Qt 5.11 | Qt Widgets | Stickman Example | animation.cpp Example File

Qt 5.11.3 Reference Documentation

# animation.cpp Example File

animation/stickman/animation.cpp

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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);
          }
      }