Method keyPressEvent

src/core/node_graph.py:114–173

(self, event: QKeyEvent)

        self.update()

    def keyPressEvent(self, event: QKeyEvent):
        # Handle undo/redo shortcuts
        if event.modifiers() & Qt.ControlModifier:
            if event.key() == Qt.Key_Z:
                if event.modifiers() & Qt.ShiftModifier:
                    print(f"\n=== KEYBOARD REDO TRIGGERED ===")
                    self.redo_last_command()
                else:
                    print(f"\n=== KEYBOARD UNDO TRIGGERED ===")
                    self.undo_last_command()
                return
            elif event.key() == Qt.Key_Y:
                print(f"\n=== KEYBOARD REDO (Y) TRIGGERED ===")
                self.redo_last_command()
                return
            elif event.key() == Qt.Key_G:
                selected_nodes = [item for item in self.selectedItems() if isinstance(item, Node)]
                if len(selected_nodes) >= 2:
                    self._create_group_from_selection(selected_nodes)
                # If insufficient nodes, the validation in _create_group_from_selection will show an error
                return
        
        # Handle delete operations
        if event.key() == Qt.Key_Delete:
            print(f"\n=== KEYBOARD DELETE TRIGGERED ===")
            selected_items = list(self.selectedItems())
            print(f"DEBUG: Found {len(selected_items)} selected items")
            
            for i, item in enumerate(selected_items):
                print(f"DEBUG: Selected item {i}: {type(item).__name__} - {getattr(item, 'title', 'No title')} (ID: {id(item)})")
            
            if selected_items:
                commands = []
                
                # Use the improved DeleteMultipleCommand that handles all item types including Groups
                from commands.node.batch_operations import DeleteMultipleCommand
                delete_cmd = DeleteMultipleCommand(self, selected_items)
                print(f"DEBUG: Using DeleteMultipleCommand: {delete_cmd.get_description()}")
                result = self.execute_command(delete_cmd)
                print(f"DEBUG: DeleteMultipleCommand returned: {result}")
                return
                
                print(f"DEBUG: Created {len(commands)} delete commands")
                
                # Execute as composite command if multiple items
                if len(commands) > 1:
                    print(f"DEBUG: Executing composite command with {len(commands)} commands")
                    composite = CompositeCommand(f"Delete {len(commands)} items", commands)
                    result = self.execute_command(composite)
                    print(f"DEBUG: Composite command returned: {result}")
                elif len(commands) == 1:
                    print(f"DEBUG: Executing single command")
                    result = self.execute_command(commands[0])
                    print(f"DEBUG: Single command returned: {result}")
                else:
                    print(f"DEBUG: No commands to execute")
            else:
                print(f"DEBUG: No items selected for deletion")