- Qt 5.5
- Qt Widgets
- Stickman Example
- animation.cpp Example File
- Qt 5.5.1 Reference Documentation

# animation.cpp Example File

animation/stickman/animation.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the QtCore module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
    ** met:
    **   * Redistributions of source code must retain the above copyright
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    **     notice, this list of conditions and the following disclaimer in
    **     the documentation and/or other materials provided with the
    **     distribution.
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    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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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);
        }
    }