openFilesDialog: log user's choice

Author: Fedr

source/MRViewer/MRFileDialog.cpp

@@ -449,8 +449,22 @@ std::vector<std::filesystem::path> openFilesDialog( const FileParameters& params
 #elif !defined( MRVIEWER_NO_GTK )
     results = gtkDialog( parameters );
 #endif
-    if ( !results.empty() )
+    if ( results.empty() )
+        spdlog::info( "Open dialog canceled" );
+    else
+    {
+        spdlog::info( "Open dialog returned {} items", results.size() );
+        for ( size_t i = 0; i < results.size(); ++i )
+        {
+            std::error_code ec;
+            auto sz = file_size( results[i], ec );
+            if ( ec )
+                spdlog::info( "  item #{}: {}, access error {}", i, MR::utf8string( results[i] ), ec.message() );
+            else
+                spdlog::info( "  item #{}: {}, filesize={}", i, MR::utf8string( results[i] ), sz );
+        }
         FileDialogSignals::instance().onOpenFiles( results );
+    }
     return results;
 }