I'm testing out OpenSeadragon to see how it can handle a custom tile source. I've also turned on the navigator. However the thumbnail image does not show up in the navigator. Here is my code:
<!DOCTYPE html>
<html>
<head>
<title>OpenSeaDragon (OSD) Custom Tile Sources Test</title>
</head>
<body>
<div id="custom_tilesource" style="width: 800px; height: 600px;"></div>
<script src="libs/openseadragon/openseadragon.js"></script>
<script type="text/javascript">
var viewer = OpenSeadragon({
showNavigator: true,
navigatorSizeRatio: 0.25,
id: "custom_tilesource",
prefixUrl: "libs/openseadragon/images/",
wrapHorizontal: false,
tileSources: {
height: 9425,
width: 9426,
tileSize: 512,
maxLevel: 14,
minLevel: 10,
getTileUrl: function( level, x, y ){
var strSources = "W3siQXR0cmlidXRlcyI6eyJPcGVyYXRpb24iOiJTdW0ifSwiSWQiOm51bGwsIlR5cGUiOiJJbWFnZSJ9LHsiQXR0cmlidXRlcyI6e30sIklkIjoiMjIwOSIsIlR5cGUiOiJJbWFnZUlkIn1d";
var strSampleRegion = 161;
var handlerURL = "/MultiOmyxU/handler.ashx?X=" + x + "&Y=" + y + "&Level=" + level + "&Sources=" + strSources + "&Reason=SampleRegion=" + strSampleRegion;
return handlerURL;
}
}
});
</script>
</body>
</html>
If anyone has had a similar problem please let me know as I am unsure as how to proceed to fix this issue.
Interesting. I assume it works if you use a DZI instead of a custom tilesource? Are you seeing any errors in the console? Do you have a link you can share?
I recommend posting this to the OpenSeadragon issues:
https://github.com/openseadragon/openseadragon/issues
Someone might be able to help you there.
Related
I'm new to the Raphael, so I'm trying to learn some things through the tutorials that are available.
I'm stuck with a problem, where I simply copy/paste the Source Code from Raphael's site:
http://g.raphaeljs.com/piechart2.html
I right-clicked to see the source code and I copy/pasted in my notepad++. I did add the needed JS and CSS files, everything is the same.
MY CODE:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="demo.css" media="screen">
<link rel="stylesheet" href="demo-print.css" media="print">
<script src="raphael-min.js"></script>
<script src="g.raphael-min.js"></script>
<script src="g.pie-min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<div id="pie"></div>
<script>
<script type="text/javascript">
window.onload = function () {
var r = Raphael("holder"),
pie = r.piechart(320, 240, 100, [55, 20, 13, 32, 5, 1, 2, 10], { legend: ["%%.%% - Enterprise Users", "IE Users"], legendpos: "west", href: ["http://raphaeljs.com", "http://g.raphaeljs.com"]});
r.text(320, 100, "Interactive Pie Chart").attr({ font: "20px sans-serif" });
/*pie.hover(function () {
this.sector.stop();
this.sector.scale(1.1, 1.1, this.cx, this.cy);*/
/*if (this.label) {
this.label[0].stop();
this.label[0].attr({ r: 7.5 });
this.label[1].attr({ "font-weight": 800 });
}
}, function () {
this.sector.animate({ transform: 's1 1 ' + this.cx + ' ' + this.cy }, 500, "bounce");
if (this.label) {
this.label[0].animate({ r: 5 }, 500, "bounce");
this.label[1].attr({ "font-weight": 400 });
}*/
});
};
</script>
</head>
<body class="raphael" id="g.raphael.dmitry.baranovskiy.com">
<div id="holder"></div>
<p>
Pie chart with legend, hyperlinks on two first sectors and hover effect.
</p>
<p>
Demo of gRaphaël JavaScript library.
</p>
</body>
</html>
Ignore the "commented lines", this was me trying to debugg my problem. I get the background, but the chart just won't display.
Any help would be appreciated.
You should check for your browser settings for Active x controls.There might be appearing a prompt message by the browser when you try to load the page.
Something like:-
"To help protect your security,Internet Explorer has restricted this page from running scripts or ActiveX controls that could access your computer.click here for options..."
You need to click on the message & select option- 'Allow Blocked Contents'
As I don't see any problem with your canvas creation or the coordinates.
Give your canvas dimensions.
Instead of:
var r = Raphael("holder"),
Try using:
var r = Raphael("holder", 0, 0, 520, 440),
I'm trying to capture a div into an image using html2canvas
I have read some similar question here like
How to upload a screenshot using html2canvas?
create screenshot of web page using html2canvas (unable to initialize properly)
I have tried the code
canvasRecord = $('#div').html2canvas();
dataURL = canvasRecord.toDataURL("image/png");
and the canvasRecord will be undefined after .html2canvas() called
and also this
$('#div').html2canvas({
onrendered: function (canvas) {
var img = canvas.toDataURL()
window.open(img);
}
});
browser gives some (48 to be exact) similar errors like:
GET http://html2canvas.appspot.com/?url=https%3A%2F%2Fmts1.googleapis.com%2Fvt%…%26z%3D12%26s%3DGalileo%26style%3Dapi%257Csmartmaps&callback=html2canvas_1 404 (Not Found)
BTW, I'm using v0.34 and I have added the reference file html2canvas.min.js and jquery.plugin.html2canvas.js
How can I convert the div into canvas in order to capture the image.
EDIT on 26/Mar/2013
I found Joel's example works.
But unfortunately when Google map embedded in my app, there will be errors.
<html>
<head>
<style type="text/css">
div#testdiv
{
height:200px;
width:200px;
background:#222;
}
div#map_canvas
{
height: 500px;
width: 800px;
position: absolute !important;
left: 500px;
top: 0;
}
</style>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?v=3&sensor=false"></script>
<script type="text/javascript" src="html2canvas.min.js"></script>
<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
<script language="javascript">
$(window).load(function(){
var mapOptions = {
backgroundColor: '#fff',
center: new google.maps.LatLng(1.355, 103.815),
overviewMapControl: true,
overviewMapControlOptions: { opened: false },
mapTypeControl: true,
mapTypeControlOptions: { position: google.maps.ControlPosition.TOP_LEFT, style: google.maps.MapTypeControlStyle.DROPDOWN_MENU },
panControlOptions: { position: google.maps.ControlPosition.RIGHT_CENTER },
zoomControlOptions: { position: google.maps.ControlPosition.RIGHT_CENTER },
streetViewControlOptions: { position: google.maps.ControlPosition.RIGHT_CENTER },
disableDoubleClickZoom: true,
mapTypeId: google.maps.MapTypeId.ROADMAP,
minZoom: 1,
zoom: 12
};
map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
$('#load').click(function(){
html2canvas($('#testdiv'), {
onrendered: function (canvas) {
var img = canvas.toDataURL("image/png")
window.open(img);
}
});
});
});
</script>
</head>
<body>
<div id="testdiv">
</div>
<div id="map_canvas"></div>
<input type="button" value="Save" id="load"/>
</body>
</html>
I ran into the same type of error you described, but mine was due to the dom not being completely ready to go. I tested with both jQuery pulling the div and also getElementById just to make sure there wasn't something strange with the jQuery selector. Below is an example that works in Chrome:
<html>
<head>
<style type="text/css">
div {
height: 50px;
width: 50px;
background-color: #2C7CC3;
}
</style>
<script type="text/javascript" src="html2canvas.js"></script>
<script type="text/javascript" src="jquery-1.9.1.js"></script>
<script language="javascript">
$(document).ready(function() {
//var testdiv = document.getElementById("testdiv");
html2canvas($("#testdiv"), {
onrendered: function(canvas) {
// canvas is the final rendered <canvas> element
var myImage = canvas.toDataURL("image/png");
window.open(myImage);
}
});
});
</script>
</head>
<body>
<div id="testdiv">
</div>
</body>
</html>
If you just want to have screenshot of a div, you can do it like this
html2canvas($('#div'), {
onrendered: function(canvas) {
var img = canvas.toDataURL()
window.open(img);
}
});
you can try this code to capture a div When the div is very wide or offset relative to the screen
var div = $("#div")[0];
var rect = div.getBoundingClientRect();
var canvas = document.createElement("canvas");
canvas.width = rect.width;
canvas.height = rect.height;
var ctx = canvas.getContext("2d");
ctx.translate(-rect.left,-rect.top);
html2canvas(div, {
canvas:canvas,
height:rect.height,
width:rect.width,
onrendered: function(canvas) {
var image = canvas.toDataURL("image/png");
var pHtml = "<img src="+image+" />";
$("#parent").append(pHtml);
}
});
10 2022
This question is quite old, but if anyone looking for a clear solution to implement then here it is. This is using Pure JS with html2canvas and FileSaver
I have tested and it works fine.
Capture everything inside a div.
Step 1
Include the scripts in your footer. jQuery is not needed, These two are fine. If you already have these two in your file, watch out for the correct version. I know it's a little thing, but it is important.
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/1.4.1/html2canvas.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/2.0.0/FileSaver.min.js"></script>
Step 2
Basic div. The style attribute is optional. I am using it here to make it look presentable.
<div id="savethegirl" style="background-color:coral;color:white;padding:10px;width:200px;">
I am a Pretty girl 👩
</div>
<button onclick="myfunc()">Save the girl</button>
It should look like this
Step 3
Include this script
function myfunc(){
// if you are using a different 'id' in the div, make sure you replace it here.
var element = document.getElementById("savethegirl");
html2canvas(element).then(function(canvas) {
canvas.toBlob(function(blob) {
window.saveAs(blob, "Heres the Girl.png");
});
});
};
Step 4
Click the button and it should save the file.
Resources
CDN from: https://cdnjs.com/
This is from Carlos Delgado's article (https://ourcodeworld.com/articles/read/415/how-to-create-a-screenshot-of-your-website-with-javascript-using-html2canvas). I simplified it
If this answer is useful.
Hit that up arrow 🠉 It will help others to find it.
I don't know if the answer will be late, but I have used this form.
JS:
function getPDF() {
html2canvas(document.getElementById("toPDF"),{
onrendered:function(canvas){
var img=canvas.toDataURL("image/png");
var doc = new jsPDF('l', 'cm');
doc.addImage(img,'PNG',2,2);
doc.save('reporte.pdf');
}
});
}
HTML:
<div id="toPDF">
#your content...
</div>
<button id="getPDF" type="button" class="btn btn-info" onclick="getPDF()">
Download PDF
</button>
You can get the screenshot of a division and save it easily just using the below snippet. Here I'm used the entire body, you can choose the specific image/div elements just by putting the id/class names.
html2canvas(document.getElementsByClassName("image-div")[0], {
useCORS: true,
}).then(function (canvas) {
var imageURL = canvas.toDataURL("image/png");
let a = document.createElement("a");
a.href = imageURL;
a.download = imageURL;
a.click();
});
It can be easily done using html2canvas, try out the following,
try adding the div inside a html modal and call the model id using a jquery function. In the function you can specify the size (height, width) of the image to be displayed. Using modal is an easy way to capture a html div into an image in a button onclick.
for example have a look at the code sample,
`
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<div class="modal-body">
<p>Some text in the modal.</p>
`
paste the div, which you want to be displayed, inside the model. Hope it will help.
window.open didn't work for me... just a blank page rendered... but I was able to make the png appear on the page by replacing the src attribute of a pre-existing img element created as the target.
$("#btn_screenshot").click(function(){
element_to_png("container", "testhtmltocanvasimg");
});
function element_to_png(srcElementID, targetIMGid){
console.log("element_to_png called for element id " + srcElementID);
html2canvas($("#"+srcElementID)[0]).then( function (canvas) {
var myImage = canvas.toDataURL("image/png");
$("#"+targetIMGid).attr("src", myImage);
console.log("html2canvas completed. png rendered to " + targetIMGid);
});
}
<div id="testhtmltocanvasdiv" class="mt-3">
<img src="" id="testhtmltocanvasimg">
</div>
I can then right-click on the rendered png and "save as". May be just as easy to use the "snipping tool" to capture the element, but html2canvas is an certainly an interesting bit of code!
You should try this (test, works at least in Firefox):
html2canvas(document.body,{
onrendered:function(canvas){
document.body.appendChild(canvas);
}
});
Im running these lines of code to get the full browser screen (only the visible screen, not the hole site):
var w=window, d=document, e=d.documentElement, g=d.getElementsByTagName('body')[0];
var y=w.innerHeight||e.clientHeight||g.clientHeight;
html2canvas(document.body,{
height:y,
onrendered:function(canvas){
var img = canvas.toDataURL();
}
});
More explanations & options here: http://html2canvas.hertzen.com/#/documentation.html
I am new to Raphael and am trying to do something very simple, but failing miserably.
I am trying to replicate the animation at this link This is the code I have so far:
<html>
<head><title></title>
<script src="raphael-min.js"></script>
<script src=" src="jquery-1.7.2.js"></script>
</head>
<body>
<div id="draw-here-raphael" style="height: 200px; width: 400px; background: #666;">
</div>
<script type="text/javascript">
//all your javascript goes here
var r = new Raphael("draw-here-raphael", 400, 200),
// Store where the box is
position = 'left',
// Make our pink rectangle
rect = r.rect(20, 20, 50, 50).attr({"fill": "#fbb"});
// Note JQuery is adding the mouseover. SVG == html nodes
$(rect.node).mouseover(function () {
if (position === 'left') {
rect.animate({x: 300, y: 100}, 400, "<>");
position = 'right';
} else {
rect.animate({x: 20, y: 20 }, 800, "bounce");
position = 'left';
}
});
// Make that sucker rotate
setInterval(function () {
rect.rotate(1);
}, 10);
</script>
</body>
</html>
I have downloaded jquery and have it in the same folder as the Raphael. The code that isn't working is the commented code talking about jquery adding the mouseover. When I add that code the rectangle doesn't rotate anymore. It is just stationary. If someone can please help me with this animation I would appreciate it.
Thanks
You have an error in your code:
<script src=" src="jquery-1.7.2.js"></script>
Change it to:
<script src="jquery-1.7.2.js"></script>
That should correct your problem with jQuery.
I am trying to use the JS StreetView API to let the user select a view they wish to use for a static StreetView image. I've built a basic test as located on my sandbox instance (and below for future posterity).
When the page first loads, the StreetView view-port loads, and the static image reflecting that view-port loads correctly. If I pan around without my from my position, the static image updates correctly.
I'm using calls made on pov_changed, position_changed, and visible_changed events to invoke the updating of the static image. I put a half a second delay between the firing of these events to not invoke quota errors.
My problem is this:
If I use any of the 'clickToGo' actions to change my location, the location (latitude/longitude) shown in my static StreetView does not correctly reflect the JS StreetView view-port. From what i can see, the pov (fov/zoom, heading, pitch) are all correct, but my location is not.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
function initialize() {
var panorama = new google.maps.StreetViewPanorama(document.getElementById("pano"), {
position: new google.maps.LatLng(42.345573,-71.098326),
pov: {
heading: 34,
pitch: 10,
zoom: 1
}
});
/**
* Build static URL from streetview JS instance settings
*/
function getStaticUrl(secure) {
secure = (secure) ? 's' : '';
var latlng = panorama.getPosition();
var pov = panorama.getPov();
var url = "http" + secure + "://maps.googleapis.com/maps/api/streetview?size=500x400&location=" + encodeURIComponent(latlng.lat() + ", " + latlng.lng()) + "&fov=" + (180 / Math.pow(2, pov.zoom)) + "&heading=" + encodeURI(pov.heading) + "&pitch=" + encodeURI(pov.pitch) + "&sensor=false";
console.log("lat: " + latlng.lat() + " " + "lng: " + latlng.lng());
console.log("img src: " + url);
return url;
}
/**
* To stop overusing quota errors with the static streetview API, wait half a second after streetview has stopped moving to
* update image preview.
*/
var _updateStreetViewWait = 0;
var _handleStreetViewPovChange = function() {
clearTimeout(_updateStreetViewWait);
_updateStreetViewWait = setTimeout(function() {
var linkUrl = getStaticUrl();
$('#link').html("<a target='_blank' href='" + linkUrl + "'><img src='" + linkUrl + "'/></a>");
}, 500);
};
google.maps.event.addListener(panorama, 'pov_changed', _handleStreetViewPovChange);
google.maps.event.addListener(panorama, 'position_changed', _handleStreetViewPovChange);
google.maps.event.addListener(panorama, 'visible_changed', _handleStreetViewPovChange);
}
</script>
</head>
<body onload="initialize()">
<div id="pano" style="width: 500px; height: 400px"></div>
<div id="link" style="width:100%; height: 2%"></div>
</body>
</html>
The two different APIs use different projection systems. The JS API uses different projections depending on the browser, so they're not going to line up
I am trying something fairly simple, you can see a demo here:
http://www.jsfiddle.net/VVe8x/19/
This bug only appears in Firefox, so to see it press either one of the links once (it will take you to either NY or Israel) then press the other link.
The bug is that it will not show me the tiles in that location, instead it will show me the background of the div.
P.S In Chrome this works flawlessly.
I dont know if this is a clue or it might confuse you, if in between pressing either NY or Israel links you press the "view the world" link it will allow you then to see the other location..
Full Source for reference
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<body>
show me NY
show me TLV
show world map(a "workaround"
<div id='myMap' style="height: 600px; width: 600px; position: relative"></div>
<script src="http://openlayers.org/api/OpenLayers.js" type="text/javascript"></script>
<script src="http://developers.cloudmade.com/attachments/download/58/cloudmade.js" type="text/javascript"></script>
<script type="text/javascript" charset="utf-8">
map = new OpenLayers.Map("myMap", {
controls: [
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.PanZoomBar()
]
});
var cloudmade = new OpenLayers.Layer.CloudMade("CloudMade", {
key: 'd5da652e33e6486ba62fca3d18ba70c9'
});
map.addLayer(cloudmade);
var epsg4326 = new OpenLayers.Projection("EPSG:4326");
map.setCenter(new OpenLayers.LonLat(40, 32), 2);
show1 = function(){
var bound1 = new OpenLayers.Bounds(-8236567.917898,4972686.066032,-8236148.409989,4972889.624407);
map.zoomToExtent(bound1); // to NY
};
show2 = function(e){
var bound2 = new OpenLayers.Bounds(3874818.203389,3773932.267033,3875217.305962,3774226.370443);
map.zoomToExtent(bound2); // to Israel
return false;
};
</script>
</body>
</html>
The myMap_OpenLayers_Container has the following CSS when the tiles are invisible:
position: absolute; z-index: 749; left: -2.02815e+7px; top: -2007340px;
If you change these around you can see that the correct tiles were loaded, so its likely to be jsFiddle messing them up. The tiles CSS when they don't show also have strange values.
Update:
Testing locally also produces the issue, so that rules out jsFiddle.
A fix would be to set this value after the zoom by calling a function such as:
updateCSS = function(){
OpenLayers_Container = document.getElementById("myMap_OpenLayers_Container").style.left = "0px";
}
This looks like a bug, although if it is in OpenLayers or the CloudMade layer properties is hard to tell - I'd imagine the latter, or it would be a widely reported bug. The relevant code in OpenLayers.js appears to be:
centerLayerContainer: function(lonlat){
var originPx = this.getViewPortPxFromLonLat(this.layerContainerOrigin);
var newPx = this.getViewPortPxFromLonLat(lonlat);
if ((originPx != null) && (newPx != null)) {
this.layerContainerDiv.style.left = Math.round(originPx.x - newPx.x) + "px";
this.layerContainerDiv.style.top = Math.round(originPx.y - newPx.y) + "px";
}
I was running into this problem too, and it turned out I was not setting the map's center as I thought I was. The problem goes away if you first call map.setCenter(). For example:
var newCenter = new OpenLayers.Lonlat(longitude, latitude)
.transform(new OpenLayers.Projection('ESPG:4326'),
this.map.getProjectionObject());
this.map.setCenter(newCenter);
Hope this helps whoever next has the problem.