Merge pull request #7188 from elpaso/locale-formatting

[bugfix] Fix double precision I/O in form widgets

src/app/vertextool/qgsvertexeditor.cpp

@@ -211,15 +211,23 @@ bool QgsVertexEditorModel::setData( const QModelIndex &index, const QVariant &va
     return false;
   }
 
-  double x = ( index.column() == 0 ? value.toDouble() : mSelectedFeature->vertexMap().at( index.row() )->point().x() );
-  double y = ( index.column() == 1 ? value.toDouble() : mSelectedFeature->vertexMap().at( index.row() )->point().y() );
+  // Get double value wrt current locale.
+  bool ok;
+  double doubleValue = QLocale().toDouble( value.toString(), &ok );
+  // If not valid and locale's decimal point is not '.' let's try with english locale
+  if ( ! ok && QLocale().decimalPoint() != '.' )
+  {
+    doubleValue = QLocale( QLocale::English ).toDouble( value.toString() );
+  }
+
+  double x = ( index.column() == 0 ? doubleValue : mSelectedFeature->vertexMap().at( index.row() )->point().x() );
+  double y = ( index.column() == 1 ? doubleValue : mSelectedFeature->vertexMap().at( index.row() )->point().y() );
 
   if ( index.column() == mRCol ) // radius modified
   {
     if ( index.row() == 0 || index.row() >= mSelectedFeature->vertexMap().count() - 1 )
       return false;
 
-    double r = value.toDouble();
     double x1 = mSelectedFeature->vertexMap().at( index.row() - 1 )->point().x();
     double y1 = mSelectedFeature->vertexMap().at( index.row() - 1 )->point().y();
     double x2 = x;
@@ -228,7 +236,7 @@ bool QgsVertexEditorModel::setData( const QModelIndex &index, const QVariant &va
     double y3 = mSelectedFeature->vertexMap().at( index.row() + 1 )->point().y();
 
     QgsPoint result;
-    if ( QgsGeometryUtils::segmentMidPoint( QgsPoint( x1, y1 ), QgsPoint( x3, y3 ), result, r, QgsPoint( x2, y2 ) ) )
+    if ( QgsGeometryUtils::segmentMidPoint( QgsPoint( x1, y1 ), QgsPoint( x3, y3 ), result, doubleValue, QgsPoint( x2, y2 ) ) )
     {
       x = result.x();
       y = result.y();

src/core/qgsfield.cpp

@@ -22,6 +22,7 @@
 
 #include <QDataStream>
 #include <QIcon>
+#include <QLocale>
 
 /***************************************************************************
  * This class is considered CRITICAL and any change MUST be accompanied with
@@ -208,9 +209,51 @@ QString QgsField::displayString( const QVariant &v ) const
     return QgsApplication::nullRepresentation();
   }
 
-  if ( d->type == QVariant::Double && d->precision > 0 )
-    return QString::number( v.toDouble(), 'f', d->precision );
-
+  // Special treatment for numeric types if group separator is set or decimalPoint is not a dot
+  if ( d->type == QVariant::Double )
+  {
+    // Locales with decimal point != '.' or that require group separator: use QLocale
+    if ( QLocale().decimalPoint() != '.' ||
+         !( QLocale().numberOptions() & QLocale::NumberOption::OmitGroupSeparator ) )
+    {
+      if ( d->precision > 0 )
+      {
+        return QLocale().toString( v.toDouble(), 'f', d->precision );
+      }
+      else
+      {
+        // Precision is not set, let's guess it from the
+        // standard conversion to string
+        QString s( v.toString() );
+        int dotPosition( s.indexOf( '.' ) );
+        int precision;
+        if ( dotPosition < 0 )
+        {
+          precision = 0;
+        }
+        else
+        {
+          precision = s.length() - dotPosition - 1;
+        }
+        return QLocale().toString( v.toDouble(), 'f', precision );
+      }
+    }
+    // Default for doubles with precision
+    else if ( d->type == QVariant::Double && d->precision > 0 )
+    {
+      return QString::number( v.toDouble(), 'f', d->precision );
+    }
+  }
+  // Other numeric types than doubles
+  else if ( isNumeric() &&
+            ! QLocale().numberOptions() & QLocale::NumberOption::OmitGroupSeparator )
+  {
+    bool ok;
+    qlonglong converted( v.toLongLong( &ok ) );
+    if ( ok )
+      return QLocale().toString( converted );
+  }
+  // Fallback if special rules do not apply
   return v.toString();
 }
 
@@ -234,6 +277,68 @@ bool QgsField::convertCompatible( QVariant &v ) const
     return false;
   }
 
+  // Give it a chance to convert to double since for not '.' locales
+  // we accept both comma and dot as decimal point
+  if ( d->type == QVariant::Double && v.type() == QVariant::String )
+  {
+    QVariant tmp( v );
+    if ( !tmp.convert( d->type ) )
+    {
+      // This might be a string with thousand separator: use locale to convert
+      bool ok;
+      double d = QLocale().toDouble( v.toString(), &ok );
+      if ( ok )
+      {
+        v = QVariant( d );
+        return true;
+      }
+      // For not 'dot' locales, we also want to accept '.'
+      if ( QLocale().decimalPoint() != '.' )
+      {
+        d = QLocale( QLocale::English ).toDouble( v.toString(), &ok );
+        if ( ok )
+        {
+          v = QVariant( d );
+          return true;
+        }
+      }
+    }
+  }
+
+  // For string representation of an int we also might have thousand separator
+  if ( d->type == QVariant::Int && v.type() == QVariant::String )
+  {
+    QVariant tmp( v );
+    if ( !tmp.convert( d->type ) )
+    {
+      // This might be a string with thousand separator: use locale to convert
+      bool ok;
+      int i = QLocale().toInt( v.toString(), &ok );
+      if ( ok )
+      {
+        v = QVariant( i );
+        return true;
+      }
+    }
+  }
+
+  // For string representation of a long we also might have thousand separator
+  if ( d->type == QVariant::LongLong && v.type() == QVariant::String )
+  {
+    QVariant tmp( v );
+    if ( !tmp.convert( d->type ) )
+    {
+      // This might be a string with thousand separator: use locale to convert
+      bool ok;
+      qlonglong l = QLocale().toLongLong( v.toString(), &ok );
+      if ( ok )
+      {
+        v = QVariant( l );
+        return true;
+      }
+    }
+  }
+
   //String representations of doubles in QVariant will return false to convert( QVariant::Int )
   //work around this by first converting to double, and then checking whether the double is convertible to int
   if ( d->type == QVariant::Int && v.canConvert( QVariant::Double ) )
@@ -258,6 +363,7 @@ bool QgsField::convertCompatible( QVariant &v ) const
     return true;
   }
 
+
   if ( !v.convert( d->type ) )
   {
     v = QVariant( d->type );

src/gui/editorwidgets/qgstexteditwrapper.cpp

@@ -217,7 +217,9 @@ void QgsTextEditWrapper::setWidgetValue( const QVariant &val )
       v = QgsApplication::nullRepresentation();
   }
   else
-    v = val.toString();
+  {
+    v = field().displayString( val );
+  }
 
   if ( mTextEdit )
   {

src/gui/qgsfieldvalidator.cpp

@@ -56,7 +56,16 @@ QgsFieldValidator::QgsFieldValidator( QObject *parent, const QgsField &field, co
     {
       if ( mField.length() > 0 && mField.precision() > 0 )
       {
-        QString re = QStringLiteral( "-?\\d{0,%1}(\\.\\d{0,%2})?" ).arg( mField.length() - mField.precision() ).arg( mField.precision() );
+        QString re;
+        // Also accept locale's decimalPoint if it's not a dot
+        if ( QLocale().decimalPoint() != '.' )
+        {
+          re = QStringLiteral( "-?\\d{0,%1}([\\.%2]\\d{0,%3})?" ).arg( mField.length() - mField.precision() ).arg( QLocale().decimalPoint() ).arg( mField.precision() );
+        }
+        else
+        {
+          re = QStringLiteral( "-?\\d{0,%1}([\\.,]\\d{0,%2})?" ).arg( mField.length() - mField.precision() ).arg( mField.precision() );
+        }
         mValidator = new QRegExpValidator( QRegExp( re ), parent );
       }
       else if ( mField.length() > 0 && mField.precision() == 0 )
@@ -66,7 +75,16 @@ QgsFieldValidator::QgsFieldValidator( QObject *parent, const QgsField &field, co
       }
       else if ( mField.precision() > 0 )
       {
-        QString re = QStringLiteral( "-?\\d*(\\.\\d{0,%1})?" ).arg( mField.precision() );
+        QString re;
+        // Also accept locale's decimalPoint if it's not a dot
+        if ( QLocale().decimalPoint() != '.' )
+        {
+          re = QStringLiteral( "-?\\d*([\\.%1]\\d{0,%2})?" ).arg( QLocale().decimalPoint(), mField.precision() );
+        }
+        else
+        {
+          re = QStringLiteral( "-?\\d*([\\.]\\d{0,%1})?" ).arg( mField.precision() );
+        }
         mValidator = new QRegExpValidator( QRegExp( re ), parent );
       }
       else
@@ -112,12 +130,6 @@ QValidator::State QgsFieldValidator::validate( QString &s, int &i ) const
   // delegate to the child validator if any
   if ( mValidator )
   {
-    // force to use the '.' as a decimal point or in case we are using QDoubleValidator
-    // we can get a valid number with a comma depending on current locale
-    // ... but this will fail subsequently when converted from string to double and
-    // becomes a NULL!
-    if ( mField.type() == QVariant::Double )
-      s = s.replace( ',', '.' );
     QValidator::State result = mValidator->validate( s, i );
     return result;
   }