Bugfix for simulator to prevent GUI crash after first use

include/ui/revpicommander_ui.py

@@ -153,7 +153,7 @@ class Ui_win_revpicommander(object):
         self.act_disconnect.setText(_translate("win_revpicommander", "&Disconnect"))
         self.act_disconnect.setShortcut(_translate("win_revpicommander", "Ctrl+X"))
         self.act_reset.setText(_translate("win_revpicommander", "Reset driver..."))
-        self.act_simulator.setText(_translate("win_revpicommander", "Start local si&mulator..."))
+        self.act_simulator.setText(_translate("win_revpicommander", "RevPi si&mulator..."))
 from . import ressources_rc
 
 

include/ui_dev/revpicommander.ui

@@ -226,7 +226,7 @@
   </action>
   <action name="act_simulator">
    <property name="text">
-    <string>Start local si&amp;mulator...</string>
+    <string>RevPi si&amp;mulator...</string>
    </property>
   </action>
  </widget>

revpicommander/helper.py

@@ -248,6 +248,7 @@ class ConnectionManager(QtCore.QThread):
             xml_funcs = sp.system.listMethods()
             xml_mode = sp.xmlmodus()
         except Exception as e:
+            pi.logger.exception(e)
             self.connection_error_observed.emit(str(e))
             return False
 
@@ -322,10 +323,14 @@ class ConnectionManager(QtCore.QThread):
 
             self.xml_funcs = ["psstart", "psstop", "ps_devices", "ps_inps", "ps_outs", "ps_values", "ps_setvalue"]
 
+            self.connection_established.emit()
+
         except Exception as e:
             pi.logger.exception(e)
+            self.connection_error_observed.emit(str(e))
             self._revpi_output = None
             self._revpi = None
+            if settings.value("simulator/stop_remove", False, bool):
                 remove(procimg)
 
         return self._revpi is not None
@@ -453,15 +458,23 @@ class ConnectionManager(QtCore.QThread):
             return None
 
     @property
-    def connected(self):
+    def connected(self) -> bool:
         """True if we have an active connection."""
         return self._cli is not None
 
     @property
-    def simulating(self):
+    def simulating(self) -> bool:
         """True, if simulating mode is running."""
         return self._revpi is not None
 
+    @property
+    def simulating_configrsc(self) -> str:
+        return self._revpi.configrsc if self._revpi else ""
+
+    @property
+    def simulating_procimg(self) -> str:
+        return self._revpi.procimg if self._revpi else ""
+
 
 cm = ConnectionManager()
 """Clobal connection manager instance."""

revpicommander/revpicommander.py

@@ -70,6 +70,12 @@ class RevPiCommander(QtWidgets.QMainWindow, Ui_win_revpicommander):
 
     def _set_gui_control_states(self):
         """Setup states of actions and buttons."""
+        if helper.cm.simulating:
+            self.btn_plc_stop.setEnabled(True)  # Stop simulator
+            self.btn_plc_restart.setEnabled(True)  # Reset simulator values
+            self.btn_plc_debug.setEnabled(True)
+
+        else:
             connected = helper.cm.connected
             self.men_plc.setEnabled(connected)
             self.act_logs.setEnabled(connected)
@@ -128,6 +134,12 @@ class RevPiCommander(QtWidgets.QMainWindow, Ui_win_revpicommander):
         pi.logger.debug("RevPiCommander.on_cm_connection_established")
 
         self._set_gui_control_states()
+        if helper.cm.simulating:
+            self.txt_connection.setText("configrsc=\"{0}\", procimg=\"{1}\"".format(
+                helper.cm.simulating_configrsc,
+                helper.cm.simulating_procimg,
+            ))
+        else:
             self.txt_connection.setText("{0} - {1}:{2}".format(
                 helper.cm.name,
                 helper.cm.address,
@@ -194,13 +206,12 @@ class RevPiCommander(QtWidgets.QMainWindow, Ui_win_revpicommander):
     @QtCore.pyqtSlot()
     def on_act_simulator_triggered(self):
         """Start the simulator function."""
-        helper.cm.pyload_disconnect()
-
         diag = Simulator(self)
         if diag.exec() != QtWidgets.QDialog.Accepted:
             diag.deleteLater()
             return
 
+        helper.cm.pyload_disconnect()
         configrsc_file = helper.settings.value("simulator/configrsc", "", str)
         procimg_file = helper.settings.value("simulator/procimg", "", str)
 
@@ -212,12 +223,6 @@ class RevPiCommander(QtWidgets.QMainWindow, Ui_win_revpicommander):
                     "You can copy that from header textbox."
                 ).format(procimg_file, configrsc_file)
             )
-            self.txt_connection.setText("configrsc=\"{0}\", procimg=\"{1}\"".format(configrsc_file, procimg_file))
-
-            # Stop button will disable simulating
-            self.btn_plc_stop.setEnabled(True)
-            self.btn_plc_restart.setEnabled(True)
-            self.btn_plc_debug.setEnabled(True)
         else:
             pi.logger.error("Can not start simulator")
             QtWidgets.QMessageBox.critical(