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271 lines
11 KiB
271 lines
11 KiB
3 years ago
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(function ( $ ) {
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/**
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* Holds google map object and related utility entities.
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* @constructor
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*/
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function GMapContext(domElement, options) {
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var _map = new google.maps.Map(domElement, options);
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var _marker = new google.maps.Marker({
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position: new google.maps.LatLng(54.19335, -3.92695),
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map: _map,
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title: "Drag Me",
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draggable: options.draggable
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});
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return {
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map: _map,
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marker: _marker,
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circle: null,
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location: _marker.position,
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radius: options.radius,
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locationName: options.locationName,
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settings: options.settings,
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domContainer: domElement,
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geodecoder: new google.maps.Geocoder()
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}
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}
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// Utility functions for Google Map Manipulations
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var GmUtility = {
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/**
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* Draw a circle over the the map. Returns circle object.
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* Also writes new circle object in gmapContext.
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*
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* @param center - LatLng of the center of the circle
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* @param radius - radius in meters
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* @param gmapContext - context
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* @param options
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*/
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drawCircle: function(gmapContext, center, radius, options) {
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if (gmapContext.circle != null) {
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gmapContext.circle.setMap(null);
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}
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if (radius > 0) {
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radius *= 1;
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options = $.extend({
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strokeColor: "#0000FF",
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strokeOpacity: 0.35,
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strokeWeight: 2,
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fillColor: "#0000FF",
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fillOpacity: 0.20
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}, options);
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options.map = gmapContext.map;
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options.radius = radius;
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options.center = center;
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gmapContext.circle = new google.maps.Circle(options);
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return gmapContext.circle;
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}
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return null;
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},
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/**
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*
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* @param gMapContext
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* @param location
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* @param callback
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*/
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setPosition: function(gMapContext, location, callback) {
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gMapContext.location = location;
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gMapContext.marker.setPosition(location);
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gMapContext.map.panTo(location);
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this.drawCircle(gMapContext, location, gMapContext.radius, {});
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if (gMapContext.settings.enableReverseGeocode) {
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gMapContext.geodecoder.geocode({latLng: gMapContext.location}, function(results, status){
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if (status == google.maps.GeocoderStatus.OK && results.length > 0){
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gMapContext.locationName = results[0].formatted_address;
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}
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if (callback) {
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callback.call(this, gMapContext);
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}
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});
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} else {
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if (callback) {
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callback.call(this, gMapContext);
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}
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}
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},
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locationFromLatLng: function(lnlg) {
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return {latitude: lnlg.lat(), longitude: lnlg.lng()}
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}
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}
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function isPluginApplied(domObj) {
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return getContextForElement(domObj) != undefined;
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}
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function getContextForElement(domObj) {
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return $(domObj).data("locationpicker");
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}
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function updateInputValues(inputBinding, gmapContext){
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if (!inputBinding) return;
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var currentLocation = GmUtility.locationFromLatLng(gmapContext.location);
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if (inputBinding.latitudeInput) {
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inputBinding.latitudeInput.val(currentLocation.latitude);
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}
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if (inputBinding.longitudeInput) {
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inputBinding.longitudeInput.val(currentLocation.longitude);
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}
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if (inputBinding.radiusInput) {
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inputBinding.radiusInput.val(gmapContext.radius);
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}
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if (inputBinding.locationNameInput) {
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inputBinding.locationNameInput.val(gmapContext.locationName);
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}
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}
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function setupInputListenersInput(inputBinding, gmapContext) {
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if (inputBinding) {
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if (inputBinding.radiusInput){
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inputBinding.radiusInput.on("change", function() {
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gmapContext.radius = $(this).val();
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GmUtility.setPosition(gmapContext, gmapContext.location, function(context){
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context.settings.onchanged(GmUtility.locationFromLatLng(context.location), context.radius, false);
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});
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});
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}
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if (inputBinding.locationNameInput && gmapContext.settings.enableAutocomplete) {
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gmapContext.autocomplete = new google.maps.places.Autocomplete(inputBinding.locationNameInput.get(0));
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google.maps.event.addListener(gmapContext.autocomplete, 'place_changed', function() {
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var place = gmapContext.autocomplete.getPlace();
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if (!place.geometry) {
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gmapContext.settings.onlocationnotfound(place.name);
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return;
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}
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GmUtility.setPosition(gmapContext, place.geometry.location, function(context) {
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updateInputValues(inputBinding, context);
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context.settings.onchanged(GmUtility.locationFromLatLng(context.location), context.radius, false);
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});
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});
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}
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if (inputBinding.latitudeInput) {
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inputBinding.latitudeInput.on("change", function() {
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GmUtility.setPosition(gmapContext, new google.maps.LatLng($(this).val(), gmapContext.location.lng()), function(context){
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context.settings.onchanged(GmUtility.locationFromLatLng(context.location), context.radius, false);
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});
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});
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}
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if (inputBinding.longitudeInput) {
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inputBinding.longitudeInput.on("change", function() {
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GmUtility.setPosition(gmapContext, new google.maps.LatLng(gmapContext.location.lat(), $(this).val()), function(context){
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context.settings.onchanged(GmUtility.locationFromLatLng(context.location), context.radius, false);
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});
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});
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}
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}
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}
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/**
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* Initialization:
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* $("#myMap").locationpicker(options);
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* @param options
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* @param params
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* @returns {*}
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*/
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$.fn.locationpicker = function( options, params ) {
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if (typeof options == 'string') { // Command provided
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var _targetDomElement = this.get(0);
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// Plug-in is not applied - nothing to do.
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if (!isPluginApplied(_targetDomElement)) return;
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var gmapContext = getContextForElement(_targetDomElement);
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switch (options) {
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case "location":
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if (params == undefined) { // Getter
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var location = GmUtility.locationFromLatLng(gmapContext.location);
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location.radius = gmapContext.radius;
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location.name = gmapContext.locationName;
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return location;
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} else { // Setter
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if (params.radius) {
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gmapContext.radius = params.radius;
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}
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GmUtility.setPosition(gmapContext, new google.maps.LatLng(params.latitude, params.longitude), function(gmapContext) {
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updateInputValues(gmapContext.settings.inputBinding, gmapContext);
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});
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}
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break;
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case "subscribe":
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/**
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* Provides interface for subscribing for GoogleMap events.
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* See Google API documentation for details.
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* Parameters:
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* - event: string, name of the event
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* - callback: function, callback function to be invoked
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*/
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if (options == undefined) { // Getter is not available
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return null;
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} else {
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var event = params.event;
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var callback = params.callback;
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if (!event || ! callback) {
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console.error("LocationPicker: Invalid arguments for method \"subscribe\"")
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return null;
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}
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google.maps.event.addListener(gmapContext.map, event, callback);
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}
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break;
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}
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return null;
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}
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return this.each(function() {
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var $target = $(this);
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// If plug-in hasn't been applied before - initialize, otherwise - skip
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if (isPluginApplied(this)) return;
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// Plug-in initialization is required
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// Defaults
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var settings = $.extend({}, $.fn.locationpicker.defaults, options );
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// Initialize
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var gmapContext = new GMapContext(this, {
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zoom: settings.zoom,
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center: new google.maps.LatLng(settings.location.latitude, settings.location.longitude),
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mapTypeId: google.maps.MapTypeId.ROADMAP,
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mapTypeControl: false,
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disableDoubleClickZoom: false,
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scrollwheel: settings.scrollwheel,
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streetViewControl: false,
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radius: settings.radius,
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locationName: settings.locationName,
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settings: settings,
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draggable: settings.draggable
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});
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$target.data("locationpicker", gmapContext);
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// Subscribe GMap events
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google.maps.event.addListener(gmapContext.marker, "dragend", function(event) {
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GmUtility.setPosition(gmapContext, gmapContext.marker.position, function(context){
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var currentLocation = GmUtility.locationFromLatLng(gmapContext.location);
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context.settings.onchanged(currentLocation, context.radius, true);
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updateInputValues(gmapContext.settings.inputBinding, gmapContext);
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});
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});
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GmUtility.setPosition(gmapContext, new google.maps.LatLng(settings.location.latitude, settings.location.longitude), function(context){
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updateInputValues(settings.inputBinding, gmapContext);
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context.settings.oninitialized($target);
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});
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// Set up input bindings if needed
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setupInputListenersInput(settings.inputBinding, gmapContext);
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});
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};
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$.fn.locationpicker.defaults = {
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location: {latitude: 40.7324319, longitude: -73.82480799999996},
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locationName: "",
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radius: 500,
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zoom: 15,
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scrollwheel: true,
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inputBinding: {
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latitudeInput: null,
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longitudeInput: null,
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radiusInput: null,
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locationNameInput: null
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},
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enableAutocomplete: false,
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enableReverseGeocode: true,
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draggable: true,
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onchanged: function(currentLocation, radius, isMarkerDropped) {},
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onlocationnotfound: function(locationName) {},
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oninitialized: function (component) {}
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}
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}( jQuery ));
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