when an error occurs during starting the debugging session, show it in an error message box

Author: robertbasic

pugdebug/debugger.py

@@ -34,6 +34,8 @@ class PugdebugDebugger(QObject):
     expression_evaluated_signal = pyqtSignal(int, dict)
     expressions_evaluated_signal = pyqtSignal(list)
 
+    error_signal = pyqtSignal(str)
+
     def __init__(self):
         """Init the debugger object
 
@@ -111,9 +113,12 @@ def handle_server_connected(self, init_message):
 
         Emit a debugging started signal.
         """
-        self.init_message = init_message
+        if 'error' not in init_message:
+            self.init_message = init_message
 
-        self.debugging_started_signal.emit()
+            self.debugging_started_signal.emit()
+        else:
+            self.error_signal.emit(init_message['error'])
 
     def cancel_debug(self):
         self.server.cancel()

pugdebug/pugdebug.py

@@ -10,6 +10,7 @@
 __author__ = "robertbasic"
 
 from PyQt5.QtCore import QObject
+from PyQt5.QtWidgets import QErrorMessage
 
 from pugdebug.debugger import PugdebugDebugger
 from pugdebug.syntaxer import PugdebugFormatter
@@ -172,6 +173,10 @@ def connect_debugger_signals(self):
             self.handle_expressions_evaluated
         )
 
+        self.debugger.error_signal.connect(
+            self.handle_error
+        )
+
     def connect_expression_viewer_signals(self):
         self.expression_viewer.expression_added_signal.connect(
             self.handle_expression_added_or_changed
@@ -616,6 +621,10 @@ def handle_expression_added_or_changed(self, index, expression):
         if self.debugger.is_connected():
             self.debugger.evaluate_expression(index, expression)
 
+    def handle_error(self, error):
+        em = QErrorMessage(self.main_window)
+        em.showMessage(error)
+
     def __get_path_mapped_to_local(self, path, map_paths=True):
         """Get a path mapped to local