I'm using ember-leaflet to display Leaflet maps in my Ember application. In my case, the map is used to display an appointment location. The user selects an appointment from a list and the corresponding appointment details (including the map) are then displayed.
When an appointment is selected, the details are passed to a component, which contains the map. Unfortunately, after the user selects an appointment and then another is selected, the coordinates on the map do not change. However, outputting the coordinates using Handlebars, I can in fact see that the different coordinates are being passed. That leads me to believe that the map needs to be "refreshed" somehow in order for the new coordinates to be displayed on the map.
I use the component like so: {{ember-leaflet geoJSON=geoJSON}} where geoJSON is a string containing the location data.
My component is as follows:
// components/leaflet-map.js
import Ember from 'ember';
import ENV from '../config/environment';
import EmberLeafletComponent from 'ember-leaflet/components/leaflet-map';
import MarkerCollectionLayer from 'ember-leaflet/layers/marker-collection';
import TileLayer from 'ember-leaflet/layers/tile';
L.Icon.Default.imagePath = '/images/leaflet';
export default EmberLeafletComponent.extend({
center: Ember.computed(function() {
return this.get('coordinates');
}),
/////////////////////////////////////
// PROPERTIES
/////////////////////////////////////
geoJSON: null,
/////////////////////////////////////
// COMPUTED PROPERTIES
/////////////////////////////////////
childLayers: Ember.computed('coordinates', function() {
return [
TileLayer.extend({
tileUrl: 'https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token={accessToken}',
options: {
id: 'XXXXXXX',
accessToken: ENV.APP.MAPBOX_KEY
}
}),
MarkerCollectionLayer.extend({
content: [{ location: this.get('coordinates') }]
})
];
}),
coordinates: Ember.computed('geoJSON', function() {
if (this.get('geoJSON')) {
const coordinates = JSON.parse(this.get('geoJSON')).coordinates;
if (coordinates) {
return L.latLng(coordinates[1], coordinates[0]);
}
}
return null;
}),
});
When setting a breakpoint, it appears that childLayers and coordinates are only being called once regardless of which appointment is selected by the user. I've considered setting up an observer to observe the geoJSON property, but it seems overkill.
Any help would be greatly appreciated!
Related
I am using VueMapbox (0.4.1) to utilize Mapbox GL in a Vue project.
<template>
<MglMap
:accessToken="accessToken"
:mapStyle.sync="mapStyle"
:repaint="true"
#load="onMapLoaded">
<MglMarker
:coordinates="someCoordinates"
class="map-marker-wrapper">
<div
slot="marker"
class="map-marker">
</div>
</MglMarker>
</MglMap>
</template>
<script>
import Mapbox from 'mapbox-gl'
import { MglMap, MglMarker } from 'vue-mapbox'
import * as MAP from '#/constants/map'
// Vue-Mapbox documentation: https://soal.github.io/vue-mapbox/guide/basemap.html#adding-map-component
export default {
name: 'Map',
components: {
MglMap,
MglMarker
},
props: {
someCoordinates: {
type: Array,
required: true
},
darkMode: {
type: Boolean,
required: true
}
},
data () {
return {
accessToken: MAP.ACCESS_TOKEN,
mapbox: null,
map: null,
actionsDispatcher: null
}
},
computed: {
mapStyle () {
return this.darkMode ? MAP.COLOR_PROFILES.DARK : MAP.COLOR_PROFILES.LIGHT
}
},
created () {
this.mapbox = Mapbox
},
methods: {
async onMapLoaded (event) {
this.map = event.map
this.actionsDispatcher = event.component.actions
await this.actionsDispatcher.flyTo({
center: this.someCoordinates
})
}
}
}
</script>
On the first load, everything works as expected:
But if I move to a different pseudo-route (say from /#/Map to /#/Profile and back), some of the map layers specified by my mapStyle (roads, city names,..) are not rendered anymore (default layers instead). The map also stops honoring any change of the mapStyle url, even when I specify mapStyle.sync in my template.
If I hit the browser's reload button it loads the layers as expected as the entire app is reloaded from scratch, but I unfortunately cannot afford to do this by default.
Any ideas are greatly appreciated.
I found a solution, in the example of vue-mapbox, the variable map (this.map) is set by "event.map" which causes an error because the card is not refreshed afterwards.
In my case i just remove that (this.map = event.map) in my onMapLoaded function and this is great.
Have a good day.
Despite I don’t know the syntax of Vue.js, the problem you are facing is that you are creating your layers in map.on('load', ... which is an event that happens only once, so when the style change happens, all the layers of the map style (including the ones created by custom code) are removed.
If you want to recreate your layers on style change, you have to do it in the event map.on('style.load', ..., but as said, I don’t see in your vue.js code where that is being done. If you share the part of the code where vue.js is invoking the methods it’ll be easier to help you
I am working on an arcgis map, I'm trying to update the map center by calling goTo() on my mapview but for some reason the map just changes to be blank and never updates, I am logging the new coordinates and they are correct.
I am using the reference docs here: https://developers.arcgis.com/javascript/latest/api-reference/esri-views-MapView.html
Can someone with some arcgis experience help me out. I know this isn't an issue with my code specifically but it might be an issue with vue and component rendering as it relates to arcgis
so far I have tried
- getting rid of props and updating everything within the component locally
- using keys to force re-render the component
as an interesting note, if I just enter in some magic numbers for my new location the map updates correctly, however when i use some function to get the location and then pass it in, it does not work and just shows as a blank map
my app.vue
<template>
<div id="app">
<web-map v-bind:centerX="lat" v-bind:centerY="long" ref="map"/>
<div class="center">
<b-button class="btn-block" #click="updateCenter()" variant="primary">My Location</b-button>
</div>
</div>
</template>
<script>
import WebMap from './components/webmap.vue';
export default {
name: 'App',
components: { WebMap },
data(){
return{
lat: null,
long: null,
}
},
methods:{
updateCenter(){
this.$refs.map.getLocation()
}
},
};
</script>
my map component
<template>
<div></div>
</template>
<script>
import { loadModules } from 'esri-loader';
export default {
name: 'web-map',
data: function(){
return{
X: -118,
Y: 34,
}
},
mounted() {
console.log('new data',this.X,this.Y)
// lazy load the required ArcGIS API for JavaScript modules and CSS
loadModules(['esri/Map', 'esri/views/MapView'], { css: true })
.then(([ArcGISMap, MapView]) => {
const map = new ArcGISMap({
basemap: 'topo-vector'
});
this.view = new MapView({
container: this.$el,
map: map,
center: [-118,34], ///USE PROPS HERE FOR NEW CENTER
zoom: 8
});
});
},
beforeDestroy() {
if (this.view) {
// destroy the map view
this.view.container = null;
}
},
methods:{
showPos(pos){
console.log('new location',pos.coords.latitude,pos.coords.longitude)
this.view.goTo({center:[pos.coords.latitude,pos.coords.longitude]})
},
getLocation(){
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(this.showPos);
} else {
console.log("Geolocation is not supported by this browser.");
}
},
}
};
</script>
Switch:
this.view = new MapView({
container: this.$el,
map: map,
center: [-118,34], ///USE PROPS HERE FOR NEW CENTER
zoom: 8
});
to
this.view = new MapView({
container: this.$el,
map: map });
this.view.center.longitude = -118;
this.view.center.latitude = 34;
this.view.zoom = 8;
The other answer by Tao has the long/latitude backwards in the .goTo({center: []}) method call, which is why it goes to the ocean: https://developers.arcgis.com/javascript/latest/api-reference/esri-views-MapView.html#goTo
Here's something that works:
https://codesandbox.io/s/frosty-glitter-39wpe?file=/src/App.vue
I made it from scratch, only taking small bits from yours and combining them with some examples from ArcGIS (which I'm not familiar with, at all).
One thing to note is that the .goTo({center: [lat, long]}) didn't work as expected: it kept centering in the middle of some ocean.
I then imported Point from esri and passed the center as new Point(long, lat), which seems to produce the expected result. Since it works, I haven't looked further, but I guess it should be doable without the conversion. You probably need to pass in the coordinates system or something along these lines.
As far as I can tell, what's wrong in your example is the way you try to pass data down from parent to child. You expect this.$refs.map to be a Vue instance, but it's not. It's a DOM element. It's basically the Vue instance's $el. Accessing child methods from parent instance is not so straight forward.
Another thing to notice is that, even though you bind centerX and centerY on child in your example, you never seem to use them (but I guess that's just a left over from when you tried with props !?).
Anyways, in my example, I chose to simply update the coords prop of the children while having a watch fn to handle re-centering.
I'm programming a page that displays a list of meetings in a table. It's also possible to edit and delete meetings. Now I'd like to offer an alternative view using VCalendar.
Data is received from the server on page load and stored in a JS variable. Both the Vue instance containing the table and the VCalendar component share this data. If I edit a table cell, the changes are reflected in the component. But when I delete a date in the table view, it remains in the calendar.
This is the relevant HTML (edit: Added some attributes to the td):
<calendar-component></calendar-component>
<table id='meetings-table'>
<tr v-for='meeting in meetings' :key='date.id'>
<td contenteditable #blur='handleInput($event,meeting,"name")>
#{{ meeting.name }}
</td>
<td>
<input type='checkbox' v-model='selected'
:value='meeting.id'>
</td>
</tr>
</table>
<div>
<button v-if='selected.length' #click='deleteMeetings'>
Delete selected rows
</button>
</div>
My JS (edit: Added handleInput method):
let table = new Vue({
el:'#meetings-table',
data: {
selected: [],
meetings: window.meetings,
},
methods: {
/**
* Deletes selected meetings.
*/
deleteMeetings: function () {
let requests = [];
// Make a single request and store it
for (let id of this.selected) {
requests.push(axios.delete('/termine/' + id)
.then(response => {
// Remove meetings
this.meetings = this.meetings.filter(t => t.id != id);
// Remove id from list of selected meetings
this.selected = this.selected.filter(elem => elem != id);
}));
}
const axiosArray = axios.all(requests);
},
/**
* Handles edits in table cells.
*/
handleInput: function($event, meeting, field) {
const newValue = $event.target.textContent;
// Update value in $data
meeting[field] = newValue;
// AJAX request follows, but is not necessary for this example to work
}
}
});
The relevant parts of the component:
<template>
<v-calendar :attributes='attributes'>
<div
slot='meeting-row'
slot-scope='{ customData }'>
<!-- Popover content omitted -->
</div>
</v-calendar>
</template>
<script>
let meetings = window.meetings;
export default {
data() {
return {
incId: meetings.length,
editId: 0,
meetings,
};
},
computed: {
attributes() {
return [
// Today attribute
{
// ...
},
// Meeting attributes
...this.meetings.map(meeting => ({
key: meeting.id,
dates: new Date('2018,11,31'),// moment(meeting.slot.date, 'DD.MM.YY').format('YYYY, MM, DD'), //meeting.dates,
customData: meeting,
order: meeting.id,
dot: {
backgroundColor: '#ff8080',
},
popover: {
// Matches slot from above
slot: 'meeting-row',
}
}))
];
}
}
};
</script>
This is what happens:
I load the page containing only a single meeting. The meeting is
shown both in the table and the calendar component. Vue devtools show
it in both meetings arrays (in the component as well as in the other
Vue instance). Using the console, I can also see it in
window.meetings.
After clicking the delete button (triggering the deleteMeetings method in my JS), the meeting is gone from the table, but remains in
the calendar, in the component's meetings array and in
window.meetings.
What do I have to change to keep the meetings arrays in sync even when deleting a meeting in the table? Note that I haven't yet implemented any methods for the calendar component.
Calendar, and table components should share a single state: currently selected meetings. From what I understand, right now you have that state in 2 separate places: table Vue instance, and a calendar-component, which is a child of some other Vue instance.
It may look like you're sharing the state already (with window.meetings), but it's not the case: you only initialize the same set of meetings when the components are created. And then changes in one component are not reflected in another component.
What you can try to do is to have meetings stored in the 'main' Vue app on your page, pass them as props to table and calendar components, and then trigger events from table and calendar components, when meetings array is modified. You should also define the event hanlders in the 'main' Vue app, and listen on components. A rough sketch of the solution:
<div id="app">
<table-component
:meetings="meetings"
#meetingUpdated="handleMeetingUpdate"
#meetingDeleted="handleMeetingDeletion"
></table-component>
<calendar-component
:meetings="meetings"
#meetingUpdate="handleMeetingUpdate"
#meetingDeleted="handleMeetingDeletion"
></calendar-component>
</div>
let app = new Vue({
el:'#app',
data: {
meetings: []
},
methods: {
handleMeetingUpdate(event) {
//
},
handleMeetingDeletion(event) {
//
},
}
//
});
I hope the above is enough to point you in the right direction. If not, please let me know, and I'll do my best to help you with this further.
Using the Dojo framework.
I have a 2 nested grid. Grid 1 uses a Dod with a detailprovider to load details on demand when one clicks a expand icon. When pressed this opens a nested grid. I need to track changes made in both grids. In the declaring class I've got an array that keeps track on changes made. The problem is that I can't access the array from a detailprovider. Since I've to conform to the protocol which gridx later invokes. What can I do to obtain a ref to the declaring class
var myDeclaringClass = declare([_WidgetBase,_TemplatedMixin,_WidgetsInTemplateMixin], {
array: [],
initGrid: function(){
var grid = new Grid({
store: store,
structure: columns,
modules: [ {
moduleClass: Dod,
showExpando: true,
detailProvider: this.myDetailProvider
}]
});
// .... grid.placeAt() .. grid.startup()
},
myDetailProvider: function(parentGrid, rowId, detailNode, rendered) {
// construct Nested Grid ...
// How to obtain this reference here?
// to access this.array?
rendered.callback();
return rendered;
}
retrun myDeclaring;
}
EDIT:
I have also tried with a static var like:
statics: { array: [] }
But here I will stille need a instance ref to access it.
Try something like this
var myDeclaringClass = declare([_WidgetBase,_TemplatedMixin,_WidgetsInTemplateMixin], {
array: [],
var globalref : this,//here i'm assigning 'this' i.e. class level ref to the variable
initGrid: function(){
var grid = new Grid({
store: store,
structure: columns,
modules: [ {
moduleClass: Dod,
showExpando: true,
detailProvider: this.myDetailProvider
}]
});
// .... grid.placeAt() .. grid.startup()
},
myDetailProvider: function(parentGrid, rowId, detailNode, rendered) {
// construct Nested Grid ...
// How to obtain this reference here?
// to access this.array?
globalref.array//should give you access to the array
rendered.callback();
return rendered;
}
retrun myDeclaring;
}
I'm using Vue and Leaflet for displaying polygons (zones) on a map and display appropriate information (messages) about the specific polygons after clicking on them on the map. The div, where I render the messages in, has the id "#messagearea" and is bound to the "el" object. To display the appropriate messages, I am dependant on the "Zone-id".
Now I also want to display information into another div with a different id. I am also dependant on the "Zone-id" here, so I would like to do this in the same Vue. If I would create another Vue, I would have to render the Leaflet map again to write another polygon.on('click',...) function, which displays appropriate information for the polygons. What is the most elegant and/or easiest way to realize this?
Here my vue object:
var mapVue = new Vue({
el: '#messagearea',
data: {
function() {
return {
map: false
};
},
zones: [],
messages: [],
},
ready: function () {
this.map = L.map('map').setView([51.959, 7.623], 14);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
attribution: '© OpenStreetMap contributors'
}).addTo(this.map);
this.$http.get('/api/zones', function (data) {
this.$set('zones', data);
for (var i = 0; i < this.zones['Zones'].length; i++) {
polygon = L.polygon(
this.zones['Zones'][i]['Geometry']['Coordinates']).addTo(this.map);
polygon.bindPopup(this.zones['Zones'][i]['Name']);
polygon.on('click', messageCallback(i))
// HERE I WOULD LIKE TO ADD THE FUNCTION FOR THE OTHER DIV
}
function messageCallback(i) {
return function () {
mapVue.getMessages(mapVue.zones['Zones'][i]['Zone-id']);
}
}
});
},
methods:
{
getMessages: function (id) {
this.$http.get('/api/messages?zone=' + id, function (data) {
console.log("messages called");
this.$set('messages', data['Messages']);
});
}
}
})
I solved this issue by making use of Vue.component(), the vue.$dispatch() and vue.$broadcast() functions. I just dispatched the zone id to a parent component and then delivered it with the broadcast function to all child components, which are in need of the zone id. Displaying the appropriate messages was no problem then anymore.