50 lines
1.9 KiB
JavaScript
Executable File
50 lines
1.9 KiB
JavaScript
Executable File
import * as i0 from '@angular/core';
|
|
import { Injectable } from '@angular/core';
|
|
|
|
/**
|
|
* Class to coordinate unique selection based on name.
|
|
* Intended to be consumed as an Angular service.
|
|
* This service is needed because native radio change events are only fired on the item currently
|
|
* being selected, and we still need to uncheck the previous selection.
|
|
*
|
|
* This service does not *store* any IDs and names because they may change at any time, so it is
|
|
* less error-prone if they are simply passed through when the events occur.
|
|
*/
|
|
class UniqueSelectionDispatcher {
|
|
_listeners = [];
|
|
/**
|
|
* Notify other items that selection for the given name has been set.
|
|
* @param id ID of the item.
|
|
* @param name Name of the item.
|
|
*/
|
|
notify(id, name) {
|
|
for (let listener of this._listeners) {
|
|
listener(id, name);
|
|
}
|
|
}
|
|
/**
|
|
* Listen for future changes to item selection.
|
|
* @return Function used to deregister listener
|
|
*/
|
|
listen(listener) {
|
|
this._listeners.push(listener);
|
|
return () => {
|
|
this._listeners = this._listeners.filter((registered) => {
|
|
return listener !== registered;
|
|
});
|
|
};
|
|
}
|
|
ngOnDestroy() {
|
|
this._listeners = [];
|
|
}
|
|
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "20.2.0-next.2", ngImport: i0, type: UniqueSelectionDispatcher, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
|
|
static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "20.2.0-next.2", ngImport: i0, type: UniqueSelectionDispatcher, providedIn: 'root' });
|
|
}
|
|
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "20.2.0-next.2", ngImport: i0, type: UniqueSelectionDispatcher, decorators: [{
|
|
type: Injectable,
|
|
args: [{ providedIn: 'root' }]
|
|
}] });
|
|
|
|
export { UniqueSelectionDispatcher };
|
|
//# sourceMappingURL=unique-selection-dispatcher.mjs.map
|