Fixes for const-correctness not propogated properly to sub-classes.

git-svn-id: http://svn.osgeo.org/qgis/trunk@2553 c8812cc2-4d05-0410-92ff-de0c093fc19c

providers/delimitedtext/qgsdelimitedtextprovider.cpp

@@ -725,7 +725,7 @@ bool QgsDelimitedTextProvider::boundsCheck(double x, double y)
   return inBounds;
 }
 
-bool QgsDelimitedTextProvider::supportsSaveAsShapefile()
+bool QgsDelimitedTextProvider::supportsSaveAsShapefile() const
 {
   return true;
 }

providers/delimitedtext/qgsdelimitedtextprovider.h

@@ -208,10 +208,11 @@ public:
 
   //! We support saving as shapefile - used to add item to the
   //  layers context menu
-  bool supportsSaveAsShapefile();
+  bool supportsSaveAsShapefile() const;
 
   //! Save the layer as a shapefile
   bool saveAsShapefile();
+
   QgsDataSourceURI *getURI()
   {
     return 0;

providers/gpx/qgsgpxprovider.h

@@ -150,9 +150,15 @@ public:
    */
   bool boundsCheck(double x, double y);
 
-  bool supportsFeatureAddition(){return true;}
+  bool supportsFeatureAddition() const 
+  { 
+      return true;
+  }
 
-  QgsDataSourceURI *getURI(){return 0;};
+  QgsDataSourceURI *getURI()
+  {
+      return 0;
+  }
   
  private:
   

providers/ogr/qgsshapefileprovider.h

@@ -140,8 +140,15 @@ class QgsShapeFileProvider:public QgsVectorDataProvider
     /**Writes a list of features to the file*/
     bool addFeatures(std::list<QgsFeature*> flist);
 
-    bool supportsFeatureAddition(){return true;}
-    QgsDataSourceURI * getURI(){ return 0;};
+    bool supportsFeatureAddition() const 
+    { 
+        return true;
+    }
+
+    QgsDataSourceURI * getURI()
+    { 
+        return 0;
+    }
 
   private:
     unsigned char *getGeometryPointer(OGRFeature * fet);

providers/postgres/qgspostgresprovider.cpp

@@ -1146,7 +1146,7 @@ bool QgsPostgresProvider::deleteFeatures(std::list<int> id)
     return returnvalue;
 }
 
-bool QgsPostgresProvider::supportsSaveAsShapefile()
+bool QgsPostgresProvider::supportsSaveAsShapefile() const
 {
   return false;
 }

providers/postgres/qgspostgresprovider.h

@@ -204,12 +204,14 @@ public:
        @return true in case of success and false in case of failure*/
   bool deleteFeatures(std::list<int> id);
 
-  bool supportsFeatureAddition(){return true;}
+  bool supportsFeatureAddition() const 
+  { return true; }
 
-  bool supportsFeatureDeletion(){return true;}
+  bool supportsFeatureDeletion() const 
+  {return true;}
 
   //! Flag to indicate if the provider can export to shapefile
-  bool supportsSaveAsShapefile();
+  bool supportsSaveAsShapefile() const;
 
   /** Accessor for sql where clause used to limit dataset */
   QString subsetString() {return sqlWhereClause;};