/**************************** REGION ********************************/
void QgsGrassNewMapset::setRegionPage()
{
QgsDebugMsg( "entered." );
// Set defaults
if ( !mRegionModified )
{
setGrassRegionDefaults();
}
// Create new projection
QgsCoordinateReferenceSystem newSrs;
if ( mProjRadioButton->isChecked() )
{
QgsDebugMsg( QString( "selectedCrsId() = %1" ).arg( mProjectionSelector->selectedCrsId() ) );
if ( mProjectionSelector->selectedCrsId() > 0 )
{
newSrs.createFromSrsId( mProjectionSelector->selectedCrsId() );
if ( ! newSrs.isValid() )
{
QMessageBox::warning( 0, tr( "Warning" ), tr( "Cannot create projection." ) );
}
}
}
// Reproject previous region if it was modified
// and if previous and current projection is valid
if ( mRegionModified && newSrs.isValid() && mSrs.isValid()
&& newSrs.srsid() != mSrs.srsid() )
{
QgsCoordinateTransform trans( mSrs, newSrs );
double n = mNorthLineEdit->text().toDouble();
double s = mSouthLineEdit->text().toDouble();
double e = mEastLineEdit->text().toDouble();
double w = mWestLineEdit->text().toDouble();
std::vector<QgsPoint> points;
// TODO: this is not perfect
points.push_back( QgsPoint( w, s ) );
points.push_back( QgsPoint( e, n ) );
bool ok = true;
for ( int i = 0; i < 2; i++ )
{
try
{
points[i] = trans.transform( points[i] );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( "Cannot transform point" );
ok = false;
break;
}
}
if ( ok )
{
mNorthLineEdit->setText( QString::number( points[1].y() ) );
mSouthLineEdit->setText( QString::number( points[0].y() ) );
mEastLineEdit->setText( QString::number( points[1].x() ) );
mWestLineEdit->setText( QString::number( points[0].x() ) );
}
else
{
QMessageBox::warning( 0, tr( "Warning" ), tr( "Cannot reproject previously set region, default region set." ) );
setGrassRegionDefaults();
}
}
// Set current region projection
mSrs = newSrs;
// Enable / disable region selection widgets
if ( mNoProjRadioButton->isChecked() )
{
mRegionMap->hide();
mCurrentRegionButton->hide();
mRegionsComboBox->hide();
mRegionButton->hide();
mSetRegionFrame->hide();
}
else
{
mRegionMap->show();
mCurrentRegionButton->show();
mRegionsComboBox->show();
mRegionButton->show();
mSetRegionFrame->show();
QgsRectangle ext = mIface->mapCanvas()->extent();
if ( ext.xMinimum() >= ext.xMaximum() || ext.yMinimum() >= ext.yMaximum() )
{
mCurrentRegionButton->setEnabled( false );
}
}
checkRegion();
if ( !mNoProjRadioButton->isChecked() )
{
drawRegion();
}
}
/**************************** REGION ********************************/
void QgsGrassNewMapset::setRegionPage()
{
// Set defaults
if ( !mRegionModified )
{
setGrassRegionDefaults();
}
// Create new projection
QgsCoordinateReferenceSystem newCrs;
if ( mProjRadioButton->isChecked() )
{
QgsDebugMsg( QString( "selectedCrsId() = %1" ).arg( mProjectionSelector->crs().srsid() ) );
if ( mProjectionSelector->crs().srsid() > 0 )
{
newCrs = mProjectionSelector->crs();
if ( ! newCrs.isValid() )
{
QgsGrass::warning( tr( "Cannot create projection." ) );
}
}
}
// Reproject previous region if it was modified
// and if previous and current projection is valid
if ( mRegionModified && newCrs.isValid() && mCrs.isValid()
&& newCrs.srsid() != mCrs.srsid() )
{
QgsCoordinateTransform trans( mCrs, newCrs );
double n = mNorthLineEdit->text().toDouble();
double s = mSouthLineEdit->text().toDouble();
double e = mEastLineEdit->text().toDouble();
double w = mWestLineEdit->text().toDouble();
std::vector<QgsPointXY> points;
// TODO: this is not perfect
points.push_back( QgsPointXY( w, s ) );
points.push_back( QgsPointXY( e, n ) );
bool ok = true;
for ( int i = 0; i < 2; i++ )
{
try
{
points[i] = trans.transform( points[i] );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
QgsDebugMsg( "Cannot transform point" );
ok = false;
break;
}
}
if ( ok )
{
int precision = newCrs.mapUnits() == QgsUnitTypes::DistanceDegrees ? 6 : 1;
mNorthLineEdit->setText( qgsDoubleToString( points[1].y(), precision ) );
mSouthLineEdit->setText( qgsDoubleToString( points[0].y(), precision ) );
mEastLineEdit->setText( qgsDoubleToString( points[1].x(), precision ) );
mWestLineEdit->setText( qgsDoubleToString( points[0].x(), precision ) );
}
else
{
QgsGrass::warning( tr( "Cannot reproject previously set region, default region set." ) );
setGrassRegionDefaults();
}
}
// Set current region projection
mCrs = newCrs;
// Enable / disable region selection widgets
if ( mNoProjRadioButton->isChecked() )
{
mRegionMap->hide();
mCurrentRegionButton->hide();
mRegionsComboBox->hide();
mRegionButton->hide();
mSetRegionFrame->hide();
}
else
{
mRegionMap->show();
mCurrentRegionButton->show();
mRegionsComboBox->show();
mRegionButton->show();
mSetRegionFrame->show();
QgsRectangle ext = mIface->mapCanvas()->extent();
mCurrentRegionButton->setEnabled( !ext.isEmpty() );
}
checkRegion();
if ( !mNoProjRadioButton->isChecked() )
{
drawRegion();
}
}