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