raster calculator fixes (fixes #12238)

* GDALGetGeoTransform failures can be ignored (partly reverts 0080f9e)
* handle quoted raster references
* don't complain if the output file is not yet set

python/analysis/raster/qgsrastercalcnode.sip

@@ -35,7 +35,8 @@ class QgsRasterCalcNode
       opLE,         // <=
       opAND,
       opOR,
-      opSIGN    //change sign
+      opSIGN,       // change sign
+      opNONE,
     };
 
     QgsRasterCalcNode();

src/analysis/raster/qgsrastercalcnode.cpp

@@ -20,7 +20,7 @@ QgsRasterCalcNode::QgsRasterCalcNode()
     , mLeft( 0 )
     , mRight( 0 )
     , mNumber( 0 )
-    , mOperator( opPLUS ) //not used
+    , mOperator( opNONE )
 {
 }
 
@@ -29,7 +29,7 @@ QgsRasterCalcNode::QgsRasterCalcNode( double number )
     , mLeft( 0 )
     , mRight( 0 )
     , mNumber( number )
-    , mOperator( opPLUS ) //not used
+    , mOperator( opNONE )
 {
 }
 
@@ -48,8 +48,10 @@ QgsRasterCalcNode::QgsRasterCalcNode( const QString& rasterName )
     , mRight( 0 )
     , mNumber( 0 )
     , mRasterName( rasterName )
-    , mOperator( opPLUS ) //not used
+    , mOperator( opNONE )
 {
+  if ( mRasterName.startsWith( '"' ) && mRasterName.endsWith( '"' ) )
+    mRasterName = mRasterName.mid( 1, mRasterName.size() - 2 );
 }
 
 QgsRasterCalcNode::~QgsRasterCalcNode()

src/analysis/raster/qgsrastercalcnode.h

@@ -57,7 +57,8 @@ class ANALYSIS_EXPORT QgsRasterCalcNode
       opLE,         // <=
       opAND,
       opOR,
-      opSIGN    //change sign
+      opSIGN,       // change sign
+      opNONE,
     };
 
     QgsRasterCalcNode();

src/analysis/raster/qgsrastercalculator.cpp

@@ -160,7 +160,6 @@ int QgsRasterCalculator::processCalculation( QProgressDialog* p )
   QgsRasterMatrix resultMatrix;
 
   //read / write line by line
-  bool encounteredError = false;
   for ( int i = 0; i < mNumOutputRows; ++i )
   {
     if ( p )
@@ -179,11 +178,11 @@ int QgsRasterCalculator::processCalculation( QProgressDialog* p )
     {
       double sourceTransformation[6];
       GDALRasterBandH sourceRasterBand = mInputRasterBands[bufferIt.key()];
-      if ( !GDALGetGeoTransform( GDALGetBandDataset( sourceRasterBand ), sourceTransformation ) )
+      if ( GDALGetGeoTransform( GDALGetBandDataset( sourceRasterBand ), sourceTransformation ) != CE_None )
       {
-        encounteredError = true;
-        break;
+        qWarning( "GDALGetGeoTransform failed!" );
       }
+
       //the function readRasterPart calls GDALRasterIO (and ev. does some conversion if raster transformations are not the same)
       readRasterPart( targetGeoTransform, 0, i, mNumOutputColumns, 1, sourceTransformation, sourceRasterBand, bufferIt.value()->data() );
     }
@@ -249,11 +248,11 @@ int QgsRasterCalculator::processCalculation( QProgressDialog* p )
     GDALClose( *datasetIt );
   }
 
-  if (( p && p->wasCanceled() ) || encounteredError )
+  if ( p && p->wasCanceled() )
   {
     //delete the dataset without closing (because it is faster)
     GDALDeleteDataset( outputDriver, TO8F( mOutputFile ) );
-    return encounteredError ? 1 : 3;
+    return 3;
   }
   GDALClose( outputDataset );
   CPLFree( resultScanLine );

src/app/qgsrastercalcdialog.cpp

@@ -296,15 +296,12 @@ bool QgsRasterCalcDialog::expressionValid() const
 
 bool QgsRasterCalcDialog::filePathValid() const
 {
-  QString outputPath = QFileInfo( mOutputLayerLineEdit->text() ).absolutePath();
-  if ( QFileInfo( outputPath ).isWritable() )
-  {
-    return true;
-  }
-  else
-  {
+  QString outputPath = mOutputLayerLineEdit->text();
+  if ( outputPath.isEmpty() )
     return false;
-  }
+
+  outputPath = QFileInfo( outputPath ).absolutePath();
+  return QFileInfo( outputPath ).isWritable();
 }
 
 void QgsRasterCalcDialog::on_mRasterBandsListWidget_itemDoubleClicked( QListWidgetItem* item )