More complex demo, showing a game with draggable polygons. See the draggable polygon demo for a simple demo with draggable polygons.
/**
* @constructor @struct @final
*/
function PuzzleDemo() {
/** @private {!Array<google.maps.Polygon>} */
this.polys_ = [];
/** @private {string} */
this.difficulty_ = 'easy';
/** @private {number} */
this.count_ = 0;
/** @private {?Element} */
this.pieceDiv_ = null;
/** @private {?Element} */
this.timeDiv_ = null;
}
/**
* @private {number}
*/
PuzzleDemo.NUM_PIECES_ = 10;
/**
* @private {string}
*/
PuzzleDemo.START_COLOR_ = '#3c79de';
/**
* @private {string}
*/
PuzzleDemo.END_COLOR_ = '#037e29';
/**
* @param {!google.maps.Map} map
*/
PuzzleDemo.prototype.init = function(map) {
this.map_ = map;
this.createMenu_(map);
this.setDifficultyStyle_();
this.loadData_();
};
/**
* @param {!google.maps.Map} map
*/
PuzzleDemo.prototype.createMenu_ = function(map) {
var menuDiv = document.createElement('div');
menuDiv.style.cssText =
'margin: 40px 10px; border-radius: 8px; height: 320px; width: 180px;' +
'background-color: white; font-size: 14px; font-family: Roboto;' +
'text-align: center; color: grey;line-height: 32px; overflow: hidden';
var titleDiv = document.createElement('div');
titleDiv.style.cssText =
'width: 100%; background-color: #4285f4; color: white; font-size: 20px;' +
'line-height: 40px;margin-bottom: 24px';
titleDiv.innerText = 'Game Options';
var pieceTitleDiv = document.createElement('div');
pieceTitleDiv.innerText = 'PIECE:';
pieceTitleDiv.style.fontWeight = '800';
var pieceDiv = this.pieceDiv_ = document.createElement('div');
pieceDiv.innerText = '0 / ' + PuzzleDemo.NUM_PIECES_;
var timeTitleDiv = document.createElement('div');
timeTitleDiv.innerText = 'TIME:';
timeTitleDiv.style.fontWeight = '800';
var timeDiv = this.timeDiv_ = document.createElement('div');
timeDiv.innerText = '0.0 seconds';
var difficultyTitleDiv = document.createElement('div');
difficultyTitleDiv.innerText = 'DIFFICULTY:';
difficultyTitleDiv.style.fontWeight = '800';
var difficultySelect = document.createElement('select');
['Easy', 'Moderate', 'Hard', 'Extreme'].forEach(function(level) {
var option = document.createElement('option');
option.value = level.toLowerCase();
option.innerText = level;
difficultySelect.appendChild(option);
});
difficultySelect.style.cssText =
'border: 2px solid lightgrey; background-color: white; color: #4275f4;' +
'padding: 6px;';
difficultySelect.onchange = function() {
this.setDifficulty_(difficultySelect.value);
this.resetGame_();
}.bind(this);
var resetDiv = document.createElement('div');
resetDiv.innerText = 'Reset';
resetDiv.style.cssText =
'cursor: pointer; border-top: 1px solid lightgrey; margin-top: 18px;' +
'color: #4275f4; line-height: 40px; font-weight: 800';
resetDiv.onclick = this.resetGame_.bind(this);
menuDiv.appendChild(titleDiv);
menuDiv.appendChild(pieceTitleDiv);
menuDiv.appendChild(pieceDiv);
menuDiv.appendChild(timeTitleDiv);
menuDiv.appendChild(timeDiv);
menuDiv.appendChild(difficultyTitleDiv);
menuDiv.appendChild(difficultySelect);
menuDiv.appendChild(resetDiv);
map.controls[google.maps.ControlPosition.TOP_LEFT].push(menuDiv);
};
/**
* @param {!google.maps.Map} map
*/
PuzzleDemo.prototype.render = function(map) {
if (!this.dataLoaded_) {
return;
}
this.start_();
};
/**
* @private
*/
PuzzleDemo.prototype.loadData_ = function() {
var xmlhttpRequest = new XMLHttpRequest;
xmlhttpRequest.onreadystatechange = function() {
if (xmlhttpRequest.status != 200 ||
xmlhttpRequest.readyState != XMLHttpRequest.DONE) return;
this.loadDataComplete_(JSON.parse(xmlhttpRequest.responseText));
}.bind(this);
xmlhttpRequest.open(
'GET', 'https://storage.googleapis.com/mapsdevsite/json/puzzle.json',
true);
xmlhttpRequest.send(null);
};
/**
* @param {!Array<{
* bounds: !Array<!Array<number>>,
* name: string,
* start: !Array<string>,
* end: !Array<string>
* }>} data
* @private
*/
PuzzleDemo.prototype.loadDataComplete_ = function(data) {
this.dataLoaded_ = true;
this.countries_ = data;
this.start_();
};
/**
* @param {string} difficulty
* @private
*/
PuzzleDemo.prototype.setDifficulty_ = function(difficulty) {
this.difficulty_ = difficulty;
if (this.map_) {
this.setDifficultyStyle_();
}
};
/**
* @private
*/
PuzzleDemo.prototype.setDifficultyStyle_ = function() {
var styles = {
'easy': [
{
stylers: [
{ visibility: 'off' }
]
},{
featureType: 'water',
stylers: [
{ visibility: 'on' },
{ color: '#d4d4d4' }
]
},{
featureType: 'landscape',
stylers: [
{ visibility: 'on' },
{ color: '#e5e3df' }
]
}, {
featureType: 'administrative.country',
elementType: 'labels',
stylers: [
{ visibility: 'on' }
]
}, {
featureType: 'administrative.country',
elementType: 'geometry',
stylers: [
{ visibility: 'on' },
{ weight: 1.3 }
]
}
],
'moderate': [
{
stylers: [
{ visibility: 'off' }
]
},{
featureType: 'water',
stylers: [
{ visibility: 'on' },
{ color: '#d4d4d4' }
]
},{
featureType: 'landscape',
stylers: [
{ visibility: 'on' },
{ color: '#e5e3df' }
]
}, {
featureType: 'administrative.country',
elementType: 'labels',
stylers: [
{ visibility: 'on' }
]
}
],
'hard': [
{
stylers: [
{ visibility: 'off' }
]
},{
featureType: 'water',
stylers: [
{ visibility: 'on' },
{ color: '#d4d4d4' }
]
},{
featureType: 'landscape',
stylers: [
{ visibility: 'on' },
{ color: '#e5e3df' }
]
}
],
'extreme': [
{
elementType: 'geometry',
stylers: [
{ visibility: 'off' }
]
}
]
};
this.map_.set('styles', styles[this.difficulty_]);
};
/**
* @private
*/
PuzzleDemo.prototype.resetGame_ = function() {
this.removeCountries_();
this.count_ = 0;
this.setCount_();
this.startClock_();
this.addRandomCountries_();
};
/**
* @private
*/
PuzzleDemo.prototype.setCount_ = function() {
this.pieceDiv_.innerText = this.count_ + ' / ' + PuzzleDemo.NUM_PIECES_;
if (this.count_ == PuzzleDemo.NUM_PIECES_) {
this.stopClock_();
}
};
/**
* @private
*/
PuzzleDemo.prototype.stopClock_ = function() {
window.clearInterval(this.timer_);
};
/**
* @private
*/
PuzzleDemo.prototype.startClock_ = function() {
this.stopClock_();
var timeDiv = this.timeDiv_;
if (timeDiv) timeDiv.textContent = '0.0 seconds';
var t = new Date;
this.timer_ = window.setInterval(function() {
var diff = new Date - t;
if (timeDiv) timeDiv.textContent = (diff / 1000).toFixed(2) + ' seconds';
}, 100);
};
/**
* @private
*/
PuzzleDemo.prototype.addRandomCountries_ = function() {
// Shuffle countries
this.countries_.sort(function() {
return Math.round(Math.random()) - 0.5;
});
var countries = this.countries_.slice(0, PuzzleDemo.NUM_PIECES_);
for (var i = 0, country; country = countries[i]; i++) {
this.addCountry_(country);
}
};
/**
* @param {{ * bounds: !Array<!Array<number>>,
* name: string,
* start: !Array<string>,
* end: !Array<string>
* }} country
* @private
*/
PuzzleDemo.prototype.addCountry_ = function(country) {
var options = {
strokeColor: PuzzleDemo.START_COLOR_,
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: PuzzleDemo.START_COLOR_,
fillOpacity: 0.35,
geodesic: true,
map: this.map_,
draggable: true,
zIndex: 2,
paths: country.start.map(google.maps.geometry.encoding.decodePath),
};
var poly = new google.maps.Polygon(options);
google.maps.event.addListener(poly, 'dragend', function() {
this.checkPosition_(poly, country);
}.bind(this));
this.polys_.push(poly);
};
/**
* Checks that every point in the polygon is inside the bounds.
* @param {!Array<number>} bounds
* @param {!google.maps.Polygon} poly
* @returns {boolean}
*/
PuzzleDemo.prototype.boundsContainsPoly_ = function(bounds, poly) {
var b = new google.maps.LatLngBounds(
new google.maps.LatLng(bounds[0][0], bounds[0][1]),
new google.maps.LatLng(bounds[1][0], bounds[1][1]));
var paths = poly.getPaths().getArray();
for (var i = 0; i < paths.length; i++) {
var p = paths[i].getArray();
for (var j = 0; j < p.length; j++) {
if (!b.contains(p[j])) {
return false;
}
}
}
return true;
};
/**
* Replace a poly with the correct 'end' position of the country.
* @param {google.maps.Polygon} poly
* @param {Object} country
* @private
*/
PuzzleDemo.prototype.replacePiece_ = function(poly, country) {
var options = {
strokeColor: PuzzleDemo.END_COLOR_,
fillColor: PuzzleDemo.END_COLOR_,
draggable: false,
zIndex: 1,
paths: country.end.map(google.maps.geometry.encoding.decodePath),
};
poly.setOptions(options);
this.count_++;
this.setCount_();
};
/**
* @param {google.maps.Polygon} poly
* @param {Object} country
* @private
*/
PuzzleDemo.prototype.checkPosition_ = function(poly, country) {
if (this.boundsContainsPoly_(country.bounds, poly)) {
this.replacePiece_(poly, country);
}
};
/**
* @private
*/
PuzzleDemo.prototype.start_ = function() {
this.setDifficultyStyle_();
this.resetGame_();
};
/**
* @private
*/
PuzzleDemo.prototype.removeCountries_ = function() {
for (var i = 0, poly; poly = this.polys_[i]; i++) {
poly.setMap(null);
};
this.polys_ = [];
};
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
disableDefaultUI: true,
center: {lat: 10, lng: 60},
zoom: 2
});
(new PuzzleDemo).init(map);
}
<div id="map"></div>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
<!-- Replace the value of the key parameter with your own API key. --> <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&libraries=geometry&callback=initMap" async defer></script>
Try it yourself
You can experiment with this code in JSFiddle by clicking the <> icon in the
top-right corner of the code window.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Map Puzzle</title>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
/**
* @constructor @struct @final
*/
function PuzzleDemo() {
/** @private {!Array<google.maps.Polygon>} */
this.polys_ = [];
/** @private {string} */
this.difficulty_ = 'easy';
/** @private {number} */
this.count_ = 0;
/** @private {?Element} */
this.pieceDiv_ = null;
/** @private {?Element} */
this.timeDiv_ = null;
}
/**
* @private {number}
*/
PuzzleDemo.NUM_PIECES_ = 10;
/**
* @private {string}
*/
PuzzleDemo.START_COLOR_ = '#3c79de';
/**
* @private {string}
*/
PuzzleDemo.END_COLOR_ = '#037e29';
/**
* @param {!google.maps.Map} map
*/
PuzzleDemo.prototype.init = function(map) {
this.map_ = map;
this.createMenu_(map);
this.setDifficultyStyle_();
this.loadData_();
};
/**
* @param {!google.maps.Map} map
*/
PuzzleDemo.prototype.createMenu_ = function(map) {
var menuDiv = document.createElement('div');
menuDiv.style.cssText =
'margin: 40px 10px; border-radius: 8px; height: 320px; width: 180px;' +
'background-color: white; font-size: 14px; font-family: Roboto;' +
'text-align: center; color: grey;line-height: 32px; overflow: hidden';
var titleDiv = document.createElement('div');
titleDiv.style.cssText =
'width: 100%; background-color: #4285f4; color: white; font-size: 20px;' +
'line-height: 40px;margin-bottom: 24px';
titleDiv.innerText = 'Game Options';
var pieceTitleDiv = document.createElement('div');
pieceTitleDiv.innerText = 'PIECE:';
pieceTitleDiv.style.fontWeight = '800';
var pieceDiv = this.pieceDiv_ = document.createElement('div');
pieceDiv.innerText = '0 / ' + PuzzleDemo.NUM_PIECES_;
var timeTitleDiv = document.createElement('div');
timeTitleDiv.innerText = 'TIME:';
timeTitleDiv.style.fontWeight = '800';
var timeDiv = this.timeDiv_ = document.createElement('div');
timeDiv.innerText = '0.0 seconds';
var difficultyTitleDiv = document.createElement('div');
difficultyTitleDiv.innerText = 'DIFFICULTY:';
difficultyTitleDiv.style.fontWeight = '800';
var difficultySelect = document.createElement('select');
['Easy', 'Moderate', 'Hard', 'Extreme'].forEach(function(level) {
var option = document.createElement('option');
option.value = level.toLowerCase();
option.innerText = level;
difficultySelect.appendChild(option);
});
difficultySelect.style.cssText =
'border: 2px solid lightgrey; background-color: white; color: #4275f4;' +
'padding: 6px;';
difficultySelect.onchange = function() {
this.setDifficulty_(difficultySelect.value);
this.resetGame_();
}.bind(this);
var resetDiv = document.createElement('div');
resetDiv.innerText = 'Reset';
resetDiv.style.cssText =
'cursor: pointer; border-top: 1px solid lightgrey; margin-top: 18px;' +
'color: #4275f4; line-height: 40px; font-weight: 800';
resetDiv.onclick = this.resetGame_.bind(this);
menuDiv.appendChild(titleDiv);
menuDiv.appendChild(pieceTitleDiv);
menuDiv.appendChild(pieceDiv);
menuDiv.appendChild(timeTitleDiv);
menuDiv.appendChild(timeDiv);
menuDiv.appendChild(difficultyTitleDiv);
menuDiv.appendChild(difficultySelect);
menuDiv.appendChild(resetDiv);
map.controls[google.maps.ControlPosition.TOP_LEFT].push(menuDiv);
};
/**
* @param {!google.maps.Map} map
*/
PuzzleDemo.prototype.render = function(map) {
if (!this.dataLoaded_) {
return;
}
this.start_();
};
/**
* @private
*/
PuzzleDemo.prototype.loadData_ = function() {
var xmlhttpRequest = new XMLHttpRequest;
xmlhttpRequest.onreadystatechange = function() {
if (xmlhttpRequest.status != 200 ||
xmlhttpRequest.readyState != XMLHttpRequest.DONE) return;
this.loadDataComplete_(JSON.parse(xmlhttpRequest.responseText));
}.bind(this);
xmlhttpRequest.open(
'GET', 'https://storage.googleapis.com/mapsdevsite/json/puzzle.json',
true);
xmlhttpRequest.send(null);
};
/**
* @param {!Array<{
* bounds: !Array<!Array<number>>,
* name: string,
* start: !Array<string>,
* end: !Array<string>
* }>} data
* @private
*/
PuzzleDemo.prototype.loadDataComplete_ = function(data) {
this.dataLoaded_ = true;
this.countries_ = data;
this.start_();
};
/**
* @param {string} difficulty
* @private
*/
PuzzleDemo.prototype.setDifficulty_ = function(difficulty) {
this.difficulty_ = difficulty;
if (this.map_) {
this.setDifficultyStyle_();
}
};
/**
* @private
*/
PuzzleDemo.prototype.setDifficultyStyle_ = function() {
var styles = {
'easy': [
{
stylers: [
{ visibility: 'off' }
]
},{
featureType: 'water',
stylers: [
{ visibility: 'on' },
{ color: '#d4d4d4' }
]
},{
featureType: 'landscape',
stylers: [
{ visibility: 'on' },
{ color: '#e5e3df' }
]
}, {
featureType: 'administrative.country',
elementType: 'labels',
stylers: [
{ visibility: 'on' }
]
}, {
featureType: 'administrative.country',
elementType: 'geometry',
stylers: [
{ visibility: 'on' },
{ weight: 1.3 }
]
}
],
'moderate': [
{
stylers: [
{ visibility: 'off' }
]
},{
featureType: 'water',
stylers: [
{ visibility: 'on' },
{ color: '#d4d4d4' }
]
},{
featureType: 'landscape',
stylers: [
{ visibility: 'on' },
{ color: '#e5e3df' }
]
}, {
featureType: 'administrative.country',
elementType: 'labels',
stylers: [
{ visibility: 'on' }
]
}
],
'hard': [
{
stylers: [
{ visibility: 'off' }
]
},{
featureType: 'water',
stylers: [
{ visibility: 'on' },
{ color: '#d4d4d4' }
]
},{
featureType: 'landscape',
stylers: [
{ visibility: 'on' },
{ color: '#e5e3df' }
]
}
],
'extreme': [
{
elementType: 'geometry',
stylers: [
{ visibility: 'off' }
]
}
]
};
this.map_.set('styles', styles[this.difficulty_]);
};
/**
* @private
*/
PuzzleDemo.prototype.resetGame_ = function() {
this.removeCountries_();
this.count_ = 0;
this.setCount_();
this.startClock_();
this.addRandomCountries_();
};
/**
* @private
*/
PuzzleDemo.prototype.setCount_ = function() {
this.pieceDiv_.innerText = this.count_ + ' / ' + PuzzleDemo.NUM_PIECES_;
if (this.count_ == PuzzleDemo.NUM_PIECES_) {
this.stopClock_();
}
};
/**
* @private
*/
PuzzleDemo.prototype.stopClock_ = function() {
window.clearInterval(this.timer_);
};
/**
* @private
*/
PuzzleDemo.prototype.startClock_ = function() {
this.stopClock_();
var timeDiv = this.timeDiv_;
if (timeDiv) timeDiv.textContent = '0.0 seconds';
var t = new Date;
this.timer_ = window.setInterval(function() {
var diff = new Date - t;
if (timeDiv) timeDiv.textContent = (diff / 1000).toFixed(2) + ' seconds';
}, 100);
};
/**
* @private
*/
PuzzleDemo.prototype.addRandomCountries_ = function() {
// Shuffle countries
this.countries_.sort(function() {
return Math.round(Math.random()) - 0.5;
});
var countries = this.countries_.slice(0, PuzzleDemo.NUM_PIECES_);
for (var i = 0, country; country = countries[i]; i++) {
this.addCountry_(country);
}
};
/**
* @param {{ * bounds: !Array<!Array<number>>,
* name: string,
* start: !Array<string>,
* end: !Array<string>
* }} country
* @private
*/
PuzzleDemo.prototype.addCountry_ = function(country) {
var options = {
strokeColor: PuzzleDemo.START_COLOR_,
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: PuzzleDemo.START_COLOR_,
fillOpacity: 0.35,
geodesic: true,
map: this.map_,
draggable: true,
zIndex: 2,
paths: country.start.map(google.maps.geometry.encoding.decodePath),
};
var poly = new google.maps.Polygon(options);
google.maps.event.addListener(poly, 'dragend', function() {
this.checkPosition_(poly, country);
}.bind(this));
this.polys_.push(poly);
};
/**
* Checks that every point in the polygon is inside the bounds.
* @param {!Array<number>} bounds
* @param {!google.maps.Polygon} poly
* @returns {boolean}
*/
PuzzleDemo.prototype.boundsContainsPoly_ = function(bounds, poly) {
var b = new google.maps.LatLngBounds(
new google.maps.LatLng(bounds[0][0], bounds[0][1]),
new google.maps.LatLng(bounds[1][0], bounds[1][1]));
var paths = poly.getPaths().getArray();
for (var i = 0; i < paths.length; i++) {
var p = paths[i].getArray();
for (var j = 0; j < p.length; j++) {
if (!b.contains(p[j])) {
return false;
}
}
}
return true;
};
/**
* Replace a poly with the correct 'end' position of the country.
* @param {google.maps.Polygon} poly
* @param {Object} country
* @private
*/
PuzzleDemo.prototype.replacePiece_ = function(poly, country) {
var options = {
strokeColor: PuzzleDemo.END_COLOR_,
fillColor: PuzzleDemo.END_COLOR_,
draggable: false,
zIndex: 1,
paths: country.end.map(google.maps.geometry.encoding.decodePath),
};
poly.setOptions(options);
this.count_++;
this.setCount_();
};
/**
* @param {google.maps.Polygon} poly
* @param {Object} country
* @private
*/
PuzzleDemo.prototype.checkPosition_ = function(poly, country) {
if (this.boundsContainsPoly_(country.bounds, poly)) {
this.replacePiece_(poly, country);
}
};
/**
* @private
*/
PuzzleDemo.prototype.start_ = function() {
this.setDifficultyStyle_();
this.resetGame_();
};
/**
* @private
*/
PuzzleDemo.prototype.removeCountries_ = function() {
for (var i = 0, poly; poly = this.polys_[i]; i++) {
poly.setMap(null);
};
this.polys_ = [];
};
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
disableDefaultUI: true,
center: {lat: 10, lng: 60},
zoom: 2
});
(new PuzzleDemo).init(map);
}
</script>
<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=geometry&callback=initMap"
async defer></script>
</body>
</html>