Fix calling GUI methods from script thread

scriptengine.h

@@ -10,6 +10,8 @@
 #include "database.h"
 #include "imageinfo.h"
 
+class BatchProcessing;
+
 namespace Script
 {
 
@@ -20,14 +22,14 @@ class ScriptEngine : public QObject
     Q_OBJECT
     QJSEngine *_jsEngine;
     Database *_database;
-    QDialog *_parent;
+    BatchProcessing *_parent;
     QThreadPool *_pool;
     QSemaphore _semaphore;
     QString _scriptPath;
     QString _outputDir;
     QList<QPair<QString, QString>> _paths;
 public:
-    explicit ScriptEngine(QDialog *parent = nullptr);
+    explicit ScriptEngine(BatchProcessing *parent = nullptr);
     void setParams(const QString &scriptPath, const QList<QPair<QString, QString>> &paths, const QString &outputDir);
     void reportError(const QString &message);
     const QString& outputDir() const;
@@ -59,7 +61,7 @@ class ScriptEngineThread : public QObject
     QThread *_thread;
     ScriptEngine *_engine;
 public:
-    ScriptEngineThread(QDialog *parent = nullptr);
+    ScriptEngineThread(BatchProcessing *parent = nullptr);
     ~ScriptEngineThread();
     void setParams(const QString &scriptPath, const QList<QPair<QString, QString>> &paths, const QString &outputDir);
     void start();