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29
30#include <private/baranimation_p.h>
31#include <private/abstractbarchartitem_p.h>
32
33Q_DECLARE_METATYPE(QVector<QRectF>)
34
35QT_CHARTS_BEGIN_NAMESPACE
36
37BarAnimation::BarAnimation(AbstractBarChartItem *item, int duration, QEasingCurve &curve)
38 : ChartAnimation(item),
39 m_item(item)
40{
41 setDuration(duration);
42 setEasingCurve(curve);
43}
44
45BarAnimation::~BarAnimation()
46{
47}
48
49QVariant BarAnimation::interpolated(const QVariant &from, const QVariant &to, qreal progress) const
50{
51 QVector<QRectF> startVector = qvariant_cast<QVector<QRectF> >(v: from);
52 QVector<QRectF> endVector = qvariant_cast<QVector<QRectF> >(v: to);
53 QVector<QRectF> result;
54
55 Q_ASSERT(startVector.count() == endVector.count());
56
57 for (int i = 0; i < startVector.count(); i++) {
58 QRectF start = startVector[i].normalized();
59 QRectF end = endVector[i].normalized();
60 qreal x1 = start.left() + progress * (end.left() - start.left());
61 qreal x2 = start.right() + progress * (end.right() - start.right());
62 qreal y1 = start.top() + progress * (end.top() - start.top());
63 qreal y2 = start.bottom() + progress * (end.bottom() - start.bottom());
64
65 QRectF value(QPointF(x1, y1), QPointF(x2, y2));
66 result << value.normalized();
67 }
68 return QVariant::fromValue(value: result);
69}
70
71void BarAnimation::updateCurrentValue(const QVariant &value)
72{
73 if (state() != QAbstractAnimation::Stopped) { //workaround
74
75 QVector<QRectF> layout = qvariant_cast<QVector<QRectF> >(v: value);
76 m_item->setLayout(layout);
77 }
78}
79
80void BarAnimation::setup(const QVector<QRectF> &oldLayout, const QVector<QRectF> &newLayout)
81{
82 QVariantAnimation::KeyValues value;
83 setKeyValues(value); //workaround for wrong interpolation call
84 setKeyValueAt(step: 0.0, value: QVariant::fromValue(value: oldLayout));
85 setKeyValueAt(step: 1.0, value: QVariant::fromValue(value: newLayout));
86}
87
88QT_CHARTS_END_NAMESPACE
89
90#include "moc_baranimation_p.cpp"
91

source code of qtcharts/src/charts/animations/baranimation.cpp