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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2504 | - | 1 | L.Control.Locate = L.Control.extend({ |
| 2 | options: { |
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| 3 | position: 'topleft', |
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| 4 | drawCircle: true, |
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| 5 | follow: false, // follow with zoom and pan the user's location |
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| 6 | // range circle |
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| 7 | circleStyle: { |
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| 8 | color: '#136AEC', |
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| 9 | fillColor: '#136AEC', |
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| 10 | fillOpacity: 0.15, |
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| 11 | weight: 2, |
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| 12 | opacity: 0.5 |
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| 13 | }, |
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| 14 | // inner marker |
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| 15 | markerStyle: { |
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| 16 | color: '#136AEC', |
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| 17 | fillColor: '#2A93EE', |
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| 18 | fillOpacity: 0.7, |
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| 19 | weight: 2, |
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| 20 | opacity: 0.9, |
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| 21 | radius: 4 |
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| 22 | }, |
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| 23 | metric: true, |
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| 24 | debug: false, |
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| 25 | onLocationError: function(err) { |
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| 26 | alert(err.message); |
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| 27 | }, |
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| 28 | title: "Show me where I am", |
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| 29 | popupText: ["You are within ", " from this point"], |
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| 30 | setView: true, // automatically sets the map view to the user's location |
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| 31 | locateOptions: {} |
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| 32 | }, |
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| 33 | |||
| 34 | onAdd: function (map) { |
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| 35 | var className = 'leaflet-control-locate', |
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| 36 | classNames = className + ' leaflet-control-zoom leaflet-bar leaflet-control', |
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| 37 | container = L.DomUtil.create('div', classNames); |
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| 38 | |||
| 39 | var self = this; |
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| 40 | this._layer = new L.LayerGroup(); |
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| 41 | this._layer.addTo(map); |
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| 42 | this._event = undefined; |
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| 43 | // nested extend so that the first can overwrite the second |
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| 44 | // and the second can overwrite the third |
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| 45 | this._locateOptions = L.extend(L.extend({ |
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| 46 | 'setView': false // have to set this to false because we have to |
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| 47 | // do setView manually |
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| 48 | }, this.options.locateOptions), { |
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| 49 | 'watch': true // if you overwrite this, visualization cannot be updated |
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| 50 | }); |
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| 51 | |||
| 52 | var link = L.DomUtil.create('a', 'leaflet-bar-part leaflet-bar-part-single', container); |
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| 53 | link.href = '#'; |
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| 54 | link.title = this.options.title; |
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| 55 | |||
| 56 | var _log = function(data) { |
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| 57 | if (self.options.debug) { |
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| 58 | console.log(data); |
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| 59 | } |
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| 60 | }; |
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| 61 | |||
| 62 | L.DomEvent |
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| 63 | .on(link, 'click', L.DomEvent.stopPropagation) |
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| 64 | .on(link, 'click', L.DomEvent.preventDefault) |
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| 65 | .on(link, 'click', function() { |
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| 66 | if (self._active && (map.getBounds().contains(self._event.latlng) || !self.options.setView)) { |
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| 67 | stopLocate(); |
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| 68 | } else { |
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| 69 | if (self.options.setView) { |
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| 70 | self._locateOnNextLocationFound = true; |
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| 71 | } |
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| 72 | if(!self._active) { |
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| 73 | map.locate(self._locateOptions); |
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| 74 | } |
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| 75 | self._active = true; |
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| 76 | if (!self._event) { |
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| 77 | self._container.className = classNames + " requesting"; |
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| 78 | } else { |
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| 79 | visualizeLocation(); |
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| 80 | } |
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| 81 | } |
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| 82 | }) |
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| 83 | .on(link, 'dblclick', L.DomEvent.stopPropagation); |
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| 84 | |||
| 85 | var onLocationFound = function (e) { |
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| 86 | _log('onLocationFound'); |
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| 87 | |||
| 88 | self._active = true; |
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| 89 | |||
| 90 | if (self._event && |
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| 91 | (self._event.latlng.lat != e.latlng.lat || |
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| 92 | self._event.latlng.lng != e.latlng.lng)) { |
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| 93 | _log('location has changed'); |
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| 94 | } |
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| 95 | |||
| 96 | self._event = e; |
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| 97 | |||
| 98 | if (self.options.follow) { |
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| 99 | self._locateOnNextLocationFound = true; |
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| 100 | } |
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| 101 | |||
| 102 | visualizeLocation(); |
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| 103 | }; |
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| 104 | |||
| 105 | var visualizeLocation = function() { |
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| 106 | _log('visualizeLocation,' + 'setView:' + self._locateOnNextLocationFound); |
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| 107 | |||
| 108 | var radius = self._event.accuracy / 2; |
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| 109 | |||
| 110 | if (self._locateOnNextLocationFound) { |
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| 111 | map.fitBounds(self._event.bounds); |
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| 112 | self._locateOnNextLocationFound = false; |
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| 113 | } |
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| 114 | |||
| 115 | self._layer.clearLayers(); |
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| 116 | |||
| 117 | // circle with the radius of the location's accuracy |
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| 118 | if (self.options.drawCircle) { |
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| 119 | L.circle(self._event.latlng, radius, self.options.circleStyle) |
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| 120 | .addTo(self._layer); |
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| 121 | } |
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| 122 | |||
| 123 | var distance, unit; |
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| 124 | if (self.options.metric) { |
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| 125 | distance = radius.toFixed(0); |
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| 126 | unit = "meters"; |
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| 127 | } else { |
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| 128 | distance = (radius * 3.2808399).toFixed(0); |
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| 129 | unit = "feet"; |
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| 130 | } |
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| 131 | |||
| 132 | // small inner marker |
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| 133 | var t = self.options.popupText; |
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| 134 | L.circleMarker(self._event.latlng, self.options.markerStyle) |
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| 135 | .bindPopup(t[0] + distance + " " + unit + t[1]) |
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| 136 | .addTo(self._layer); |
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| 137 | |||
| 138 | if (!self._container) |
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| 139 | return; |
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| 140 | self._container.className = classNames + " active"; |
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| 141 | }; |
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| 142 | |||
| 143 | var resetVariables = function() { |
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| 144 | self._active = false; |
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| 145 | self._locateOnNextLocationFound = true; |
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| 146 | }; |
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| 147 | |||
| 148 | resetVariables(); |
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| 149 | |||
| 150 | var stopLocate = function() { |
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| 151 | _log('stopLocate'); |
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| 152 | map.stopLocate(); |
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| 153 | |||
| 154 | self._container.className = classNames; |
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| 155 | resetVariables(); |
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| 156 | |||
| 157 | self._layer.clearLayers(); |
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| 158 | }; |
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| 159 | |||
| 160 | |||
| 161 | var onLocationError = function (err) { |
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| 162 | _log('onLocationError'); |
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| 163 | |||
| 164 | // ignore timeout error if the location is watched |
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| 165 | if (err.code==3 && this._locateOptions.watch) { |
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| 166 | return; |
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| 167 | } |
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| 168 | |||
| 169 | stopLocate(); |
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| 170 | self.options.onLocationError(err); |
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| 171 | }; |
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| 172 | |||
| 173 | // event hooks |
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| 174 | map.on('locationfound', onLocationFound, self); |
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| 175 | map.on('locationerror', onLocationError, self); |
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| 176 | |||
| 177 | return container; |
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| 178 | } |
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| 179 | }); |
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| 180 | |||
| 181 | L.Map.addInitHook(function () { |
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| 182 | if (this.options.locateControl) { |
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| 183 | this.locateControl = L.control.locate(); |
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| 184 | this.addControl(this.locateControl); |
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| 185 | } |
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| 186 | }); |
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| 187 | |||
| 188 | L.control.locate = function (options) { |
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| 189 | return new L.Control.Locate(options); |
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| 190 | }; |