expression builder widget: hide sample buttons and context menu, when…

… no layer is set (fixes #6802)

wfs source select: rename slots to avoid autoconnect warning
attribute table: remove stale connect

resources/function_help/Field

@@ -2,3 +2,8 @@
 Double click to add field name to expression string.
 <br><br>
 Right-Click on field name to open context menu sample value loading options.
+
+<p><h4>Note:</h4>
+Loading field values from WFS layers isn't supported, before the layer is
+actually inserted, ie. when building queries.
+</p>

resources/function_help/Fields and Values

@@ -3,3 +3,7 @@ Contains a list of fields from the layer.  Sample values can also be accessed vi
 <br><br>
 Select the field name from the list then right-click to access context menu with options to load sample values from the selected field.
 
+<p><h4>Note:</h4>
+Loading field values from WFS layers isn't supported, before the layer is
+actually inserted, ie. when building queries.
+</p>

src/app/qgsattributetabledialog.cpp

@@ -119,8 +119,6 @@ QgsAttributeTableDialog::QgsAttributeTableDialog( QgsVectorLayer *theLayer, QWid
   // info from table to application
   connect( this, SIGNAL( saveEdits( QgsMapLayer * ) ), QgisApp::instance(), SLOT( saveEdits( QgsMapLayer * ) ) );
 
-  connect( mMainView, SIGNAL( currentChanged( int ) ), mMainViewButtonGroup, SLOT( currentChanged( int ) ) );
-
   bool myDockFlag = settings.value( "/qgis/dockAttributeTable", false ).toBool();
   if ( myDockFlag )
   {

src/gui/qgsexpressionbuilderdialog.cpp

@@ -21,8 +21,8 @@ QgsExpressionBuilderDialog::QgsExpressionBuilderDialog( QgsVectorLayer* layer, Q
 {
   setupUi( this );
 
-  QPushButton* okButuon = buttonBox->button( QDialogButtonBox::Ok );
-  connect( builder, SIGNAL( expressionParsed( bool ) ), okButuon, SLOT( setEnabled( bool ) ) );
+  QPushButton* okButton = buttonBox->button( QDialogButtonBox::Ok );
+  connect( builder, SIGNAL( expressionParsed( bool ) ), okButton, SLOT( setEnabled( bool ) ) );
 
   builder->setLayer( layer );
   builder->setExpressionText( startText );

src/gui/qgsexpressionbuilderwidget.cpp

@@ -125,17 +125,17 @@ void QgsExpressionBuilderWidget::currentChanged( const QModelIndex &index, const
   // Get the item
   QModelIndex idx = mProxyModel->mapToSource( index );
   QgsExpressionItem* item = dynamic_cast<QgsExpressionItem*>( mModel->itemFromIndex( idx ) );
-  if ( item == 0 )
+  if ( !item )
     return;
 
   if ( item->getItemType() != QgsExpressionItem::Field )
   {
     mValueListWidget->clear();
   }
 
-  btnLoadAll->setVisible( item->getItemType() == QgsExpressionItem::Field );
-  btnLoadSample->setVisible( item->getItemType() == QgsExpressionItem::Field );
-  mValueGroupBox->setVisible( item->getItemType() == QgsExpressionItem::Field );
+  btnLoadAll->setVisible( item->getItemType() == QgsExpressionItem::Field && mLayer );
+  btnLoadSample->setVisible( item->getItemType() == QgsExpressionItem::Field && mLayer );
+  mValueGroupBox->setVisible( item->getItemType() == QgsExpressionItem::Field && mLayer );
 
   // Show the help for the current item.
   QString help = loadFunctionHelp( item );
@@ -369,7 +369,7 @@ void QgsExpressionBuilderWidget::showContextMenu( const QPoint & pt )
   if ( !item )
     return;
 
-  if ( item->getItemType() == QgsExpressionItem::Field )
+  if ( item->getItemType() == QgsExpressionItem::Field && mLayer )
   {
     QMenu* menu = new QMenu( this );
     menu->addAction( tr( "Load top 10 unique values" ), this, SLOT( loadSampleValues() ) );

src/providers/wfs/qgswfssourceselect.cpp

@@ -61,7 +61,7 @@ QgsWFSSourceSelect::QgsWFSSourceSelect( QWidget* parent, Qt::WFlags fl, bool emb
   connect( mAddButton, SIGNAL( clicked() ), this, SLOT( addLayer() ) );
 
   buttonBox->addButton( mBuildQueryButton, QDialogButtonBox::ActionRole );
-  connect( mBuildQueryButton, SIGNAL( clicked() ), this, SLOT( on_mBuildQueryButton_clicked() ) );
+  connect( mBuildQueryButton, SIGNAL( clicked() ), this, SLOT( buildQueryButtonClicked() ) );
 
   connect( buttonBox, SIGNAL( rejected() ), this, SLOT( reject() ) );
   connect( btnNew, SIGNAL( clicked() ), this, SLOT( addEntryToServerList() ) );
@@ -94,8 +94,8 @@ QgsWFSSourceSelect::QgsWFSSourceSelect( QWidget* parent, Qt::WFlags fl, bool emb
   mModelProxy->setSortCaseSensitivity( Qt::CaseInsensitive );
   treeView->setModel( mModelProxy );
 
-  connect( treeView, SIGNAL( doubleClicked( const QModelIndex& ) ), this, SLOT( on_treeWidget_itemDoubleClicked( const QModelIndex& ) ) );
-  connect( treeView->selectionModel(), SIGNAL( currentRowChanged( QModelIndex, QModelIndex ) ), this, SLOT( on_treeWidget_currentRowChanged( const QModelIndex&, const QModelIndex& ) ) );
+  connect( treeView, SIGNAL( doubleClicked( const QModelIndex& ) ), this, SLOT( treeWidgetItemDoubleClicked( const QModelIndex& ) ) );
+  connect( treeView->selectionModel(), SIGNAL( currentRowChanged( QModelIndex, QModelIndex ) ), this, SLOT( treeWidgetCurrentRowChanged( const QModelIndex&, const QModelIndex& ) ) );
 }
 
 QgsWFSSourceSelect::~QgsWFSSourceSelect()
@@ -519,13 +519,13 @@ void QgsWFSSourceSelect::on_btnLoad_clicked()
   emit connectionsChanged();
 }
 
-void QgsWFSSourceSelect::on_treeWidget_itemDoubleClicked( const QModelIndex& index )
+void QgsWFSSourceSelect::treeWidgetItemDoubleClicked( const QModelIndex& index )
 {
   QgsDebugMsg( "double click called" );
   buildQuery( index );
 }
 
-void QgsWFSSourceSelect::on_treeWidget_currentRowChanged( const QModelIndex & current, const QModelIndex & previous )
+void QgsWFSSourceSelect::treeWidgetCurrentRowChanged( const QModelIndex & current, const QModelIndex & previous )
 {
   Q_UNUSED( previous )
   QgsDebugMsg( "treeWidget_currentRowChanged called" );
@@ -534,7 +534,7 @@ void QgsWFSSourceSelect::on_treeWidget_currentRowChanged( const QModelIndex & cu
   mAddButton->setEnabled( current.isValid() );
 }
 
-void QgsWFSSourceSelect::on_mBuildQueryButton_clicked()
+void QgsWFSSourceSelect::buildQueryButtonClicked()
 {
   QgsDebugMsg( "mBuildQueryButton click called" );
   buildQuery( treeView->selectionModel()->currentIndex() );

src/providers/wfs/qgswfssourceselect.h

@@ -91,9 +91,9 @@ class QgsWFSSourceSelect: public QDialog, private Ui::QgsWFSSourceSelectBase
     void capabilitiesReplyFinished();
     void on_btnSave_clicked();
     void on_btnLoad_clicked();
-    void on_treeWidget_itemDoubleClicked( const QModelIndex & index );
-    void on_treeWidget_currentRowChanged( const QModelIndex & current, const QModelIndex & previous );
-    void on_mBuildQueryButton_clicked();
+    void treeWidgetItemDoubleClicked( const QModelIndex & index );
+    void treeWidgetCurrentRowChanged( const QModelIndex & current, const QModelIndex & previous );
+    void buildQueryButtonClicked();
     void filterChanged( QString text );
 
     void on_buttonBox_helpRequested() { QgsContextHelp::run( metaObject()->className() ); }