Mesh: correction to make meshing thread-safe with tab display

src/View/Geometry/Table.py

@@ -259,6 +259,9 @@ class GeometryReachTableModel(PamhyrTableModel):
                 **data
             )
 
+        self.apply_meshing(new_profiles, data, tableView)
+
+    def apply_meshing(self, new_profiles, data, tableView):
         if new_profiles is None:
             return
 

src/View/Geometry/Window.py

@@ -350,14 +350,22 @@ class GeometryWindow(PamhyrWindow):
             tableview = self.tableView
 
             def fn():
-                self._table.meshing(mesher, data, tableview)
+                return mesher.meshing(self._reach, **data)
-            # self._table.meshing(mesher, data, tableview)
+
             dlg2 = WaitingDialog(
                 payload_fn=fn,
                 title="waiting_mesh",
                 parent=self
             )
             dlg2.exec_()
+
+            if dlg2.worker_exception is not None:
+                raise dlg2.worker_exception
+
+            # Models, undo stacks and selections belong to the GUI thread.
+            self._table.apply_meshing(
+                dlg2.worker_result, data, tableview
+            )
             self._table.update()
 
         except Exception as e:

src/View/WaitingDialog.py

@@ -47,10 +47,16 @@ class Worker(QObject):
         super(self.__class__, self).__init__(parent)
 
         self._payload_fn = payload_fn
+        self.result = None
+        self.exception = None
 
     def process(self):
-        self._payload_fn()
+        try:
-        self.signalStatus.emit('end')
+            self.result = self._payload_fn()
+        except Exception as exception:
+            self.exception = exception
+        finally:
+            self.signalStatus.emit('end')
 
 
 class WaitingDialog(PamhyrDialog):
@@ -123,6 +129,14 @@ class WaitingDialog(PamhyrDialog):
         self._timer = QTimer(self)
         self._timer.timeout.connect(self.update_spinner)
 
+    @property
+    def worker_result(self):
+        return self._worker.result
+
+    @property
+    def worker_exception(self):
+        return self._worker.exception
+
     def update_spinner(self):
         self._spinner_step += 1
         self._spinner_step %= len(self._spin)