[76] | 1 | /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for |
---|
| 2 | * full list of contributors). Published under the Clear BSD license. |
---|
| 3 | * See http://svn.openlayers.org/trunk/openlayers/license.txt for the |
---|
| 4 | * full text of the license. */ |
---|
| 5 | |
---|
| 6 | /** |
---|
| 7 | * @requires OpenLayers/Control.js |
---|
| 8 | * @requires OpenLayers/Layer/WMS/Post.js |
---|
| 9 | * @requires OpenLayers/Handler/RegularPolygon.js |
---|
| 10 | * @requires OpenLayers/Handler/Polygon.js |
---|
| 11 | * @requires OpenLayers/Handler/Path.js |
---|
| 12 | * @requires OpenLayers/Handler/Click.js |
---|
| 13 | * @requires OpenLayers/Filter/Spatial.js |
---|
| 14 | */ |
---|
| 15 | |
---|
| 16 | /** |
---|
| 17 | * Class: OpenLayers.Control.SLDSelect |
---|
| 18 | * Perform selections on WMS layers using Styled Layer Descriptor (SLD) |
---|
| 19 | * |
---|
| 20 | * Inherits from: |
---|
| 21 | * - <OpenLayers.Control> |
---|
| 22 | */ |
---|
| 23 | OpenLayers.Control.SLDSelect = OpenLayers.Class(OpenLayers.Control, { |
---|
| 24 | |
---|
| 25 | /** |
---|
| 26 | * Constant: EVENT_TYPES |
---|
| 27 | * {Array(String)} Supported application event types. Register a listener |
---|
| 28 | * for a particular event with the following syntax: |
---|
| 29 | * (code) |
---|
| 30 | * control.events.register(type, obj, listener); |
---|
| 31 | * (end) |
---|
| 32 | * |
---|
| 33 | * Listeners will be called with a reference to an event object. The |
---|
| 34 | * properties of this event depends on exactly what happened. |
---|
| 35 | * |
---|
| 36 | * Supported control event types (in addition to those from |
---|
| 37 | * <OpenLayers.Control>): |
---|
| 38 | * selected - Triggered when a selection occurs. Listeners receive an |
---|
| 39 | * event with *filters* and *layer* properties. Filters will be an |
---|
| 40 | * array of OpenLayers.Filter objects created in order to perform |
---|
| 41 | * the particular selection. |
---|
| 42 | */ |
---|
| 43 | EVENT_TYPES: ["selected"], |
---|
| 44 | |
---|
| 45 | /** |
---|
| 46 | * APIProperty: clearOnDeactivate |
---|
| 47 | * {Boolean} Should the selection be cleared when the control is |
---|
| 48 | * deactivated. Default value is false. |
---|
| 49 | */ |
---|
| 50 | clearOnDeactivate: false, |
---|
| 51 | |
---|
| 52 | /** |
---|
| 53 | * APIProperty: layers |
---|
| 54 | * {Array(<OpenLayers.Layer.WMS>)} The WMS layers this control will work |
---|
| 55 | * on. |
---|
| 56 | */ |
---|
| 57 | layers: null, |
---|
| 58 | |
---|
| 59 | /** |
---|
| 60 | * Property: callbacks |
---|
| 61 | * {Object} The functions that are sent to the handler for callback |
---|
| 62 | */ |
---|
| 63 | callbacks: null, |
---|
| 64 | |
---|
| 65 | /** |
---|
| 66 | * APIProperty: selectionSymbolizer |
---|
| 67 | * {Object} Determines the styling of the selected objects. Default is |
---|
| 68 | * a selection in red. |
---|
| 69 | */ |
---|
| 70 | selectionSymbolizer: { |
---|
| 71 | 'Polygon': {fillColor: '#FF0000', stroke: false}, |
---|
| 72 | 'Line': {strokeColor: '#FF0000', strokeWidth: 2}, |
---|
| 73 | 'Point': {graphicName: 'square', fillColor: '#FF0000', pointRadius: 5} |
---|
| 74 | }, |
---|
| 75 | |
---|
| 76 | /** |
---|
| 77 | * APIProperty: layerOptions |
---|
| 78 | * {Object} The options to apply to the selection layer, by default the |
---|
| 79 | * selection layer will be kept out of the layer switcher. |
---|
| 80 | */ |
---|
| 81 | layerOptions: null, |
---|
| 82 | |
---|
| 83 | /** |
---|
| 84 | * APIProperty: handlerOptions |
---|
| 85 | * {Object} Used to set non-default properties on the control's handler |
---|
| 86 | */ |
---|
| 87 | handlerOptions: null, |
---|
| 88 | |
---|
| 89 | /** |
---|
| 90 | * APIProperty: sketchStyle |
---|
| 91 | * {<OpenLayers.Style>|Object} Style or symbolizer to use for the sketch |
---|
| 92 | * handler. The recommended way of styling the sketch layer, however, is |
---|
| 93 | * to configure an <OpenLayers.StyleMap> in the layerOptions of the |
---|
| 94 | * <handlerOptions>: |
---|
| 95 | * |
---|
| 96 | * (code) |
---|
| 97 | * new OpenLayers.Control.SLDSelect(OpenLayers.Handler.Path, { |
---|
| 98 | * handlerOptions: { |
---|
| 99 | * layerOptions: { |
---|
| 100 | * styleMap: new OpenLayers.StyleMap({ |
---|
| 101 | * "default": {strokeColor: "yellow"} |
---|
| 102 | * }); |
---|
| 103 | * } |
---|
| 104 | * } |
---|
| 105 | * }); |
---|
| 106 | * (end) |
---|
| 107 | */ |
---|
| 108 | sketchStyle: null, |
---|
| 109 | |
---|
| 110 | /** |
---|
| 111 | * APIProperty: wfsCache |
---|
| 112 | * {Object} Cache to use for storing parsed results from |
---|
| 113 | * <OpenLayers.Format.WFSDescribeFeatureType.read>. If not provided, |
---|
| 114 | * these will be cached on the prototype. |
---|
| 115 | */ |
---|
| 116 | wfsCache: {}, |
---|
| 117 | |
---|
| 118 | /** |
---|
| 119 | * APIProperty: layerCache |
---|
| 120 | * {Object} Cache to use for storing references to the selection layers. |
---|
| 121 | * Normally each source layer will have exactly 1 selection layer of |
---|
| 122 | * type OpenLayers.Layer.WMS.Post. If not provided, layers will |
---|
| 123 | * be cached on the prototype. Note that if <clearOnDeactivate> is |
---|
| 124 | * true, the layer will no longer be cached after deactivating the |
---|
| 125 | * control. |
---|
| 126 | */ |
---|
| 127 | layerCache: {}, |
---|
| 128 | |
---|
| 129 | /** |
---|
| 130 | * Constructor: OpenLayers.Control.SLDSelect |
---|
| 131 | * Create a new control for selecting features in WMS layers using |
---|
| 132 | * Styled Layer Descriptor (SLD). |
---|
| 133 | * |
---|
| 134 | * Parameters: |
---|
| 135 | * handler - {<OpenLayers.Class>} A sketch handler class. This determines |
---|
| 136 | * the type of selection, e.g. box (<OpenLayers.Handler.Box>), point |
---|
| 137 | * (<OpenLayers.Handler.Point>), path (<OpenLayers.Handler.Path>) or |
---|
| 138 | * polygon (<OpenLayers.Handler.Polygon>) selection. To use circle |
---|
| 139 | * type selection, use <OpenLayers.Handler.RegularPolygon> and pass |
---|
| 140 | * the number of desired sides (e.g. 40) as "sides" property to the |
---|
| 141 | * <handlerOptions>. |
---|
| 142 | * options - {Object} An object containing all configuration properties for |
---|
| 143 | * the control. |
---|
| 144 | * |
---|
| 145 | * Valid options: |
---|
| 146 | * layers - Array({<OpenLayers.Layer.WMS>}) The layers to perform the |
---|
| 147 | * selection on. |
---|
| 148 | */ |
---|
| 149 | initialize: function(handler, options) { |
---|
| 150 | // concatenate events specific to this control with those from the base |
---|
| 151 | this.EVENT_TYPES = |
---|
| 152 | OpenLayers.Control.SLDSelect.prototype.EVENT_TYPES.concat( |
---|
| 153 | OpenLayers.Control.prototype.EVENT_TYPES |
---|
| 154 | ); |
---|
| 155 | OpenLayers.Control.prototype.initialize.apply(this, [options]); |
---|
| 156 | |
---|
| 157 | this.callbacks = OpenLayers.Util.extend({done: this.select, |
---|
| 158 | click: this.select}, this.callbacks); |
---|
| 159 | this.handlerOptions = this.handlerOptions || {}; |
---|
| 160 | this.layerOptions = OpenLayers.Util.applyDefaults(this.layerOptions, { |
---|
| 161 | displayInLayerSwitcher: false |
---|
| 162 | }); |
---|
| 163 | if (this.sketchStyle) { |
---|
| 164 | this.handlerOptions.layerOptions = OpenLayers.Util.applyDefaults( |
---|
| 165 | this.handlerOptions.layerOptions, |
---|
| 166 | {styleMap: new OpenLayers.StyleMap({"default": this.sketchStyle})} |
---|
| 167 | ); |
---|
| 168 | } |
---|
| 169 | this.handler = new handler(this, this.callbacks, this.handlerOptions); |
---|
| 170 | }, |
---|
| 171 | |
---|
| 172 | /** |
---|
| 173 | * APIMethod: destroy |
---|
| 174 | * Take care of things that are not handled in superclass. |
---|
| 175 | */ |
---|
| 176 | destroy: function() { |
---|
| 177 | for (var key in this.layerCache) { |
---|
| 178 | delete this.layerCache[key]; |
---|
| 179 | } |
---|
| 180 | for (var key in this.wfsCache) { |
---|
| 181 | delete this.wfsCache[key]; |
---|
| 182 | } |
---|
| 183 | OpenLayers.Control.prototype.destroy.apply(this, arguments); |
---|
| 184 | }, |
---|
| 185 | |
---|
| 186 | /** |
---|
| 187 | * Method: coupleLayerVisiblity |
---|
| 188 | * Couple the selection layer and the source layer with respect to |
---|
| 189 | * layer visibility. So if the source layer is turned off, the |
---|
| 190 | * selection layer is also turned off. |
---|
| 191 | * |
---|
| 192 | * Parameters: |
---|
| 193 | * evt - {Object} |
---|
| 194 | */ |
---|
| 195 | coupleLayerVisiblity: function(evt) { |
---|
| 196 | this.setVisibility(evt.object.getVisibility()); |
---|
| 197 | }, |
---|
| 198 | |
---|
| 199 | /** |
---|
| 200 | * Method: createSelectionLayer |
---|
| 201 | * Creates a "clone" from the source layer in which the selection can |
---|
| 202 | * be drawn. This ensures both the source layer and the selection are |
---|
| 203 | * visible and not only the selection. |
---|
| 204 | * |
---|
| 205 | * Parameters: |
---|
| 206 | * source - {<OpenLayers.Layer.WMS>} The source layer on which the selection |
---|
| 207 | * is performed. |
---|
| 208 | * |
---|
| 209 | * Returns: |
---|
| 210 | * {<OpenLayers.Layer.WMS.Post>} A WMS Post layer since SLD selections can |
---|
| 211 | * easily get quite long. |
---|
| 212 | */ |
---|
| 213 | createSelectionLayer: function(source) { |
---|
| 214 | // check if we already have a selection layer for the source layer |
---|
| 215 | var selectionLayer; |
---|
| 216 | if (!this.layerCache[source.id]) { |
---|
| 217 | selectionLayer = new OpenLayers.Layer.WMS.Post(source.name, |
---|
| 218 | source.url, source.params, |
---|
| 219 | OpenLayers.Util.applyDefaults( |
---|
| 220 | this.layerOptions, |
---|
| 221 | source.getOptions()) |
---|
| 222 | ); |
---|
| 223 | this.layerCache[source.id] = selectionLayer; |
---|
| 224 | // make sure the layers are coupled wrt visibility, but only |
---|
| 225 | // if they are not displayed in the layer switcher, because in |
---|
| 226 | // that case the user cannot control visibility. |
---|
| 227 | if (this.layerOptions.displayInLayerSwitcher === false) { |
---|
| 228 | source.events.on({ |
---|
| 229 | "visibilitychanged": this.coupleLayerVisiblity, |
---|
| 230 | scope: selectionLayer}); |
---|
| 231 | } |
---|
| 232 | this.map.addLayer(selectionLayer); |
---|
| 233 | } else { |
---|
| 234 | selectionLayer = this.layerCache[source.id]; |
---|
| 235 | } |
---|
| 236 | return selectionLayer; |
---|
| 237 | }, |
---|
| 238 | |
---|
| 239 | /** |
---|
| 240 | * Method: createSLD |
---|
| 241 | * Create the SLD document for the layer using the supplied filters. |
---|
| 242 | * |
---|
| 243 | * Parameters: |
---|
| 244 | * layer - {<OpenLayers.Layer.WMS>} |
---|
| 245 | * filters - Array({<OpenLayers.Filter>}) The filters to be applied. |
---|
| 246 | * geometryAttributes - Array({Object}) The geometry attributes of the |
---|
| 247 | * layer. |
---|
| 248 | * |
---|
| 249 | * Returns: |
---|
| 250 | * {String} The SLD document generated as a string. |
---|
| 251 | */ |
---|
| 252 | createSLD: function(layer, filters, geometryAttributes) { |
---|
| 253 | var sld = {version: "1.0.0", namedLayers: {}}; |
---|
| 254 | var layerNames = [layer.params.LAYERS].join(",").split(","); |
---|
| 255 | for (var i=0, len=layerNames.length; i<len; i++) { |
---|
| 256 | var name = layerNames[i]; |
---|
| 257 | sld.namedLayers[name] = {name: name, userStyles: []}; |
---|
| 258 | var symbolizer = this.selectionSymbolizer; |
---|
| 259 | var geometryAttribute = geometryAttributes[i]; |
---|
| 260 | if (geometryAttribute.type.indexOf('Polygon') >= 0) { |
---|
| 261 | symbolizer = {Polygon: this.selectionSymbolizer['Polygon']}; |
---|
| 262 | } else if (geometryAttribute.type.indexOf('LineString') >= 0) { |
---|
| 263 | symbolizer = {Line: this.selectionSymbolizer['Line']}; |
---|
| 264 | } else if (geometryAttribute.type.indexOf('Point') >= 0) { |
---|
| 265 | symbolizer = {Point: this.selectionSymbolizer['Point']}; |
---|
| 266 | } |
---|
| 267 | var filter = filters[i]; |
---|
| 268 | sld.namedLayers[name].userStyles.push({name: 'default', rules: [ |
---|
| 269 | new OpenLayers.Rule({symbolizer: symbolizer, |
---|
| 270 | filter: filter, |
---|
| 271 | maxScaleDenominator: layer.options.minScale}) |
---|
| 272 | ]}); |
---|
| 273 | } |
---|
| 274 | return new OpenLayers.Format.SLD().write(sld); |
---|
| 275 | }, |
---|
| 276 | |
---|
| 277 | /** |
---|
| 278 | * Method: parseDescribeLayer |
---|
| 279 | * Parse the SLD WMS DescribeLayer response and issue the corresponding |
---|
| 280 | * WFS DescribeFeatureType request |
---|
| 281 | * |
---|
| 282 | * request - {XMLHttpRequest} The request object. |
---|
| 283 | */ |
---|
| 284 | parseDescribeLayer: function(request) { |
---|
| 285 | var format = new OpenLayers.Format.WMSDescribeLayer(); |
---|
| 286 | var doc = request.responseXML; |
---|
| 287 | if(!doc || !doc.documentElement) { |
---|
| 288 | doc = request.responseText; |
---|
| 289 | } |
---|
| 290 | var describeLayer = format.read(doc); |
---|
| 291 | var typeNames = []; |
---|
| 292 | var url = null; |
---|
| 293 | for (var i=0, len=describeLayer.length; i<len; i++) { |
---|
| 294 | // perform a WFS DescribeFeatureType request |
---|
| 295 | if (describeLayer[i].owsType == "WFS") { |
---|
| 296 | typeNames.push(describeLayer[i].typeName); |
---|
| 297 | url = describeLayer[i].owsURL; |
---|
| 298 | } |
---|
| 299 | } |
---|
| 300 | var options = { |
---|
| 301 | url: url, |
---|
| 302 | params: { |
---|
| 303 | SERVICE: "WFS", |
---|
| 304 | TYPENAME: typeNames.toString(), |
---|
| 305 | REQUEST: "DescribeFeatureType", |
---|
| 306 | VERSION: "1.0.0" |
---|
| 307 | }, |
---|
| 308 | callback: function(request) { |
---|
| 309 | var format = new OpenLayers.Format.WFSDescribeFeatureType(); |
---|
| 310 | var doc = request.responseXML; |
---|
| 311 | if(!doc || !doc.documentElement) { |
---|
| 312 | doc = request.responseText; |
---|
| 313 | } |
---|
| 314 | var describeFeatureType = format.read(doc); |
---|
| 315 | this.control.wfsCache[this.layer.id] = describeFeatureType; |
---|
| 316 | this.control._queue && this.control.applySelection(); |
---|
| 317 | }, |
---|
| 318 | scope: this |
---|
| 319 | }; |
---|
| 320 | OpenLayers.Request.GET(options); |
---|
| 321 | }, |
---|
| 322 | |
---|
| 323 | /** |
---|
| 324 | * Method: getGeometryAttributes |
---|
| 325 | * Look up the geometry attributes from the WFS DescribeFeatureType response |
---|
| 326 | * |
---|
| 327 | * Parameters: |
---|
| 328 | * layer - {<OpenLayers.Layer.WMS>} The layer for which to look up the |
---|
| 329 | * geometry attributes. |
---|
| 330 | * |
---|
| 331 | * Returns: |
---|
| 332 | * Array({Object}) Array of geometry attributes |
---|
| 333 | */ |
---|
| 334 | getGeometryAttributes: function(layer) { |
---|
| 335 | var result = []; |
---|
| 336 | var cache = this.wfsCache[layer.id]; |
---|
| 337 | for (var i=0, len=cache.featureTypes.length; i<len; i++) { |
---|
| 338 | var typeName = cache.featureTypes[i]; |
---|
| 339 | var properties = typeName.properties; |
---|
| 340 | for (var j=0, lenj=properties.length; j < lenj; j++) { |
---|
| 341 | var property = properties[j]; |
---|
| 342 | var type = property.type; |
---|
| 343 | if ((type.indexOf('LineString') >= 0) || |
---|
| 344 | (type.indexOf('GeometryAssociationType') >=0) || |
---|
| 345 | (type.indexOf('GeometryPropertyType') >= 0) || |
---|
| 346 | (type.indexOf('Point') >= 0) || |
---|
| 347 | (type.indexOf('Polygon') >= 0) ) { |
---|
| 348 | result.push(property); |
---|
| 349 | } |
---|
| 350 | } |
---|
| 351 | } |
---|
| 352 | return result; |
---|
| 353 | }, |
---|
| 354 | |
---|
| 355 | /** |
---|
| 356 | * APIMethod: activate |
---|
| 357 | * Activate the control. Activating the control will perform a SLD WMS |
---|
| 358 | * DescribeLayer request followed by a WFS DescribeFeatureType request |
---|
| 359 | * so that the proper symbolizers can be chosen based on the geometry |
---|
| 360 | * type. |
---|
| 361 | */ |
---|
| 362 | activate: function() { |
---|
| 363 | var activated = OpenLayers.Control.prototype.activate.call(this); |
---|
| 364 | if(activated) { |
---|
| 365 | for (var i=0, len=this.layers.length; i<len; i++) { |
---|
| 366 | var layer = this.layers[i]; |
---|
| 367 | if (layer && !this.wfsCache[layer.id]) { |
---|
| 368 | var options = { |
---|
| 369 | url: layer.url, |
---|
| 370 | params: { |
---|
| 371 | SERVICE: "WMS", |
---|
| 372 | VERSION: layer.params.VERSION, |
---|
| 373 | LAYERS: layer.params.LAYERS, |
---|
| 374 | REQUEST: "DescribeLayer" |
---|
| 375 | }, |
---|
| 376 | callback: this.parseDescribeLayer, |
---|
| 377 | scope: {layer: layer, control: this} |
---|
| 378 | }; |
---|
| 379 | OpenLayers.Request.GET(options); |
---|
| 380 | } |
---|
| 381 | } |
---|
| 382 | } |
---|
| 383 | return activated; |
---|
| 384 | }, |
---|
| 385 | |
---|
| 386 | /** |
---|
| 387 | * APIMethod: deactivate |
---|
| 388 | * Deactivate the control. If clearOnDeactivate is true, remove the |
---|
| 389 | * selection layer(s). |
---|
| 390 | */ |
---|
| 391 | deactivate: function() { |
---|
| 392 | var deactivated = OpenLayers.Control.prototype.deactivate.call(this); |
---|
| 393 | if(deactivated) { |
---|
| 394 | for (var i=0, len=this.layers.length; i<len; i++) { |
---|
| 395 | var layer = this.layers[i]; |
---|
| 396 | if (layer && this.clearOnDeactivate === true) { |
---|
| 397 | var layerCache = this.layerCache; |
---|
| 398 | var selectionLayer = layerCache[layer.id]; |
---|
| 399 | if (selectionLayer) { |
---|
| 400 | layer.events.un({ |
---|
| 401 | "visibilitychanged": this.coupleLayerVisiblity, |
---|
| 402 | scope: selectionLayer}); |
---|
| 403 | selectionLayer.destroy(); |
---|
| 404 | delete layerCache[layer.id]; |
---|
| 405 | } |
---|
| 406 | } |
---|
| 407 | } |
---|
| 408 | } |
---|
| 409 | return deactivated; |
---|
| 410 | }, |
---|
| 411 | |
---|
| 412 | /** |
---|
| 413 | * APIMethod: setLayers |
---|
| 414 | * Set the layers on which the selection should be performed. Call the |
---|
| 415 | * setLayers method if the layer(s) to be used change and the same |
---|
| 416 | * control should be used on a new set of layers. |
---|
| 417 | * If the control is already active, it will be active after the new |
---|
| 418 | * set of layers is set. |
---|
| 419 | * |
---|
| 420 | * Parameters: |
---|
| 421 | * layers - {Array(<OpenLayers.Layer.WMS>)} The new set of layers on which |
---|
| 422 | * the selection should be performed. |
---|
| 423 | */ |
---|
| 424 | setLayers: function(layers) { |
---|
| 425 | if(this.active) { |
---|
| 426 | this.deactivate(); |
---|
| 427 | this.layers = layers; |
---|
| 428 | this.activate(); |
---|
| 429 | } else { |
---|
| 430 | this.layers = layers; |
---|
| 431 | } |
---|
| 432 | }, |
---|
| 433 | |
---|
| 434 | /** |
---|
| 435 | * Function: createFilter |
---|
| 436 | * Create the filter to be used in the SLD. |
---|
| 437 | * |
---|
| 438 | * Parameters: |
---|
| 439 | * geometryAttribute - {Object} Used to get the name of the geometry |
---|
| 440 | * attribute which is needed for constructing the spatial filter. |
---|
| 441 | * geometry - {<OpenLayers.Geometry>} The geometry to use. |
---|
| 442 | * |
---|
| 443 | * Returns: |
---|
| 444 | * {<OpenLayers.Filter.Spatial>} The spatial filter created. |
---|
| 445 | */ |
---|
| 446 | createFilter: function(geometryAttribute, geometry) { |
---|
| 447 | var filter = null; |
---|
| 448 | if (this.handler instanceof OpenLayers.Handler.RegularPolygon) { |
---|
| 449 | // box |
---|
| 450 | if (this.handler.irregular === true) { |
---|
| 451 | filter = new OpenLayers.Filter.Spatial({ |
---|
| 452 | type: OpenLayers.Filter.Spatial.BBOX, |
---|
| 453 | property: geometryAttribute.name, |
---|
| 454 | value: geometry.getBounds()} |
---|
| 455 | ); |
---|
| 456 | } else { |
---|
| 457 | filter = new OpenLayers.Filter.Spatial({ |
---|
| 458 | type: OpenLayers.Filter.Spatial.INTERSECTS, |
---|
| 459 | property: geometryAttribute.name, |
---|
| 460 | value: geometry} |
---|
| 461 | ); |
---|
| 462 | } |
---|
| 463 | } else if (this.handler instanceof OpenLayers.Handler.Polygon) { |
---|
| 464 | filter = new OpenLayers.Filter.Spatial({ |
---|
| 465 | type: OpenLayers.Filter.Spatial.INTERSECTS, |
---|
| 466 | property: geometryAttribute.name, |
---|
| 467 | value: geometry} |
---|
| 468 | ); |
---|
| 469 | } else if (this.handler instanceof OpenLayers.Handler.Path) { |
---|
| 470 | // if source layer is point based, use DWITHIN instead |
---|
| 471 | if (geometryAttribute.type.indexOf('Point') >= 0) { |
---|
| 472 | filter = new OpenLayers.Filter.Spatial({ |
---|
| 473 | type: OpenLayers.Filter.Spatial.DWITHIN, |
---|
| 474 | property: geometryAttribute.name, |
---|
| 475 | distance: this.map.getExtent().getWidth()*0.01 , |
---|
| 476 | distanceUnits: this.map.getUnits(), |
---|
| 477 | value: geometry} |
---|
| 478 | ); |
---|
| 479 | } else { |
---|
| 480 | filter = new OpenLayers.Filter.Spatial({ |
---|
| 481 | type: OpenLayers.Filter.Spatial.INTERSECTS, |
---|
| 482 | property: geometryAttribute.name, |
---|
| 483 | value: geometry} |
---|
| 484 | ); |
---|
| 485 | } |
---|
| 486 | } else if (this.handler instanceof OpenLayers.Handler.Click) { |
---|
| 487 | if (geometryAttribute.type.indexOf('Polygon') >= 0) { |
---|
| 488 | filter = new OpenLayers.Filter.Spatial({ |
---|
| 489 | type: OpenLayers.Filter.Spatial.INTERSECTS, |
---|
| 490 | property: geometryAttribute.name, |
---|
| 491 | value: geometry} |
---|
| 492 | ); |
---|
| 493 | } else { |
---|
| 494 | filter = new OpenLayers.Filter.Spatial({ |
---|
| 495 | type: OpenLayers.Filter.Spatial.DWITHIN, |
---|
| 496 | property: geometryAttribute.name, |
---|
| 497 | distance: this.map.getExtent().getWidth()*0.01 , |
---|
| 498 | distanceUnits: this.map.getUnits(), |
---|
| 499 | value: geometry} |
---|
| 500 | ); |
---|
| 501 | } |
---|
| 502 | } |
---|
| 503 | return filter; |
---|
| 504 | }, |
---|
| 505 | |
---|
| 506 | /** |
---|
| 507 | * Method: select |
---|
| 508 | * When the handler is done, use SLD_BODY on the selection layer to |
---|
| 509 | * display the selection in the map. |
---|
| 510 | * |
---|
| 511 | * Parameters: |
---|
| 512 | * geometry - {Object} or {<OpenLayers.Geometry>} |
---|
| 513 | */ |
---|
| 514 | select: function(geometry) { |
---|
| 515 | this._queue = function() { |
---|
| 516 | for (var i=0, len=this.layers.length; i<len; i++) { |
---|
| 517 | var layer = this.layers[i]; |
---|
| 518 | var geometryAttributes = this.getGeometryAttributes(layer); |
---|
| 519 | var filters = []; |
---|
| 520 | for (var j=0, lenj=geometryAttributes.length; j<lenj; j++) { |
---|
| 521 | var geometryAttribute = geometryAttributes[j]; |
---|
| 522 | if (geometryAttribute !== null) { |
---|
| 523 | // from the click handler we will not get an actual |
---|
| 524 | // geometry so transform |
---|
| 525 | if (!(geometry instanceof OpenLayers.Geometry)) { |
---|
| 526 | var point = this.map.getLonLatFromPixel( |
---|
| 527 | geometry.xy); |
---|
| 528 | geometry = new OpenLayers.Geometry.Point( |
---|
| 529 | point.lon, point.lat); |
---|
| 530 | } |
---|
| 531 | var filter = this.createFilter(geometryAttribute, |
---|
| 532 | geometry); |
---|
| 533 | if (filter !== null) { |
---|
| 534 | filters.push(filter); |
---|
| 535 | } |
---|
| 536 | } |
---|
| 537 | } |
---|
| 538 | |
---|
| 539 | var selectionLayer = this.createSelectionLayer(layer); |
---|
| 540 | var sld = this.createSLD(layer, filters, geometryAttributes); |
---|
| 541 | |
---|
| 542 | this.events.triggerEvent("selected", { |
---|
| 543 | layer: layer, |
---|
| 544 | filters: filters |
---|
| 545 | }); |
---|
| 546 | |
---|
| 547 | selectionLayer.mergeNewParams({SLD_BODY: sld}); |
---|
| 548 | delete this._queue; |
---|
| 549 | } |
---|
| 550 | }; |
---|
| 551 | this.applySelection(); |
---|
| 552 | }, |
---|
| 553 | |
---|
| 554 | /** |
---|
| 555 | * Method: applySelection |
---|
| 556 | * Checks if all required wfs data is cached, and applies the selection |
---|
| 557 | */ |
---|
| 558 | applySelection: function() { |
---|
| 559 | var canApply = true; |
---|
| 560 | for (var i=0, len=this.layers.length; i<len; i++) { |
---|
| 561 | if(!this.wfsCache[this.layers[i].id]) { |
---|
| 562 | canApply = false; |
---|
| 563 | break; |
---|
| 564 | } |
---|
| 565 | } |
---|
| 566 | canApply && this._queue.call(this); |
---|
| 567 | }, |
---|
| 568 | |
---|
| 569 | CLASS_NAME: "OpenLayers.Control.SLDSelect" |
---|
| 570 | }); |
---|