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Project_Code_8_GeocodingInTheApp.html
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Project_Code_8_GeocodingInTheApp.html
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<!DOCTYPE html>
<html>
<head>
<style>
html,
body {
font-family: Arial, sans-serif;
height: 100%;
margin: 0;
padding: 0;
}
.container {
height: 100%;
position: relative;
}
input {
font-size: 12px;
}
h1 {
color: #525454;
font-size: 22px;
margin: 0 0 10px 0;
text-align: center;
}
#hide-listings,
#show-listings {
width: 48%;
}
hr {
background: #D0D7D9;
height: 1px;
margin: 20px 0 20px 0;
border: none;
}
#map {
bottom:0px;
height: 100%;
left: 362px;
position: absolute;
right: 0px;
}
.options-box {
background: #fff;
border: 1px solid #999;
border-radius: 3px;
height: 100%;
line-height: 35px;
padding: 10px 10px 30px 10px;
text-align: left;
width: 340px;
}
#pano {
width: 200px;
height: 200px;
}
.text {
font-size: 12px;
}
#toggle-drawing {
width: 27%;
position: relative;
margin-left: 10px;
}
#zoom-to-area-text {
position: relative;
width: 70%;
}
#zoom-to-area {
width: 24%;
}
</style>
</head>
<body>
<div class="container">
<div class="options-box">
<h1>Find Your New NYC Home</h1>
<div>
<input id="show-listings" type="button" value="Show Listings">
<input id="hide-listings" type="button" value="Hide Listings">
<hr>
<span class="text"> Draw a shape to search within it for homes!</span>
<input id="toggle-drawing" type="button" value="Drawing Tools">
</div>
<hr>
<div>
<input id="zoom-to-area-text" type="text" placeholder="Enter your favorite area!">
<input id="zoom-to-area" type="button" value="Zoom">
</div>
</div>
<div id="map"></div>
</div>
<script>
var map;
// Create a new blank array for all the listing markers.
var markers = [];
// This global polygon variable is to ensure only ONE polygon is rendered.
var polygon = null;
function initMap() {
// Create a styles array to use with the map.
var styles = [
{
featureType: 'water',
stylers: [
{ color: '#19a0d8' }
]
},{
featureType: 'administrative',
elementType: 'labels.text.stroke',
stylers: [
{ color: '#ffffff' },
{ weight: 6 }
]
},{
featureType: 'administrative',
elementType: 'labels.text.fill',
stylers: [
{ color: '#e85113' }
]
},{
featureType: 'road.highway',
elementType: 'geometry.stroke',
stylers: [
{ color: '#efe9e4' },
{ lightness: -40 }
]
},{
featureType: 'transit.station',
stylers: [
{ weight: 9 },
{ hue: '#e85113' }
]
},{
featureType: 'road.highway',
elementType: 'labels.icon',
stylers: [
{ visibility: 'off' }
]
},{
featureType: 'water',
elementType: 'labels.text.stroke',
stylers: [
{ lightness: 100 }
]
},{
featureType: 'water',
elementType: 'labels.text.fill',
stylers: [
{ lightness: -100 }
]
},{
featureType: 'poi',
elementType: 'geometry',
stylers: [
{ visibility: 'on' },
{ color: '#f0e4d3' }
]
},{
featureType: 'road.highway',
elementType: 'geometry.fill',
stylers: [
{ color: '#efe9e4' },
{ lightness: -25 }
]
}
];
// Constructor creates a new map - only center and zoom are required.
map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 40.7413549, lng: -73.9980244},
zoom: 13,
styles: styles,
mapTypeControl: false
});
// These are the real estate listings that will be shown to the user.
// Normally we'd have these in a database instead.
var locations = [
{title: 'Park Ave Penthouse', location: {lat: 40.7713024, lng: -73.9632393}},
{title: 'Chelsea Loft', location: {lat: 40.7444883, lng: -73.9949465}},
{title: 'Union Square Open Floor Plan', location: {lat: 40.7347062, lng: -73.9895759}},
{title: 'East Village Hip Studio', location: {lat: 40.7281777, lng: -73.984377}},
{title: 'TriBeCa Artsy Bachelor Pad', location: {lat: 40.7195264, lng: -74.0089934}},
{title: 'Chinatown Homey Space', location: {lat: 40.7180628, lng: -73.9961237}}
];
var largeInfowindow = new google.maps.InfoWindow();
// Initialize the drawing manager.
var drawingManager = new google.maps.drawing.DrawingManager({
drawingMode: google.maps.drawing.OverlayType.POLYGON,
drawingControl: true,
drawingControlOptions: {
position: google.maps.ControlPosition.TOP_LEFT,
drawingModes: [
google.maps.drawing.OverlayType.POLYGON
]
}
});
// Style the markers a bit. This will be our listing marker icon.
var defaultIcon = makeMarkerIcon('0091ff');
// Create a "highlighted location" marker color for when the user
// mouses over the marker.
var highlightedIcon = makeMarkerIcon('FFFF24');
// The following group uses the location array to create an array of markers on initialize.
for (var i = 0; i < locations.length; i++) {
// Get the position from the location array.
var position = locations[i].location;
var title = locations[i].title;
// Create a marker per location, and put into markers array.
var marker = new google.maps.Marker({
position: position,
title: title,
animation: google.maps.Animation.DROP,
icon: defaultIcon,
id: i
});
// Push the marker to our array of markers.
markers.push(marker);
// Create an onclick event to open the large infowindow at each marker.
marker.addListener('click', function() {
populateInfoWindow(this, largeInfowindow);
});
// Two event listeners - one for mouseover, one for mouseout,
// to change the colors back and forth.
marker.addListener('mouseover', function() {
this.setIcon(highlightedIcon);
});
marker.addListener('mouseout', function() {
this.setIcon(defaultIcon);
});
}
document.getElementById('show-listings').addEventListener('click', showListings);
document.getElementById('hide-listings').addEventListener('click', hideListings);
document.getElementById('toggle-drawing').addEventListener('click', function() {
toggleDrawing(drawingManager);
});
document.getElementById('zoom-to-area').addEventListener('click', function() {
zoomToArea();
});
// Add an event listener so that the polygon is captured, call the
// searchWithinPolygon function. This will show the markers in the polygon,
// and hide any outside of it.
drawingManager.addListener('overlaycomplete', function(event) {
// First, check if there is an existing polygon.
// If there is, get rid of it and remove the markers
if (polygon) {
polygon.setMap(null);
hideListings(markers);
}
// Switching the drawing mode to the HAND (i.e., no longer drawing).
drawingManager.setDrawingMode(null);
// Creating a new editable polygon from the overlay.
polygon = event.overlay;
polygon.setEditable(true);
// Searching within the polygon.
searchWithinPolygon();
// Make sure the search is re-done if the poly is changed.
polygon.getPath().addListener('set_at', searchWithinPolygon);
polygon.getPath().addListener('insert_at', searchWithinPolygon);
});
}
// This function populates the infowindow when the marker is clicked. We'll only allow
// one infowindow which will open at the marker that is clicked, and populate based
// on that markers position.
function populateInfoWindow(marker, infowindow) {
// Check to make sure the infowindow is not already opened on this marker.
if (infowindow.marker != marker) {
// Clear the infowindow content to give the streetview time to load.
infowindow.setContent('');
infowindow.marker = marker;
// Make sure the marker property is cleared if the infowindow is closed.
infowindow.addListener('closeclick', function() {
infowindow.marker = null;
});
var streetViewService = new google.maps.StreetViewService();
var radius = 50;
// In case the status is OK, which means the pano was found, compute the
// position of the streetview image, then calculate the heading, then get a
// panorama from that and set the options
function getStreetView(data, status) {
if (status == google.maps.StreetViewStatus.OK) {
var nearStreetViewLocation = data.location.latLng;
var heading = google.maps.geometry.spherical.computeHeading(
nearStreetViewLocation, marker.position);
infowindow.setContent('<div>' + marker.title + '</div><div id="pano"></div>');
var panoramaOptions = {
position: nearStreetViewLocation,
pov: {
heading: heading,
pitch: 30
}
};
var panorama = new google.maps.StreetViewPanorama(
document.getElementById('pano'), panoramaOptions);
} else {
infowindow.setContent('<div>' + marker.title + '</div>' +
'<div>No Street View Found</div>');
}
}
// Use streetview service to get the closest streetview image within
// 50 meters of the markers position
streetViewService.getPanoramaByLocation(marker.position, radius, getStreetView);
// Open the infowindow on the correct marker.
infowindow.open(map, marker);
}
}
// This function will loop through the markers array and display them all.
function showListings() {
var bounds = new google.maps.LatLngBounds();
// Extend the boundaries of the map for each marker and display the marker
for (var i = 0; i < markers.length; i++) {
markers[i].setMap(map);
bounds.extend(markers[i].position);
}
map.fitBounds(bounds);
}
// This function will loop through the listings and hide them all.
function hideListings() {
for (var i = 0; i < markers.length; i++) {
markers[i].setMap(null);
}
}
// This function takes in a COLOR, and then creates a new marker
// icon of that color. The icon will be 21 px wide by 34 high, have an origin
// of 0, 0 and be anchored at 10, 34).
function makeMarkerIcon(markerColor) {
var markerImage = new google.maps.MarkerImage(
'http://chart.googleapis.com/chart?chst=d_map_spin&chld=1.15|0|'+ markerColor +
'|40|_|%E2%80%A2',
new google.maps.Size(21, 34),
new google.maps.Point(0, 0),
new google.maps.Point(10, 34),
new google.maps.Size(21,34));
return markerImage;
}
// This shows and hides (respectively) the drawing options.
function toggleDrawing(drawingManager) {
if (drawingManager.map) {
drawingManager.setMap(null);
// In case the user drew anything, get rid of the polygon
if (polygon !== null) {
polygon.setMap(null);
}
} else {
drawingManager.setMap(map);
}
}
// This function hides all markers outside the polygon,
// and shows only the ones within it. This is so that the
// user can specify an exact area of search.
function searchWithinPolygon() {
for (var i = 0; i < markers.length; i++) {
if (google.maps.geometry.poly.containsLocation(markers[i].position, polygon)) {
markers[i].setMap(map);
} else {
markers[i].setMap(null);
}
}
}
// This function takes the input value in the find nearby area text input
// locates it, and then zooms into that area. This is so that the user can
// show all listings, then decide to focus on one area of the map.
function zoomToArea() {
// Initialize the geocoder.
var geocoder = new google.maps.Geocoder();
// Get the address or place that the user entered.
var address = document.getElementById('zoom-to-area-text').value;
// Make sure the address isn't blank.
if (address == '') {
window.alert('You must enter an area, or address.');
} else {
// Geocode the address/area entered to get the center. Then, center the map
// on it and zoom in
geocoder.geocode(
{ address: address,
componentRestrictions: {locality: 'New York'}
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
map.setZoom(15);
} else {
window.alert('We could not find that location - try entering a more' +
' specific place.');
}
});
}
}
</script>
<script async defer
src=
"https://maps.googleapis.com/maps/api/js?libraries=geometry,drawing&key=MYAPIKEY&v=3&callback=initMap">
</script>
</body>
</html>