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openlayers

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Build tools and sources for developing OpenLayers based mapping applications

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goog.provide('ol.VectorTile'); goog.require('ol'); goog.require('ol.Tile'); goog.require('ol.dom'); goog.require('ol.featureloader'); /** * @constructor * @extends {ol.Tile} * @param {ol.TileCoord} tileCoord Tile coordinate. * @param {ol.Tile.State} state State. * @param {string} src Data source url. * @param {ol.format.Feature} format Feature format. * @param {ol.TileLoadFunctionType} tileLoadFunction Tile load function. */ ol.VectorTile = function(tileCoord, state, src, format, tileLoadFunction) { ol.Tile.call(this, tileCoord, state); /** * @private * @type {CanvasRenderingContext2D} */ this.context_ = ol.dom.createCanvasContext2D(); /** * @private * @type {ol.format.Feature} */ this.format_ = format; /** * @private * @type {Array.<ol.Feature>} */ this.features_ = null; /** * @private * @type {ol.FeatureLoader} */ this.loader_; /** * Data projection * @private * @type {ol.proj.Projection} */ this.projection_; /** * @private * @type {ol.TileReplayState} */ this.replayState_ = { dirty: false, renderedRenderOrder: null, renderedRevision: -1, renderedTileRevision: -1, replayGroup: null }; /** * @private * @type {ol.TileLoadFunctionType} */ this.tileLoadFunction_ = tileLoadFunction; /** * @private * @type {string} */ this.url_ = src; }; ol.inherits(ol.VectorTile, ol.Tile); /** * @return {CanvasRenderingContext2D} The rendering context. */ ol.VectorTile.prototype.getContext = function() { return this.context_; }; /** * @inheritDoc */ ol.VectorTile.prototype.getImage = function() { return this.replayState_.renderedTileRevision == -1 ? null : this.context_.canvas; }; /** * Get the feature format assigned for reading this tile's features. * @return {ol.format.Feature} Feature format. * @api */ ol.VectorTile.prototype.getFormat = function() { return this.format_; }; /** * @return {Array.<ol.Feature>} Features. */ ol.VectorTile.prototype.getFeatures = function() { return this.features_; }; /** * @return {ol.TileReplayState} The replay state. */ ol.VectorTile.prototype.getReplayState = function() { return this.replayState_; }; /** * @inheritDoc */ ol.VectorTile.prototype.getKey = function() { return this.url_; }; /** * @return {ol.proj.Projection} Feature projection. */ ol.VectorTile.prototype.getProjection = function() { return this.projection_; }; /** * Load the tile. */ ol.VectorTile.prototype.load = function() { if (this.state == ol.Tile.State.IDLE) { this.setState(ol.Tile.State.LOADING); this.tileLoadFunction_(this, this.url_); this.loader_(null, NaN, null); } }; /** * Handler for successful tile load. * @param {Array.<ol.Feature>} features The loaded features. * @param {ol.proj.Projection} dataProjection Data projection. */ ol.VectorTile.prototype.onLoad_ = function(features, dataProjection) { this.setProjection(dataProjection); this.setFeatures(features); }; /** * Handler for tile load errors. */ ol.VectorTile.prototype.onError_ = function() { this.setState(ol.Tile.State.ERROR); }; /** * @param {Array.<ol.Feature>} features Features. * @api */ ol.VectorTile.prototype.setFeatures = function(features) { this.features_ = features; this.setState(ol.Tile.State.LOADED); }; /** * Set the projection of the features that were added with {@link #setFeatures}. * @param {ol.proj.Projection} projection Feature projection. * @api */ ol.VectorTile.prototype.setProjection = function(projection) { this.projection_ = projection; }; /** * @param {ol.Tile.State} tileState Tile state. */ ol.VectorTile.prototype.setState = function(tileState) { this.state = tileState; this.changed(); }; /** * Set the feature loader for reading this tile's features. * @param {ol.FeatureLoader} loader Feature loader. * @api */ ol.VectorTile.prototype.setLoader = function(loader) { this.loader_ = loader; }; /** * Sets the loader for a tile. * @param {ol.VectorTile} tile Vector tile. * @param {string} url URL. */ ol.VectorTile.defaultLoadFunction = function(tile, url) { var loader = ol.featureloader.loadFeaturesXhr( url, tile.getFormat(), tile.onLoad_.bind(tile), tile.onError_.bind(tile)); tile.setLoader(loader); };