I am trying to print charts (JSChart) in a pdf using jsPDF. It seems like the chart image is created while the chart is not rendered completely (the data points are still on the bottom of the chart).
var ssvCanvas = document.querySelector('#line-chart-ssv');
var ssvCanvasImg = ssvCanvas.toDataURL("image/png", 1.0);
var doc = new jsPDF();
var ssvImgProps = doc.getImageProperties(ssvCanvasImg);
var width = doc.internal.pageSize.getWidth()-20;
var ssvHeight = (ssvImgProps.height * width) / ssvImgProps.width;
doc.addImage(ssvCanvasImg, 'JPEG', 10, 40, width, ssvHeight );
I have no idea what could help. A wait function wasnt useful as of now.
Can somebody please help?
I'd like to place an image onto an Adobe Illustrator artboard using an image file selected in Finder. Can this be done using JavaScript?
var FINDER = Application("Finder");
FINDER.includeStandardAdditions = true;
var ImageA = FINDER.selection();
doc = app.activeDocument;
var adddoc = app.documents.add( null , 1275.59,898.58);
var placedItem = doc.placedItems.add();
placedItem.file = new File(ImageA);
I used d3 and venn.js for creating this venn diagram.
The code goes here : Svg actually created inside div venn2 by these scripts.
<div id="venn2"></div>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="js/venn.js"></script>
<script>
var sets = [
{sets:["A"], size: 12, label: "A"},
{sets:["B"], size:12, label: "B"},
{sets: ["A", "B"], size: 4, label: "AB"}
];
var chart = venn.VennDiagram()
.wrap(false)
.fontSize("14px")
.width(400)
.height(400);
function updateVenn(sets) {
var div = d3.select("#venn2").datum(sets);
var layout = chart(div),
textCentres = layout.textCentres;
div.selectAll(".label").style("fill", "white");
div.selectAll(".venn-circle path").style("fill-opacity", .6);
return layout;
}
</script>
The script I got here to convert svg to png via canvas.
<canvas id="canvas" ></canvas>
<div id="png-container" ></div>
<script>
var svgString = new XMLSerializer().serializeToString(document.querySelector('svg'));
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
var DOMURL = self.URL || self.webkitURL || self;
var img = new Image();
var svg = new Blob([svgString], {type: "image/svg+xml;charset=utf-8"});
var url = DOMURL.createObjectURL(svg);
img.onload = function() {
ctx.drawImage(img, 0, 0);
var png = canvas.toDataURL("image/png");
document.querySelector('#png-container').innerHTML = '<img src="'+png+'"/>';
DOMURL.revokeObjectURL(png);
};
img.src = url;
</script>
So, the venn diagram as svg was created inside venn2 div by script 1 and svg then written as a png by script 2.
It worked perfectly fine for one svg image per page.
When I have more than one such svg venn diagrams on single html page. Only the first gets converted to png.
But I am unable to fetch the svg at position 2 and 3 or more to convert to png.
I am stuck at this code
var svgString = new XMLSerializer().serializeToString(querySelectorAll('svg'));
where 'svg' means only first svg i guess but not later.
I can't even create svgs with different "id" as svg is formed by d3 and venn.js scripts.
The question is that : How to convert all svg images in a html page
when I don't know their id to png images via above code?
I do not know how to parse this whole string var svgString to convert all to different png images?
In case someone else comes looking for sample code, I figured it out as follows.
My case: I had an svg with two layers drawn by plotly. I was only getting the first layer like the OP. Plotly drew into an element with id="chart". A new canvas already created with id="layer0".
Eventually I needed to send back to PHP as a dataURL so:
var nodes = document.getElementById("chart").querySelectorAll('svg');
for (var i = 0; i < nodes.length; i++) {
result = new XMLSerializer().serializeToString(nodes[i]);
eval('layer'+[i]+'chart').src = 'data:image/svg+xml;base64,' + btoa(result);
}
elem0 = document.getElementById("layer0");
ctx0 = elem0.getContext("2d");
layer0chart.onload = function() {
ctx0.drawImage(layer0chart,0,0,w*1.5,h*1.5);
ctx0.drawImage(layer1chart,0,0,w*1.5,h*1.5);
canvasdata = elem0.toDataURL();
console.log(canvasdata);
}
I appreciate the help from #BioDeveloper and #RobertLongson. The key for me ultimately was to also make sure the toDataURL was being called as an image was being loaded. Cheers.
Has anyone taken the time to extract the timeline widget from the Cesium app? I'm looking to use the timeline widget without the Dojo dependency. I was able to find a teaser saying that it's possible, but the timeline example isn't the easiest to reverse engineer. Does anyone have an idea of how I can extract the necessary libraries and remove the Dojo dependency?
google groups timeline discussion
cesium timeline demo
The timeline itself (outside of that demo app) does not use Dojo. Here's a sample of how this works. You can Run this demo on Sandcastle.
function onTimelineScrubfunction(e) {
var clock = e.clock;
clock.currentTime = e.timeJulian;
clock.shouldAnimate = false;
}
var timeControlsContainer = document.getElementById('timeControlsContainer');
var clock = new Cesium.Clock();
var clockViewModel = new Cesium.ClockViewModel(clock);
var animationContainer = document.createElement('div');
animationContainer.className = 'cesium-viewer-animationContainer';
timeControlsContainer.appendChild(animationContainer);
var animation = new Cesium.Animation(animationContainer, new Cesium.AnimationViewModel(clockViewModel));
var timelineContainer = document.createElement('div');
timelineContainer.className = 'cesium-viewer-timelineContainer';
timeControlsContainer.appendChild(timelineContainer);
var timeline = new Cesium.Timeline(timelineContainer, clock);
timeline.addEventListener('settime', onTimelineScrubfunction, false);
timeline.zoomTo(clock.startTime, clock.stopTime);
clockViewModel.shouldAnimate = true;
window.setInterval(function() {
clock.tick();
}, 32);
I am using Highcharts in my application (without any internet connection)
I have multiple charts on a html page, and I want to generate a PDF report that contains all the charts from this page.
How can I do this without sending the data to any server on the internet ?
I will be thankful for any help or any example you can provide.
Thank you in advance :)
Yes this is possible but involves a few different libraries to get working. The first Library is jsPDF which allows the creation of PDF in the browser. The second is canvg which allows for the rendering and parsing of SVG's, the bit that is really cool though is it can render an svg on to canvas element. Lastly is Highcharts export module which will allow us to send the svg to the canvg to turn into a data URL which can then be given to jsPDF to turn into your pdf.
Here is an example http://fiddle.jshell.net/leighking2/dct9tfvn/ you can also see in there source files you will need to include in your project.
So to start highcharts provides an example of using canvg with it's export to save a chart as a png. because you want all the iamges in a pdf this has been slightly altered for our purpose to just return the data url
// create canvas function from highcharts example http://jsfiddle.net/highcharts/PDnmQ/
(function (H) {
H.Chart.prototype.createCanvas = function (divId) {
var svg = this.getSVG(),
width = parseInt(svg.match(/width="([0-9]+)"/)[1]),
height = parseInt(svg.match(/height="([0-9]+)"/)[1]),
canvas = document.createElement('canvas');
canvas.setAttribute('width', width);
canvas.setAttribute('height', height);
if (canvas.getContext && canvas.getContext('2d')) {
canvg(canvas, svg);
return canvas.toDataURL("image/jpeg");
}
else {
alert("Your browser doesn't support this feature, please use a modern browser");
return false;
}
}
}(Highcharts));
Then for the example i have set up export on a button click. This will look for all elements of a certain class (so choose one to add to all of your chart elements) and then call their highcharts.createCanvas function.
$('#export_all').click(function () {
var doc = new jsPDF();
// chart height defined here so each chart can be palced
// in a different position
var chartHeight = 80;
// All units are in the set measurement for the document
// This can be changed to "pt" (points), "mm" (Default), "cm", "in"
doc.setFontSize(40);
doc.text(35, 25, "My Exported Charts");
//loop through each chart
$('.myChart').each(function (index) {
var imageData = $(this).highcharts().createCanvas();
// add image to doc, if you have lots of charts,
// you will need to check if you have gone bigger
// than a page and do doc.addPage() before adding
// another image.
/**
* addImage(imagedata, type, x, y, width, height)
*/
doc.addImage(imageData, 'JPEG', 45, (index * chartHeight) + 40, 120, chartHeight);
});
//save with name
doc.save('demo.pdf');
});
important to note here that if you have lots of charts you will need to handle placing them on a new page. The documentation for jsPDF looks really outdated (they do have a good demos page though just not a lot to explain all the options possible), there is an addPage() function and then you can just play with widths and heights until you find something that works.
the last part is to just setup the graphs with an extra option to not display the export button on each graph that would normally display.
//charts
$('#chart1').highcharts({
navigation: {
buttonOptions: {
enabled: false
}
},
//this is just normal highcharts setup form here for two graphs see fiddle for full details
The result isn't too bad i'm impressed with the quality of the graphs as I wasn't expecting much from this, with some playing of the pdf positions and sizes could look really good.
Here is a screen shot showing the network requests made before and after the export, when the export is made no requests are made http://i.imgur.com/ppML6Gk.jpg
here is an example of what the pdf looks like http://i.imgur.com/6fQxLZf.png (looks better when view as actual pdf)
quick example to be tried on local https://github.com/leighquince/HighChartLocalExport
You need to setup your own exporting server, locally like in the article
Here is an example using the library pdfmake:
html:
<div id="chart_exchange" style="width: 450px; height: 400px; margin: 0 auto"></div>
<button id="export">export</button>
<canvas id="chart_exchange_canvas" width="450" height="400" style="display: none;"></canvas>
javascript:
function drawInlineSVG(svgElement, canvas_id, callback) {
var can = document.getElementById(canvas_id);
var ctx = can.getContext('2d');
var img = new Image();
img.setAttribute('src', 'data:image/svg+xml;base64,' + btoa(unescape(encodeURIComponent(svgElement))));
img.onload = function() {
ctx.drawImage(img, 0, 0);
callback(can.toDataURL("image/png"));
}
}
full working code:
https://jsfiddle.net/dimitrisscript/f6sbdsps/
Maybe this link can help you out.
http://bit.ly/1IYJIyF
Try refer to the exporting properties (fallbackToExportServer: false) and the necessary file that need to be include (offline-exporting.js).
Whereas for the export all at once part, currently I myself also still trying. Will update here if any.
This question is a bit old but was something i was working on myself recently and had some trouble with it.
I used the jsPDF library: https://github.com/MrRio/jsPDF
Issues i ran into involved jsPDF not supporting the SVG image exported by the high chart + images being blurry and low quality.
Below is the solution I used to get two charts into one pdf document:
function createPDF() {
var doc = new jsPDF('p', 'pt', 'a4'); //Create pdf
if ($('#chart1').length > 0) {
var chartSVG = $('#chart1').highcharts().getSVG();
var chartImg = new Image();
chartImg.onload = function () {
var w = 762;
var h = 600;
var chartCanvas = document.createElement('canvas');
chartCanvas.width = w * 2;
chartCanvas.height = h * 2;
chartCanvas.style.width = w + 'px';
chartCanvas.style.height = h + 'px';
var context = chartCanvas.getContext('2d');
chartCanvas.webkitImageSmoothingEnabled = true;
chartCanvas.mozImageSmoothingEnabled = true;
chartCanvas.imageSmoothingEnabled = true;
chartCanvas.imageSmoothingQuality = "high";
context.scale(2, 2);
chartCanvas.getContext('2d').drawImage(chartImg, 0, 0, 762, 600);
var chartImgData = chartCanvas.toDataURL("image/png");
doc.addImage(chartImgData, 'png', 40, 260, 250, 275);
if ($('#chart2').length > 0) {
var chart2SVG = $('#chart2').highcharts().getSVG(),
chart2Img = new Image();
chart2Img.onload = function () {
var chart2Canvas = document.createElement('canvas');
chart2Canvas.width = w * 2;
chart2Canvas.height = h * 2;
chart2Canvas.style.width = w + 'px';
chart2Canvas.style.height = h + 'px';
var context = chart2Canvas.getContext('2d');
chart2Canvas.webkitImageSmoothingEnabled = true;
chart2Canvas.mozImageSmoothingEnabled = true;
chart2Canvas.imageSmoothingEnabled = true;
chart2Canvas.imageSmoothingQuality = "high";
context.scale(2, 2);
chart2Canvas.getContext('2d').drawImage(chart2Img, 0, 0, 762, 600);
var chart2ImgData = chart2Canvas.toDataURL("image/png");
doc.addImage(chart2ImgData, 'PNG', 300, 260, 250, 275);
doc.save('ChartReport.pdf');
}
chart2Img.src = "data:image/svg+xml;base64," + window.btoa(unescape(encodeURIComponent(chart2SVG)));
}
}
chartImg.src = "data:image/svg+xml;base64," + window.btoa(unescape(encodeURIComponent(chartSVG)));
}
}
scripts to include:
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.2.61/jspdf.min.js"></script>