After the "markerClick" event triggers in Angular2 SebmGoogleMapMarker, the view fails to update

I am dealing with an array structured like this:

    locations: marker[] = [
    {id: '1',  lat: 51.5239935252832,    lng:  5.137663903579778,   content: 'Kids Jungalow (5p)', iconUrl: 'img/marker.png'},
    {id: '2',  lat: 51.523853342911906,  lng:  5.1377765563584035,  content: 'Kids Jungalow (5p)', iconUrl: 'img/marker2.png'},
    {id: '3',  lat: 51.5237298485607,    lng:  5.137969675407476,   content: 'Kids Jungalow (5p)', iconUrl: 'img/marker2.png'},
    {id: '4',  lat: 51.52355628836575,   lng:  5.138066234932012,   content: 'Kids Jungalow (5p)', iconUrl: 'img/marker2.png'},
    {id: '5',  lat: 51.52340275379578,   lng:  5.138211074218816,   content: 'Kids Jungalow (5p)', iconUrl: 'img/marker2.png'},
    {id: '6',  lat: 51.523199152806626,  lng:  5.138382735595769,   content: 'Kids Jungalow (5p)', iconUrl: 'img/marker2.png' },
    {id: '7',  lat: 51.5229955509073,    lng:  5.138511481628484,   content: 'Kids Jungalow (5p)', iconUrl: 'img/marker2.png'},
    {id: '8',  lat: 51.52280529912936,   lng:  5.138543668136663,   content: 'Kids Jungalow (5p)', iconUrl: 'img/marker2.png'},
    {id: '9',  lat: 51.523596340777075,  lng:  5.138463201866216,   content: 'Kids Jungalow (5p)', iconUrl: 'img/marker2.png'},
    {id: '700',lat: 51.523372714362736,  lng:  5.1386992362595265,  content: 'Kids Jungalow (5p)', iconUrl: 'img/marker2.png'},
    {id: '101', lat: 51.52329594683302,  lng:  5.138838711128301,   content: 'Kids Jungalow Giraffe', iconUrl: 'img/marker2.png'}
];

Whenever I click on a marker, a section should open displaying the information of that particular marker.

Below is the HTML code for the google maps:

<sebm-google-map-marker *ngFor="let location of locations" (markerClick)="updateDiv(location)"></sebm-google-map-marker>

Here is the updateDiv() function: 

updateDiv(location: Location) {
    this.selectedLocation = location;
}

Below is the markup code for the div where I intend to show the id of the selected location:

<div *ngIf="selectedLocation" class="result-number">{{ selectedLocation.id }}</div>

However, it doesn't seem to be functioning correctly!

typescriptangularangular2-changedetection

Answer №1

If you're facing issues with updating the DOM in Angular, consider explicitly invoking the detectChanges method from the ChangeDetectorRef class:

constructor(private cdr:ChangeDetectorRef) {
}

(...)

updateDiv(location: Location) {
  this.selectedLocation = location;
  this.cdr.detectChanges();
}

Make sure that the updateDiv method is correctly receiving the location parameter and updating the selectedLocation variable in your TypeScript class.

If the above approach doesn't resolve the issue, you can utilize the NgZone service:

constructor(private ngZone:NgZone) {
}

(...)

updateDiv(location: Location) {
  this.ngZone.run(() => {
    this.selectedLocation = location;
  });
}

In cases where the processing is initiated from an external object (such as a Google Maps API) outside the Angular component's scope, additional adjustments may be required.

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