qgsrasterlayersaveasdialog.cpp

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/***************************************************************************
    qgsrasterlayersaveasdialog.cpp
    ---------------------
    begin                : May 2012
    copyright            : (C) 2012 by Marco Hugentobler
    email                : marco dot hugentobler at sourcepole dot ch
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#include "qgsapplication.h"
#include "qgslogger.h"
#include "qgscoordinatetransform.h"
#include "qgsrasterlayer.h"
#include "qgsrasterlayersaveasdialog.h"
#include "qgsrasterdataprovider.h"
#include "qgsrasterformatsaveoptionswidget.h"
#include "qgsgenericprojectionselector.h"

#include <QFileDialog>
#include <QMessageBox>
#include <QSettings>

QgsRasterLayerSaveAsDialog::QgsRasterLayerSaveAsDialog( QgsRasterLayer* rasterLayer,
    QgsRasterDataProvider* sourceProvider, const QgsRectangle& currentExtent,
    const QgsCoordinateReferenceSystem& layerCrs, const QgsCoordinateReferenceSystem& currentCrs,
    QWidget* parent, Qt::WindowFlags f ) :
    QDialog( parent, f )
    , mRasterLayer( rasterLayer ), mDataProvider( sourceProvider )
    , mCurrentExtent( currentExtent ), mLayerCrs( layerCrs )
    , mCurrentCrs( currentCrs )
    , mResolutionState( OriginalResolution )
{
  setupUi( this );
  mAddNoDataManuallyToolButton->setIcon( QgsApplication::getThemeIcon( "/mActionNewAttribute.png" ) );
  mLoadTransparentNoDataToolButton->setIcon( QgsApplication::getThemeIcon( "/mActionCopySelected.png" ) );
  mRemoveSelectedNoDataToolButton->setIcon( QgsApplication::getThemeIcon( "/mActionDeleteAttribute.png" ) );
  mRemoveAllNoDataToolButton->setIcon( QgsApplication::getThemeIcon( "/mActionRemove.png" ) );

  mNoDataTableWidget->setColumnCount( 2 );
  mNoDataTableWidget->setHorizontalHeaderItem( 0, new QTableWidgetItem( tr( "From" ) ) );
  mNoDataTableWidget->setHorizontalHeaderItem( 1, new QTableWidgetItem( tr( "To" ) ) );

  on_mRawModeRadioButton_toggled( true );

  setValidators();

  toggleResolutionSize();

  //only one hardcoded format at the moment
  QStringList myFormats;
  myFormats << "GTiff";
  foreach ( QString myFormat, myFormats )
  {
    mFormatComboBox->addItem( myFormat );
  }

  //fill reasonable default values depending on the provider
  if ( mDataProvider )
  {
    if ( mDataProvider->capabilities() & QgsRasterDataProvider::Size )
    {
      setOriginalResolution();
      int xSize = mDataProvider->xSize();
      int ySize = mDataProvider->ySize();
      mMaximumSizeXLineEdit->setText( QString::number( xSize ) );
      mMaximumSizeYLineEdit->setText( QString::number( ySize ) );
    }
    else //wms, sometimes wcs
    {
      mTileModeCheckBox->setChecked( true );
      mMaximumSizeXLineEdit->setText( QString::number( 2000 ) );
      mMaximumSizeYLineEdit->setText( QString::number( 2000 ) );
    }

    // setup creation option widget
    mCreateOptionsWidget->setProvider( mDataProvider->name() );
    if ( mDataProvider->name() == "gdal" )
    {
      mCreateOptionsWidget->setFormat( myFormats[0] );
    }
    mCreateOptionsWidget->setRasterLayer( mRasterLayer );
    mCreateOptionsWidget->update();
  }

  // Only do pyramids if dealing directly with GDAL.
  if ( mDataProvider && mDataProvider->capabilities() & QgsRasterDataProvider::BuildPyramids )
  {
    // setup pyramids option widget
    // mPyramidsOptionsWidget->createOptionsWidget()->setType( QgsRasterFormatSaveOptionsWidget::ProfileLineEdit );
    mPyramidsOptionsWidget->createOptionsWidget()->setRasterLayer( mRasterLayer );

    // TODO enable "use existing", has no effect for now, because using Create() in gdal provider
    // if ( ! mDataProvider->hasPyramids() )
    //   mPyramidsButtonGroup->button( QgsRaster::PyramidsCopyExisting )->setEnabled( false );
    mPyramidsUseExistingCheckBox->setEnabled( false );
    mPyramidsUseExistingCheckBox->setVisible( false );

    populatePyramidsLevels();
    connect( mPyramidsOptionsWidget, SIGNAL( overviewListChanged() ),
             this, SLOT( populatePyramidsLevels() ) );
  }
  else
  {
    mPyramidsGroupBox->setEnabled( false );
  }

  // restore checked state for most groupboxes (default is to restore collapsed state)
  // create options and pyramids will be preset, if user has selected defaults in the gdal options dlg
  mCreateOptionsGroupBox->setSaveCheckedState( true );
  //mTilesGroupBox->setSaveCheckedState( true );
  // don't restore nodata, it needs user input
  // pyramids are not necessarily built every time

  mTilesGroupBox->hide();

  mCrsSelector->setLayerCrs( mLayerCrs );
  mCrsSelector->setCrs( mCurrentCrs );
  connect( mCrsSelector, SIGNAL( crsChanged( QgsCoordinateReferenceSystem ) ),
           this, SLOT( crsChanged() ) );

  QPushButton* okButton = mButtonBox->button( QDialogButtonBox::Ok );
  if ( okButton )
  {
    okButton->setEnabled( false );
  }

  mExtentGroupBox->setOutputCrs( outputCrs() );
  mExtentGroupBox->setOriginalExtent( mDataProvider->extent(), mLayerCrs );
  mExtentGroupBox->setCurrentExtent( mCurrentExtent, mCurrentCrs );
  mExtentGroupBox->setOutputExtentFromOriginal();
  connect( mExtentGroupBox, SIGNAL( extentChanged( QgsRectangle ) ), this, SLOT( extentChanged() ) );

  recalcResolutionSize();
}

void QgsRasterLayerSaveAsDialog::setValidators()
{
  mXResolutionLineEdit->setValidator( new QDoubleValidator( this ) );
  mYResolutionLineEdit->setValidator( new QDoubleValidator( this ) );
  mColumnsLineEdit->setValidator( new QIntValidator( this ) );
  mRowsLineEdit->setValidator( new QIntValidator( this ) );
  mMaximumSizeXLineEdit->setValidator( new QIntValidator( this ) );
  mMaximumSizeYLineEdit->setValidator( new QIntValidator( this ) );
}

QgsRasterLayerSaveAsDialog::~QgsRasterLayerSaveAsDialog()
{
}

void QgsRasterLayerSaveAsDialog::on_mBrowseButton_clicked()
{
  QString fileName;

  QSettings settings;
  QString dirName = mSaveAsLineEdit->text().isEmpty() ? settings.value( "/UI/lastRasterFileDir", "." ).toString() : mSaveAsLineEdit->text();

  if ( mTileModeCheckBox->isChecked() )
  {
    while ( true )
    {
      // TODO: would not it be better to select .vrt file instead of directory?
      fileName = QFileDialog::getExistingDirectory( this, tr( "Select output directory" ), dirName );
      //fileName = QFileDialog::getSaveFileName( this, tr( "Select output file" ), QString(), tr( "VRT" ) + " (*.vrt *.VRT)" );

      if ( fileName.isEmpty() ) break; // canceled

      // Check if directory is empty
      QDir dir( fileName );
      QString baseName = QFileInfo( fileName ).baseName();
      QStringList filters;
      filters << QString( "%1.*" ).arg( baseName );
      QStringList files = dir.entryList( filters );
      if ( !files.isEmpty() )
      {
        QMessageBox::StandardButton button = QMessageBox::warning( this, tr( "Warning" ),
                                             tr( "The directory %1 contains files which will be overwritten: %2" ).arg( dir.absolutePath() ).arg( files.join( ", " ) ),
                                             QMessageBox::Ok | QMessageBox::Cancel );

        if ( button == QMessageBox::Ok )
        {
          break;
        }
        else
        {
          fileName = "";
        }
      }
      else
      {
        break;
      }
    }
  }
  else
  {
    fileName = QFileDialog::getSaveFileName( this, tr( "Select output file" ), dirName, tr( "GeoTIFF" ) + " (*.tif *.tiff *.TIF *.TIFF)" );
  }

  if ( !fileName.isEmpty() )
  {
    // ensure the user never ommited the extension from the file name
    if ( !fileName.toLower().endsWith( ".tif" ) && !fileName.toLower().endsWith( ".tiff" ) )
    {
      fileName += ".tif";
    }
    mSaveAsLineEdit->setText( fileName );
  }
}

void QgsRasterLayerSaveAsDialog::on_mSaveAsLineEdit_textChanged( const QString& text )
{
  QPushButton* okButton = mButtonBox->button( QDialogButtonBox::Ok );
  if ( !okButton )
  {
    return;
  }

  okButton->setEnabled( QFileInfo( text ).absoluteDir().exists() );
}


void QgsRasterLayerSaveAsDialog::on_mFormatComboBox_currentIndexChanged( const QString & text )
{
  //gdal-specific
  if ( mDataProvider && mDataProvider->name() == "gdal" )
  {
    mCreateOptionsWidget->setFormat( text );
    mCreateOptionsWidget->update();
  }
}

int QgsRasterLayerSaveAsDialog::nColumns() const
{
  return mColumnsLineEdit->text().toInt();
}

int QgsRasterLayerSaveAsDialog::nRows() const
{
  return mRowsLineEdit->text().toInt();
}

double QgsRasterLayerSaveAsDialog::xResolution() const
{
  return mXResolutionLineEdit->text().toDouble();
}

double QgsRasterLayerSaveAsDialog::yResolution() const
{
  return mYResolutionLineEdit->text().toDouble();
}

int QgsRasterLayerSaveAsDialog::maximumTileSizeX() const
{
  return mMaximumSizeXLineEdit->text().toInt();
}

int QgsRasterLayerSaveAsDialog::maximumTileSizeY() const
{
  return mMaximumSizeYLineEdit->text().toInt();
}

bool QgsRasterLayerSaveAsDialog::tileMode() const
{
  return mTileModeCheckBox->isChecked();
}

QString QgsRasterLayerSaveAsDialog::outputFileName() const
{
  return mSaveAsLineEdit->text();
}

QString QgsRasterLayerSaveAsDialog::outputFormat() const
{
  return mFormatComboBox->currentText();
}

QStringList QgsRasterLayerSaveAsDialog::createOptions() const
{
  return mCreateOptionsGroupBox->isChecked() ? mCreateOptionsWidget->options() : QStringList();
}

QgsRectangle QgsRasterLayerSaveAsDialog::outputRectangle() const
{
  return mExtentGroupBox->outputExtent();
}

void QgsRasterLayerSaveAsDialog::hideFormat()
{
  mFormatLabel->hide();
  mFormatComboBox->hide();
}

void QgsRasterLayerSaveAsDialog::hideOutput()
{
  mSaveAsLabel->hide();
  mSaveAsLineEdit->hide();
  mBrowseButton->hide();
  QPushButton* okButton = mButtonBox->button( QDialogButtonBox::Ok );
  if ( okButton )
  {
    okButton->setEnabled( true );
  }
}

void QgsRasterLayerSaveAsDialog::toggleResolutionSize()
{
  bool hasResolution = mDataProvider && mDataProvider->capabilities() & QgsRasterDataProvider::Size;

  bool on = mResolutionRadioButton->isChecked();
  mXResolutionLineEdit->setEnabled( on );
  mYResolutionLineEdit->setEnabled( on );
  mOriginalResolutionPushButton->setEnabled( on && hasResolution );
  mColumnsLineEdit->setEnabled( !on );
  mRowsLineEdit->setEnabled( !on );
  mOriginalSizePushButton->setEnabled( !on && hasResolution );
}

void QgsRasterLayerSaveAsDialog::setOriginalResolution()
{
  double xRes, yRes;

  if ( mDataProvider->capabilities() & QgsRasterDataProvider::Size )
  {
    xRes = mDataProvider->extent().width() / mDataProvider->xSize();
    yRes = mDataProvider->extent().height() / mDataProvider->ySize();
  }
  else
  {
    // Init to something if no original resolution is available
    xRes = yRes = mDataProvider->extent().width() / 100;
  }
  setResolution( xRes, yRes, mLayerCrs );
  mResolutionState = OriginalResolution;
  recalcSize();
}

void QgsRasterLayerSaveAsDialog::setResolution( double xRes, double yRes, const QgsCoordinateReferenceSystem& srcCrs )
{
  if ( srcCrs != outputCrs() )
  {
    // We reproject pixel rectangle from center of selected extent, of course, it gives
    // bigger xRes,yRes than reprojected edges (envelope), it may also be that
    // close to margins are higher resolutions (even very, too high)
    // TODO: consider more precise resolution calculation

    QgsPoint center = outputRectangle().center();
    QgsCoordinateTransform ct( srcCrs, outputCrs() );
    QgsPoint srsCenter = ct.transform( center, QgsCoordinateTransform::ReverseTransform );

    QgsRectangle srcExtent( srsCenter.x() - xRes / 2, srsCenter.y() - yRes / 2, srsCenter.x() + xRes / 2, srsCenter.y() + yRes / 2 );

    QgsRectangle extent =  ct.transform( srcExtent );
    xRes = extent.width();
    yRes = extent.height();
  }
  mXResolutionLineEdit->setText( QString::number( xRes ) );
  mYResolutionLineEdit->setText( QString::number( yRes ) );
}

void QgsRasterLayerSaveAsDialog::recalcSize()
{
  QgsDebugMsg( "Entered" );
  QgsRectangle extent = outputRectangle();
  int xSize =  xResolution() != 0 ? static_cast<int>( qRound( extent.width() / xResolution() ) ) : 0;
  int ySize =  yResolution() != 0 ? static_cast<int>( qRound( extent.height() / yResolution() ) ) : 0;
  mColumnsLineEdit->setText( QString::number( xSize ) );
  mRowsLineEdit->setText( QString::number( ySize ) );
  updateResolutionStateMsg();
}

void QgsRasterLayerSaveAsDialog::setOriginalSize()
{
  mColumnsLineEdit->setText( QString::number( mDataProvider->xSize() ) );
  mRowsLineEdit->setText( QString::number( mDataProvider->ySize() ) );
  recalcResolution();
}

void QgsRasterLayerSaveAsDialog::recalcResolution()
{
  QgsDebugMsg( "Entered" );
  QgsRectangle extent = outputRectangle();
  double xRes = nColumns() != 0 ? extent.width() / nColumns() : 0;
  double yRes = nRows() != 0 ? extent.height() / nRows() : 0;
  mXResolutionLineEdit->setText( QString::number( xRes ) );
  mYResolutionLineEdit->setText( QString::number( yRes ) );
  updateResolutionStateMsg();
}

void QgsRasterLayerSaveAsDialog::recalcResolutionSize()
{
  QgsDebugMsg( "Entered" );
  if ( mResolutionRadioButton->isChecked() )
  {
    recalcSize();
  }
  else
  {
    mResolutionState = UserResolution;
    recalcResolution();
  }
}

void QgsRasterLayerSaveAsDialog::updateResolutionStateMsg()
{
  QString msg;
  switch ( mResolutionState )
  {
    case OriginalResolution:
      msg = tr( "layer" );
      break;
    case UserResolution:
      msg = tr( "user defined" );
      break;
    default:
      break;
  }
  msg = tr( "Resolution (current: %1)" ).arg( msg );
  mResolutionGroupBox->setTitle( msg );
}

void QgsRasterLayerSaveAsDialog::extentChanged()
{
  // Whenever extent changes with fixed size, original resolution is lost
  if ( mSizeRadioButton->isChecked() )
  {
    mResolutionState = UserResolution;
  }
  recalcResolutionSize();
}

void QgsRasterLayerSaveAsDialog::crsChanged()
{
  if ( outputCrs() != mPreviousCrs )
  {
    mExtentGroupBox->setOutputCrs( outputCrs() );
    QgsExtentGroupBox::ExtentState state = mExtentGroupBox->extentState();

    // Reset extent
    // We could reproject previous but that would add additional space also if
    // it is was not necessary or at leas it could decrease accuracy
    if ( state == QgsExtentGroupBox::OriginalExtent )
    {
      mExtentGroupBox->setOutputExtentFromOriginal();
    }
    else if ( state == QgsExtentGroupBox::CurrentExtent )
    {
      mExtentGroupBox->setOutputExtentFromCurrent();
    }
    else
    {
      mExtentGroupBox->setOutputExtentFromUser( mExtentGroupBox->outputExtent(), mPreviousCrs );
    }

    // Reset resolution
    if ( mResolutionRadioButton->isChecked() )
    {
      if ( mResolutionState == OriginalResolution )
      {
        setOriginalResolution();
      }
      else
      {
        // reset from present resolution and present crs
        setResolution( xResolution(), yResolution(), mPreviousCrs );
      }
    }
    else
    {
      // Size does not change, we just recalc resolution from new extent
      recalcResolution();
    }
  }
  mPreviousCrs = outputCrs();
}

QgsCoordinateReferenceSystem QgsRasterLayerSaveAsDialog::outputCrs()
{
  return mCrsSelector->crs();
}

QgsRasterLayerSaveAsDialog::Mode QgsRasterLayerSaveAsDialog::mode() const
{
  if ( mRenderedModeRadioButton->isChecked() ) return RenderedImageMode;
  return RawDataMode;
}

void QgsRasterLayerSaveAsDialog::on_mRawModeRadioButton_toggled( bool checked )
{
  mNoDataGroupBox->setEnabled( checked && mDataProvider->bandCount() == 1 );
}

void QgsRasterLayerSaveAsDialog::on_mAddNoDataManuallyToolButton_clicked()
{
  addNoDataRow( std::numeric_limits<double>::quiet_NaN(), std::numeric_limits<double>::quiet_NaN() );
}

void QgsRasterLayerSaveAsDialog::on_mLoadTransparentNoDataToolButton_clicked()
{
  if ( !mRasterLayer->renderer() ) return;
  const QgsRasterTransparency* rasterTransparency = mRasterLayer->renderer()->rasterTransparency();
  if ( !rasterTransparency ) return;

  foreach ( QgsRasterTransparency::TransparentSingleValuePixel transparencyPixel, rasterTransparency->transparentSingleValuePixelList() )
  {
    if ( transparencyPixel.percentTransparent == 100 )
    {
      addNoDataRow( transparencyPixel.min, transparencyPixel.max );
      if ( transparencyPixel.min != transparencyPixel.max )
      {
        setNoDataToEdited( mNoDataTableWidget->rowCount() - 1 );
      }
    }
  }
}

void QgsRasterLayerSaveAsDialog::on_mRemoveSelectedNoDataToolButton_clicked()
{
  mNoDataTableWidget->removeRow( mNoDataTableWidget->currentRow() );
}

void QgsRasterLayerSaveAsDialog::on_mRemoveAllNoDataToolButton_clicked()
{
  while ( mNoDataTableWidget->rowCount() > 0 )
  {
    mNoDataTableWidget->removeRow( 0 );
  }
}

void QgsRasterLayerSaveAsDialog::addNoDataRow( double min, double max )
{
  mNoDataTableWidget->insertRow( mNoDataTableWidget->rowCount() );
  for ( int i = 0; i < 2; i++ )
  {
    double value = i == 0 ? min : max;
    QLineEdit *lineEdit = new QLineEdit();
    lineEdit->setFrame( false );
    lineEdit->setContentsMargins( 1, 1, 1, 1 );
    QString valueString;
    switch ( mRasterLayer->dataProvider()->srcDataType( 1 ) )
    {
      case QGis::Float32:
      case QGis::Float64:
        lineEdit->setValidator( new QDoubleValidator( 0 ) );
        if ( !qIsNaN( value ) )
        {
          valueString = QgsRasterBlock::printValue( value );
        }
        break;
      default:
        lineEdit->setValidator( new QIntValidator( 0 ) );
        if ( !qIsNaN( value ) )
        {
          valueString = QString::number( static_cast<int>( value ) );
        }
        break;
    }
    lineEdit->setText( valueString );
    mNoDataTableWidget->setCellWidget( mNoDataTableWidget->rowCount() - 1, i, lineEdit );

    adjustNoDataCellWidth( mNoDataTableWidget->rowCount() - 1, i );

    connect( lineEdit, SIGNAL( textEdited( const QString & ) ), this, SLOT( noDataCellTextEdited( const QString & ) ) );
  }
  mNoDataTableWidget->resizeColumnsToContents();
  mNoDataTableWidget->resizeRowsToContents();
}

void QgsRasterLayerSaveAsDialog::noDataCellTextEdited( const QString & text )
{
  Q_UNUSED( text );

  QLineEdit *lineEdit = dynamic_cast<QLineEdit *>( sender() );
  if ( !lineEdit ) return;
  int row = -1;
  int column = -1;
  for ( int r = 0 ; r < mNoDataTableWidget->rowCount(); r++ )
  {
    for ( int c = 0 ; c < mNoDataTableWidget->columnCount(); c++ )
    {
      if ( mNoDataTableWidget->cellWidget( r, c ) == sender() )
      {
        row = r;
        column = c;
        break;
      }
    }
    if ( row != -1 ) break;
  }
  QgsDebugMsg( QString( "row = %1 column =%2" ).arg( row ).arg( column ) );

  if ( column == 0 )
  {
    QLineEdit *toLineEdit = dynamic_cast<QLineEdit *>( mNoDataTableWidget->cellWidget( row, 1 ) );
    if ( !toLineEdit ) return;
    bool toChanged = mNoDataToEdited.value( row );
    QgsDebugMsg( QString( "toChanged = %1" ).arg( toChanged ) );
    if ( !toChanged )
    {
      toLineEdit->setText( lineEdit->text() );
    }
  }
  else if ( column == 1 )
  {
    setNoDataToEdited( row );
  }
}

void QgsRasterLayerSaveAsDialog::on_mTileModeCheckBox_toggled( bool toggled )
{
  if ( toggled )
  {
    // enable pyramids

    // Disabled (Radim), auto enabling of pyramids was making impression that
    // we (programmers) know better what you (user) want to do,
    // certainly auto expaning was bad experience

    //if ( ! mPyramidsGroupBox->isChecked() )
    //  mPyramidsGroupBox->setChecked( true );

    // Auto expanding mPyramidsGroupBox is bad - it auto crolls content of dialog
    //if ( mPyramidsGroupBox->isCollapsed() )
    //  mPyramidsGroupBox->setCollapsed( false );
    //mPyramidsOptionsWidget->checkAllLevels( true );

    // Show / hide tile options
    mTilesGroupBox->show();
  }
  else
  {
    mTilesGroupBox->hide();
  }
}

void QgsRasterLayerSaveAsDialog::on_mPyramidsGroupBox_toggled( bool toggled )
{
  Q_UNUSED( toggled );
  populatePyramidsLevels();
}

void QgsRasterLayerSaveAsDialog::populatePyramidsLevels()
{
  QString text;

  if ( mPyramidsGroupBox->isChecked() )
  {
    QList<QgsRasterPyramid> myPyramidList;
    // if use existing, get pyramids from actual layer
    // but that's not available yet
    if ( mPyramidsUseExistingCheckBox->isChecked() )
    {
      myPyramidList = mDataProvider->buildPyramidList();
    }
    else
    {
      if ( ! mPyramidsOptionsWidget->overviewList().isEmpty() )
        myPyramidList = mDataProvider->buildPyramidList( mPyramidsOptionsWidget->overviewList() );
    }
    QList<QgsRasterPyramid>::iterator myRasterPyramidIterator;
    for ( myRasterPyramidIterator = myPyramidList.begin();
          myRasterPyramidIterator != myPyramidList.end();
          ++myRasterPyramidIterator )
    {
      if ( ! mPyramidsUseExistingCheckBox->isChecked() ||  myRasterPyramidIterator->exists )
      {
        text += QString::number( myRasterPyramidIterator->xDim ) + QString( "x" ) +
                QString::number( myRasterPyramidIterator->yDim ) + " ";
      }
    }
  }

  mPyramidResolutionsLineEdit->setText( text.trimmed() );
}

void QgsRasterLayerSaveAsDialog::setNoDataToEdited( int row )
{
  if ( row >= mNoDataToEdited.size() )
  {
    mNoDataToEdited.resize( row + 1 );
  }
  mNoDataToEdited[row] = true;
}

double QgsRasterLayerSaveAsDialog::noDataCellValue( int row, int column ) const
{
  QLineEdit *lineEdit = dynamic_cast<QLineEdit *>( mNoDataTableWidget->cellWidget( row, column ) );
  if ( !lineEdit || lineEdit->text().isEmpty() )
  {
    std::numeric_limits<double>::quiet_NaN();
  }
  return lineEdit->text().toDouble();
}

void QgsRasterLayerSaveAsDialog::adjustNoDataCellWidth( int row, int column )
{
  QLineEdit *lineEdit = dynamic_cast<QLineEdit *>( mNoDataTableWidget->cellWidget( row, column ) );
  if ( !lineEdit ) return;

  int width = qMax( lineEdit->fontMetrics().width( lineEdit->text() ) + 10, 100 );
  width = qMax( width, mNoDataTableWidget->columnWidth( column ) );

  lineEdit->setFixedWidth( width );
}

QgsRasterRangeList QgsRasterLayerSaveAsDialog::noData() const
{
  QgsRasterRangeList noDataList;
  if ( ! mNoDataGroupBox->isChecked() )
    return noDataList;

  for ( int r = 0 ; r < mNoDataTableWidget->rowCount(); r++ )
  {
    QgsRasterRange noData( noDataCellValue( r, 0 ), noDataCellValue( r, 1 ) );
    noDataList.append( noData );

  }
  return noDataList;
}

QList<int> QgsRasterLayerSaveAsDialog::pyramidsList() const
{
  return mPyramidsGroupBox->isChecked() ? mPyramidsOptionsWidget->overviewList() : QList<int>();
}

QgsRaster::RasterBuildPyramids QgsRasterLayerSaveAsDialog::buildPyramidsFlag() const
{
  if ( ! mPyramidsGroupBox->isChecked() )
    return QgsRaster::PyramidsFlagNo;
  else if ( mPyramidsUseExistingCheckBox->isChecked() )
    return QgsRaster::PyramidsCopyExisting;
  else
    return QgsRaster::PyramidsFlagYes;
}

bool QgsRasterLayerSaveAsDialog::validate() const
{
  if ( mCreateOptionsGroupBox->isChecked() )
  {
    QString message = mCreateOptionsWidget->validateOptions( true, false );
    if ( !message.isNull() )
      return false;
  }
  if ( mPyramidsGroupBox->isChecked() )
  {
    QString message = mPyramidsOptionsWidget->createOptionsWidget()->validateOptions( true, false );
    if ( !message.isNull() )
      return false;
  }
  return true;
}