import type { INotifyPropertiesChanged } from '../../viewModels';
import { ValidationTrigger } from './ValidationTrigger';
/**
 * Represents the view model validation trigger configuration.
 * @template TViewModel The view model type that may trigger validations.
 */
export interface IViewModelChangedValidationTriggerConfig<TViewModel extends INotifyPropertiesChanged = INotifyPropertiesChanged> {
    /**
     * The view model that may trigger a validation.
     */
    readonly viewModel: TViewModel;
    /**
     * Optional, a guard method which controls when a validation should be triggered.
     * @param viewModel The view model that has changed.
     * @param changedProperties The properties that have changed on the view model.
     */
    shouldTriggerValidation?(viewModel: TViewModel, changedProperties: readonly (keyof TViewModel)[]): boolean;
}
/**
 * Represents a view model validation trigger, whenever the view model changes a validation should occur.
 * @template TViewModel The view model type that may trigger validations.
 */
export declare class ViewModelChangedValidationTrigger<TViewModel extends INotifyPropertiesChanged = INotifyPropertiesChanged> extends ValidationTrigger<TViewModel> {
    private readonly _viewModelChangedEventHandler;
    /**
     * Initializes a new instance of the {@linkcode ViewModelChangedValidationTrigger} class.
     * @param config The validation trigger config.
     */
    constructor(config: IViewModelChangedValidationTriggerConfig<TViewModel>);
    /**
     * Subscribes to view model changes.
     */
    protected subscribeToTarget(): void;
    /**
     * Unsubscribes from view model changes.
     */
    protected unsubscribeFromTarget(): void;
}