Bug fix from r6363 in 0.8.

git-svn-id: http://svn.osgeo.org/qgis/trunk@6364 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: homann

src/gui/qgscoordinatetransform.cpp

@@ -119,6 +119,7 @@ void QgsCoordinateTransform::initialise()
     // Pass through with no projection since we have no idea what the layer
     // coordinates are and projecting them may not be appropriate
     mShortCircuit = true;
+    QgsDebugMsg("SourceSRS deemed invalid!");
     return;
   }
 
@@ -130,22 +131,6 @@ void QgsCoordinateTransform::initialise()
     mDestSRS.createFromProj4(mSourceSRS.proj4String());
   }
 
-  //XXX todo overload == operator for QgsSpatialRefSys
-  //at the moment srs.parameters contains the whole proj def...soon it wont...
-  //if (mSourceSRS->proj4String() == mDestSRS->proj4String())
-  if (mSourceSRS == mDestSRS)
-  {
-    // If the source and destination projection are the same, set the short
-    // circuit flag (no transform takes place)
-    mShortCircuit=true;
-    return;
-  }
-  else
-  {
-    // Transform must take place
-    mShortCircuit=false;
-  }
-
   // init the projections (destination and source)
   mDestinationProjection = pj_init_plus(mDestSRS.proj4String());
   mSourceProjection = pj_init_plus(mSourceSRS.proj4String());
@@ -176,6 +161,23 @@ void QgsCoordinateTransform::initialise()
     QgsDebugMsg("------------------------------------------------------------");
   }
 #endif
+
+  //XXX todo overload == operator for QgsSpatialRefSys
+  //at the moment srs.parameters contains the whole proj def...soon it wont...
+  //if (mSourceSRS->proj4String() == mDestSRS->proj4String())
+  if (mSourceSRS == mDestSRS)
+  {
+    // If the source and destination projection are the same, set the short
+    // circuit flag (no transform takes place)
+    mShortCircuit=true;
+    QgsDebugMsg("Source/Dest SRS equal, shortcircuit is set.");
+  }
+  else
+  {
+    // Transform must take place
+    mShortCircuit=false;
+  }
+
 }
 
 //

src/gui/qgsmaplayer.cpp

@@ -260,6 +260,7 @@ bool QgsMapLayer::readXML( QDomNode & layer_node )
     QDomNode srsNode = layer_node.namedItem("coordinatetransform");
     if( ! srsNode.isNull()  )
     {
+      qDebug("Reading coordinatetransform from project file");
        mCoordinateTransform=new QgsCoordinateTransform();
        mCoordinateTransform->readXML(srsNode);
     }
@@ -268,7 +269,7 @@ bool QgsMapLayer::readXML( QDomNode & layer_node )
     QDomNode transparencyNode = layer_node.namedItem("transparencyLevelInt");
     if ( ! transparencyNode.isNull() )
     {
-      // set transparency level only if it's in project
+      // set transparency level only if it's in project 
       // (otherwise it sets the layer transparent)
       QDomElement myElement = transparencyNode.toElement();
       setTransparency(myElement.text().toInt());

src/gui/qgsprojectproperties.cpp

@@ -25,6 +25,7 @@
 #include "qgsmaplayerregistry.h"
 #include "qgsproject.h"
 #include "qgsrenderer.h"
+#include "qgslogger.h"
 
 //qt includes
 #include <QColorDialog>
@@ -61,6 +62,7 @@
   }
   // set the default wkt to WGS 84
   long mySRSID =  QgsProject::instance()->readNumEntry("SpatialRefSys","/ProjectSRSID",GEOSRS_ID);
+  QgsDebugMsg("Read project SRSID: " + QString::number(mySRSID));
   projectionSelector->setSelectedSRSID(mySRSID);
 
 

src/gui/qgsvectorlayer.cpp

@@ -3506,7 +3506,9 @@ void QgsVectorLayer::setCoordinateSystem()
   // project srs
 
   QgsDebugMsg("Layer registry has " + QString::number(QgsMapLayerRegistry::instance()->count()) + " layers ");
-  if (QgsMapLayerRegistry::instance()->count() ==0)
+  // No reason to set project SRS
+  // if (QgsMapLayerRegistry::instance()->count() ==0)
+  if (NULL)
   {
     mCoordinateTransform->destSRS().createFromProj4(
         mCoordinateTransform->sourceSRS().proj4String());

src/raster/qgsrasterlayer.cpp

@@ -491,7 +491,9 @@ void QgsRasterLayer::setupDestSrs()
 {
   QgsDebugMsg("Layer registry has " + QString::number(QgsMapLayerRegistry::instance()->count()) + "layers");
 
-  if (QgsMapLayerRegistry::instance()->count() ==0)
+  // No reason to set project SRS
+  //  if (QgsMapLayerRegistry::instance()->count() ==0)
+  if (NULL)
   {
     mCoordinateTransform->destSRS().createFromProj4(
            mCoordinateTransform->sourceSRS().proj4String());
@@ -551,22 +553,32 @@ QgsRasterLayer::readFile( QString const & fileName )
   QPixmap myPyramidPixmap(myThemePath + "/mIconPyramid.png");
   QPixmap myNoPyramidPixmap(myThemePath + "/mIconNoPyramid.png");
 
-  // Get the layer's projection info and set up the
-  // QgsCoordinateTransform for this layer
-  // NOTE: we must do this before getMetadata is called
-  mCoordinateTransform = new QgsCoordinateTransform();
-  QString mySourceWKT = getProjectionWKT();
 
-  QgsDebugMsg("--------------------------------------------------------------------------------------");
-  QgsDebugMsg("QgsRasterLayer::readFile --- using wkt\n" + mySourceWKT);
-  QgsDebugMsg("--------------------------------------------------------------------------------------");
-
-  mCoordinateTransform->sourceSRS().createFromWkt(mySourceWKT);
-  //get the project projection, defaulting to this layer's projection
-  //if none exists....
-  if (!mCoordinateTransform->sourceSRS().isValid())
+  if (mCoordinateTransform && mCoordinateTransform->sourceSRS().isValid())
+  {
+    // Layer source SRS is already set, probably by reading XML from project file
+    // This setting should override any GDAL info.
+    QgsDebugMsg("Source SRS is alerady set. Ignoring GDAL projection info");
+  }
+  else
   {
-    mCoordinateTransform->sourceSRS().validate();
+    // Get the layer's projection info and set up the
+    // QgsCoordinateTransform for this layer
+    // NOTE: we must do this before getMetadata is called
+    mCoordinateTransform = new QgsCoordinateTransform();
+    QString mySourceWKT = getProjectionWKT();
+
+    QgsDebugMsg("--------------------------------------------------------------------------------------");
+    QgsDebugMsg("QgsRasterLayer::readFile --- using wkt\n" + mySourceWKT);
+    QgsDebugMsg("--------------------------------------------------------------------------------------");
+
+    mCoordinateTransform->sourceSRS().createFromWkt(mySourceWKT);
+    //get the project projection, defaulting to this layer's projection
+    //if none exists....
+    if (!mCoordinateTransform->sourceSRS().isValid())
+    {
+      mCoordinateTransform->sourceSRS().validate();
+    }
   }
 
   setupDestSrs();
@@ -4527,6 +4539,8 @@ bool QgsRasterLayer::readXML_( QDomNode & layer_node )
   QgsDebugMsg("ReadXml: red band name " + redBandNameQString);
   QgsDebugMsg("ReadXml: green band name  " + greenBandNameQString);
   QgsDebugMsg("Drawing style " + getDrawingStyleAsQString());
+  QgsDebugMsg("Source SRS: " + mCoordinateTransform->sourceSRS().description());
+  QgsDebugMsg("Dest   SRS: " + mCoordinateTransform->destSRS().description());
 
   return true;