Loads of debug output. Shouldn't affect functionality

Author: homann

src/app/qgsmeasuredialog.cpp

@@ -118,6 +118,7 @@ void QgsMeasureDialog::mouseMove( QgsPoint &point )
     convertMeasurement( d, myDisplayUnits, false );
     QTreeWidgetItem *item = mTable->topLevelItem( mTable->topLevelItemCount() - 1 );
     item->setText( 0, QLocale::system().toString( d, 'f', decimalPlaces ) );
+    QgsDebugMsg( QString( "Final result is %1" ).arg( item->text( 0 ) ) );
   }
 }
 
@@ -257,18 +258,20 @@ void QgsMeasureDialog::convertMeasurement( double &measure, QGis::UnitType &u, b
   // The parameter &u is out only...
 
   QGis::UnitType myUnits = mTool->canvas()->mapUnits();
+  QgsDebugMsg( QString( "Canvas units are %1" ).arg( QgsDistanceArea::textUnit( 1.0, 1, myUnits, false, true ) ) );
   if (( myUnits == QGis::Degrees || myUnits == QGis::Feet )  &&
       mcbProjectionEnabled->isChecked() )
   {
     // Measuring on an ellipsoid returns meters, and so does using projections???
     myUnits = QGis::Meters;
-    QgsDebugMsg( "We're measuring on an ellipsoid or using projections, the system is returning meters" );
+    QgsDebugMsg( "We were measuring on an ellipsoid, the calculation returned meters" );
+    QgsDebugMsg( QString( "Set new units to %1" ).arg( QgsDistanceArea::textUnit( 1.0, 1, myUnits, false, true ) ) );
   }
 
   // Get the units for display
   QSettings settings;
   QString myDisplayUnitsTxt = settings.value( "/qgis/measure/displayunits", "meters" ).toString();
-
+  QgsDebugMsg( QString( "Preferred display units are %1" ).arg( myDisplayUnitsTxt ) );
   // Only convert between meters and feet
   if ( myUnits == QGis::Meters && myDisplayUnitsTxt == "feet" )
   {

src/core/qgsdistancearea.cpp

@@ -372,26 +372,37 @@ double QgsDistanceArea::measureLine( const QList<QgsPoint>& points )
 
 double QgsDistanceArea::measureLine( const QgsPoint& p1, const QgsPoint& p2 )
 {
+  double result;
+
   try
   {
     QgsPoint pp1 = p1, pp2 = p2;
+
+    QgsDebugMsg( QString( "Measuring from %1 to %2" ).arg( p1.toString( 4 ) ).arg( p2.toString( 4 ) ) );
     if ( mProjectionsEnabled && ( mEllipsoid != "NONE" ) )
     {
+      QgsDebugMsg( QString( "Ellipsoidal calculations is enabled, using ellipsoid %1" ).arg( mEllipsoid ) );
+      QgsDebugMsg( QString( "From proj4 : %1" ).arg( mCoordTransform->sourceCrs().toProj4() ) );
+      QgsDebugMsg( QString( "To   proj4 : %1" ).arg( mCoordTransform->destCRS().toProj4() ) );
       pp1 = mCoordTransform->transform( p1 );
       pp2 = mCoordTransform->transform( p2 );
-      return computeDistanceBearing( pp1, pp2 );
+      QgsDebugMsg( QString( "New points are %1 and %2, calculating..." ).arg( pp1.toString( 4 ) ).arg( pp2.toString( 4 ) ) );
+      result = computeDistanceBearing( pp1, pp2 );
     }
     else
     {
-      return sqrt(( p2.x() - p1.x() )*( p2.x() - p1.x() ) + ( p2.y() - p1.y() )*( p2.y() - p1.y() ) );
+      QgsDebugMsg( "Cartesian calculation on canvas coordinates" );
+      result = sqrt(( p2.x() - p1.x() ) * ( p2.x() - p1.x() ) + ( p2.y() - p1.y() ) * ( p2.y() - p1.y() ) );
     }
   }
   catch ( QgsCsException &cse )
   {
     Q_UNUSED( cse );
     QgsMessageLog::logMessage( QObject::tr( "Caught a coordinate system exception while trying to transform a point. Unable to calculate line length." ) );
-    return 0.0;
+    result = 0.0;
   }
+  QgsDebugMsg( QString( "The result was %1" ).arg( result ) );
+  return result;
 }