qt5base-lts/examples/animation/stickman/animation.cpp

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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** 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
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/
#include "animation.h"
#include <QPointF>
#include <QIODevice>
#include <QDataStream>
class Frame
{
public:
Frame() {
}
int nodeCount() const
{
return m_nodePositions.size();
}
void setNodeCount(int nodeCount)
{
while (nodeCount > m_nodePositions.size())
m_nodePositions.append(QPointF());
while (nodeCount < m_nodePositions.size())
m_nodePositions.removeLast();
}
QPointF nodePos(int idx) const
{
return m_nodePositions.at(idx);
}
void setNodePos(int idx, const QPointF &pos)
{
m_nodePositions[idx] = pos;
}
private:
QList<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);
}
}