You can create a new canvas element with document.createElement: var canvas = document.createElement(‘canvas’); and then get the context from it. Just make sure you set the width and height. You don’t have to add the canvas to the tree in order to make it work: DEMO But you definitely have to create that node. You … Read more
Cause The problem is that seeking video (by setting it’s currentTime) is asynchronous. You need to listen to the seeked event or else it will risk take the actual current frame which is likely your old value. As it is asynchronous you must not use the setInterval() as it is asynchronous too and you will … Read more
I have copied the relevant code below from This page. Hope this might help you. $.ajax({ xhr: function() { var xhr = new window.XMLHttpRequest(); //Upload progress xhr.upload.addEventListener(“progress”, function(evt) { if (evt.lengthComputable) { var percentComplete = evt.loaded / evt.total; //Do something with upload progress console.log(percentComplete); } }, false); //Download progress xhr.addEventListener(“progress”, function(evt) { if (evt.lengthComputable) { … Read more
Preprocessing the image is vital Whether done manually by you, or on the fly somehow through a GD library, you absolutely at the least need to take the image you state you are receiving… …and crop and tighten it to make it clean like this (with no white space around the edges and the notch/cut … Read more
There is a 3D context for canvas, but it is not called “3d”, but WebGL (“webgl”).
Canvas calculates from the half of a pixel ctx.moveTo(50,150.5); ctx.lineTo(150,150.5); So starting at a half will fix it Fixed version: http://jsfiddle.net/9bMPD/357/ This answer explains why it works that way.
canvas = document.createElement(‘canvas’); canvasContext = canvas.getContext(‘2d’); canvasContext.translate(width, 0); canvasContext.scale(-1, 1); canvasContext.drawImage(image, 0, 0); Here’s a snippet from a sprite object being used for testing and it produces the results you seem to expect. Here’s another site with more details. http://andrew.hedges.name/widgets/dev/
To turn off for a specific chart instead of in global defaults use this in the options object. Using v2.5.0 options: { tooltips: { enabled: false } }
You can accomplish this by using @ViewChild In your class do the following. import { Component, ViewChild, ElementRef, AfterViewInit } from ‘@angular/core’; @Component({ name: ‘my-component’, // notice the variable name myCanvas template: `<canvas #myCanvas></canvas>` }) export class myComponent implements AfterViewInit { // its important myCanvas matches the variable name in the template @ViewChild(‘myCanvas’) canvas: ElementRef<HTMLCanvasElement>; … Read more
Theres a few ways you can do this. You can either add a background to the canvas you are currently working on, which if the canvas isn’t going to be redrawn every loop is fine. Otherwise you can make a second canvas underneath your main canvas and draw the background to it. The final way … Read more