Merge pull request #46419 from Joonalai/improve-format-datetimes

python/core/auto_generated/fieldformatter/qgsdatetimefieldformatter.sip.in

@@ -39,11 +39,6 @@ Default constructor of field formatter for a date time field.
     virtual QString representValue( QgsVectorLayer *layer, int fieldIndex, const QVariantMap &config, const QVariant &cache, const QVariant &value ) const;
 
 
-    static void applyLocaleChange();
-%Docstring
-Adjusts the date time formats according to locale.
-%End
-
     static QString defaultFormat( QVariant::Type type );
 %Docstring
 Gets the default format in function of the type.
@@ -53,6 +48,7 @@ The type is expected to be one of
 - QVariant.Date
 - QVariant.Time
 %End
+
 };
 
 /************************************************************************

python/core/auto_generated/qgsapplication.sip.in

@@ -441,6 +441,14 @@ Returns the QGIS platform name, e.g., "desktop", "server", "qgis_process" or "ex
 Returns the QGIS locale.
 
 .. versionadded:: 3.0
+%End
+
+    static void setLocale( const QLocale &locale );
+%Docstring
+Sets the QGIS locale - used mainly by 3rd party apps and tests.
+In QGIS this is internally triggered by the application in startup.
+
+.. versionadded:: 3.22.2
 %End
 
     static QString userThemesFolder();
@@ -1080,6 +1088,15 @@ In order to register translatable strings, connect to this signal and register t
 .. versionadded:: 3.4
 %End
 
+
+    void localeChanged();
+%Docstring
+Emitted when project locale has been changed.
+
+.. versionadded:: 3.22.2
+%End
+
+
 };
 
 

src/app/main.cpp

@@ -113,7 +113,6 @@ typedef SInt32 SRefCon;
 
 #include "qgsuserprofilemanager.h"
 #include "qgsuserprofile.h"
-#include "qgsdatetimefieldformatter.h"
 
 #ifdef HAVE_OPENCL
 #include "qgsopenclutils.h"
@@ -1032,14 +1031,14 @@ int main( int argc, char *argv[] )
     }
     QLocale::setDefault( currentLocale );
 
-    // Date time settings
-    QgsDateTimeFieldFormatter::applyLocaleChange();
-
     QgsApplication::setTranslation( translationCode );
   }
 
   QgsApplication myApp( argc, argv, myUseGuiFlag, QString(), QStringLiteral( "desktop" ) );
 
+  // Set locale to emit QgsApplication's localeChanged signal
+  myApp.setLocale( QLocale() );
+
   //write the log messages written before creating QgsApplication
   for ( const QString &preApplicationLogMessage : std::as_const( preApplicationLogMessages ) )
     QgsMessageLog::logMessage( preApplicationLogMessage );

src/core/fieldformatter/qgsdatetimefieldformatter.cpp

@@ -98,13 +98,6 @@ QString QgsDateTimeFieldFormatter::representValue( QgsVectorLayer *layer, int fi
   return result;
 }
 
-void QgsDateTimeFieldFormatter::applyLocaleChange()
-{
-  QString dateFormat = QLocale().dateFormat( QLocale::FormatType::ShortFormat );
-  QgsDateTimeFieldFormatter::DATETIME_FORMAT = QString( "%1 %2" ).arg( dateFormat, QgsDateTimeFieldFormatter::TIME_FORMAT );
-  QgsDateTimeFieldFormatter::DATE_FORMAT = dateFormat;
-}
-
 QString QgsDateTimeFieldFormatter::defaultFormat( QVariant::Type type )
 {
   switch ( type )
@@ -117,3 +110,10 @@ QString QgsDateTimeFieldFormatter::defaultFormat( QVariant::Type type )
       return QgsDateTimeFieldFormatter::DATE_FORMAT;
   }
 }
+
+void QgsDateTimeFieldFormatter::applyLocaleChange()
+{
+  QString dateFormat = QLocale().dateFormat( QLocale::FormatType::ShortFormat );
+  QgsDateTimeFieldFormatter::DATETIME_FORMAT = QString( "%1 %2" ).arg( dateFormat, QgsDateTimeFieldFormatter::TIME_FORMAT );
+  QgsDateTimeFieldFormatter::DATE_FORMAT = dateFormat;
+}

src/core/fieldformatter/qgsdatetimefieldformatter.h

@@ -46,9 +46,6 @@ class CORE_EXPORT QgsDateTimeFieldFormatter : public QgsFieldFormatter
 
     QString representValue( QgsVectorLayer *layer, int fieldIndex, const QVariantMap &config, const QVariant &cache, const QVariant &value ) const override;
 
-    //! Adjusts the date time formats according to locale.
-    static void applyLocaleChange();
-
     /**
      * Gets the default format in function of the type.
      * The type is expected to be one of
@@ -58,6 +55,13 @@ class CORE_EXPORT QgsDateTimeFieldFormatter : public QgsFieldFormatter
      * - QVariant::Time
      */
     static QString defaultFormat( QVariant::Type type );
+
+    /**
+     * Adjusts the date time formats according to locale.
+     *
+     * \since QGIS 3.22.2
+     */
+    static void applyLocaleChange(); SIP_SKIP;
 };
 
 #endif // QGSDATETIMEFIELDKIT_H

src/core/qgsapplication.cpp

@@ -85,6 +85,7 @@
 
 #include "layout/qgspagesizeregistry.h"
 #include "qgsrecentstylehandler.h"
+#include "qgsdatetimefieldformatter.h"
 
 #if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
 #include <QDesktopWidget>
@@ -230,6 +231,8 @@ QgsApplication::QgsApplication( int &argc, char **argv, bool GUIenabled, const Q
   mApplicationMembers = new ApplicationMembers();
 
   *sProfilePath() = profileFolder;
+
+  connect( instance(), &QgsApplication::localeChanged, &QgsDateTimeFieldFormatter::applyLocaleChange );
 }
 
 void QgsApplication::init( QString profileFolder )
@@ -1311,6 +1314,12 @@ QString QgsApplication::locale()
   }
 }
 
+void QgsApplication::setLocale( const QLocale &locale )
+{
+  QLocale::setDefault( locale );
+  emit instance()->localeChanged();
+}
+
 QString QgsApplication::userThemesFolder()
 {
   return qgisSettingsDirPath() + QStringLiteral( "/themes" );

src/core/qgsapplication.h

@@ -468,6 +468,14 @@ class CORE_EXPORT QgsApplication : public QApplication
      */
     static QString locale();
 
+    /**
+     * Sets the QGIS locale - used mainly by 3rd party apps and tests.
+     * In QGIS this is internally triggered by the application in startup.
+     *
+     * \since QGIS 3.22.2
+     */
+    static void setLocale( const QLocale &locale );
+
     //! Returns the path to user's themes folder
     static QString userThemesFolder();
 
@@ -1043,6 +1051,15 @@ class CORE_EXPORT QgsApplication : public QApplication
      */
     void requestForTranslatableObjects( QgsTranslationContext *translationContext );
 
+
+    /**
+     * Emitted when project locale has been changed.
+     *
+     * \since QGIS 3.22.2
+     */
+    void localeChanged();
+
+
   private:
 
     static void copyPath( const QString &src, const QString &dst );

tests/src/python/test_qgsfieldformatters.py

@@ -24,6 +24,7 @@ from qgis.PyQt.QtCore import (
     Qt
 )
 from qgis.core import (
+    QgsApplication,
     QgsFeature,
     QgsProject,
     QgsRelation,
@@ -679,7 +680,7 @@ class TestQgsDateTimeFieldFormatter(unittest.TestCase):
     @classmethod
     def tearDownClass(cls):
         """Reset locale"""
-        QLocale.setDefault(QLocale(QLocale.English))
+        QgsApplication.setLocale(QLocale(QLocale.English))
 
     def test_representValue(self):
         layer = QgsVectorLayer("point?field=datetime:datetime&field=date:date&field=time:time",
@@ -716,8 +717,7 @@ class TestQgsDateTimeFieldFormatter(unittest.TestCase):
         }
 
         for locale, assertions in locale_assertions.items():
-            QLocale().setDefault(locale)
+            QgsApplication.setLocale(locale)
-            QgsDateTimeFieldFormatter.applyLocaleChange()
             field_formatter = QgsDateTimeFieldFormatter()
 
             self.assertEqual(field_formatter.defaultFormat(QVariant.Date), assertions["date_format"], locale.name())