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/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.io
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**
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****************************************************************************/
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#include <private/xyanimation_p.h>
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#include <private/xychart_p.h>
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#include <QtCore/QDebug>
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Q_DECLARE_METATYPE(QVector<QPointF>)
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QT_CHARTS_BEGIN_NAMESPACE
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XYAnimation::XYAnimation(XYChart *item)
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: ChartAnimation(item),
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m_type(NewAnimation),
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m_dirty(false),
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m_index(-1),
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m_item(item)
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{
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setDuration(ChartAnimationDuration);
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setEasingCurve(QEasingCurve::OutQuart);
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}
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XYAnimation::~XYAnimation()
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{
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}
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void XYAnimation::setup(const QVector<QPointF> &oldPoints, const QVector<QPointF> &newPoints, int index)
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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_oldPoints = oldPoints;
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}
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m_newPoints = newPoints;
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int x = m_oldPoints.count();
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int y = m_newPoints.count();
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int diff = x - y;
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int requestedDiff = oldPoints.count() - y;
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// m_oldPoints can be whatever between 0 and actual points count if new animation setup
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// interrupts a previous animation, so only do remove and add animations if both
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// stored diff and requested diff indicate add or remove. Also ensure that index is not
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// invalid.
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if (diff == 1 && requestedDiff == 1 && index >= 0 && y > 0 && index <= y) {
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//remove point
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m_newPoints.insert(index, index > 0 ? newPoints[index - 1] : newPoints[index]);
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m_index = index;
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m_type = RemovePointAnimation;
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}
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if (diff == -1 && requestedDiff == -1 && index >= 0 && index <= x) {
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//add point
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m_oldPoints.insert(index, index > 0 ? newPoints[index - 1] : newPoints[index]);
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m_index = index;
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m_type = AddPointAnimation;
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}
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x = m_oldPoints.count();
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y = m_newPoints.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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setKeyValueAt(0.0, qVariantFromValue(m_oldPoints));
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setKeyValueAt(1.0, qVariantFromValue(m_newPoints));
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}
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QVariant XYAnimation::interpolated(const QVariant &start, const QVariant &end, qreal progress) const
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{
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QVector<QPointF> startVector = qvariant_cast<QVector<QPointF> >(start);
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QVector<QPointF> endVector = qvariant_cast<QVector<QPointF> >(end);
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QVector<QPointF> result;
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switch (m_type) {
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case ReplacePointAnimation:
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case AddPointAnimation:
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case RemovePointAnimation: {
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if (startVector.count() != endVector.count())
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break;
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for (int i = 0; i < startVector.count(); i++) {
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qreal x = startVector[i].x() + ((endVector[i].x() - startVector[i].x()) * progress);
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qreal y = startVector[i].y() + ((endVector[i].y() - startVector[i].y()) * progress);
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result << 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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for (int i = 0; i < endVector.count() * qBound(qreal(0), progress, qreal(1)); i++)
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result << endVector[i];
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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 XYAnimation::updateCurrentValue(const QVariant &value)
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{
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if (state() != QAbstractAnimation::Stopped) { //workaround
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QVector<QPointF> vector = qvariant_cast<QVector<QPointF> >(value);
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m_item->setGeometryPoints(vector);
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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 XYAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
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{
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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_newPoints.isEmpty())
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m_newPoints.remove(m_index);
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m_item->setGeometryPoints(m_newPoints);
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}
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}
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}
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#include "moc_chartanimation_p.cpp"
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QT_CHARTS_END_NAMESPACE
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