Don't double add features

Fix #10969

Author: m-kuhn

src/gui/qgsattributedialog.cpp

@@ -102,6 +102,7 @@ void QgsAttributeDialog::init( QgsVectorLayer* layer, QgsFeature* feature, QgsAt
   setLayout( new QGridLayout() );
   layout()->setMargin( 0 );
   mAttributeForm = new QgsAttributeForm( layer, *feature, context, parent );
+  mAttributeForm->disconnectButtonBox();
   layout()->addWidget( mAttributeForm );
   QDialogButtonBox* buttonBox = mAttributeForm->findChild<QDialogButtonBox*>();
   connect( buttonBox, SIGNAL( rejected() ), this, SLOT( reject() ) );

src/gui/qgsattributeform.cpp

@@ -65,7 +65,8 @@ void QgsAttributeForm::hideButtonBox()
   mButtonBox->hide();
 
   // Make sure that changes are taken into account if somebody tries to figure out if there have been some
-  connect( mLayer, SIGNAL( beforeModifiedCheck() ), this, SLOT( save() ) );
+  if ( !mIsAddDialog )
+    connect( mLayer, SIGNAL( beforeModifiedCheck() ), this, SLOT( save() ) );
 }
 
 void QgsAttributeForm::showButtonBox()
@@ -75,6 +76,12 @@ void QgsAttributeForm::showButtonBox()
   disconnect( mLayer, SIGNAL( beforeModifiedCheck() ), this, SLOT( save() ) );
 }
 
+void QgsAttributeForm::disconnectButtonBox()
+{
+  disconnect( mButtonBox, SIGNAL( accepted() ), this, SLOT( accept() ) );
+  disconnect( mButtonBox, SIGNAL( rejected() ), this, SLOT( resetValues() ) );
+}
+
 void QgsAttributeForm::addInterface( QgsAttributeFormInterface* iface )
 {
   mInterfaces.append( iface );

src/gui/qgsattributeform.h

@@ -46,6 +46,12 @@ class GUI_EXPORT QgsAttributeForm : public QWidget
      */
     void showButtonBox();
 
+    /**
+     * Disconnects the button box (Ok/Cancel) from the accept/resetValues slots
+     * If this method is called, you have to create these connections from outside
+     */
+    void disconnectButtonBox();
+
     /**
      * Takes ownership
      * @param iface