cxFileWatcherWidget.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

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modification, are permitted provided that the following conditions are met:

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   this list of conditions and the following disclaimer.

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   this list of conditions and the following disclaimer in the documentation 
   and/or other materials provided with the distribution.

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   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 
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=========================================================================*/

#include "cxFileWatcherWidget.h"
#include "cxLogger.h"
#include <QFileSystemWatcher>
#include <QFileInfo>


namespace cx
{
FileWatcherWidget::FileWatcherWidget(QWidget* parent, QString objectName, QString windowTitle) :
    BaseWidget(parent, objectName, windowTitle),
    mFileSystemWatcher(new QFileSystemWatcher())
{
  connect(mFileSystemWatcher, SIGNAL(fileChanged(const QString&)), this, SLOT(previewFileSlot(const QString&)));
}

FileWatcherWidget::~FileWatcherWidget()
{}

bool FileWatcherWidget::internalOpenNewFile(const QString absoluteFilePath)
{
  if(mCurrentFile)
  {
    if(mCurrentFile->isOpen())
    {
      this->watchFile(false);
      mCurrentFile->close();
    }
  }

  mCurrentFile.reset(new QFile(absoluteFilePath));
  this->watchFile(true);

  if(!mCurrentFile->exists())
  {
    return false;
  }

  if(!mCurrentFile->open(QIODevice::ReadOnly))
  {
    reportWarning("Could not open file "+absoluteFilePath);
    //return false; Is this missing???
  }
  return true;
}

void FileWatcherWidget::watchFile(bool on)
{
        if (!mCurrentFile)
                return;

        QFileInfo info(*mCurrentFile);

        if (on)
        {
                if (!mFileSystemWatcher->files().contains(info.absoluteFilePath()))
                        mFileSystemWatcher->addPath(info.absoluteFilePath());
        }
        else
        {
                mFileSystemWatcher->removePath(info.absoluteFilePath());
        }
}
} /* namespace cx */