diff options
author | Chris Schlaeger <chris@linux.com> | 2014-08-12 21:56:44 +0200 |
---|---|---|
committer | Chris Schlaeger <chris@linux.com> | 2014-08-12 21:56:44 +0200 |
commit | ea346a785dc1b3f7c156f6fc33da634e1f1a627b (patch) | |
tree | af67530553d20b6e82ad60fd79593e9c4abf5565 /misc/openlayers/lib/OpenLayers/Strategy/Fixed.js | |
parent | 59741cd535c47f25971bf8c32b25da25ceadc6d5 (diff) | |
download | postrunner-fb1989bda5d3e0a5472ba7644d57cae197733a8f.zip |
Adding jquery, flot and openlayers to be included with the GEM.v0.0.4
Diffstat (limited to 'misc/openlayers/lib/OpenLayers/Strategy/Fixed.js')
-rw-r--r-- | misc/openlayers/lib/OpenLayers/Strategy/Fixed.js | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/misc/openlayers/lib/OpenLayers/Strategy/Fixed.js b/misc/openlayers/lib/OpenLayers/Strategy/Fixed.js new file mode 100644 index 0000000..b06f2cd --- /dev/null +++ b/misc/openlayers/lib/OpenLayers/Strategy/Fixed.js @@ -0,0 +1,135 @@ +/* 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/Strategy.js + */ + +/** + * Class: OpenLayers.Strategy.Fixed + * A simple strategy that requests features once and never requests new data. + * + * Inherits from: + * - <OpenLayers.Strategy> + */ +OpenLayers.Strategy.Fixed = OpenLayers.Class(OpenLayers.Strategy, { + + /** + * APIProperty: preload + * {Boolean} Load data before layer made visible. Enabling this may result + * in considerable overhead if your application loads many data layers + * that are not visible by default. Default is false. + */ + preload: false, + + /** + * Constructor: OpenLayers.Strategy.Fixed + * Create a new Fixed strategy. + * + * Parameters: + * options - {Object} Optional object whose properties will be set on the + * instance. + */ + + /** + * Method: activate + * Activate the strategy: load data or add listener to load when visible + * + * Returns: + * {Boolean} True if the strategy was successfully activated or false if + * the strategy was already active. + */ + activate: function() { + var activated = OpenLayers.Strategy.prototype.activate.apply(this, arguments); + if(activated) { + this.layer.events.on({ + "refresh": this.load, + scope: this + }); + if(this.layer.visibility == true || this.preload) { + this.load(); + } else { + this.layer.events.on({ + "visibilitychanged": this.load, + scope: this + }); + } + } + return activated; + }, + + /** + * Method: deactivate + * Deactivate the strategy. Undo what is done in <activate>. + * + * Returns: + * {Boolean} The strategy was successfully deactivated. + */ + deactivate: function() { + var deactivated = OpenLayers.Strategy.prototype.deactivate.call(this); + if(deactivated) { + this.layer.events.un({ + "refresh": this.load, + "visibilitychanged": this.load, + scope: this + }); + } + return deactivated; + }, + + /** + * Method: load + * Tells protocol to load data and unhooks the visibilitychanged event + * + * Parameters: + * options - {Object} options to pass to protocol read. + */ + load: function(options) { + var layer = this.layer; + layer.events.triggerEvent("loadstart", {filter: layer.filter}); + layer.protocol.read(OpenLayers.Util.applyDefaults({ + callback: this.merge, + filter: layer.filter, + scope: this + }, options)); + layer.events.un({ + "visibilitychanged": this.load, + scope: this + }); + }, + + /** + * Method: merge + * Add all features to the layer. + * If the layer projection differs from the map projection, features + * will be transformed from the layer projection to the map projection. + * + * Parameters: + * resp - {<OpenLayers.Protocol.Response>} The response object passed + * by the protocol. + */ + merge: function(resp) { + var layer = this.layer; + layer.destroyFeatures(); + var features = resp.features; + if (features && features.length > 0) { + var remote = layer.projection; + var local = layer.map.getProjectionObject(); + if(!local.equals(remote)) { + var geom; + for(var i=0, len=features.length; i<len; ++i) { + geom = features[i].geometry; + if(geom) { + geom.transform(remote, local); + } + } + } + layer.addFeatures(features); + } + layer.events.triggerEvent("loadend", {response: resp}); + }, + + CLASS_NAME: "OpenLayers.Strategy.Fixed" +}); |