Angular Map - Handle the Related Events

The Map UI component fires the routeAdded and routeRemoved events when a marker is added or removed. To handle them, assign functions to the onRouteAdded and onRouteRemoved properties, respectively.

jQuery
JavaScript
$(function() {
    $("#mapContainer").dxMap({
        center: { lat: 40.749825, lng: -73.987963 },
        zoom: 10,
        onRouteAdded: function (e) {
            const addedRoute = e.options;
            // The original route used by the current map provider 
            const originalRoute = e.originalRoute;
            // Event handling commands go here
        },
        onRouteRemoved: function (e) {
            const removedRoute = e.options;
            // Event handling commands go here
        }
    });
});
Angular
HTML
TypeScript
<dx-map
    [center]="{ lat: 40.749825, lng: -73.987963 }"
    [zoom]="10"
    (onRouteAdded)="routeAdded($event)"
    (onRouteRemoved)="routeRemoved($event)">
</dx-map>
import { DxMapModule } from "devextreme-angular";
// ...
export class AppComponent {
    routeAdded (e) {
        const addedRoute = e.options;
        // The original route used by the current map provider 
        const originalRoute = e.originalRoute;
        // Event handling commands go here
    };
    routeRemoved (e) {
        const removedRoute = e.options;
        // Event handling commands go here
    }
}
@NgModule({
    imports: [
        // ...
        DxMapModule
    ],
    // ...
})
Vue
<template>
    <DxMap
        :zoom="10"
        :center="centerCoordinates"
        @route-added="routeAdded"
        @route-removed="routeRemoved"
    />
</template>

<script>
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import { DxMap } from 'devextreme-vue/map';

export default {
    components: {
        DxMap
    },
    data() {
        return {
            centerCoordinates: { lat: 40.749825, lng: -73.987963 }
        };
    },
    methods: {
        routeAdded(e) {
            const addedRoute = e.options;
            // The original route used by the current map provider 
            const originalRoute = e.originalRoute;
            // Event handling commands go here
        },
        routeRemoved(e) {
            const removedRoute = e.options;
            // Event handling commands go here
        }
    }
}
</script>
React
import React from 'react';
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import { Map } from 'devextreme-react/map';

const centerCoordinates = { lat: 40.749825, lng: -73.987963 };

class App extends React.Component {
    constructor(props) {
        super(props);

        this.routeRemoved = this.routeAdded.bind(this);
        this.routeRemoved = this.routeRemoved.bind(this);
    }

    routeAdded(e) {
        const addedRoute = e.options;
        // The original route used by the current map provider 
        const originalRoute = e.originalRoute;
        // Event handling commands go here
    }

    routeRemoved(e) {
        const removedRoute = e.options;
        // Event handling commands go here
    }

    render() {
        return (
            <Map
                defaultZoom={10}
                defaultCenter={centerCoordinates}
                onRouteAdded={this.routeAdded}
                onRouteRemoved={this.routeRemoved}
            />
        );
    }
}

export default App;

If you are going to change event handlers at runtime, or if you need to attach several handlers to a single event, subscribe to the markerAdded and markerRemoved events using the on(eventName, eventHandler) method. This approach is more typical of jQuery.

JavaScript
const routeRemovedHandler1 = function (e) {
    const removedRoute = e.options;
    // First handler of the "routeRemoved" event
};

const routeRemovedHandler2 = function (e) {
    const removedRoute = e.options;
    // Second handler of the "routeRemoved" event
};

$("#mapContainer").dxMap("instance")
    .on("routeRemoved", routeRemovedHandler1)
    .on("routeRemoved", routeRemovedHandler2);
See Also