100 lines
2.7 KiB
JavaScript
100 lines
2.7 KiB
JavaScript
goog.provide('ol.source.SingleImageWMS');
|
|
|
|
goog.require('goog.asserts');
|
|
goog.require('ol.Image');
|
|
goog.require('ol.ImageUrlFunction');
|
|
goog.require('ol.extent');
|
|
goog.require('ol.source.FeatureInfoSource');
|
|
goog.require('ol.source.ImageSource');
|
|
goog.require('ol.source.wms');
|
|
|
|
|
|
|
|
/**
|
|
* @constructor
|
|
* @extends {ol.source.ImageSource}
|
|
* @implements {ol.source.FeatureInfoSource}
|
|
* @param {ol.source.SingleImageWMSOptions} options Options.
|
|
*/
|
|
ol.source.SingleImageWMS = function(options) {
|
|
var imageUrlFunction = goog.isDef(options.url) ?
|
|
ol.ImageUrlFunction.createFromParamsFunction(
|
|
options.url, options.params, ol.source.wms.getUrl) :
|
|
ol.ImageUrlFunction.nullImageUrlFunction;
|
|
|
|
goog.base(this, {
|
|
attributions: options.attributions,
|
|
crossOrigin: options.crossOrigin,
|
|
extent: options.extent,
|
|
projection: options.projection,
|
|
resolutions: options.resolutions,
|
|
imageUrlFunction: imageUrlFunction
|
|
});
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.source.WMSGetFeatureInfoOptions}
|
|
*/
|
|
this.getFeatureInfoOptions_ = goog.isDef(options.getFeatureInfoOptions) ?
|
|
options.getFeatureInfoOptions : {};
|
|
|
|
/**
|
|
* @private
|
|
* @type {ol.Image}
|
|
*/
|
|
this.image_ = null;
|
|
|
|
/**
|
|
* @private
|
|
* @type {number}
|
|
*/
|
|
this.ratio_ = goog.isDef(options.ratio) ?
|
|
options.ratio : 1.5;
|
|
|
|
};
|
|
goog.inherits(ol.source.SingleImageWMS, ol.source.ImageSource);
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.source.SingleImageWMS.prototype.getImage =
|
|
function(extent, resolution, projection) {
|
|
resolution = this.findNearestResolution(resolution);
|
|
|
|
var image = this.image_;
|
|
if (!goog.isNull(image) &&
|
|
image.getResolution() == resolution &&
|
|
ol.extent.containsExtent(image.getExtent(), extent)) {
|
|
return image;
|
|
}
|
|
|
|
extent = extent.slice();
|
|
ol.extent.scaleFromCenter(extent, this.ratio_);
|
|
var width = (extent[1] - extent[0]) / resolution;
|
|
var height = (extent[3] - extent[2]) / resolution;
|
|
var size = [width, height];
|
|
|
|
this.image_ = this.createImage(extent, resolution, size, projection);
|
|
return this.image_;
|
|
};
|
|
|
|
|
|
/**
|
|
* @inheritDoc
|
|
*/
|
|
ol.source.SingleImageWMS.prototype.getFeatureInfoForPixel =
|
|
function(pixel, map, success, opt_error) {
|
|
var view2D = map.getView().getView2D(),
|
|
projection = view2D.getProjection(),
|
|
size = map.getSize(),
|
|
bottomLeft = map.getCoordinateFromPixel([0, size[1]]),
|
|
topRight = map.getCoordinateFromPixel([size[0], 0]),
|
|
extent = [bottomLeft[0], topRight[0], bottomLeft[1], topRight[1]],
|
|
url = this.imageUrlFunction(extent, size, projection);
|
|
goog.asserts.assert(goog.isDef(url),
|
|
'ol.source.SingleImageWMS#imageUrlFunction does not return a url');
|
|
ol.source.wms.getFeatureInfo(url, pixel, this.getFeatureInfoOptions_, success,
|
|
opt_error);
|
|
};
|