fix measurement dialog translation (fixes #12262)

Author: jef-n

python/core/qgis.sip

@@ -129,6 +129,8 @@ class QGis
     static UnitType fromLiteral( QString  literal, QGis::UnitType defaultType = UnknownUnit );
     //! Provides translated version of the type value
     static QString tr( QGis::UnitType unit );
+    //! Provides type value from translated version
+    static UnitType fromTr( QString literal, QGis::UnitType defaultType = UnknownUnit );
     //! Returns the conversion factor between the specified units
     static double fromUnitToUnitFactor( QGis::UnitType fromUnit, QGis::UnitType toUnit );
 

src/app/qgsmeasuredialog.cpp

@@ -43,14 +43,14 @@ QgsMeasureDialog::QgsMeasureDialog( QgsMeasureTool* tool, Qt::WindowFlags f )
   mMeasureArea = tool->measureArea();
   mTotal = 0.;
 
-  mUnitsCombo->addItem( tr( "Meters" ) );
-  mUnitsCombo->addItem( tr( "Feet" ) );
-  mUnitsCombo->addItem( tr( "Degrees" ) );
-  mUnitsCombo->addItem( tr( "Nautical Miles" ) );
+  mUnitsCombo->addItem( QGis::tr( QGis::Meters ) );
+  mUnitsCombo->addItem( QGis::tr( QGis::Feet ) );
+  mUnitsCombo->addItem( QGis::tr( QGis::Degrees ) );
+  mUnitsCombo->addItem( QGis::tr( QGis::NauticalMiles ) );
 
   QSettings settings;
-  QString units = settings.value( "/qgis/measure/displayunits", "meters" ).toString();
-  mUnitsCombo->setCurrentIndex( mUnitsCombo->findText( units, Qt::MatchFixedString ) );
+  QString units = settings.value( "/qgis/measure/displayunits", QGis::toLiteral( QGis::Meters ) ).toString();
+  mUnitsCombo->setCurrentIndex( mUnitsCombo->findText( QGis::tr( QGis::fromLiteral( units ) ), Qt::MatchFixedString ) );
 
   updateSettings();
 
@@ -66,7 +66,7 @@ void QgsMeasureDialog::updateSettings()
   mDecimalPlaces = settings.value( "/qgis/measure/decimalplaces", "3" ).toInt();
   mCanvasUnits = mTool->canvas()->mapUnits();
   // Configure QgsDistanceArea
-  mDisplayUnits = QGis::fromLiteral( mUnitsCombo->currentText().toLower() );
+  mDisplayUnits = QGis::fromTr( mUnitsCombo->currentText() );
   mDa.setSourceCrs( mTool->canvas()->mapSettings().destinationCrs().srsid() );
   mDa.setEllipsoid( QgsProject::instance()->readEntry( "Measure", "/Ellipsoid", GEO_NONE ) );
   // Only use ellipsoidal calculation when project wide transformation is enabled.
@@ -92,7 +92,7 @@ void QgsMeasureDialog::updateSettings()
 
 void QgsMeasureDialog::unitsChanged( const QString &units )
 {
-  mDisplayUnits = QGis::fromLiteral( units.toLower() );
+  mDisplayUnits = QGis::fromTr( units );
   mTable->clear();
   mTotal = 0.;
   updateUi();
@@ -350,4 +350,3 @@ void QgsMeasureDialog::convertMeasurement( double &measure, QGis::UnitType &u, b
   mDa.convertMeasurement( measure, myUnits, mDisplayUnits, isArea );
   u = myUnits;
 }
-

src/core/qgis.cpp

@@ -120,6 +120,18 @@ QString QGis::tr( QGis::UnitType unit )
   return QCoreApplication::translate( "QGis::UnitType", qPrintable( toLiteral( unit ) ) );
 }
 
+QGis::UnitType QGis::fromTr( QString literal, QGis::UnitType defaultType )
+{
+  for ( unsigned int i = 0; i < ( sizeof( qgisUnitTypes ) / sizeof( qgisUnitTypes[0] ) ); i++ )
+  {
+    if ( literal == QGis::tr( static_cast<UnitType>( i ) ) )
+    {
+      return static_cast<UnitType>( i );
+    }
+  }
+  return defaultType;
+}
+
 double QGis::fromUnitToUnitFactor( QGis::UnitType fromUnit, QGis::UnitType toUnit )
 {
 #define DEGREE_TO_METER 111319.49079327358

src/core/qgis.h

@@ -246,6 +246,8 @@ class CORE_EXPORT QGis
     static UnitType fromLiteral( QString  literal, QGis::UnitType defaultType = UnknownUnit );
     //! Provides translated version of the type value
     static QString tr( QGis::UnitType unit );
+    //! Provides type value from translated version
+    static UnitType fromTr( QString literal, QGis::UnitType defaultType = UnknownUnit );
     //! Returns the conversion factor between the specified units
     static double fromUnitToUnitFactor( QGis::UnitType fromUnit, QGis::UnitType toUnit );
 

src/core/qgsdistancearea.cpp

@@ -1026,8 +1026,7 @@ QString QgsDistanceArea::textUnit( double value, int decimals, QGis::UnitType u,
       //intentional fall-through
     default:
       QgsDebugMsg( QString( "Error: not picked up map units - actual value = %1" ).arg( u ) );
-  };
-
+  }
 
   return QLocale::system().toString( value, 'f', decimals ) + unitLabel;
 }

src/core/qgssnappingutils.cpp

@@ -206,7 +206,8 @@ QgsPointLocator::Match QgsSnappingUtils::snapToMap( const QPoint& point, QgsPoin
 
 QgsPointLocator::Match QgsSnappingUtils::snapToMap( const QgsPoint& pointMap, QgsPointLocator::MatchFilter* filter )
 {
-  Q_ASSERT( mMapSettings.hasValidSettings() );
+  if ( !mMapSettings.hasValidSettings() )
+    return QgsPointLocator::Match();
 
   if ( mSnapToMapMode == SnapCurrentLayer )
   {