editor widgets: restore handling of null values in textedit widget (fixes #10497)

Author: jef-n

src/app/qgsfeatureaction.cpp

@@ -161,20 +161,22 @@ bool QgsFeatureAction::addFeature( const QgsAttributeMap& defaultAttributes )
   mFeature.initAttributes( fields.count() );
   for ( int idx = 0; idx < fields.count(); ++idx )
   {
+    QVariant v;
+
     if ( defaultAttributes.contains( idx ) )
     {
-      QgsDebugMsg( QString( "Using specified default %1 for %2" ).arg( defaultAttributes.value( idx ).toString() ).arg( idx ) );
-      mFeature.setAttribute( idx, defaultAttributes.value( idx ) );
+      v = defaultAttributes.value( idx );
     }
     else if ( reuseLastValues && sLastUsedValues.contains( mLayer ) && sLastUsedValues[ mLayer ].contains( idx ) )
     {
-      QgsDebugMsg( QString( "reusing %1 for %2" ).arg( sLastUsedValues[ mLayer ][idx].toString() ).arg( idx ) );
-      mFeature.setAttribute( idx, sLastUsedValues[ mLayer ][idx] );
+      v = sLastUsedValues[ mLayer ][idx];
     }
     else
     {
-      mFeature.setAttribute( idx, provider->defaultValue( idx ) );
+      v = provider->defaultValue( idx );
     }
+
+    mFeature.setAttribute( idx, v );
   }
 
   // show the dialog to enter attribute values

src/gui/editorwidgets/qgstexteditwidget.cpp

@@ -28,8 +28,7 @@ QgsTextEditWidget::QgsTextEditWidget( QgsVectorLayer* vl, int fieldIdx, QWidget*
 
 QVariant QgsTextEditWidget::value()
 {
-  QSettings settings;
-  QVariant v;
+  QString v;
 
   if ( mTextEdit && mTextEdit->document()->isModified() )
   {
@@ -53,12 +52,11 @@ QVariant QgsTextEditWidget::value()
     v = mLineEdit->text();
   }
 
-  if ( v.toString() == settings.value( "qgis/nullValue", "NULL" ).toString() )
-  {
-    v = QVariant( field().type() );
-  }
-
-  return v;
+  if (( v.isEmpty() && ( field().type() == QVariant::Int || field().type() == QVariant::Double || field().type() == QVariant::LongLong || field().type() == QVariant::Date ) ) ||
+      v == QSettings().value( "qgis/nullValue", "NULL" ).toString() )
+    return QVariant( field().type() );
+  else
+    return QVariant( v );
 }
 
 QWidget* QgsTextEditWidget::createWidget( QWidget* parent )
@@ -99,8 +97,7 @@ void QgsTextEditWidget::initWidget( QWidget* editor )
     QgsFilterLineEdit *fle = qobject_cast<QgsFilterLineEdit*>( mLineEdit );
     if ( fle && !( field().type() == QVariant::Int || field().type() == QVariant::Double || field().type() == QVariant::LongLong || field().type() == QVariant::Date ) )
     {
-      QSettings settings;
-      fle->setNullValue( settings.value( "qgis/nullValue", "NULL" ).toString() );
+      fle->setNullValue( QSettings().value( "qgis/nullValue", "NULL" ).toString() );
     }
 
     connect( mLineEdit, SIGNAL( textChanged( QString ) ), this, SLOT( valueChanged( QString ) ) );
@@ -109,17 +106,25 @@ void QgsTextEditWidget::initWidget( QWidget* editor )
 
 void QgsTextEditWidget::setValue( const QVariant& value )
 {
+  QString v;
+  if ( value.isNull() && !( field().type() == QVariant::Int || field().type() == QVariant::Double || field().type() == QVariant::LongLong || field().type() == QVariant::Date ) )
+  {
+    v = QSettings().value( "qgis/nullValue", "NULL" ).toString();
+  }
+  else
+    v = value.toString();
+
   if ( mTextEdit )
   {
     if ( config( "UseHtml" ).toBool() )
-      mTextEdit->setHtml( value.toString() );
+      mTextEdit->setHtml( v );
     else
-      mTextEdit->setPlainText( value.toString() );
+      mTextEdit->setPlainText( v );
   }
 
   if ( mPlainTextEdit )
-    mPlainTextEdit->setPlainText( value.toString() );
+    mPlainTextEdit->setPlainText( v );
 
   if ( mLineEdit )
-    mLineEdit->setText( value.toString() );
+    mLineEdit->setText( v );
 }