Launching of simulation application

src/bedit_gui/documents/document.py

@@ -16,7 +16,7 @@ from bedit_gui.commands.rename_component_command import RenameComponentCommand
 from bedit_gui.commands.rename_document_command import RenameDocumentCommand
 from bedit_gui.commands.simulation_database_command import ChangeSimulationDatabaseCommand
 from bedit_gui.commands.component_command import AddEmptyEquationComponent, AddEmptyGraphComponent, DeleteComponent, PasteComponents
-from bedit_gui.models import Icon, IconDatabase, SimulationDatabase
+from bedit_gui.models import Icon, IconDatabase, Simulation, SimulationDatabase
 from bedit_gui.services import document_files
 
 
@@ -131,6 +131,10 @@ class Document(QObject):
     def simulation_database(self) -> SimulationDatabase:
         return self.stored_simulation_database() or SimulationDatabase()
 
+    def active_simulation(self) -> Simulation | None:
+        database = self.simulation_database()
+        return database.simulations.get(database.active_simulation) if database.active_simulation is not None else None
+
     def change_simulation_database(self, database: SimulationDatabase) -> None:
         if database != self.stored_simulation_database():
             self.undo_stack.push(ChangeSimulationDatabaseCommand(self, database))