Add epsg_nr to datum transform table

Author: mhugent

resources/srs.db

@@ -2032,7 +2032,7 @@ bool QgsCoordinateReferenceSystem::syncDatumTransform( const QString& dbPath )
     {
       //not yet in database, do insert
       QgsDebugMsg( "Trying datum transform insert" );
-      sql = QString( "INSERT INTO tbl_datum_transform ( coord_op_code, source_crs_code, target_crs_code, coord_op_method_code, p1, p2, p3, p4, p5, p6, p7 ) VALUES ( %1, %2, %3, %4, %5, %6, %7, %8, %9, %10, %11 )" )
+      sql = QString( "INSERT INTO tbl_datum_transform ( epsg_nr, coord_op_code, source_crs_code, target_crs_code, coord_op_method_code, p1, p2, p3, p4, p5, p6, p7 ) VALUES ( %1, %1, %2, %3, %4, %5, %6, %7, %8, %9, %10, %11 )" )
             .arg( coord_op ).arg( source_crs ).arg( target_crs ).arg( coord_op_method ).arg( p1 ).arg( p2 ).arg( p3 ).arg( p4 ).arg( p5 ).arg( p6 ).arg( p7 );
 
     }

src/core/qgscoordinatereferencesystem.cpp

@@ -932,7 +932,7 @@ QString QgsCoordinateTransform::datumTransformString( int datumTransform )
   return transformString;
 }
 
-bool QgsCoordinateTransform::datumTransformCrsInfo( int datumTransform, QString& srcProjection, QString& dstProjection )
+bool QgsCoordinateTransform::datumTransformCrsInfo( int datumTransform, int& epsgNr, QString& srcProjection, QString& dstProjection )
 {
   sqlite3* db;
   int openResult = sqlite3_open( QgsApplication::srsDbFilePath().toUtf8().constData(), &db );
@@ -943,7 +943,7 @@ bool QgsCoordinateTransform::datumTransformCrsInfo( int datumTransform, QString&
   }
 
   sqlite3_stmt* stmt;
-  QString sql = QString( "SELECT source_crs_code, target_crs_code FROM tbl_datum_transform WHERE coord_op_code = %1" ).arg( datumTransform );
+  QString sql = QString( "SELECT epsg_nr, source_crs_code, target_crs_code FROM tbl_datum_transform WHERE coord_op_code = %1" ).arg( datumTransform );
   int prepareRes = sqlite3_prepare( db, sql.toAscii(), sql.size(), &stmt, NULL );
   if ( prepareRes != SQLITE_OK )
   {
@@ -954,8 +954,9 @@ bool QgsCoordinateTransform::datumTransformCrsInfo( int datumTransform, QString&
   int srcCrsId, destCrsId;
   if ( sqlite3_step( stmt ) == SQLITE_ROW )
   {
-    srcCrsId = sqlite3_column_int( stmt, 0 );
-    destCrsId = sqlite3_column_int( stmt, 1 );
+    epsgNr = sqlite3_column_int( stmt, 0 );
+    srcCrsId = sqlite3_column_int( stmt, 1 );
+    destCrsId = sqlite3_column_int( stmt, 2 );
   }
 
   QgsCoordinateReferenceSystem srcCrs;

src/core/qgscoordinatetransform.cpp

@@ -214,8 +214,9 @@ class CORE_EXPORT QgsCoordinateTransform : public QObject
     /**Returns list of datum transformations for the given src and dest CRS*/
     static QList< QList< int > > datumTransformations( const QgsCoordinateReferenceSystem& srcCRS, const QgsCoordinateReferenceSystem& destCRS );
     static QString datumTransformString( int datumTransform );
-    /**Gets name of source and dest geographical CRS (to show in a tooltip)*/
-    static bool datumTransformCrsInfo( int datumTransform, QString& srcProjection, QString& dstProjection );
+    /**Gets name of source and dest geographical CRS (to show in a tooltip)
+        @return epsgNr epsg code of the transformation (or 0 if not in epsg db)*/
+    static bool datumTransformCrsInfo( int datumTransform, int& epsgNr, QString& srcProjection, QString& dstProjection );
 
     int sourceDatumTransform() const { return mSourceDatumTransform; }
     void setSourceDatumTransform( int dt ) { mSourceDatumTransform = dt; }

src/core/qgscoordinatetransform.h

@@ -44,9 +44,15 @@ QgsDatumTransformDialog::QgsDatumTransformDialog( const QString& layerName, cons
 
         //Describe datums in a tooltip
         QString srcGeoProj, destGeoProj;
-        if ( QgsCoordinateTransform::datumTransformCrsInfo( nr, srcGeoProj, destGeoProj ) )
+        int epsgNr;
+        if ( QgsCoordinateTransform::datumTransformCrsInfo( nr, epsgNr, srcGeoProj, destGeoProj ) )
         {
-          QString toolTipString = QString( "EPSG Transformations Code: %1\nSource CRS: %2\nDestination CRS: %3" ).arg( nr ).arg( srcGeoProj ).arg( destGeoProj );
+          QString toolTipString;
+          if ( epsgNr > 0 )
+          {
+            toolTipString.append( QString( "EPSG Transformations Code: %1\n" ).arg( epsgNr ) );
+          }
+          toolTipString.append( QString( "Source CRS: %1\nDestination CRS: %2" ).arg( srcGeoProj ).arg( destGeoProj ) );
           item->setToolTip( i, toolTipString );
         }
       }