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/****************************************************************************
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**
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** Copyright (C) 2012 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.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt 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 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.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "piesliceanimation_p.h"
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#include "piechartitem_p.h"
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#include "qpieslice.h"
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Q_DECLARE_METATYPE(QTCOMMERCIALCHART_NAMESPACE::PieSliceData)
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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qreal linearPos(qreal start, qreal end, qreal pos)
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{
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return start + ((end - start) * pos);
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}
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QPointF linearPos(QPointF start, QPointF end, qreal pos)
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{
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qreal x = linearPos(start.x(), end.x(), pos);
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qreal y = linearPos(start.y(), end.y(), pos);
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return QPointF(x, y);
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}
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QPen linearPos(QPen start, QPen end, qreal pos)
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{
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QColor c;
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c.setRedF(linearPos(start.color().redF(), end.color().redF(), pos));
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c.setGreenF(linearPos(start.color().greenF(), end.color().greenF(), pos));
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c.setBlueF(linearPos(start.color().blueF(), end.color().blueF(), pos));
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end.setColor(c);
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return end;
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}
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QBrush linearPos(QBrush start, QBrush end, qreal pos)
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{
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QColor c;
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c.setRedF(linearPos(start.color().redF(), end.color().redF(), pos));
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c.setGreenF(linearPos(start.color().greenF(), end.color().greenF(), pos));
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c.setBlueF(linearPos(start.color().blueF(), end.color().blueF(), pos));
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end.setColor(c);
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return end;
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}
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PieSliceAnimation::PieSliceAnimation(PieChartItem *item, QPieSlice *slice)
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:QVariantAnimation(item),
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m_item(item),
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m_slice(slice)
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{
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}
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PieSliceAnimation::~PieSliceAnimation()
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{
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}
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void PieSliceAnimation::setValue(const PieSliceData &startValue, const PieSliceData &endValue)
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{
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if (state() != QAbstractAnimation::Stopped)
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stop();
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m_currentValue = startValue;
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setKeyValueAt(0.0, qVariantFromValue(startValue));
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setKeyValueAt(1.0, qVariantFromValue(endValue));
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}
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void PieSliceAnimation::updateValue(const PieSliceData &endValue)
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{
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if (state() != QAbstractAnimation::Stopped)
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stop();
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setKeyValueAt(0.0, qVariantFromValue(m_currentValue));
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setKeyValueAt(1.0, qVariantFromValue(endValue));
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}
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PieSliceData PieSliceAnimation::currentSliceValue()
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{
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// NOTE:
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// We must use an internal current value because QVariantAnimation::currentValue() is updated
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// before the animation is actually started. So if we get 2 updateValue() calls in a row the currentValue()
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// will have the end value set from the first call and the second call will interpolate that instead of
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// the original current value as it was before the first call.
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return m_currentValue;
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}
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QVariant PieSliceAnimation::interpolated(const QVariant &start, const QVariant &end, qreal progress) const
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{
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PieSliceData startValue = qVariantValue<PieSliceData>(start);
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PieSliceData endValue = qVariantValue<PieSliceData>(end);
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PieSliceData result;
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result = endValue;
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result.m_center = linearPos(startValue.m_center, endValue.m_center, progress);
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result.m_radius = linearPos(startValue.m_radius, endValue.m_radius, progress);
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result.m_startAngle = linearPos(startValue.m_startAngle, endValue.m_startAngle, progress);
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result.m_angleSpan = linearPos(startValue.m_angleSpan, endValue.m_angleSpan, progress);
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result.m_slicePen = linearPos(startValue.m_slicePen, endValue.m_slicePen, progress);
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result.m_sliceBrush = linearPos(startValue.m_sliceBrush, endValue.m_sliceBrush, progress);
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return qVariantFromValue(result);
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}
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void PieSliceAnimation::updateCurrentValue(const QVariant &value)
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{
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if (state() != QAbstractAnimation::Stopped) { //workaround
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m_currentValue = qVariantValue<PieSliceData>(value);
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m_item->setLayout(m_slice, m_currentValue);
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}
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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