I am just starting out with javascript and I am trying to create an interactive web map....
I want to be able to position the map then press a button that will take a screenshot and save it to the computer.
Here is the code for my map.....
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Display a map on a webpage</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v2.9.1/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v2.9.1/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<div id="map"></div>
<script>
mapboxgl.accessToken = '[TOKEN]';
const map = new mapboxgl.Map({
container: 'map', // container ID
style: 'mapbox://styles/charlie-enright/cl5b8bjil002y14o5u8xrssah', // style URL
center: [-4.369240916438415, 51.925803756014965], // starting position [lng, lat]
zoom: 8, // starting zoom
projection: 'globe' // display the map as a 3D globe
});
map.on('style.load', () => {
map.setFog({}); // Set the default atmosphere style
});
</script>
</body>
</html>
I have tried using html2canvas (https://codepen.io/samsammurphy/pen/VXdOPv) but the button seems to end up in a layer behind my map and I can not take a screenshot of the displayed map.
Any ideas how I could create a button that allows for a screenshot to be taken which saves to the computer will be greatly appreciated.
Thanks,
Here's an example of using map.getCanvas().toDataURL() and then injecting an img tag into the DOM. (This is not my example, I found it on this codepen by Sam Murphy https://codepen.io/samsammurphy/pen/VXdOPv)
$('button').click(function() {
var img = map.getCanvas().toDataURL();
var width = $('#screenshotPlaceholder').width()
var height = $('#screenshotPlaceholder').height()
var imgHTML = `<img src="${img}", width=${width}, height = ${height}/>`
$('#screenshotPlaceholder').empty();
$('#screenshotPlaceholder').append(imgHTML);
});
});
The codepen I found this on was not working due to an expired access token, so here's a fork that works if you want to try it out.
https://codepen.io/chriswhong/pen/YzapomG
Here's the code I use to take map screenshots using html2canvas
html2canvas(document.getElementById("map"), {useCORS:true}).then(canvas => {
var pseudolink = document.createElement('a');
pseudolink.download = 'myMapScreenshot.png';
pseudolink.href = canvas.toDataURL()
pseudolink.click();
})
I have implemented a Tawk.to widget on my wordpress website. But as you can see in the image below(mobile version) the widget is overlapping the call us button which I don't want. By default the Tawk.to widget doesn't allow to override their css. Let me know your thoughts on this one.
There is a way that you can override their default css with your custom css. Check the below code:
<!--Start of Tawk.to Script-->
<script type="text/javascript">
var Tawk_API=Tawk_API||{}, Tawk_LoadStart=new Date();
(function(){
var s1=document.createElement("script"),s0=document.getElementsByTagName("script")[0];
s1.async=true;
s1.src='https://embed.tawk.to/60f038e2d6e7610a49ab6e35/1fal5sduv';
s1.charset='UTF-8';
s1.setAttribute('crossorigin','*');
s0.parentNode.insertBefore(s1,s0);
})();
</script>
<!--End of Tawk.to Script-->
var def_tawk_bottom = "20px"; /*This is their default style that I want to change*/
var def_tawk_right = "16px"; /*This is their default style that I want to change*/
var customize_tawk = ""; /*Interval object*/
function customize_tawk_widget(){
var cur_bottom = jQuery("iframe[title='chat widget']").eq(0).css('bottom'); /*Get the default style*/
var cur_right = jQuery("iframe[title='chat widget']").eq(0).css('right'); /*Get the default style*/
if(cur_bottom == def_tawk_bottom && cur_right == def_tawk_right){
/*Check if the default style exists then remove it and add my custom style*/
jQuery("iframe[title='chat widget']").eq(0).css({ 'right': '', 'bottom': '' });
jQuery("iframe[title='chat widget']").eq(0).addClass("custom-chat-widget");
clearInterval(customize_tawk);
}
}
/*Customize the widget as soon as the widget is loaded*/
Tawk_API = Tawk_API || {};
Tawk_API.onLoad = function(){
/*Only for mobile version*/
if(/android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test(navigator.userAgent) ) {
var customize_tawk = setInterval(customize_tawk_widget, 100);
}
};
/*Customize the widget as soon as the widget is minimized*/
Tawk_API = Tawk_API || {};
Tawk_API.onChatMinimized = function(){
/*Only for mobile version*/
if(/android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test(navigator.userAgent) ) {
var customize_tawk = setInterval(customize_tawk_widget, 100);
}
};
Although it is quite late answer but I'm posting it here because some one may get benefited with it. After a lot of googling about the topic I found that it is quite simple to change tawk.to placement. Below sample will make it evident. I used following code and of course I've changed the sl.src value in the code below. Just place the snippet obtained from tawk.to before tag and then place the custom styling code just before the tag of that snippet as can be seen in the example below.
<!--Start of Tawk.to Script-->
<script type="text/javascript">
var Tawk_API = Tawk_API || {},
Tawk_LoadStart = new Date();
(function () {
var s1 = document.createElement("script"),
s0 = document.getElementsByTagName("script")[0];
s1.async = true;
s1.src = 'https://embed.tawk.to/620929a89k40e$6ywsv/ry953*(*fqsdgl';
s1.charset = 'UTF-8';
s1.setAttribute('crossorigin', '*');
s0.parentNode.insertBefore(s1, s0);
})();
// Custom styling of Offset starts here
Tawk_API.customStyle = {
visibility: {
//for desktop only
desktop: {
position: 'br', // bottom-right
xOffset: 15, // 15px away from right
yOffset: 40 // 40px up from bottom
},
// for mobile only
mobile: {
position: 'bl', // bottom-left
xOffset: 5, // 5px away from left
yOffset: 50 // 50px up from bottom
},
// change settings of bubble if necessary
bubble: {
rotate: '0deg',
xOffset: -20,
yOffset: 0
}
}
</script>
<!--End of Tawk.to Script-->
for more information you can check here
https://help.tawk.to/article/customizing-your-widget-placement-with-the-javascript-api
Sorry its my first answer on stackexchange so I don't know how to hide 'Run Code Snippet' button as it'll do nothing here
Worry no more, it's just a little hack but does the job
setTimeout(function() { $("#mytawkdiv iframe").contents().find("head").append($('<style type="text/css">YOUR STYLES eg. input { display: none; }</style>'); }), 20);
Add this snippet to your javascript before the tag
Increase or decrease the setTimout (20) as needed.
Enjoy! Dex..
I have incorporated leaflet draw in one of my projects. My issue is that the icons were not displaying in the tool bar. It looked like this:
Looking around I found THIS post and did as it stated. I located the spritesheet in the Leaflet Draw folder and linked to it like htis:
.leaflet-draw-toolbar a {
background-image: url('E:/MappingProject/Leaflet.Draw/src/images/spritesheet.png');
background-repeat: no-repeat;
}
I ended up with this:
I can't seem to find any other solutions to get this spritesheet to line up in the boxes. It looks like instead of pulling individual icons, it's putting the entire sheet in each button.
Here is my code to instantiate the L.FeatureGroup() and L.Control.Draw():
function logIn(){
map = L.map('map').setView([51.505, -0.09], 13);
OpenStreetMap_HOT.addTo(map);
$("#logInScreen").css('display', 'none');
addSideBars();
addDrawToMap();
}
/////////////////////////////////////////////
//DRAW FUNCTIONALITY
///////////////////////////////////////////
function addDrawToMap(){
map.addControl(drawControl);
map.addLayer(drawnItems);
}
var drawnItems = new L.FeatureGroup();
var drawControl = new L.Control.Draw({
position: 'topright',
draw: {
polyline: true,
polygon: true,
circle: true,
marker: true
},
edit: {
featureGroup: drawnItems,
remove: true
}
});
Any one have experience with this?
Most probably you miss the Leaflet-draw CSS file.
It is in that file that the CSS rules like .leaflet-draw-toolbar a are defined.
Example without this file, but with your CSS rule:
var map = L.map('map').setView([48.86, 2.35], 11);
L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
attribution: '© OpenStreetMap contributors'
}).addTo(map);
var drawControl = new L.Control.Draw({
position: 'topright'
});
map.addControl(drawControl);
.leaflet-draw-toolbar a {
background-image: url('https://unpkg.com/leaflet-draw#1.0.2/dist/images/spritesheet.png');
background-repeat: no-repeat;
color: transparent !important;
}
<link rel="stylesheet" href="https://unpkg.com/leaflet#1.3.1/dist/leaflet.css" integrity="sha512-Rksm5RenBEKSKFjgI3a41vrjkw4EVPlJ3+OiI65vTjIdo9brlAacEuKOiQ5OFh7cOI1bkDwLqdLw3Zg0cRJAAQ==" crossorigin="" />
<script src="https://unpkg.com/leaflet#1.3.1/dist/leaflet-src.js" integrity="sha512-IkGU/uDhB9u9F8k+2OsA6XXoowIhOuQL1NTgNZHY1nkURnqEGlDZq3GsfmdJdKFe1k1zOc6YU2K7qY+hF9AodA==" crossorigin=""></script>
<script src="https://unpkg.com/leaflet-draw#1.0.2/dist/leaflet.draw-src.js"></script>
<div id="map" style="height: 200px"></div>
Example with this file:
var map = L.map('map').setView([48.86, 2.35], 11);
L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
attribution: '© OpenStreetMap contributors'
}).addTo(map);
var drawControl = new L.Control.Draw({
position: 'topright'
});
map.addControl(drawControl);
<link rel="stylesheet" href="https://unpkg.com/leaflet#1.3.1/dist/leaflet.css" integrity="sha512-Rksm5RenBEKSKFjgI3a41vrjkw4EVPlJ3+OiI65vTjIdo9brlAacEuKOiQ5OFh7cOI1bkDwLqdLw3Zg0cRJAAQ==" crossorigin="" />
<script src="https://unpkg.com/leaflet#1.3.1/dist/leaflet-src.js" integrity="sha512-IkGU/uDhB9u9F8k+2OsA6XXoowIhOuQL1NTgNZHY1nkURnqEGlDZq3GsfmdJdKFe1k1zOc6YU2K7qY+hF9AodA==" crossorigin=""></script>
<link rel="stylesheet" href="https://unpkg.com/leaflet-draw#1.0.2/dist/leaflet.draw-src.css" />
<script src="https://unpkg.com/leaflet-draw#1.0.2/dist/leaflet.draw-src.js"></script>
<div id="map" style="height: 200px"></div>
If you are using Angular, just add a link to the css file in your styles.css
#import "~leaflet/dist/leaflet.css";
#import "~leaflet-draw/dist/leaflet.draw.css";
I have a Blogger page with an embedded Google map which works fine. When I try to use Google's Javascript API to add a KML layer on top of the map the map becomes entirely black apart from the navigation controls. If I set the kml layer back to null the underlying map appears again.
I have tested the exact same code in a local environment and it works fine. So the issue is with embedding the code within a Blogger page.
Below is my html and js. Does anyone have any idea what the issue might be?
Note that the example kml file I'm using below is just a skeleton without any placemarkers, but I've tried it with other kmls and got the same result.
<html>
<head>
<style type="text/css">
#map-canvas {
height: 480px;
width: 500px;
margin: 0px;
padding: 0px
}
</style>
<script src="https://maps.googleapis.com/maps/api/js?v=3" type="text/javascript"/>
<script type="text/javascript">
function initializeMap() {
var centre = new google.maps.LatLng(35.5906421,37.6945915);
var mapOptions = {
zoom: 3,
center: centre,
mapTypeId: google.maps.MapTypeId.TERRAIN
}
var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var layer = new google.maps.KmlLayer({
url: 'http://trackmytour.com/Dpxc9.kml',
preserveViewport: true
});
layer.setMap(map);
}
google.maps.event.addDomListener(window, 'load', initializeMap);
</script>
</head>
<body>
<p>
Here is where I'll be tracking my progress.<br>
<br>
<br>
</p>
<div id="map-canvas"/>
</body>
</html>
I have successfully imported a kml file to a Google map so that it displays real estate boundaries.
I have also used the tutorial at https://google-developers.appspot.com/maps/documentation/javascript/examples/polygon-arrays to draw simple polygons and have them click-able.
However, I don't know how to make the polygons created by the kml file click-able. The polygons on the kml are quite complex shapes and consist of many coordinates to form the polygons. The example below is just for 1 real estate boundary:
-83.6530304633209,34.8237504877659,0 -83.65536046332301,34.8248804877671,0 -83.65672046332431,34.8262904877683,0 -83.6567504633242,34.8271904877693,0 -83.655330463323,34.8308304877725,0 -83.6565104633242,34.8333304877749,0 -83.65765046332511,34.8349204877764,0 -83.6571104633247,34.8383604877794,0 -83.6591604633265,34.8443604877853,0 -83.6588104633263,34.8468904877875,0 -83.6591604633265,34.8507504877912,0 -83.6583904633258,34.8543804877945,0 -83.6569404633244,34.8566604877968,0 -83.65475046332242,34.8599504877998,0 -83.6545604633223,34.8610404878007,0 -83.6543204633219,34.8635704878032,0 -83.65568046332331,34.8684104878075,0 -83.6553904633231,34.8695004878086,0 -83.6546604633224,34.8706904878097,0 -83.654380463322,34.872050487811,0 -83.6552304633228,34.8745504878134,0 -83.65494046332262,34.8759104878145,0 -83.65377046332161,34.8768304878154,0 -83.6504704633185,34.8796104878179,0 -83.64877046331689,34.8814504878196,0 -83.6469204633151,34.8849204878229,0 -83.6450204633134,34.8870304878249,0 -83.64227046331081,34.8897904878275,0 -83.6389204633076,34.8911304878288,0 -83.6344604633034,34.8921304878297,0 -83.6330604633022,34.8926104878301,0 -83.6295204632988,34.8948504878322,0 -83.6278404632974,34.8969604878341,0 -83.6273304632969,34.89832048783551,0 -83.62726046329681,34.8994904878366,0 -83.6286904632982,34.9030704878399,0 -83.6287304632981,34.9045104878412,0 -83.62844046329791,34.9056004878421,0 -83.6268704632964,34.9077104878443,0 -83.6256904632953,34.9086304878451,0 -83.6240704632939,34.9091204878455,0 -83.6226304632926,34.9088804878452,0 -83.6204304632904,34.9083904878448,0 -83.6179704632882,34.9100604878463,0 -83.61680046328711,34.9109904878471,0 -83.6157204632862,34.9116404878477,0 -83.61126046328189,34.9123704878484,0 -83.610200463281,34.91347048784951,0
These coordinates do not work when i manually convert them into latlng pairs and insert them into the Google tutorial above like so:
new google.maps.LatLng(-83.6530304633209,34.8237504877659),
new google.maps.LatLng(83.65536046332301,34.8248804877671),
new google.maps.LatLng(-83.65672046332431,34.8262904877683),
new google.maps.LatLng(-83.6567504633242,34.8271904877693)
Anyone have any ideas on how I can either make the kml layer polygons click-able or use the kml data to redraw the polygons and make them click-able?
Thanks
edit: This is the code i'm using to load the kml:
<!-- Declare the application as HTML5 using the <!DOCTYPE html> declaration -->
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<!-- include the Maps API JavaScript using a script tag -->
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?key=AIzaSyAaWOu7N4OX8BlYUwZhvWP2V0P6YQryN9Y&sensor=true"></script>
<script type="text/javascript">
function initialize()
{
<!-- create a JavaScript object literal to hold a number of map properties -->
var myOptions =
{
center: new google.maps.LatLng(-34.397, 150.644),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP,
fillColor: '#0000ff'
};
<!-- a JavaScript function to create a "map" object -->
var map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);
var myLayer = new google.maps.KmlLayer('http://www.domain.com/gmaps/1.kml',{suppressInfoWindows: true,map: map});
google.maps.event.addListener
(
myLayer,"mouseover",function()
{
this.setOptions({fillColor: "#000000"});
}
);
google.maps.event.addListener
(
myLayer, 'click', function(kmlEvent)
{
var text = kmlEvent.featureData.description;
showInContentWindow(text);
}
);
google.maps.event.addListener
(
myLayer,"mouseover",function()
{
this.setOptions
(
{
fillColor: "#000000"
}
);
}
);
function showInContentWindow(text)
{
var sidediv = document.getElementById('content_window');
sidediv.innerHTML = text;
}
}
</script>
</head>
<!-- initialize the map object from the body tag's onload event -->
<body onLoad="initialize()">
<!-- create a div element named "map_canvas" to hold the Map -->
<div id="map_canvas" style="width:79%; height:100%; float:left"></div>
<div id="content_window" style="width:19%; height:100%; float:left"></div>
</body>
</html>
Unfortunately, you don't get a mouseover event with the KmlLayerapi-doc; check at the api-doc, scroll down a bit to see the Events, and all you get for events are: click, defaultviewport_changed, and status_changed. I have also explored the options that are available because the KmlLayer is an MVCObjectapi-doc, but that doesn't offer additional events. I don't think this is possible.
There may be another way to achieve what you want, but I haven't found it; let's see what others may be able to add.
Using KmlLayer, you can't change the properties of the Polygons. If you use a third party KML parser like geoxml3 or geoxml-v3 to render the polygons as native Google Maps API v3 objects you can change their properties (but whether the performance is acceptable will depend on how complex your KML is). You can also dynamically change Polygons in tiles rendered using FusionTablesLayer (import your KML into a Fusion Tabel).
Example changing the color of Polygons from KML rendered using geoxml3 on mouseover