Add preview for locale settings

Author: elpaso

src/app/qgsoptions.cpp

@@ -96,6 +96,8 @@ QgsOptions::QgsOptions( QWidget *parent, Qt::WindowFlags fl, const QList<QgsOpti
   connect( mCustomVariablesChkBx, &QCheckBox::toggled, this, &QgsOptions::mCustomVariablesChkBx_toggled );
   connect( mCurrentVariablesQGISChxBx, &QCheckBox::toggled, this, &QgsOptions::mCurrentVariablesQGISChxBx_toggled );
   connect( buttonBox, &QDialogButtonBox::helpRequested, this, &QgsOptions::showHelp );
+  connect( cboGlobalLocale, static_cast<void ( QComboBox::* )( int )>( &QComboBox::currentIndexChanged ), [ = ]( int ) { updateSampleLocaleText( ); } );
+  connect( cbOmitGroupSeparator, &QCheckBox::toggled, this, [ = ]( bool ) { updateSampleLocaleText(); } );
 
   // QgsOptionsDialogBase handles saving/restoring of geometry, splitter and current tab states,
   // switching vertical tabs between icon/text to icon-only modes (splitter collapsed to left),
@@ -2365,6 +2367,24 @@ void QgsOptions::refreshSchemeComboBox()
   mColorSchemesComboBox->blockSignals( false );
 }
 
+void QgsOptions::updateSampleLocaleText()
+{
+  QLocale locale( cboGlobalLocale->currentData( ).toString() );
+  if ( cbOmitGroupSeparator->isChecked( ) )
+  {
+    locale.setNumberOptions( locale.numberOptions() |= QLocale::NumberOption::OmitGroupSeparator );
+  }
+  else
+  {
+    locale.setNumberOptions( locale.numberOptions() &= ! QLocale::NumberOption::OmitGroupSeparator );
+  }
+  lblLocaleSample->setText( tr( "Sample date: %1 money: %2 int: %3 float: %4" ).arg(
+                              QDate::currentDate().toString( locale.dateFormat( QLocale::FormatType::ShortFormat ) ),
+                              locale.toCurrencyString( 1000.00 ),
+                              locale.toString( 1000 ),
+                              locale.toString( 1000.00, 'f', 2 ) ) );
+}
+
 void QgsOptions::updateActionsForCurrentColorScheme( QgsColorScheme *scheme )
 {
   if ( !scheme )

src/app/qgsoptions.h

@@ -255,6 +255,8 @@ class APP_EXPORT QgsOptions : public QgsOptionsDialogBase, private Ui::QgsOption
 
     void refreshSchemeComboBox();
 
+    void updateSampleLocaleText();
+
   protected:
     QgisAppStyleSheet *mStyleSheetBuilder = nullptr;
     QMap<QString, QVariant> mStyleSheetNewOpts;

src/ui/qgsoptionsbase.ui

@@ -350,7 +350,7 @@
                 <x>0</x>
                 <y>0</y>
                 <width>843</width>
-                <height>855</height>
+                <height>885</height>
                </rect>
               </property>
               <layout class="QVBoxLayout" name="verticalLayout_28">
@@ -381,7 +381,7 @@
                     <item row="2" column="0">
                      <widget class="QLabel" name="label_52">
                       <property name="text">
-                       <string>Locale (affects numbers representation)</string>
+                       <string>Locale (numbers, date and currency formats)</string>
                       </property>
                      </widget>
                     </item>
@@ -417,6 +417,16 @@
                     </property>
                    </widget>
                   </item>
+                  <item>
+                   <widget class="QLabel" name="lblLocaleSample">
+                    <property name="styleSheet">
+                     <string notr="true">QLabel {background-color: #ffffff; }</string>
+                    </property>
+                    <property name="text">
+                     <string>Sample text for locale formatting</string>
+                    </property>
+                   </widget>
+                  </item>
                  </layout>
                 </widget>
                </item>
@@ -1061,7 +1071,7 @@
                 <x>0</x>
                 <y>0</y>
                 <width>544</width>
-                <height>1096</height>
+                <height>1094</height>
                </rect>
               </property>
               <layout class="QVBoxLayout" name="verticalLayout_22">
@@ -3194,7 +3204,7 @@
                 <x>0</x>
                 <y>0</y>
                 <width>613</width>
-                <height>646</height>
+                <height>636</height>
                </rect>
               </property>
               <layout class="QVBoxLayout" name="verticalLayout_30">