1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 | 1× 1× 1× 1× 1× 1× 1× 2× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× | import LayerBaseVector from "../layers/LayerBaseVector"; import MapInteractionBase from './mapInteractionBase'; import * as checkDefined from '../util/checkDefined'; import provide from '../util/provide'; import makeGuid from '../util/makeGuid'; import ol = require('custom-ol'); import $ = require('jquery'); const nm = provide('olHelpers'); export interface extentObject{ minX: number; minY: number; maxX: number; maxY: number; } export interface mapMoveCallbackFunction{ /** * * @param extent extent as predefined object minX, minX, maxX, maxY * @param zoomLevel current zoom level * @param evtType the event type 'change:center', 'change:resolution' */ (extent: extentObject, zoomLevel: number, evtType?: string): any } /** * assists with map move interactions, trigger callback functions * @augments MapInteractionBase */ export class MapMoveCls extends MapInteractionBase { _mapExtent: extentObject; _zoomLevel: number; _lookupLayer: Object; _arrLayer: Array<LayerBaseVector>; _arrLyrTimeout: Array<number>; _mapMoveCallbackTimeout: Array<number>; _mapMoveCallbackDelays: Array<number>; _mapMoveCallbacksLookup: Object; _mapMoveCallbackContext: Array<Object>; _mapMoveCallbacks: Array<mapMoveCallbackFunction>; _arrLyrRequest: Array<any>; /** * constructor called implicitly */ constructor() { super('map move'); this._arrLyrRequest = []; this._arrLyrTimeout = []; this._arrLayer = []; this._lookupLayer = {}; this._mapMoveCallbacks = []; this._mapMoveCallbacksLookup = {}; this._mapMoveCallbackDelays = []; this._mapMoveCallbackContext = []; this._mapMoveCallbackTimeout = []; this._mapExtent = undefined; this._zoomLevel = undefined; } /** * initialize the map move object * @param theMap - the ol map */ init(theMap: ol.Map){ super.init(theMap); this.map.getView().on(['change:center', 'change:resolution'], (e) =>{ this._updateMapExtent(); // trigger the layer updates for (let i = 0; i < this._arrLayer.length; i++) { this.triggerLyrLoad(this._arrLayer[i], i, e.type); } // trigger the map callbacks for (let i = 0; i < this._mapMoveCallbacks.length; i++) { this.triggerMoveCallback(i, e.type); } }); } _updateMapExtent() { let theView = this.map.getView(); this._zoomLevel = theView.getZoom(); let extentArray = theView.calculateExtent(this.map.getSize()); this._mapExtent = { minX: extentArray[0], minY: extentArray[1], maxX: extentArray[2], maxY: extentArray[3] }; } /** * return the map extent */ get mapExtent() { if (!this._mapExtent) { this._updateMapExtent(); } return this._mapExtent; } /** * Trigger the layer load * @param lyr the layer being acted on * @param index index of the layer * @param eventType the event triggering the load, as 'change:center' or 'change:resolution' */ triggerLyrLoad(lyr: LayerBaseVector, index?: number, eventType?: string) { if (checkDefined.undefinedOrNull(lyr) && checkDefined.undefinedOrNull(index)) { throw 'need to define lyr or index'; } else if (checkDefined.definedAndNotNull(lyr) && checkDefined.undefinedOrNull(index)) { index = this._arrLayer.indexOf(lyr); } else if (checkDefined.undefinedOrNull(lyr) && checkDefined.definedAndNotNull(index)) { lyr = this._arrLayer[index]; } // clear the timeout if (this._arrLyrTimeout[index] != null) { clearTimeout(this._arrLyrTimeout[index]); this._arrLyrTimeout[index] = null; } // abort if necessary and clear the request if (this._arrLyrRequest[index] != null && this._arrLyrRequest[index] != 4) { this._arrLyrRequest[index].abort(); this._arrLyrRequest[index] = null; } // dummy callback used if before load returns false let callbackFunc = function () {}; if (lyr.mapMoveBefore(this._zoomLevel, eventType)) { lyr.mapMoveMakeGetParams(this._mapExtent, this._zoomLevel); let __this = this; callbackFunc = function () { function innerFunction(theLayer, theIndex) { let _innerThis = this; this._arrLyrRequest[theIndex] = $.get( theLayer.url, theLayer.mapMoveParams, function (d) { /** * @type {LayerBaseVector} */ theLayer.mapMoveCallback(d); theLayer.loadCallback(); }, 'json').fail( function (jqXHR) { if (jqXHR.statusText != 'abort') { console.log('failed'); console.log(theLayer.url); console.log(theLayer.mapMoveParams); } }).always( function () { _innerThis._arrLyrTimeout[theIndex] = null; _innerThis._arrLyrRequest[theIndex] = null; }); } innerFunction.call(__this, lyr, index); }; } else { lyr.clear(); } this._arrLyrTimeout[index] = setTimeout(callbackFunc, lyr.onDemandDelay); } /** * trigger the map move call back at the given index * @param ind - the index of the layer * @param eventType=undefined the event triggering the load as 'change:center' or 'change:resolution' * @param functionId=undefined the function id used to reference the added callback function */ triggerMoveCallback(ind: number, eventType?: string, functionId?: string) { if (typeof ind == 'undefined' && typeof functionId == 'undefined'){ throw 'either the function index or the id must be defined'; } if (typeof ind !== 'number'){ ind = this._mapMoveCallbacks.indexOf(this._mapMoveCallbacksLookup[functionId]); } if (ind < 0){ console.log('function not found'); return; } // clear the timeout if (this._mapMoveCallbackTimeout[ind] != null) { clearTimeout(this._mapMoveCallbackTimeout[ind]); this._mapMoveCallbackTimeout[ind] = null; } let ctx = this._mapMoveCallbackContext[ind]; let theFunc = this._mapMoveCallbacks[ind]; let __this = this; let f = function () { if (ctx !== null) { theFunc.call(ctx, __this._mapExtent, __this._zoomLevel, eventType); } else { theFunc(__this._mapExtent, __this._zoomLevel, eventType); } }; this._mapMoveCallbackTimeout[ind] = setTimeout(f, this._mapMoveCallbackDelays[ind]); } /** * Add a layer to the interaction * @param lyr - layer to add * @param triggerOnAdd - if the layer should be loaded on add */ addVectorLayer(lyr: LayerBaseVector, triggerOnAdd: boolean = true) { if (this._arrLayer.indexOf(lyr) > -1) { console.log('already added ' + lyr.name + ' to map move'); return; } this._checkInit(); this._arrLyrRequest.push(null); this._arrLyrTimeout.push(null); this._arrLayer.push(lyr); this._lookupLayer[lyr.id] = lyr; triggerOnAdd = typeof triggerOnAdd == 'boolean' ? triggerOnAdd : true; if (triggerOnAdd) { if (this._mapExtent === undefined) { this._updateMapExtent(); } this.triggerLyrLoad(lyr, this._arrLayer.length - 1); } } /** * add a callback to the map move event * @param func - callback function * @param context - the context to use for this function * @param delay=50 the delay before call load * @param triggerOnAdd if the layer should be loaded on add to mapMove * @param functionId optional id to reference the function later for outside triggering */ addCallback(func: mapMoveCallbackFunction, context?: any, delay?: number, triggerOnAdd? : boolean, functionId?: string) { if (this._mapMoveCallbacks.indexOf(func) > -1) { console.log('this function already added to map move'); return; } this._checkInit(); if (!functionId){ functionId = makeGuid(); } this._mapMoveCallbacks.push(func); this._mapMoveCallbacksLookup[functionId] = functionId; this._mapMoveCallbackDelays.push(typeof delay == 'number' ? delay : 50); this._mapMoveCallbackContext.push(checkDefined.definedAndNotNull(context) ? context : null); this._mapMoveCallbackTimeout.push(null); triggerOnAdd = typeof triggerOnAdd == 'boolean' ? triggerOnAdd : true; if (triggerOnAdd) { if (this._mapExtent === undefined) { this._updateMapExtent(); } this.triggerMoveCallback(this._mapMoveCallbacks.length - 1); } } } nm.MapMoveCls = MapMoveCls; export default MapMoveCls; |