Implement delete field action

python/core/qgsauxiliarystorage.sip

@@ -151,6 +151,17 @@ class QgsAuxiliaryLayer : QgsVectorLayer
  :rtype: bool
 %End
 
+    virtual bool deleteAttribute( int attr );
+%Docstring
+ Remove attribute from the layer and commit changes. The layer remains
+ editable.
+
+ \param attr The index of the attribute to remove
+
+ :return: true if the attribute is well deleted, false otherwise
+ :rtype: bool
+%End
+
 };
 
 

python/core/qgsproperty.sip

@@ -104,12 +104,22 @@ class QgsPropertyDefinition
  :rtype: str
 %End
 
+    void setName( const QString &name );
+%Docstring
+ Sets the name of the property
+%End
+
     Origin origin() const;
 %Docstring
  Returns the origin of the property
  :rtype: Origin
 %End
 
+    void setOrigin( Origin origin );
+%Docstring
+ Sets origin of the property
+%End
+
     QString description() const;
 %Docstring
  Descriptive name of the property.

python/core/qgsvectorlayer.sip

@@ -1302,7 +1302,7 @@ Returns a map of field name to attribute alias
  A set of attributes that are not advertised in WFS requests with QGIS server.
 %End
 
-    bool deleteAttribute( int attr );
+    virtual bool deleteAttribute( int attr );
 %Docstring
 Delete an attribute field (but does not commit it)
  :rtype: bool

src/app/qgsvectorlayerproperties.cpp

@@ -87,6 +87,7 @@ QgsVectorLayerProperties::QgsVectorLayerProperties(
   , mAuxiliaryLayerActionClear( nullptr )
   , mAuxiliaryLayerActionDelete( nullptr )
   , mAuxiliaryLayerActionExport( nullptr )
+  , mAuxiliaryLayerActionDeleteField( nullptr )
 {
   setupUi( this );
   connect( mLayerOrigNameLineEdit, &QLineEdit::textEdited, this, &QgsVectorLayerProperties::mLayerOrigNameLineEdit_textEdited );
@@ -378,6 +379,8 @@ QgsVectorLayerProperties::QgsVectorLayerProperties(
 
   mAuxiliaryStorageActions->setMenu( menu );
 
+  connect( mAuxiliaryStorageFieldsDeleteBtn, &QPushButton::clicked, this, &QgsVectorLayerProperties::onAuxiliaryLayerDeleteField );
+
   updateAuxiliaryStoragePage();
 }
 
@@ -1631,3 +1634,48 @@ void QgsVectorLayerProperties::onAuxiliaryLayerExport()
 
   QgisApp::instance()->saveAsFile( clone.get() );
 }
+
+void QgsVectorLayerProperties::onAuxiliaryLayerDeleteField()
+{
+  QgsAuxiliaryLayer *alayer = mLayer->auxiliaryLayer();
+  if ( !alayer )
+    return;
+
+  QList<QTreeWidgetItem *> items = mAuxiliaryStorageFieldsTree->selectedItems();
+  if ( items.count() < 1 )
+    return;
+
+  // get auxiliary field name and index from item
+  const QTreeWidgetItem *item = items[0];
+  QgsPropertyDefinition def;
+
+  if ( item->text( 0 ).compare( "pal", Qt::CaseInsensitive ) == 0 )
+    def.setOrigin( QgsPropertyDefinition::Pal );
+  else
+    def.setOrigin( QgsPropertyDefinition::Diagram );
+
+  def.setName( item->text( 1 ) );
+
+  const QString fieldName = QgsAuxiliaryField::name( def );
+
+  const int index = mLayer->auxiliaryLayer()->fields().indexOf( fieldName );
+  if ( index < 0 )
+    return;
+
+  // should be only 1 field
+  const QString msg = tr( "Are you sure you want to delete auxiliary field %1 for %2" ).arg( item->text( 1 ), item->text( 0 ) );
+
+  QMessageBox::StandardButton reply;
+  reply = QMessageBox::question( this, "Delete auxiliary field", msg, QMessageBox::Yes | QMessageBox::No );
+
+  if ( reply == QMessageBox::Yes )
+  {
+    QApplication::setOverrideCursor( Qt::WaitCursor );
+    mLayer->auxiliaryLayer()->deleteAttribute( index );
+    QApplication::restoreOverrideCursor();
+    mLayer->updateFields();
+    updateAuxiliaryStoragePage( true );
+    mFieldsPropertiesDialog->init();
+    mLayer->triggerRepaint();
+  }
+}

src/app/qgsvectorlayerproperties.h

@@ -162,6 +162,8 @@ class APP_EXPORT QgsVectorLayerProperties : public QgsOptionsDialogBase, private
 
     void onAuxiliaryLayerDelete();
 
+    void onAuxiliaryLayerDeleteField();
+
     void onAuxiliaryLayerExport();
 
   private:
@@ -231,6 +233,7 @@ class APP_EXPORT QgsVectorLayerProperties : public QgsOptionsDialogBase, private
     QAction *mAuxiliaryLayerActionClear;
     QAction *mAuxiliaryLayerActionDelete;
     QAction *mAuxiliaryLayerActionExport;
+    QAction *mAuxiliaryLayerActionDeleteField;
 
   private slots:
     void openPanel( QgsPanelWidget *panel );

src/core/qgsauxiliarystorage.cpp

@@ -233,6 +233,14 @@ QgsAuxiliaryFields QgsAuxiliaryLayer::auxiliaryFields() const
   return afields;
 }
 
+bool QgsAuxiliaryLayer::deleteAttribute( int attr )
+{
+  QgsVectorLayer::deleteAttribute( attr );
+  bool rc = commitChanges();
+  startEditing();
+  return rc;
+}
+
 bool QgsAuxiliaryLayer::save()
 {
   bool rc = false;

src/core/qgsauxiliarystorage.h

@@ -174,6 +174,16 @@ class CORE_EXPORT QgsAuxiliaryLayer : public QgsVectorLayer
      */
     bool save();
 
+    /**
+     * Remove attribute from the layer and commit changes. The layer remains
+     * editable.
+     *
+     * \param attr The index of the attribute to remove
+     *
+     * \returns true if the attribute is well deleted, false otherwise
+     */
+    virtual bool deleteAttribute( int attr ) override;
+
   private:
     QgsVectorLayerJoinInfo mJoinInfo;
     const QgsVectorLayer *mLayer;

src/core/qgsproperty.h

@@ -141,11 +141,21 @@ class CORE_EXPORT QgsPropertyDefinition
      */
     QString name() const { return mName; }
 
+    /**
+     * Sets the name of the property
+     */
+    void setName( const QString &name ) { mName = name; }
+
     /**
      * Returns the origin of the property
      */
     Origin origin() const { return mOrigin; }
 
+    /**
+     * Sets origin of the property
+     */
+    void setOrigin( Origin origin ) { mOrigin = origin; }
+
     /**
      * Descriptive name of the property.
      */

src/core/qgsvectorlayer.h

@@ -1302,7 +1302,7 @@ class CORE_EXPORT QgsVectorLayer : public QgsMapLayer, public QgsExpressionConte
     void setExcludeAttributesWfs( const QSet<QString> &att ) { mExcludeAttributesWFS = att; }
 
     //! Delete an attribute field (but does not commit it)
-    bool deleteAttribute( int attr );
+    virtual bool deleteAttribute( int attr );
 
     /**
      * Deletes a list of attribute fields (but does not commit it)