501b42228a
git-svn-id: http://svn.openlayers.org/trunk/openlayers@12384 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
393 lines
12 KiB
JavaScript
393 lines
12 KiB
JavaScript
/* Copyright (c) 2006-2011 by OpenLayers Contributors (see authors.txt for
|
|
* full list of contributors). Published under the Clear BSD license.
|
|
* See http://svn.openlayers.org/trunk/openlayers/license.txt for the
|
|
* full text of the license. */
|
|
|
|
|
|
/**
|
|
* @requires OpenLayers/Control.js
|
|
* @requires OpenLayers/Handler/Click.js
|
|
* @requires OpenLayers/Handler/Hover.js
|
|
* @requires OpenLayers/Request.js
|
|
* @requires OpenLayers/Format/WMSGetFeatureInfo.js
|
|
*/
|
|
|
|
/**
|
|
* Class: OpenLayers.Control.WMTSGetFeatureInfo
|
|
* The WMTSGetFeatureInfo control uses a WMTS query to get information about a
|
|
* point on the map. The information may be in a display-friendly format
|
|
* such as HTML, or a machine-friendly format such as GML, depending on the
|
|
* server's capabilities and the client's configuration. This control
|
|
* handles click or hover events, attempts to parse the results using an
|
|
* OpenLayers.Format, and fires a 'getfeatureinfo' event for each layer
|
|
* queried.
|
|
*
|
|
* Inherits from:
|
|
* - <OpenLayers.Control>
|
|
*/
|
|
OpenLayers.Control.WMTSGetFeatureInfo = OpenLayers.Class(OpenLayers.Control, {
|
|
|
|
/**
|
|
* APIProperty: hover
|
|
* {Boolean} Send GetFeatureInfo requests when mouse stops moving.
|
|
* Default is false.
|
|
*/
|
|
hover: false,
|
|
|
|
/**
|
|
* Property: requestEncoding
|
|
* {String} One of "KVP" or "REST". Only KVP encoding is supported at this
|
|
* time.
|
|
*/
|
|
requestEncoding: "KVP",
|
|
|
|
/**
|
|
* APIProperty: drillDown
|
|
* {Boolean} Drill down over all WMTS layers in the map. When
|
|
* using drillDown mode, hover is not possible. A getfeatureinfo event
|
|
* will be fired for each layer queried.
|
|
*/
|
|
drillDown: false,
|
|
|
|
/**
|
|
* APIProperty: maxFeatures
|
|
* {Integer} Maximum number of features to return from a WMTS query. This
|
|
* sets the feature_count parameter on WMTS GetFeatureInfo
|
|
* requests.
|
|
*/
|
|
maxFeatures: 10,
|
|
|
|
/** APIProperty: clickCallback
|
|
* {String} The click callback to register in the
|
|
* {<OpenLayers.Handler.Click>} object created when the hover
|
|
* option is set to false. Default is "click".
|
|
*/
|
|
clickCallback: "click",
|
|
|
|
/**
|
|
* Property: layers
|
|
* {Array(<OpenLayers.Layer.WMTS>)} The layers to query for feature info.
|
|
* If omitted, all map WMTS layers will be considered.
|
|
*/
|
|
layers: null,
|
|
|
|
/**
|
|
* APIProperty: queryVisible
|
|
* {Boolean} Filter out hidden layers when searching the map for layers to
|
|
* query. Default is true.
|
|
*/
|
|
queryVisible: true,
|
|
|
|
/**
|
|
* Property: infoFormat
|
|
* {String} The mimetype to request from the server
|
|
*/
|
|
infoFormat: 'text/html',
|
|
|
|
/**
|
|
* Property: vendorParams
|
|
* {Object} Additional parameters that will be added to the request, for
|
|
* WMTS implementations that support them. This could e.g. look like
|
|
* (start code)
|
|
* {
|
|
* radius: 5
|
|
* }
|
|
* (end)
|
|
*/
|
|
vendorParams: {},
|
|
|
|
/**
|
|
* Property: format
|
|
* {<OpenLayers.Format>} A format for parsing GetFeatureInfo responses.
|
|
* Default is <OpenLayers.Format.WMSGetFeatureInfo>.
|
|
*/
|
|
format: null,
|
|
|
|
/**
|
|
* Property: formatOptions
|
|
* {Object} Optional properties to set on the format (if one is not provided
|
|
* in the <format> property.
|
|
*/
|
|
formatOptions: null,
|
|
|
|
/**
|
|
* APIProperty: handlerOptions
|
|
* {Object} Additional options for the handlers used by this control, e.g.
|
|
* (start code)
|
|
* {
|
|
* "click": {delay: 100},
|
|
* "hover": {delay: 300}
|
|
* }
|
|
* (end)
|
|
*/
|
|
handlerOptions: null,
|
|
|
|
/**
|
|
* Property: handler
|
|
* {Object} Reference to the <OpenLayers.Handler> for this control
|
|
*/
|
|
handler: null,
|
|
|
|
/**
|
|
* Property: hoverRequest
|
|
* {<OpenLayers.Request>} contains the currently running hover request
|
|
* (if any).
|
|
*/
|
|
hoverRequest: null,
|
|
|
|
/**
|
|
* Supported event types (in addition to those from <OpenLayers.Control>):
|
|
* beforegetfeatureinfo - Triggered before each request is sent.
|
|
* The event object has an *xy* property with the position of the
|
|
* mouse click or hover event that triggers the request and a *layer*
|
|
* property referencing the layer about to be queried. If a listener
|
|
* returns false, the request will not be issued.
|
|
* getfeatureinfo - Triggered when a GetFeatureInfo response is received.
|
|
* The event object has a *text* property with the body of the
|
|
* response (String), a *features* property with an array of the
|
|
* parsed features, an *xy* property with the position of the mouse
|
|
* click or hover event that triggered the request, a *layer* property
|
|
* referencing the layer queried and a *request* property with the
|
|
* request itself. If drillDown is set to true, one event will be fired
|
|
* for each layer queried.
|
|
* exception - Triggered when a GetFeatureInfo request fails (with a
|
|
* status other than 200) or whenparsing fails. Listeners will receive
|
|
* an event with *request*, *xy*, and *layer* properties. In the case
|
|
* of a parsing error, the event will also contain an *error* property.
|
|
*/
|
|
|
|
/**
|
|
* Property: pending
|
|
* {Number} The number of pending requests.
|
|
*/
|
|
pending: 0,
|
|
|
|
/**
|
|
* Constructor: <OpenLayers.Control.WMTSGetFeatureInfo>
|
|
*
|
|
* Parameters:
|
|
* options - {Object}
|
|
*/
|
|
initialize: function(options) {
|
|
options = options || {};
|
|
options.handlerOptions = options.handlerOptions || {};
|
|
|
|
OpenLayers.Control.prototype.initialize.apply(this, [options]);
|
|
|
|
if (!this.format) {
|
|
this.format = new OpenLayers.Format.WMSGetFeatureInfo(
|
|
options.formatOptions
|
|
);
|
|
}
|
|
|
|
if (this.drillDown === true) {
|
|
this.hover = false;
|
|
}
|
|
|
|
if (this.hover) {
|
|
this.handler = new OpenLayers.Handler.Hover(
|
|
this, {
|
|
move: this.cancelHover,
|
|
pause: this.getInfoForHover
|
|
},
|
|
OpenLayers.Util.extend(
|
|
this.handlerOptions.hover || {}, {delay: 250}
|
|
)
|
|
);
|
|
} else {
|
|
var callbacks = {};
|
|
callbacks[this.clickCallback] = this.getInfoForClick;
|
|
this.handler = new OpenLayers.Handler.Click(
|
|
this, callbacks, this.handlerOptions.click || {}
|
|
);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Method: getInfoForClick
|
|
* Called on click
|
|
*
|
|
* Parameters:
|
|
* evt - {<OpenLayers.Event>}
|
|
*/
|
|
getInfoForClick: function(evt) {
|
|
this.request(evt.xy, {});
|
|
},
|
|
|
|
/**
|
|
* Method: getInfoForHover
|
|
* Pause callback for the hover handler
|
|
*
|
|
* Parameters:
|
|
* evt - {Object}
|
|
*/
|
|
getInfoForHover: function(evt) {
|
|
this.request(evt.xy, {hover: true});
|
|
},
|
|
|
|
/**
|
|
* Method: cancelHover
|
|
* Cancel callback for the hover handler
|
|
*/
|
|
cancelHover: function() {
|
|
if (this.hoverRequest) {
|
|
--this.pending;
|
|
if (this.pending <= 0) {
|
|
OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
|
|
this.pending = 0;
|
|
}
|
|
this.hoverRequest.abort();
|
|
this.hoverRequest = null;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Method: findLayers
|
|
* Internal method to get the layers, independent of whether we are
|
|
* inspecting the map or using a client-provided array
|
|
*/
|
|
findLayers: function() {
|
|
var candidates = this.layers || this.map.layers;
|
|
var layers = [];
|
|
var layer;
|
|
for (var i=candidates.length-1; i>=0; --i) {
|
|
layer = candidates[i];
|
|
if (layer instanceof OpenLayers.Layer.WMTS &&
|
|
layer.requestEncoding === this.requestEncoding &&
|
|
(!this.queryVisible || layer.getVisibility())) {
|
|
layers.push(layer);
|
|
if (!this.drillDown || this.hover) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return layers;
|
|
},
|
|
|
|
/**
|
|
* Method: buildRequestOptions
|
|
* Build an object with the relevant options for the GetFeatureInfo request.
|
|
*
|
|
* Parameters:
|
|
* layer - {<OpenLayers.Layer.WMTS>} A WMTS layer.
|
|
* xy - {<OpenLayers.Pixel>} The position on the map where the
|
|
* mouse event occurred.
|
|
*/
|
|
buildRequestOptions: function(layer, xy) {
|
|
var loc = this.map.getLonLatFromPixel(xy);
|
|
var getTileUrl = layer.getURL(
|
|
new OpenLayers.Bounds(loc.lon, loc.lat, loc.lon, loc.lat)
|
|
);
|
|
var params = OpenLayers.Util.getParameters(getTileUrl);
|
|
var tileInfo = layer.getTileInfo(loc);
|
|
OpenLayers.Util.extend(params, {
|
|
service: "WMTS",
|
|
version: layer.version,
|
|
request: "GetFeatureInfo",
|
|
infoFormat: this.infoFormat,
|
|
i: tileInfo.i,
|
|
j: tileInfo.j
|
|
});
|
|
OpenLayers.Util.applyDefaults(params, this.vendorParams);
|
|
return {
|
|
url: OpenLayers.Util.isArray(layer.url) ? layer.url[0] : layer.url,
|
|
params: OpenLayers.Util.upperCaseObject(params),
|
|
callback: function(request) {
|
|
this.handleResponse(xy, request, layer);
|
|
},
|
|
scope: this
|
|
};
|
|
},
|
|
|
|
/**
|
|
* Method: request
|
|
* Sends a GetFeatureInfo request to the WMTS
|
|
*
|
|
* Parameters:
|
|
* xy - {<OpenLayers.Pixel>} The position on the map where the mouse event
|
|
* occurred.
|
|
* options - {Object} additional options for this method.
|
|
*
|
|
* Valid options:
|
|
* - *hover* {Boolean} true if we do the request for the hover handler
|
|
*/
|
|
request: function(xy, options) {
|
|
options = options || {};
|
|
var layers = this.findLayers();
|
|
if (layers.length > 0) {
|
|
var issue, layer;
|
|
for (var i=0, len=layers.length; i<len; i++) {
|
|
layer = layers[i];
|
|
issue = this.events.triggerEvent("beforegetfeatureinfo", {
|
|
xy: xy,
|
|
layer: layer
|
|
});
|
|
if (issue !== false) {
|
|
++this.pending;
|
|
var requestOptions = this.buildRequestOptions(layer, xy);
|
|
var request = OpenLayers.Request.GET(requestOptions);
|
|
if (options.hover === true) {
|
|
this.hoverRequest = request;
|
|
}
|
|
}
|
|
}
|
|
if (this.pending > 0) {
|
|
OpenLayers.Element.addClass(this.map.viewPortDiv, "olCursorWait");
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Method: handleResponse
|
|
* Handler for the GetFeatureInfo response.
|
|
*
|
|
* Parameters:
|
|
* xy - {<OpenLayers.Pixel>} The position on the map where the mouse event
|
|
* occurred.
|
|
* request - {XMLHttpRequest} The request object.
|
|
* layer - {<OpenLayers.Layer.WMTS>} The queried layer.
|
|
*/
|
|
handleResponse: function(xy, request, layer) {
|
|
--this.pending;
|
|
if (this.pending <= 0) {
|
|
OpenLayers.Element.removeClass(this.map.viewPortDiv, "olCursorWait");
|
|
this.pending = 0;
|
|
}
|
|
if (request.status && (request.status < 200 || request.status >= 300)) {
|
|
this.events.triggerEvent("exception", {
|
|
xy: xy,
|
|
request: request,
|
|
layer: layer
|
|
});
|
|
} else {
|
|
var doc = request.responseXML;
|
|
if (!doc || !doc.documentElement) {
|
|
doc = request.responseText;
|
|
}
|
|
var features, except;
|
|
try {
|
|
features = this.format.read(doc);
|
|
} catch (error) {
|
|
except = true;
|
|
this.events.triggerEvent("exception", {
|
|
xy: xy,
|
|
request: request,
|
|
error: error,
|
|
layer: layer
|
|
});
|
|
}
|
|
if (!except) {
|
|
this.events.triggerEvent("getfeatureinfo", {
|
|
text: request.responseText,
|
|
features: features,
|
|
request: request,
|
|
xy: xy,
|
|
layer: layer
|
|
});
|
|
}
|
|
}
|
|
},
|
|
|
|
CLASS_NAME: "OpenLayers.Control.WMTSGetFeatureInfo"
|
|
});
|