Fix crash on add feature

Author: m-kuhn

src/app/qgsfeatureaction.cpp

@@ -33,7 +33,7 @@
 QgsFeatureAction::QgsFeatureAction( const QString &name, QgsFeature &f, QgsVectorLayer *layer, int action, int defaultAttr, QObject *parent )
     : QAction( name, parent )
     , mLayer( layer )
-    , mFeature( f )
+    , mFeature( &f )
     , mAction( action )
     , mIdx( defaultAttr )
     , mFeatureSaved( false )
@@ -42,12 +42,12 @@ QgsFeatureAction::QgsFeatureAction( const QString &name, QgsFeature &f, QgsVecto
 
 void QgsFeatureAction::execute()
 {
-  mLayer->actions()->doAction( mAction, mFeature, mIdx );
+  mLayer->actions()->doAction( mAction, *mFeature, mIdx );
 }
 
 QgsAttributeDialog *QgsFeatureAction::newDialog( bool cloneFeature )
 {
-  QgsFeature *f = cloneFeature ? new QgsFeature( mFeature ) : &mFeature;
+  QgsFeature *f = cloneFeature ? new QgsFeature( *mFeature ) : mFeature;
 
   QgsAttributeEditorContext context;
 
@@ -110,15 +110,15 @@ bool QgsFeatureAction::editFeature( bool showModal )
 
   QgsAttributeDialog *dialog = newDialog( false );
 
-  if ( !mFeature.isValid() )
+  if ( !mFeature->isValid() )
     dialog->setIsAddDialog( true );
 
   if ( showModal )
   {
     dialog->setAttribute( Qt::WA_DeleteOnClose );
     int rv = dialog->exec();
 
-    mFeature.setAttributes( dialog->feature()->attributes() );
+    mFeature->setAttributes( dialog->feature()->attributes() );
     return rv;
   }
   else
@@ -142,7 +142,7 @@ bool QgsFeatureAction::addFeature( const QgsAttributeMap& defaultAttributes, boo
 
   // add the fields to the QgsFeature
   const QgsFields& fields = mLayer->fields();
-  mFeature.initAttributes( fields.count() );
+  mFeature->initAttributes( fields.count() );
   for ( int idx = 0; idx < fields.count(); ++idx )
   {
     QVariant v;
@@ -160,7 +160,7 @@ bool QgsFeatureAction::addFeature( const QgsAttributeMap& defaultAttributes, boo
       v = provider->defaultValue( idx );
     }
 
-    mFeature.setAttribute( idx, v );
+    mFeature->setAttribute( idx, v );
   }
 
   //show the dialog to enter attribute values
@@ -182,7 +182,7 @@ bool QgsFeatureAction::addFeature( const QgsAttributeMap& defaultAttributes, boo
   if ( isDisabledAttributeValuesDlg )
   {
     mLayer->beginEditCommand( text() );
-    mFeatureSaved = mLayer->addFeature( mFeature );
+    mFeatureSaved = mLayer->addFeature( *mFeature );
 
     if ( mFeatureSaved )
       mLayer->endEditCommand();
@@ -201,6 +201,7 @@ bool QgsFeatureAction::addFeature( const QgsAttributeMap& defaultAttributes, boo
     {
       setParent( dialog ); // keep dialog until the dialog is closed and destructed
       dialog->show(); // will also delete the dialog on close (show() is overridden)
+      mFeature = 0;
       return true;
     }
 
@@ -219,7 +220,8 @@ void QgsFeatureAction::onFeatureSaved( const QgsFeature& feature )
   Q_ASSERT( form );
 
   // Assign provider generated values
-  mFeature = feature;
+  if ( mFeature )
+    *mFeature = feature;
 
   mFeatureSaved = true;
 

src/app/qgsfeatureaction.h

@@ -58,8 +58,8 @@ class APP_EXPORT QgsFeatureAction : public QAction
   private:
     QgsAttributeDialog *newDialog( bool cloneFeature );
 
-    QgsVectorLayer *mLayer;
-    QgsFeature &mFeature;
+    QgsVectorLayer* mLayer;
+    QgsFeature* mFeature;
     int mAction;
     int mIdx;