Added new edit type for attributes that are not recommended to change

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@10949 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

src/app/qgsattributedialog.cpp

@@ -238,10 +238,15 @@ QgsAttributeDialog::QgsAttributeDialog( QgsVectorLayer *vl, QgsFeature *thepFeat
 
       case QgsVectorLayer::LineEdit:
       case QgsVectorLayer::UniqueValuesEditable:
+      case QgsVectorLayer::Immutable:
       default:
       {
         QLineEdit *le = new QLineEdit( myFieldValue.toString() );
 
+        if ( editType == QgsVectorLayer::Immutable)
+        {
+          le->setEnabled(false);
+        }
         if ( editType == QgsVectorLayer::UniqueValuesEditable )
         {
           QList<QVariant> values;

src/app/qgsvectorlayerproperties.cpp

@@ -189,6 +189,7 @@ void QgsVectorLayerProperties::setRow( int row, int idx, const QgsField &field )
   cb->addItem( tr( "range (slider)" ), QgsVectorLayer::SliderRange );
   cb->addItem( tr( "file name" ), QgsVectorLayer::FileName );
   cb->addItem( tr( "enumeration" ), QgsVectorLayer::Enumeration);
+  cb->addItem( tr( "immutable" ), QgsVectorLayer::Immutable);
   cb->setSizeAdjustPolicy( QComboBox::AdjustToContentsOnFirstShow );
   cb->setCurrentIndex( layer->editType( idx ) );
 

src/core/qgsvectorlayer.h

@@ -74,7 +74,8 @@ class CORE_EXPORT QgsVectorLayer : public QgsMapLayer
       EditRange,
       SliderRange,
       FileName,
-      Enumeration
+      Enumeration,
+      Immutable /*The attribute value should not be changed in the attribute form*/
     };
 
     struct RangeData