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Path.js
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Path.js
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/*
* L.Path is a base class for rendering vector paths on a map. Inherited by Polyline, Circle, etc.
*/
L.Path = L.Class.extend({
includes: [L.Mixin.Events],
statics: {
// how much to extend the clip area around the map view
// (relative to its size, e.g. 0.5 is half the screen in each direction)
// set it so that SVG element doesn't exceed 1280px (vectors flicker on dragend if it is)
CLIP_PADDING: L.Browser.mobile ?
Math.max(0, Math.min(0.5,
(1280 / Math.max(window.innerWidth, window.innerHeight) - 1) / 2)) : 0.5
},
options: {
stroke: true,
color: '#0033ff',
dashArray: null,
weight: 5,
opacity: 0.5,
fill: false,
fillColor: null, //same as color by default
fillOpacity: 0.2,
clickable: true
},
initialize: function (options) {
L.setOptions(this, options);
},
onAdd: function (map) {
this._map = map;
if (!this._container) {
this._initElements();
this._initEvents();
}
this.projectLatlngs();
this._updatePath();
if (this._container) {
this._map._pathRoot.appendChild(this._container);
}
this.fire('add');
map.on({
'viewreset': this.projectLatlngs,
'moveend': this._updatePath
}, this);
},
addTo: function (map) {
map.addLayer(this);
return this;
},
onRemove: function (map) {
map._pathRoot.removeChild(this._container);
// Need to fire remove event before we set _map to null as the event hooks might need the object
this.fire('remove');
this._map = null;
if (L.Browser.vml) {
this._container = null;
this._stroke = null;
this._fill = null;
}
map.off({
'viewreset': this.projectLatlngs,
'moveend': this._updatePath
}, this);
},
projectLatlngs: function () {
// do all projection stuff here
},
setStyle: function (style) {
L.setOptions(this, style);
if (this._container) {
this._updateStyle();
}
return this;
},
redraw: function () {
if (this._map) {
this.projectLatlngs();
this._updatePath();
}
return this;
}
});
L.Map.include({
_updatePathViewport: function () {
var p = L.Path.CLIP_PADDING,
size = this.getSize(),
panePos = L.DomUtil.getPosition(this._mapPane),
min = panePos.multiplyBy(-1)._subtract(size.multiplyBy(p)._round()),
max = min.add(size.multiplyBy(1 + p * 2)._round());
this._pathViewport = new L.Bounds(min, max);
}
});