Allow usage of search query builder with no layer, fixed python binding

git-svn-id: http://svn.osgeo.org/qgis/trunk@14869 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

python/gui/qgssearchquerybuilder.sip

@@ -5,7 +5,7 @@ class QgsSearchQueryBuilder : QDialog
 %End
 
   public:
-    QgsSearchQueryBuilder( QgsVectorLayer* layer, QWidget *parent = 0, Qt::WFlags fl = QgisGui::ModalDialogFlags );
+    QgsSearchQueryBuilder( QgsVectorLayer* layer, QWidget *parent /TransferThis/ = 0, Qt::WFlags fl = QgisGui::ModalDialogFlags );
     ~QgsSearchQueryBuilder();
 
     //! returns newly created search string

src/gui/qgssearchquerybuilder.cpp

@@ -60,7 +60,8 @@ QgsSearchQueryBuilder::QgsSearchQueryBuilder( QgsVectorLayer* layer,
   pbn->setToolTip( tr( "Load query from xml file" ) );
   connect( pbn, SIGNAL( clicked() ), this, SLOT( loadQuery() ) );
 
-  lblDataUri->setText( layer->name() );
+  if ( layer )
+    lblDataUri->setText( layer->name() );
   populateFields();
 }
 
@@ -71,6 +72,9 @@ QgsSearchQueryBuilder::~QgsSearchQueryBuilder()
 
 void QgsSearchQueryBuilder::populateFields()
 {
+  if ( !mLayer )
+    return;
+
   QgsDebugMsg( "entering." );
   QRegExp reQuote( "[A-Za-z_][A-Za-z0-9_]*" );
   const QgsFieldMap& fields = mLayer->pendingFields();
@@ -195,6 +199,9 @@ long QgsSearchQueryBuilder::countRecords( QString searchString )
     return -1;
   }
 
+  if ( !mLayer )
+    return -1;
+
   QgsSearchTreeNode* searchTree = search.tree();
   if ( searchTree == NULL )
   {