mappe per georeferenziazione
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L.Control.Basemaps = L.Control.extend({
_map: null,
includes: L.Evented ? L.Evented.prototype : L.Mixin.Event,
options: {
position: "bottomleft",
tileX: 0,
tileY: 0,
tileZ: 0,
layers: [] // list of basemap layer objects, first in list is default and added to map with this control
},
basemap: null,
onAdd: function(map) {
this._map = map;
var container = L.DomUtil.create("div", "basemaps leaflet-control closed");
// disable events
L.DomEvent.disableClickPropagation(container);
if (!L.Browser.touch) {
L.DomEvent.disableScrollPropagation(container);
}
this.options.basemaps.forEach(function(d, i) {
var basemapClass = "basemap";
if (i === 0) {
this.basemap = d;
this._map.addLayer(d);
basemapClass += " active";
} else if (i === 1) {
basemapClass += " alt";
}
var url;
if (d.options.iconURL) {
url = d.options.iconURL;
} else {
var coords = { x: this.options.tileX, y: this.options.tileY };
url = L.Util.template(
d._url,
L.extend(
{
s: d._getSubdomain(coords),
x: coords.x,
y: d.options.tms ? d._globalTileRange.max.y - coords.y : coords.y,
z: this.options.tileZ
},
d.options
)
);
if (d instanceof L.TileLayer.WMS) {
// d may not yet be initialized, yet functions below expect ._map to be set
d._map = map;
// unfortunately, calling d.getTileUrl() does not work due to scope issues
// have to replicate some of the logic from L.TileLayer.WMS
// adapted from L.TileLayer.WMS::onAdd
var crs = d.options.crs || map.options.crs;
var wmsParams = L.extend({}, d.wmsParams);
var wmsVersion = parseFloat(wmsParams.version);
var projectionKey = wmsVersion >= 1.3 ? "crs" : "srs";
wmsParams[projectionKey] = crs.code;
// adapted from L.TileLayer.WMS::getTileUrl
var coords2 = L.point(coords);
coords2.z = this.options.tileZ;
var tileBounds = d._tileCoordsToBounds(coords2);
var nw = crs.project(tileBounds.getNorthWest());
var se = crs.project(tileBounds.getSouthEast());
var bbox = (wmsVersion >= 1.3 && crs === L.CRS.EPSG4326
? [se.y, nw.x, nw.y, se.x]
: [nw.x, se.y, se.x, nw.y]
).join(",");
url +=
L.Util.getParamString(wmsParams, url, d.options.uppercase) +
(d.options.uppercase ? "&BBOX=" : "&bbox=") +
bbox;
}
}
var basemapNode = L.DomUtil.create("div", basemapClass, container);
var imgNode = L.DomUtil.create("img", null, basemapNode);
imgNode.src = url;
if (d.options && d.options.label) {
imgNode.title = d.options.label;
}
L.DomEvent.on(
basemapNode,
"click",
function() {
// intercept open click on mobile devices and show options
if (this.options.basemaps.length > 2 && L.Browser.mobile) {
if (L.DomUtil.hasClass(container, "closed")) {
L.DomUtil.removeClass(container, "closed");
return;
}
}
//if different, remove previous basemap, and add new one
if (d != this.basemap) {
map.removeLayer(this.basemap);
map.addLayer(d);
d.bringToBack();
map.fire("baselayerchange", d);
this.basemap = d;
L.DomUtil.removeClass(container.getElementsByClassName("basemap active")[0], "active");
L.DomUtil.addClass(basemapNode, "active");
var altIdx = (i + 1) % this.options.basemaps.length;
L.DomUtil.removeClass(container.getElementsByClassName("basemap alt")[0], "alt");
L.DomUtil.addClass(container.getElementsByClassName("basemap")[altIdx], "alt");
L.DomUtil.addClass(container, "closed");
}
},
this
);
}, this);
if (this.options.basemaps.length > 2 && !L.Browser.mobile) {
L.DomEvent.on(
container,
"mouseenter",
function() {
L.DomUtil.removeClass(container, "closed");
},
this
);
L.DomEvent.on(
container,
"mouseleave",
function() {
L.DomUtil.addClass(container, "closed");
},
this
);
}
this._container = container;
return this._container;
}
});
L.control.basemaps = function(options) {
return new L.Control.Basemaps(options);
};