Mapbox
kode-eksempel:
"Show and hide layers"
<head>
<meta charset='utf-8' />
<title>Show and hide layers</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v1.5.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v1.5.0/mapbox-gl.css' rel='stylesheet' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
</style>
</head>Mapbox-eksempel:
<body>
<style>
....
</style>
<nav id="menu"></nav>
<div id="map"></div>
<script>
...
</script>
</body>W3Schools:
<style>
#menu {
background: #fff;
position: absolute;
z-index: 1;
top: 10px;
right: 10px;
border-radius: 3px;
width: 120px;
border: 1px solid rgba(0,0,0,0.4);
font-family: 'Open Sans', sans-serif;
}
#menu a {
font-size: 13px;
color: #404040;
display: block;
margin: 0;
padding: 0;
padding: 10px;
text-decoration: none;
border-bottom: 1px solid rgba(0,0,0,0.25);
text-align: center;
}
...
</style>map.on('load', function () {
map.addSource('museums', {
type: 'vector',
url: 'mapbox://mapbox.2opop9hr'
});
map.addLayer({
'id': 'museums',
'type': 'circle',
'source': 'museums',
'layout': {
'visibility': 'visible'
},
'paint': {
'circle-radius': 8,
'circle-color': 'rgba(55,148,179,1)'
},
'source-layer': 'museum-cusco'
});
...
});
var toggleableLayerIds = [ 'contours', 'museums' ];Hva er DOM?
Eloquent JavaScript
3rd edition:
Chapter 14
The Document Object Model
(til og med Trees)
var toggleableLayerIds = [ 'contours', 'museums' ];
for (var i = 0; i < toggleableLayerIds.length; i++) {
var id = toggleableLayerIds[i];
var link = document.createElement('a');
link.href = '#';
link.className = 'active';
link.textContent = id;
....
var layers = document.getElementById('menu');
layers.appendChild(link);
}HTML DOM createElement() Method
https://www.w3schools.com/jsref/met_document_createelement.asp
Kode som legger til lag-menyen i kartet:
link.onclick = function (e) {
var clickedLayer = this.textContent;
e.preventDefault();
e.stopPropagation();
var visibility = map.getLayoutProperty(clickedLayer, 'visibility');
if (visibility === 'visible') {
map.setLayoutProperty(clickedLayer, 'visibility', 'none');
this.className = '';
} else {
this.className = 'active';
map.setLayoutProperty(clickedLayer, 'visibility', 'visible');
}
};Her defineres hva som skal skje når man klikker:
egenskapen visibility endrer verdi fra visible til none - eller motsatt
GEO2311 Mapbox show hide layers
By sverres
GEO2311 Mapbox show hide layers
- 497
