From 935e6b5e6541a66b7ee883b0e8c04f525c598406 Mon Sep 17 00:00:00 2001
From: mhugent <mhugent@c8812cc2-4d05-0410-92ff-de0c093fc19c>
Date: Thu, 16 Feb 2006 13:39:40 +0000
Subject: [PATCH] Tag 'classificationattribute' in project file for maplayer
 export

git-svn-id: http://svn.osgeo.org/qgis/trunk@4866 c8812cc2-4d05-0410-92ff-de0c093fc19c
---
 qgis.dtd                   |  2 +-
 src/gui/qgsvectorlayer.cpp | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/qgis.dtd b/qgis.dtd
index 2126eefcce8..f290d4f28bf 100644
--- a/qgis.dtd
+++ b/qgis.dtd
@@ -26,7 +26,7 @@
   --  General Map Layer Properties
   --  (apply to both vector and raster)
   -->
-<!ELEMENT maplayer (layername, datasource, (singlesymbol|singlemarker|graduatedsymbol|continuoussymbol|graduatedmarker|rasterproperties) >
+<!ELEMENT maplayer (layername, datasource, classificationattribute*, (singlesymbol|singlemarker|graduatedsymbol|continuoussymbol|graduatedmarker|rasterproperties) >
 <!ELEMENT layername (#PCDATA) >
 <!ELEMENT datasource (#PCDATA) >
 <!--  Attribute Lists -->
diff --git a/src/gui/qgsvectorlayer.cpp b/src/gui/qgsvectorlayer.cpp
index 73cc940ddc5..d11fea27ae5 100644
--- a/src/gui/qgsvectorlayer.cpp
+++ b/src/gui/qgsvectorlayer.cpp
@@ -2442,6 +2442,17 @@ bool QgsVectorLayer::setDataProvider( QString const & provider )
   encoding.appendChild( encodingText );
   layer_node.appendChild( encoding );
 
+  //classification field(s)
+  std::list<int> attributes=m_renderer->classificationAttributes();
+  const std::vector<QgsField> providerFields = dataProvider->fields();
+  for(std::list<int>::const_iterator it = attributes.begin(); it != attributes.end(); ++it)
+    {
+      QDomElement classificationElement = document.createElement("classificationattribute");
+      QDomText classificationText = document.createTextNode(providerFields[*it].name());
+      classificationElement.appendChild(classificationText);
+      layer_node.appendChild(classificationElement);
+    }
+
   // add the display field
 
   QDomElement dField  = document.createElement( "displayfield" );