Remember last used directory for raster save as dialog (fix #6950)

src/app/qgisapp.cpp

@@ -5022,6 +5022,9 @@ void QgisApp::saveAsRasterFile()
                                 this );
   if ( d.exec() == QDialog::Accepted )
   {
+    QSettings settings;
+    settings.setValue( "/UI/lastRasterFileDir", QFileInfo( d.outputFileName() ).absolutePath() );
+
     QgsRasterFileWriter fileWriter( d.outputFileName() );
     if ( d.tileMode() )
     {

src/gui/qgsrasterlayersaveasdialog.cpp

@@ -155,12 +155,16 @@ QgsRasterLayerSaveAsDialog::~QgsRasterLayerSaveAsDialog()
 void QgsRasterLayerSaveAsDialog::on_mBrowseButton_clicked()
 {
   QString fileName;
+
+  QSettings settings;
+  QString dirName = mSaveAsLineEdit->text().isEmpty() ? settings.value( "/UI/lastRasterFileDir", "." ).toString() : mSaveAsLineEdit->text();
+
   if ( mTileModeCheckBox->isChecked() )
   {
     while ( true )
     {
       // TODO: would not it be better to select .vrt file instead of directory?
-      fileName = QFileDialog::getExistingDirectory( this, tr( "Select output directory" ) );
+      fileName = QFileDialog::getExistingDirectory( this, tr( "Select output directory" ), dirName );
       //fileName = QFileDialog::getSaveFileName( this, tr( "Select output file" ), QString(), tr( "VRT" ) + " (*.vrt *.VRT)" );
 
       if ( fileName.isEmpty() ) break; // canceled
@@ -194,7 +198,7 @@ void QgsRasterLayerSaveAsDialog::on_mBrowseButton_clicked()
   }
   else
   {
-    fileName = QFileDialog::getSaveFileName( this, tr( "Select output file" ), QString(), tr( "GeoTIFF" ) + " (*.tif *.tiff *.TIF *.TIFF)" );
+    fileName = QFileDialog::getSaveFileName( this, tr( "Select output file" ), dirName, tr( "GeoTIFF" ) + " (*.tif *.tiff *.TIF *.TIFF)" );
   }
 
   if ( !fileName.isEmpty() )