I am trying to bind a camera feed to a video element using Vue 3, but I can not seem to even get a basic example working. Can someone tell me what I am missing?
import { ref, reactive } from 'vue'
let stream: any = reactive({})
let constraints = {
audio: false,
video: {
width: { min: 1024, ideal: 1280, max: 1920 },
height: { min: 576, ideal: 720, max: 1080 },
facingMode: 'environment'
}
}
stream = await navigator.mediaDevices.getUserMedia(constraints)
Then in my template I have tried both of the following ways to bind
<video :srcObject.prop="stream" width="300" height="200" autoplay></video>
<video :srcObject.prope.camel="stream" autoplay playsinline></video>
Your code overwrites stream with the result of getUserMedia(), which effectively removes the original reactive() instance from the component's context.
Solution
Make stream a ref instead of reactive, and set its value property to the result of getUserMedia().
Also, to ensure the user's resources are activated only when necessary, call getUserMedia() in the component's mounted hook, and stop the stream in the beforeUnmount hook.
<script setup>
import { ref, onMounted, onBeforeUnmount } from 'vue'
const stream = ref(null)
const constraints = {
audio: false,
video: {
width: { min: 1024, ideal: 1280, max: 1920 },
height: { min: 576, ideal: 720, max: 1080 },
facingMode: 'environment',
},
}
onMounted(async () => {
stream.value = await navigator.mediaDevices.getUserMedia(constraints)
})
onBeforeUnmount(() => {
stream.value.getTracks().forEach(track => track.stop())
})
</script>
<template>
<video :srcObject="stream" width="300" height="200" autoplay></video>
</template>
demo
Currently I'm using Vue-Konva.js to help me build a 2d editor for panorama.
Does konva.js support GLSL code for apply image effect (ex: stereographic projection)?
Maybe like this format.
KonvaScens.vue
<template>
<v-stage :config="configKonva">
<v-layer>
<v-image :config="configImage"></v-image>
</v-layer>
</v-stage>
</template>
<script>
import {myVertexShader, myFragmentShader} from 'imageShader'
export default {
data () {
return {
testImg: new Image(100, 100),
configKonva: {
width: 500,
height: 500
}
}
},
computed: {
configImage () {
return {
x: 20,
y: 20,
image: this.testImg,
width: 500,
height: 500,
vertexShader: myVertexShader,
fragmentShader: myFragmentShader
}
}
},
mounted () {
this.testImg.src = "https://konvajs.github.io/assets/lion.png"
}
}
</script>
No, vue-konva doesn't support GLSL. GLSL can be used in webgl canvas context. But Konva uses only 2d context.
I’ve created a graph with echarts and want to include it to a pdf by using jspdf. I found that one way to do so might be to use canvas, transfer the graph to an image and finally include the image to the pdf. However, I fail to transfer the graph to an image. Here comes the code:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<title>Balken</title>
<script src="echarts.js"></script>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.3.4/jspdf.debug.js"></script>
<div id="body">
<div id="chart"></div>
</div>
<!-- prepare a DOM container with width and height -->
<div id="main" style="width: 750px; height: 500px"></div>
<script type="text/javascript">
// based on prepared DOM, initialize echarts instance
var myChart = echarts.init(document.getElementById('main'));
// specify chart configuration item and data
var option = {
color: ['#3398DB'],
tooltip: {
trigger: 'axis',
axisPointer: {
type: 'shadow'
}
},
grid: {
left: '3%',
right: '4%',
bottom: '3%',
containLabel: true
},
xAxis: [
{
type: 'category',
data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
axisTick: {
alignWithLabel: true
}
}
],
yAxis: [
{
type: 'value'
}
],
series: [
{
name: 'Salami',
type: 'bar',
barWidth: '60%',
data: [10, 52, 200, 334, 390, 330, 220]
}
]
};
// use configuration item and data specified to show chart
myChart.setOption(option);
var canvas = document.getElementById('main');
var dataURL = canvas.toDataURL();
//console.log(dataURL);
$('#exportButton').click(function () {
var pdf = new jsPDF();
pdf.addImage(dataURL, 'JPEG', 0, 0);
pdf.save('download.pdf');
});
</script>
<button id="exportButton" type="button">Export as PDF</button>
</body>
</html>
Any suggestions?
I needed this as well for a commercial product, so I did not give up until I found the solution.
You cannot use the ID of the chart to get the URL for the image, instead you need to search for the canvas.
($('canvas')[0]).toDataURL("image/png");
Notice the "[0]" means it will give your the first canvas, if you have more charts just do:
($('canvas')[0]).toDataURL("image/png");
($('canvas')[1]).toDataURL("image/png");
($('canvas')[2]).toDataURL("image/png");
3 Hours of searching and testing well spent :)
Enjoy!
I would use the toolbox, save as image:
.....
toolbox: {
feature: {
saveAsImage : {show: true}
}
}
.....
This option, among all the existing ones, will show you an icon to save the graphic as an image.
Quedaria así:
enter image description here
For more options with toolbox: http://echarts.baidu.com/echarts2/doc/option-en.html#title~toolbox
I hope it helps you.
You have to import "html2canvas" in order to make this work.
Html2canvas library will get the snapshot and that image should be written to the pdf with jspdf.
I have created a pen for this.
$("#exportButton").click(function(){
html2canvas($("#main"), {
onrendered: function(canvas) {
var dataURL=canvas.toDataURL('image/jpeg');
var pdf = new jsPDF();
pdf.addImage(dataURL, 'JPEG', 0, 0);
pdf.save("download.pdf");
}
});
});
Echart code:
<ReactEcharts
ref={(e) => {
this.echarts_react = e;
}}
option={option}
notMerge
lazyUpdate
/>
Function:
saveAsImage = (uri, name = 'undefine.jpeg') => {
var link = document.createElement('a');
link.download = name;
link.href = uri;
document.body.appendChild(link);
link.click();
};
saveAsPDF = (uri, name = 'undefine.pdf') => {
let height = echartsInstance.getHeight();
let width = echartsInstance.getWidth();
var doc = '';
if (width > height) {
doc = new jsPDF('l', 'mm', [width, height]);
} else {
doc = new jsPDF('p', 'mm', [height, width]);
}
doc.addImage(echartsInstance.getDataURL({ backgroundColor: '#fff' }), 'JPEG', 10, 10);
doc.save(name);
};
function call:
<li className="nav-item inline dropdown">
<span className="nav-link" data-toggle="dropdown">
<i className="fa fa-download" />
</span>
<div className="dropdown-menu dropdown-menu-scale pull-right">
<span
className="dropdown-item"
onClick={() =>
this.saveAsImage(this.echarts_react.getEchartsInstance().getDataURL({ backgroundColor: '#fff' }))
}>
Save as Image
</span>
<span
className="dropdown-item"
onClick={() =>
this.saveAsPDF(this.echarts_react.getEchartsInstance().getDataURL({ backgroundColor: '#fff' }))
}>
Save as PDF
</span>
</div>
</li>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.2.61/jspdf.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.5.0-beta1/html2canvas.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.5.0-beta1/html2canvas.svg.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/amstockchart/3.13.0/exporting/rgbcolor.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/canvg/1.5/canvg.min.js"></script>
<script type="text/javascript">
// $("#list1").on("click",function(){
$("#list1").click(function(){
$("#row").html(option);
var imgData;
var svgElements = $("#row").find('svg');
//replace all svgs with a temp canvas
svgElements.each(function() {
var canvas, xml;
// canvg doesn't cope very well with em font sizes so find the calculated size in pixels and replace it in the element.
$.each($(this).find('[style*=em]'), function(index, el) {
$(this).css('font-size', getStyle(el, 'font-size'));
});
canvas = document.createElement("canvas");
canvas.className = "screenShotTempCanvas";
//convert SVG into a XML string
xml = (new XMLSerializer()).serializeToString(this);
// Removing the name space as IE throws an error
xml = xml.replace(/xmlns=\"http:\/\/www\.w3\.org\/2000\/svg\"/, '');
//draw the SVG onto a canvas
canvg(canvas, xml);
$(canvas).insertAfter(this);
//hide the SVG element
////this.className = "tempHide";
$(this).attr('class', 'tempHide');
$(this).hide();
});
/* html2canvas($("#row"), {
onrendered: function(canvas) {
var imgData = canvas.toDataURL(
'image/png');
var doc = new jsPDF('p', 'mm');
doc.addImage(imgData, 'PNG', 10, 10);
doc.save('sample-file.pdf');
}
});*/
var imgData;
html2canvas($("#row"), {
useCORS: true,
'allowTaint': true,
onrendered: function (canvas) {
imgData = canvas.toDataURL(
'image/jpeg', 1.0);
canvaswidth1=canvas.width/2;
canvasheight1=canvas.height/4;
currentHeight = $("#row").height();
currentHeight2=currentHeight/2;
var imgWidth = 200;
var pageHeight = 260;
var imgHeight = canvas.height * imgWidth / canvas.width;
var heightLeft = imgHeight;
var doc = new jsPDF('p', 'm`enter code here`m','a4');
var position = 35;
doc.setFillColor(52,73,94);
doc.rect(5, 5, 200, 25, "F");
doc.setFontSize(40);
doc.setTextColor(255, 255, 255);
doc.text(80, 23, "Fitview");
doc.addImage(imgData, 'JPEG', 5, position, imgWidth, imgHeight);
heightLeft -= pageHeight;
while (heightLeft >= 0) {
position = heightLeft - imgHeight;
doc.addPage();
doc.addImage(imgData, 'JPEG', 5, position, imgWidth, imgHeight);
heightLeft -= pageHeight;
}
doc.save('healthcheck_Rapportage.pdf');
location.reload();
}
});
$("#row").find('.screenShotTempCanvas').remove();
$("#row").find('.tempHide').show().removeClass('tempHide');
});
</script>
I made a video gallery with magnific popup.
But unlike the imagegallery, the videogallery doesn't show a counter e.g. 1/3 at the bottom right of the video. Why not? In the imagegallery it works well.
Code of the Videogallery:
$('.gallery_video').each(function() { // the containers for all your galleries
$(this).magnificPopup({
delegate: 'a', // the selector for gallery item
disableOn: 700,
type: 'iframe',
mainClass: 'mfp-fade',
removalDelay: 160,
preloader: true,
fixedContentPos: false,
gallery: {
enabled:true
},
callbacks: {
lazyLoad: function(item) {
console.log(item); // Magnific Popup data object that should be loaded
}
}
});
});
Code of imagegallery:
$('.image-popup-no-margins').magnificPopup({
type: 'image',
closeOnContentClick: true,
closeBtnInside: true,
fixedContentPos: true,
mainClass: 'mfp-no-margins mfp-with-zoom', // class to remove default margin from left and right side
image: {
verticalFit: true
},
zoom: {
enabled: true,
duration: 300 // don't foget to change the duration also in CSS
},
callbacks: {
lazyLoad: function(item) {
console.log(item); // Magnific Popup data object that should be loaded
}
}
});
Both scripts don't specify a counter so why isn't it showing up on both?
thank you
It has been a time ago when this was asked but a full anwser:
You have to add or specify the iframe markup.
You also want to add some small css updates for positioning the counter.
var $attachmentContainers = $('.js-attachments-in-gallery');
$attachmentContainers.magnificPopup({
delegate: 'a',
type: 'image',
gallery:{
enabled:true,
},
iframe: {
markup:
'<div class="mfp-iframe-scaler">'+
'<div class="mfp-close"></div>'+
'<iframe class="mfp-iframe" frameborder="0" allowfullscreen></iframe>'+
'<div class="mfp-bottom-bar">'+
'<div class="mfp-counter"></div>'+
'</div>'+
'</div>'
}
});
.mfp-iframe-scaler .mfp-bottom-bar {
margin-top: 4px; }
Figured it out - for the iframe type you have to specify that you want a counter:
$(this).magnificPopup({
.....
iframe: {
markup: '<button title="Close (Esc)" type="button" class="mfp-close">×</button>'+
'<div class="mfp-counter"></div>'
}
I've been looking through the Fancybox API and the forums here with no luck so far.
Basically when the window is resized the embedded PDF in the fancybox resizes, but the fancybox container does not and bleeds off the right side of the browser.
Heres when it first opens: http://lizbmorrison.net/fancybox1.png
And when the window is resized: http://lizbmorrison.net/fancybox2.png
HTML:
<li class="pdf"><a class="fancypdf" href="#mydoc">View PDF</a></li>
<div id="mydoc" style="display:none;">
<embed class="embed" src="<?php echo wp_get_attachment_url( $PDF->ID ); ?>"></embed>
</div>
JS:
$(document).ready(function() {
var width = $(window).width() * 0.9;
var height = $(window).height() * 0.9;
$('.embed').css('width', width).css('height', height);
$('a.fancypdf').fancybox({
'type': 'inline',
'margin': 0,
'centerOnScroll': false,
'hideOnContentClick': false,
'autoDimensions': true,
'autoScale': true,
'transitionIn': 'fade',
'transitionOut': 'fade',
});
});
$(window).resize(function () {
var width = $(window).width() * 0.9;
var height = $(window).height() * 0.9;
$('.embed').css('width', width).css('height', height);
});
Any ideas?
This is what I've settled on, still not perfect though.
HTML:
<li class="pdf"><a class="fancypdf" style="padding-top: 20px;" href="<?php echo wp_get_attachment_url( $PDF->ID ); ?>">View PDF</a></li>
JS:
$('.fancypdf').fancybox({
'type': 'iframe',
'centerOnScroll': true,
'width': 800,
'height': 600,
'margin': 20,
'autoScale': false,
'autoDimensions': false
});