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Diffstat (limited to 'misc/openlayers/lib/OpenLayers/Layer/Image.js')
| -rw-r--r-- | misc/openlayers/lib/OpenLayers/Layer/Image.js | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/misc/openlayers/lib/OpenLayers/Layer/Image.js b/misc/openlayers/lib/OpenLayers/Layer/Image.js deleted file mode 100644 index b96e369..0000000 --- a/misc/openlayers/lib/OpenLayers/Layer/Image.js +++ /dev/null @@ -1,259 +0,0 @@ -/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for - * full list of contributors). Published under the 2-clause BSD license. - * See license.txt in the OpenLayers distribution or repository for the - * full text of the license. */ - -/** - * @requires OpenLayers/Layer.js - * @requires OpenLayers/Tile/Image.js - */ - -/** - * Class: OpenLayers.Layer.Image - * Instances of OpenLayers.Layer.Image are used to display data from a web - * accessible image as a map layer. Create a new image layer with the - * <OpenLayers.Layer.Image> constructor. - * - * Inherits from: - * - <OpenLayers.Layer> - */ -OpenLayers.Layer.Image = OpenLayers.Class(OpenLayers.Layer, { - - /** - * Property: isBaseLayer - * {Boolean} The layer is a base layer. Default is true. Set this property - * in the layer options - */ - isBaseLayer: true, - - /** - * Property: url - * {String} URL of the image to use - */ - url: null, - - /** - * Property: extent - * {<OpenLayers.Bounds>} The image bounds in map units. This extent will - * also be used as the default maxExtent for the layer. If you wish - * to have a maxExtent that is different than the image extent, set the - * maxExtent property of the options argument (as with any other layer). - */ - extent: null, - - /** - * Property: size - * {<OpenLayers.Size>} The image size in pixels - */ - size: null, - - /** - * Property: tile - * {<OpenLayers.Tile.Image>} - */ - tile: null, - - /** - * Property: aspectRatio - * {Float} The ratio of height/width represented by a single pixel in the - * graphic - */ - aspectRatio: null, - - /** - * Constructor: OpenLayers.Layer.Image - * Create a new image layer - * - * Parameters: - * name - {String} A name for the layer. - * url - {String} Relative or absolute path to the image - * extent - {<OpenLayers.Bounds>} The extent represented by the image - * size - {<OpenLayers.Size>} The size (in pixels) of the image - * options - {Object} Hashtable of extra options to tag onto the layer - */ - initialize: function(name, url, extent, size, options) { - this.url = url; - this.extent = extent; - this.maxExtent = extent; - this.size = size; - OpenLayers.Layer.prototype.initialize.apply(this, [name, options]); - - this.aspectRatio = (this.extent.getHeight() / this.size.h) / - (this.extent.getWidth() / this.size.w); - }, - - /** - * Method: destroy - * Destroy this layer - */ - destroy: function() { - if (this.tile) { - this.removeTileMonitoringHooks(this.tile); - this.tile.destroy(); - this.tile = null; - } - OpenLayers.Layer.prototype.destroy.apply(this, arguments); - }, - - /** - * Method: clone - * Create a clone of this layer - * - * Paramters: - * obj - {Object} An optional layer (is this ever used?) - * - * Returns: - * {<OpenLayers.Layer.Image>} An exact copy of this layer - */ - clone: function(obj) { - - if(obj == null) { - obj = new OpenLayers.Layer.Image(this.name, - this.url, - this.extent, - this.size, - this.getOptions()); - } - - //get all additions from superclasses - obj = OpenLayers.Layer.prototype.clone.apply(this, [obj]); - - // copy/set any non-init, non-simple values here - - return obj; - }, - - /** - * APIMethod: setMap - * - * Parameters: - * map - {<OpenLayers.Map>} - */ - setMap: function(map) { - /** - * If nothing to do with resolutions has been set, assume a single - * resolution determined by ratio*extent/size - if an image has a - * pixel aspect ratio different than one (as calculated above), the - * image will be stretched in one dimension only. - */ - if( this.options.maxResolution == null ) { - this.options.maxResolution = this.aspectRatio * - this.extent.getWidth() / - this.size.w; - } - OpenLayers.Layer.prototype.setMap.apply(this, arguments); - }, - - /** - * Method: moveTo - * Create the tile for the image or resize it for the new resolution - * - * Parameters: - * bounds - {<OpenLayers.Bounds>} - * zoomChanged - {Boolean} - * dragging - {Boolean} - */ - moveTo:function(bounds, zoomChanged, dragging) { - OpenLayers.Layer.prototype.moveTo.apply(this, arguments); - - var firstRendering = (this.tile == null); - - if(zoomChanged || firstRendering) { - - //determine new tile size - this.setTileSize(); - - //determine new position (upper left corner of new bounds) - var ulPx = this.map.getLayerPxFromLonLat({ - lon: this.extent.left, - lat: this.extent.top - }); - - if(firstRendering) { - //create the new tile - this.tile = new OpenLayers.Tile.Image(this, ulPx, this.extent, - null, this.tileSize); - this.addTileMonitoringHooks(this.tile); - } else { - //just resize the tile and set it's new position - this.tile.size = this.tileSize.clone(); - this.tile.position = ulPx.clone(); - } - this.tile.draw(); - } - }, - - /** - * Set the tile size based on the map size. - */ - setTileSize: function() { - var tileWidth = this.extent.getWidth() / this.map.getResolution(); - var tileHeight = this.extent.getHeight() / this.map.getResolution(); - this.tileSize = new OpenLayers.Size(tileWidth, tileHeight); - }, - - /** - * Method: addTileMonitoringHooks - * This function takes a tile as input and adds the appropriate hooks to - * the tile so that the layer can keep track of the loading tiles. - * - * Parameters: - * tile - {<OpenLayers.Tile>} - */ - addTileMonitoringHooks: function(tile) { - tile.onLoadStart = function() { - this.events.triggerEvent("loadstart"); - }; - tile.events.register("loadstart", this, tile.onLoadStart); - - tile.onLoadEnd = function() { - this.events.triggerEvent("loadend"); - }; - tile.events.register("loadend", this, tile.onLoadEnd); - tile.events.register("unload", this, tile.onLoadEnd); - }, - - /** - * Method: removeTileMonitoringHooks - * This function takes a tile as input and removes the tile hooks - * that were added in <addTileMonitoringHooks>. - * - * Parameters: - * tile - {<OpenLayers.Tile>} - */ - removeTileMonitoringHooks: function(tile) { - tile.unload(); - tile.events.un({ - "loadstart": tile.onLoadStart, - "loadend": tile.onLoadEnd, - "unload": tile.onLoadEnd, - scope: this - }); - }, - - /** - * APIMethod: setUrl - * - * Parameters: - * newUrl - {String} - */ - setUrl: function(newUrl) { - this.url = newUrl; - this.tile.draw(); - }, - - /** - * APIMethod: getURL - * The url we return is always the same (the image itself never changes) - * so we can ignore the bounds parameter (it will always be the same, - * anyways) - * - * Parameters: - * bounds - {<OpenLayers.Bounds>} - */ - getURL: function(bounds) { - return this.url; - }, - - CLASS_NAME: "OpenLayers.Layer.Image" -}); |