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| /*
* L.ImageOverlay is used to overlay images over the map (to specific geographical bounds).
*/
L.ImageOverlay = L.Class.extend({
includes: L.Mixin.Events,
options: {
opacity: 1
},
initialize: function (url, bounds, options) { // (String, LatLngBounds, Object)
this._url = url;
this._bounds = L.latLngBounds(bounds);
L.setOptions(this, options);
},
onAdd: function (map) {
this._map = map;
if (!this._image) {
this._initImage();
}
map._panes.overlayPane.appendChild(this._image);
map.on('viewreset', this._reset, this);
if (map.options.zoomAnimation && L.Browser.any3d) {
map.on('zoomanim', this._animateZoom, this);
}
this._reset();
},
onRemove: function (map) {
map.getPanes().overlayPane.removeChild(this._image);
map.off('viewreset', this._reset, this);
if (map.options.zoomAnimation) {
map.off('zoomanim', this._animateZoom, this);
}
},
addTo: function (map) {
map.addLayer(this);
return this;
},
setOpacity: function (opacity) {
this.options.opacity = opacity;
this._updateOpacity();
return this;
},
// TODO remove bringToFront/bringToBack duplication from TileLayer/Path
bringToFront: function () {
if (this._image) {
this._map._panes.overlayPane.appendChild(this._image);
}
return this;
},
bringToBack: function () {
var pane = this._map._panes.overlayPane;
if (this._image) {
pane.insertBefore(this._image, pane.firstChild);
}
return this;
},
_initImage: function () {
this._image = L.DomUtil.create('img', 'leaflet-image-layer');
if (this._map.options.zoomAnimation && L.Browser.any3d) {
L.DomUtil.addClass(this._image, 'leaflet-zoom-animated');
} else {
L.DomUtil.addClass(this._image, 'leaflet-zoom-hide');
}
this._updateOpacity();
//TODO createImage util method to remove duplication
L.extend(this._image, {
galleryimg: 'no',
onselectstart: L.Util.falseFn,
onmousemove: L.Util.falseFn,
onload: L.bind(this._onImageLoad, this),
src: this._url
});
},
_animateZoom: function (e) {
var map = this._map,
image = this._image,
scale = map.getZoomScale(e.zoom),
nw = this._bounds.getNorthWest(),
se = this._bounds.getSouthEast(),
topLeft = map._latLngToNewLayerPoint(nw, e.zoom, e.center),
size = map._latLngToNewLayerPoint(se, e.zoom, e.center)._subtract(topLeft),
origin = topLeft._add(size._multiplyBy((1 / 2) * (1 - 1 / scale)));
image.style[L.DomUtil.TRANSFORM] =
L.DomUtil.getTranslateString(origin) + ' scale(' + scale + ') ';
},
_reset: function () {
var image = this._image,
topLeft = this._map.latLngToLayerPoint(this._bounds.getNorthWest()),
size = this._map.latLngToLayerPoint(this._bounds.getSouthEast())._subtract(topLeft);
L.DomUtil.setPosition(image, topLeft);
image.style.width = size.x + 'px';
image.style.height = size.y + 'px';
},
_onImageLoad: function () {
this.fire('load');
},
_updateOpacity: function () {
L.DomUtil.setOpacity(this._image, this.options.opacity);
}
});
L.imageOverlay = function (url, bounds, options) {
return new L.ImageOverlay(url, bounds, options);
};
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