NodeFlowAction<T> class abstract

Base class for actions that can be triggered in the node flow editor.

An action represents a user operation that can be executed via keyboard shortcuts, menu items, or programmatically. Actions encapsulate both the operation logic and metadata for UI presentation.

Each action has:

• Unique id for identification and mapping to shortcuts
• Human-readable label for menus and command palettes
• Optional description for tooltips
• category for grouping in menus
• execute method that performs the operation
• canExecute method for conditional enabling

Example implementation:

class MyCustomAction<T> extends NodeFlowAction<T> {
  const MyCustomAction()
    : super(
        id: 'my_custom_action',
        label: 'My Custom Action',
        description: 'Does something custom',
        category: 'Custom',
      );

  @override
  bool execute(NodeFlowController<T> controller, BuildContext? context) {
    // Perform the action
    controller.selectAllNodes();
    return true; // Return true if action succeeded
  }

  @override
  bool canExecute(NodeFlowController<T> controller) {
    return controller.nodes.isNotEmpty;
  }
}