Commited patch for #3263 with small modifications

git-svn-id: http://svn.osgeo.org/qgis/trunk@15766 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/app/legend/qgslegend.cpp

@@ -151,14 +151,20 @@ void QgsLegend::handleCurrentItemChanged( QTreeWidgetItem* current, QTreeWidgetI
   emit currentLayerChanged( layer );
 }
 
+int QgsLegend::addGroupToCurrentItem( QString name, bool expand )
+{
+  QTreeWidgetItem *parent = currentItem();
+  return addGroup( name, expand, parent );
+}
+
 int QgsLegend::addGroup( QString name, bool expand, QTreeWidgetItem* parent )
 {
   if ( name.isEmpty() )
     name = tr( "group" ); // some default name if none specified
 
   QgsLegendGroup *parentGroup = dynamic_cast<QgsLegendGroup *>( parent );
-
   QgsLegendGroup *group;
+
   if ( parentGroup )
     group = new QgsLegendGroup( parentGroup, name );
   else
@@ -577,7 +583,7 @@ void QgsLegend::handleRightClickEvent( QTreeWidgetItem* item, const QPoint& posi
     }
   }
 
-  theMenu.addAction( QgisApp::getThemeIcon( "/folder_new.png" ), tr( "&Add group" ), this, SLOT( addGroup() ) );
+  theMenu.addAction( QgisApp::getThemeIcon( "/folder_new.png" ), tr( "&Add group" ), this, SLOT( addGroupToCurrentItem() ) );
   theMenu.addAction( QgisApp::getThemeIcon( "/mActionExpandTree.png" ), tr( "&Expand all" ), this, SLOT( expandAll() ) );
   theMenu.addAction( QgisApp::getThemeIcon( "/mActionCollapseTree.png" ), tr( "&Collapse all" ), this, SLOT( collapseAll() ) );
 

src/app/legend/qgslegend.h

@@ -220,10 +220,20 @@ class QgsLegend : public QTreeWidget
 
     /*!
      * Slot called when user wishes to add a new empty layer group to the legend.
+     * If a the legend has a currentItem() then the new group will be nested into it
      * The user will be prompted for the name of the newly added group.
      * @param name name of the new group
      * @param expand expand the group
-     * @return void
+     * @return index of inserted group
+     */
+    int addGroupToCurrentItem( QString name = QString(), bool expand = true );
+
+    /*!
+     * Slot called when user wishes to add a new empty layer group to the legend.
+     * The user will be prompted for the name of the newly added group.
+     * @param name name of the new group
+     * @param expand expand the group
+     * @return index of inserted group
      */
     int addGroup( QString name = QString(), bool expand = true, QTreeWidgetItem* parent = 0 );
 
@@ -414,7 +424,7 @@ class QgsLegend : public QTreeWidget
 
     /**Pointer to the main canvas. Used for requiring repaints in case of legend changes*/
     QgsMapCanvas* mMapCanvas;
-    
+
     /**Stores the width values of the LegendSymbologyItem pixmaps. The purpose of this is that the legend may automatically change
      the global IconWidth when items are added or removed*/
     std::multiset<int> mPixmapWidthValues;