184 lines
4.2 KiB
JavaScript
184 lines
4.2 KiB
JavaScript
goog.require('ol.Feature');
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goog.require('ol.Map');
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goog.require('ol.View');
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goog.require('ol.geom.LineString');
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goog.require('ol.geom.Point');
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goog.require('ol.geom.Polygon');
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goog.require('ol.interaction');
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goog.require('ol.interaction.Pointer');
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goog.require('ol.layer.Tile');
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goog.require('ol.layer.Vector');
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goog.require('ol.source.TileJSON');
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goog.require('ol.source.Vector');
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goog.require('ol.style.Fill');
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goog.require('ol.style.Icon');
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goog.require('ol.style.Stroke');
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goog.require('ol.style.Style');
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/**
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* Define a namespace for the application.
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*/
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var app = {};
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/**
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* @constructor
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* @extends {ol.interaction.Pointer}
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*/
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app.Drag = function() {
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ol.interaction.Pointer.call(this, {
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handleDownEvent: app.Drag.prototype.handleDownEvent,
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handleDragEvent: app.Drag.prototype.handleDragEvent,
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handleMoveEvent: app.Drag.prototype.handleMoveEvent,
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handleUpEvent: app.Drag.prototype.handleUpEvent
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});
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/**
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* @type {ol.Pixel}
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* @private
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*/
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this.coordinate_ = null;
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/**
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* @type {string|undefined}
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* @private
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*/
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this.cursor_ = 'pointer';
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/**
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* @type {ol.Feature}
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* @private
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*/
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this.feature_ = null;
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/**
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* @type {string|undefined}
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* @private
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*/
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this.previousCursor_ = undefined;
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};
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ol.inherits(app.Drag, ol.interaction.Pointer);
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/**
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* @param {ol.MapBrowserEvent} evt Map browser event.
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* @return {boolean} `true` to start the drag sequence.
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*/
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app.Drag.prototype.handleDownEvent = function(evt) {
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var map = evt.map;
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var feature = map.forEachFeatureAtPixel(evt.pixel,
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function(feature) {
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return feature;
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});
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if (feature) {
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this.coordinate_ = evt.coordinate;
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this.feature_ = feature;
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}
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return !!feature;
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};
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/**
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* @param {ol.MapBrowserEvent} evt Map browser event.
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*/
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app.Drag.prototype.handleDragEvent = function(evt) {
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var deltaX = evt.coordinate[0] - this.coordinate_[0];
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var deltaY = evt.coordinate[1] - this.coordinate_[1];
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var geometry = /** @type {ol.geom.SimpleGeometry} */
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(this.feature_.getGeometry());
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geometry.translate(deltaX, deltaY);
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this.coordinate_[0] = evt.coordinate[0];
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this.coordinate_[1] = evt.coordinate[1];
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};
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/**
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* @param {ol.MapBrowserEvent} evt Event.
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*/
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app.Drag.prototype.handleMoveEvent = function(evt) {
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if (this.cursor_) {
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var map = evt.map;
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var feature = map.forEachFeatureAtPixel(evt.pixel,
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function(feature) {
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return feature;
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});
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var element = evt.map.getTargetElement();
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if (feature) {
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if (element.style.cursor != this.cursor_) {
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this.previousCursor_ = element.style.cursor;
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element.style.cursor = this.cursor_;
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}
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} else if (this.previousCursor_ !== undefined) {
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element.style.cursor = this.previousCursor_;
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this.previousCursor_ = undefined;
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}
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}
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};
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/**
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* @return {boolean} `false` to stop the drag sequence.
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*/
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app.Drag.prototype.handleUpEvent = function() {
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this.coordinate_ = null;
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this.feature_ = null;
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return false;
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};
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var pointFeature = new ol.Feature(new ol.geom.Point([0, 0]));
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var lineFeature = new ol.Feature(
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new ol.geom.LineString([[-1e7, 1e6], [-1e6, 3e6]]));
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var polygonFeature = new ol.Feature(
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new ol.geom.Polygon([[[-3e6, -1e6], [-3e6, 1e6],
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[-1e6, 1e6], [-1e6, -1e6], [-3e6, -1e6]]]));
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var map = new ol.Map({
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interactions: ol.interaction.defaults().extend([new app.Drag()]),
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layers: [
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new ol.layer.Tile({
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source: new ol.source.TileJSON({
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url: 'http://api.tiles.mapbox.com/v3/mapbox.geography-class.json'
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})
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}),
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new ol.layer.Vector({
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source: new ol.source.Vector({
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features: [pointFeature, lineFeature, polygonFeature]
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}),
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style: new ol.style.Style({
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image: new ol.style.Icon(/** @type {olx.style.IconOptions} */ ({
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anchor: [0.5, 46],
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anchorXUnits: 'fraction',
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anchorYUnits: 'pixels',
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opacity: 0.95,
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src: 'data/icon.png'
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})),
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stroke: new ol.style.Stroke({
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width: 3,
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color: [255, 0, 0, 1]
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}),
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fill: new ol.style.Fill({
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color: [0, 0, 255, 0.6]
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})
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})
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})
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],
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target: 'map',
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view: new ol.View({
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center: [0, 0],
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zoom: 2
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})
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});
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