add an update CRS cache function, still not effective though

Author: leyan

src/app/qgscustomprojectiondialog.cpp

@@ -24,6 +24,7 @@
 #include "qgsapplication.h"
 #include "qgslogger.h"
 #include "qgsgenericprojectionselector.h"
+#include "qgscrscache.h"
 
 //qt includes
 #include <QFileInfo>
@@ -291,6 +292,8 @@ bool QgsCustomProjectionDialog::saveCRS( QgsCoordinateReferenceSystem myCRS, QSt
   existingCRSparameters[myId] = myCRS.toProj4();
   existingCRSnames[myId] = myName;
 
+  QgsCRSCache::instance()->updateCRSCache( QString( "USER:%1" ).arg( myId ) );
+
   // If we have a projection acronym not in the user db previously, add it.
   // This is a must, or else we can't select it from the vw_srs table.
   // Actually, add it always and let the SQL PRIMARY KEY remove duplicates.

src/core/qgscrscache.cpp

@@ -77,6 +77,15 @@ QgsCRSCache::~QgsCRSCache()
   delete mInstance;
 }
 
+void QgsCRSCache::updateCRSCache( const QString& authid )
+{
+  QgsCoordinateReferenceSystem s;
+  if ( s.createFromOgcWmsCrs( authid ) )
+  {
+    mCRS.insert( authid, s );
+  }
+}
+
 const QgsCoordinateReferenceSystem& QgsCRSCache::crsByAuthId( const QString& authid )
 {
   QHash< QString, QgsCoordinateReferenceSystem >::const_iterator crsIt = mCRS.find( authid );

src/core/qgscrscache.h

@@ -49,6 +49,8 @@ class CORE_EXPORT QgsCRSCache
     const QgsCoordinateReferenceSystem& crsByAuthId( const QString& authid );
     const QgsCoordinateReferenceSystem& crsByEpsgId( long epsg );
 
+    void updateCRSCache( const QString &authid );
+
   protected:
     QgsCRSCache();