animation.cpp Example File

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#include "animation.h"
#include <QPointF>
#include <QVector>
#include <QIODevice>
#include <QDataStream>
class Frame
{
public:
    Frame() {
    }
    int nodeCount() const
    {
        return m_nodePositions.size();
    }
    void setNodeCount(int nodeCount)
    {
        m_nodePositions.resize(nodeCount);
    }
    QPointF nodePos(int idx) const
    {
        return m_nodePositions.at(idx);
    }
    void setNodePos(int idx, const QPointF &pos)
    {
        m_nodePositions[idx] = pos;
    }
private:
    QVector<QPointF> m_nodePositions;
};
Animation::Animation()
{
    m_currentFrame = 0;
    m_frames.append(new Frame);
}
Animation::~Animation()
{
    qDeleteAll(m_frames);
}
void Animation::setTotalFrames(int totalFrames)
{
    while (m_frames.size() < totalFrames)
        m_frames.append(new Frame);
    while (totalFrames < m_frames.size())
        delete m_frames.takeLast();
}
int Animation::totalFrames() const
{
    return m_frames.size();
}
void Animation::setCurrentFrame(int currentFrame)
{
    m_currentFrame = qMax(qMin(currentFrame, totalFrames()-1), 0);
}
int Animation::currentFrame() const
{
    return m_currentFrame;
}
void Animation::setNodeCount(int nodeCount)
{
    Frame *frame = m_frames.at(m_currentFrame);
    frame->setNodeCount(nodeCount);
}
int Animation::nodeCount() const
{
    Frame *frame = m_frames.at(m_currentFrame);
    return frame->nodeCount();
}
void Animation::setNodePos(int idx, const QPointF &pos)
{
    Frame *frame = m_frames.at(m_currentFrame);
    frame->setNodePos(idx, pos);
}
QPointF Animation::nodePos(int idx) const
{
    Frame *frame = m_frames.at(m_currentFrame);
    return frame->nodePos(idx);
}
QString Animation::name() const
{
    return m_name;
}
void Animation::setName(const QString &name)
{
    m_name = name;
}
void Animation::save(QIODevice *device) const
{
    QDataStream stream(device);
    stream << m_name;
    stream << m_frames.size();
    foreach (Frame *frame, m_frames) {
        stream << frame->nodeCount();
        for (int i=0; i<frame->nodeCount(); ++i)
            stream << frame->nodePos(i);
    }
}
void Animation::load(QIODevice *device)
{
    if (!m_frames.isEmpty())
        qDeleteAll(m_frames);
    m_frames.clear();
    QDataStream stream(device);
    stream >> m_name;
    int frameCount;
    stream >> frameCount;
    for (int i=0; i<frameCount; ++i) {
        int nodeCount;
        stream >> nodeCount;
        Frame *frame = new Frame;
        frame->setNodeCount(nodeCount);
        for (int j=0; j<nodeCount; ++j) {
            QPointF pos;
            stream >> pos;
            frame->setNodePos(j, pos);
        }
        m_frames.append(frame);
    }
}