cxFilePreviewWidget.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:

1. Redistributions of source code must retain the above copyright notice, 
   this list of conditions and the following disclaimer.

2. 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.

3. Neither the name of the copyright holder 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 HOLDER OR CONTRIBUTORS BE LIABLE 
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
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=========================================================================*/

#include <cxFilePreviewWidget.h>

#include <QTextEdit>
#include <QLabel>
#include <QTextDocument>
#include <QPushButton>
#include <QTextStream>
//#include <QFileInfo>
#include <QFile>
#include <iostream>
#include "cxTypeConversions.h"
#include <QFileSystemWatcher>
#include "cxLogger.h"
#include "snwSyntaxHighlighter.h"

namespace cx
{

FilePreviewWidget::FilePreviewWidget(QWidget* parent) :
                FileWatcherWidget(parent, "file_preview_widget", "File Preview"),
        mTextDocument(new QTextDocument(this)),
        mTextEdit(new QTextEdit(this)),
        mSaveButton(new QPushButton("Save", this))
{
        this->setToolTip("Preview and edit a file");
        mSyntaxHighlighter = NULL;
  connect(mSaveButton, SIGNAL(clicked()), this, SLOT(saveSlot()));
  mSaveButton->setEnabled(false);

  QHBoxLayout* buttonLayout = new QHBoxLayout();
  buttonLayout->addStretch();
  buttonLayout->setMargin(0);
  buttonLayout->addWidget(mSaveButton);

  QVBoxLayout* layout = new QVBoxLayout(this);
  layout->setMargin(0);
  layout->addWidget(mTextEdit);
  layout->addLayout(buttonLayout);

  connect(mTextEdit, SIGNAL(textChanged()), this, SLOT(textChangedSlot()));
  mTextEdit->setDocument(mTextDocument);
  mTextEdit->setLineWrapMode(QTextEdit::NoWrap);

  this->setSyntaxHighLighter<snw::SyntaxHighlighter>();
}

FilePreviewWidget::~FilePreviewWidget()
{}

void FilePreviewWidget::textChangedSlot()
{
        mSaveButton->setEnabled(mTextDocument->isModified());
}

void FilePreviewWidget::previewFileSlot(const QString& absoluteFilePath)
{
  mSaveButton->setEnabled(false);

  if(!this->internalOpenNewFile(absoluteFilePath))
        return;

  QTextStream stream(mCurrentFile.get());
  QString text = stream.readAll();
  mCurrentFile->close();

  mTextDocument->setPlainText(text);
  mTextDocument->setModified(false);

  this->textChangedSlot();
}

void FilePreviewWidget::saveSlot()
{
  if(!mCurrentFile)
    return;

  if(!mCurrentFile->open(QIODevice::WriteOnly | QIODevice::Truncate))
  {
    reportWarning("Could not open file "+mCurrentFile->fileName());
    return;
  }

  mCurrentFile->write(mTextDocument->toPlainText().toLatin1());
  mCurrentFile->close();

  mTextDocument->setModified(false);

}

}//namespace cx