Added new validator, userform validation

core/formdialog.h

@@ -20,13 +20,17 @@ public:
 
     void setForm(IForm *formWidget);
 
-private slots:
-    void on_buttonBox_accepted();
-
 private:
     bool m_formSet;
     IForm *m_form;
     Ui::FormDialog *ui;
+
+private slots:
+    void onValidationError(const QString &message);
+
+    // QDialog interface
+public slots:
+    void accept();
 };
 
 #endif // FORMDIALOG_H