWarning() << "Unknown type of animation";
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break;
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}
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return qVariantFromValue(result);
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}
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void SplineAnimation::updateCurrentValue(const QVariant &value)
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{
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if (state() != QAbstractAnimation::Stopped && m_valid) { //workaround
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QPair<QVector<QPointF >, QVector<QPointF > > pair = qvariant_cast< QPair< QVector<QPointF>, QVector<QPointF> > >(value);
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m_item->setGeometryPoints(pair.first);
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m_item->setControlGeometryPoints(pair.second);
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m_item->updateGeometry();
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m_item->setDirty(true);
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m_dirty = false;
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}
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}
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void SplineAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
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{
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XYAnimation::updateState(newState, oldState);
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if (oldState == QAbstractAnimation::Running && newState == QAbstractAnimation::Stopped) {
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if (m_item->isDirty() && m_type == RemovePointAnimation) {
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if (!m_newSpline.first.isEmpty()) {
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if (m_index) {
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m_newSpline.first.remove(m_index);
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m_newSpline.second.remove((m_index - 1) * 2);
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m_newSpline.second.remove((m_index - 1) * 2);
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} else {
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m_newSpline.first.remove(0);
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m_newSpline.second.remove(0);
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m_newSpline.second.remove(0);
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}
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}
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m_item->setGeometryPoints(m_newSpline.first);
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m_item->setControlGeometryPoints(m_newSpline.second);
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}
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}
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if (oldState == QAbstractAnimation::Stopped && newState == QAbstractAnimation::Running) {
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if (!m_valid)
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stop();
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}
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}
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QT_CHARTS_END_NAMESPACE
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