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81 lines
2.6 KiB
81 lines
2.6 KiB
L.TileLayer.BetterWMS = L.TileLayer.WMS.extend({ |
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onAdd: function (map) { |
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// Triggered when the layer is added to a map. |
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// Register a click listener, then do all the upstream WMS things |
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L.TileLayer.WMS.prototype.onAdd.call(this, map); |
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map.on('click', this.getFeatureInfo, this); |
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}, |
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onRemove: function (map) { |
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// Triggered when the layer is removed from a map. |
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// Unregister a click listener, then do all the upstream WMS things |
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L.TileLayer.WMS.prototype.onRemove.call(this, map); |
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map.off('click', this.getFeatureInfo, this); |
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}, |
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getFeatureInfo: function (evt) { |
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// Make an AJAX request to the server and hope for the best |
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var url = this.getFeatureInfoUrl(evt.latlng), |
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showResults = L.Util.bind(this.showGetFeatureInfo, this); |
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$.ajax({ |
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url: url, |
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success: function (data, status, xhr) { |
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var err = typeof data === 'string' ? null : data; |
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showResults(err, evt.latlng, data); |
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}, |
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error: function (xhr, status, error) { |
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showResults(error); |
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} |
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}); |
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}, |
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getFeatureInfoUrl: function (latlng) { |
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// Construct a GetFeatureInfo request URL given a point |
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var point = this._map.latLngToContainerPoint(latlng, this._map.getZoom()), |
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size = this._map.getSize(), |
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params = { |
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request: 'GetFeatureInfo', |
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service: 'WMS', |
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srs: 'EPSG:4326', |
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styles: this.wmsParams.styles, |
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transparent: this.wmsParams.transparent, |
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version: this.wmsParams.version, |
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format: this.wmsParams.format, |
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bbox: this._map.getBounds().toBBoxString(), |
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height: size.y, |
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width: size.x, |
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layers: this.wmsParams.layers, |
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query_layers: this.wmsParams.layers, |
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info_format: 'application/json' //'text/html' |
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}; |
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// To solve the bug of incorrect X and Y |
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const X = point.x.toFixed(); |
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const Y = point.y.toFixed(); |
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params[params.version === '1.3.0' ? 'i' : 'x'] = X //point.x; |
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params[params.version === '1.3.0' ? 'j' : 'y'] = Y //point.y; |
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return this._url + L.Util.getParamString(params, this._url, true); |
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}, |
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showGetFeatureInfo: function (err, latlng, content) { |
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if (err) { console.log(err); return; } // do nothing if there's an error |
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const properties = JSON.parse(content).features[0].properties; |
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console.debug('betterwms properties: ', properties); |
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// if belongs to grid layer treat it as an entity |
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if (properties.hasOwnProperty('cellcode')) { |
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moreInfoPopup(properties); |
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} else { |
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mruPopup(properties); |
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} |
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} |
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}); |
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L.tileLayer.betterWms = function (url, options) { |
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return new L.TileLayer.BetterWMS(url, options); |
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};
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