ImageReader.h

#ifndef ImageReader_H
#define ImageReader_H
 
#include <QObject>
 
#include <QPointer>
 
// This is the parent of the inner class
#include <functional>
 
// We're using an internal enum for actions()
#include "ImageDisplayProperties.h"
// This is in a signal
#include "ImageList.h"
// This is inlined in the templated read()
#include "ProgressBar.h"
// This is in a slot
#include "PvlObject.h"
 
template <typename A> class QFutureWatcher;
class QMutex;
class QProgressBar;
class QVariant;
 
namespace Isis {
  class PvlObject;

  class ImageReader : public QObject {
      Q_OBJECT
 
    public:
      ImageReader(QMutex *cameraMutex, bool requireFootprints = true, QObject *parent = NULL);
      virtual ~ImageReader();
 
      QList<QAction *> actions(ImageDisplayProperties::Property relevantDispProperties);
      QProgressBar *progress();
 
      void setQtVersion(int qtVersion);
 
    signals:
      void imagesReady(ImageList images);
 
    public slots:
      void askDefaultAlpha();
      void read(PvlObject imagesObj);
      void read(QStringList imageFileNames);
      void setOpenFilled(bool openFilled);
      void setSafeFileOpen(bool safeFileOpen);
 
    private slots:
      void imageReady(int);
      void mappedFinished();
      //void setSmallNumberOfOpenImages(bool useSmallNumber);
 
    private:
      Q_DISABLE_COPY(ImageReader)
 
      template <typename Iterator>
      void read(Iterator begin, Iterator end) {
        int numNewEntries = 0;
        while (begin != end) {
          m_backlog.append(QVariant::fromValue(*begin));
          numNewEntries++;
          begin++;
        }
 
        m_progress->setRange(0, m_progress->maximum() + numNewEntries);
 
        start();
      }
 
      void initProgress();
      void start();
 
      void readSettings();
      void writeSettings();
 
    private:
      QPointer<QAction> m_askAlphaAct;
      QList<QVariant> m_backlog;
      QMutex *m_cameraMutex;
      QPointer<QAction> m_openFilledAct;
      QPointer<ProgressBar> m_progress;
      QPointer<QAction> m_safeFileOpenAct;
      QFutureWatcher<Image *> * m_watcher;
 
      int m_qtVersion;
 
      bool m_safeFileOpen;
      bool m_openFilled;
      int m_defaultAlpha;
      bool m_requireFootprints;
 
      bool m_mappedRunning;
 
    private:
      class VariantToImageFunctor : public std::function<
          Image *(const QVariant &)> {
 
        public:
          VariantToImageFunctor(QMutex *cameraMutex, bool requireFootprints, QThread *targetThread,
              bool openFilled, int defaultAlpha, int qtVersion);
          Image *operator()(const QVariant &);
 
        private:
          QMutex *m_mutex;
          QThread *m_targetThread;
 
          int m_defaultAlpha;
          int m_qtVersion;
          bool m_openFilled;
          bool m_requireFootprints;
      };
  };
};
 
#endif