javascript Programming Glossary: ctx

How can you find the height of text on an HTML canvas?

http://stackoverflow.com/questions/1134586/how-can-you-find-the-height-of-text-on-an-html-canvas

that you would want to remove function measureTextHeight ctx left top width height Draw the text in the specified area ctx.save.. left top width height Draw the text in the specified area ctx.save ctx.translate left top Math.round height 0.8 ctx.mozDrawText.. width height Draw the text in the specified area ctx.save ctx.translate left top Math.round height 0.8 ctx.mozDrawText 'gM'..

jQuery Mobile: Markup Enhancement of dynamically added content

http://stackoverflow.com/questions/14550396/jquery-mobile-markup-enhancement-of-dynamically-added-content

if this.is 'input' this.val newText go up the tree var ctx this.closest '.ui btn' 'span.ui btn text' ctx .text newText.. tree var ctx this.closest '.ui btn' 'span.ui btn text' ctx .text newText return jQuery Working example http jsfiddle.net..

How to draw an oval in html5 canvas?

http://stackoverflow.com/questions/2172798/how-to-draw-an-oval-in-html5-canvas

to draw new shapes without scaling. Thanks to Jani ctx.save ctx.scale 0.75 1 ctx.beginPath ctx.arc 20 21 10 0 Math.PI.. draw new shapes without scaling. Thanks to Jani ctx.save ctx.scale 0.75 1 ctx.beginPath ctx.arc 20 21 10 0 Math.PI 2 false.. without scaling. Thanks to Jani ctx.save ctx.scale 0.75 1 ctx.beginPath ctx.arc 20 21 10 0 Math.PI 2 false ctx.stroke ctx.closePath..

Resizing an image in an HTML5 canvas

http://stackoverflow.com/questions/2303690/resizing-an-image-in-an-html5-canvas

code reader.onloadend function e var img new Image var ctx canvas.getContext 2d var canvasCopy document.createElement canvas.. img.width ratio canvas.height img.height ratio ctx.drawImage canvasCopy 0 0 canvasCopy.width canvasCopy.height.. elem.height img.height elem.style.display none this.ctx elem.getContext 2d this.ctx.drawImage img 0 0 this.img img this.src..

Why does canvas.toDataURL() throw a security exception?

http://stackoverflow.com/questions/2390232/why-does-canvas-todataurl-throw-a-security-exception

viewer frame.width 100 frame.height 100 var ctx frame.getContext 2d var img new Image img.src http www.ansearch.com.. item small image.png img.onload function draw image ctx.drawImage img 0 0 Here's where the error happens window.open..

Is there a way to curve / arc text using CSS3 / Canvas

http://stackoverflow.com/questions/2840862/is-there-a-way-to-curve-arc-text-using-css3-canvas

document.getElementById cnv cnv.width 500 cnv.height 300 ctx cnv.getContext 2d ctx.font bold 12px sans serif text abcdefghijklm.. cnv cnv.width 500 cnv.height 300 ctx cnv.getContext 2d ctx.font bold 12px sans serif text abcdefghijklm for i 0 i text.length.. sans serif text abcdefghijklm for i 0 i text.length i ctx.fillText text i 300 100 ctx.rotate 0.1 script body html It..

Use <canvas> as a CSS background

http://stackoverflow.com/questions/3397334/use-canvas-as-a-css-background

script type application x javascript function draw w h var ctx document.getCSSCanvasContext 2d squares w h ctx.fillStyle rgb.. w h var ctx document.getCSSCanvasContext 2d squares w h ctx.fillStyle rgb 200 0 0 ctx.fillRect 10 10 55 50 ctx.fillStyle.. 2d squares w h ctx.fillStyle rgb 200 0 0 ctx.fillRect 10 10 55 50 ctx.fillStyle rgba 0 0 200 0.5 ctx.fillRect..

Detect click on HTML button through javascript in Android WebView

http://stackoverflow.com/questions/4065312/detect-click-on-html-button-through-javascript-in-android-webview

are sort of shadows of the HTML buttons valid new Button ctx valid.setOnClickListener this refuse new Button ctx refuse.setOnClickListener.. Button ctx valid.setOnClickListener this refuse new Button ctx refuse.setOnClickListener this Then I added javascript to my..

Image manipulation and texture mapping using HTML5 Canvas?

http://stackoverflow.com/questions/4774172/image-manipulation-and-texture-mapping-using-html5-canvas

u v are pixel coordinates on texture function textureMap ctx texture pts var tris 0 1 2 2 3 0 Split in two triangles for.. triangle will be affected by the image drawing operation ctx.save ctx.beginPath ctx.moveTo x0 y0 ctx.lineTo x1 y1 ctx.lineTo.. will be affected by the image drawing operation ctx.save ctx.beginPath ctx.moveTo x0 y0 ctx.lineTo x1 y1 ctx.lineTo x2 y2..

Invoke native date picker from web-app on iOS/Android

http://stackoverflow.com/questions/4946919/invoke-native-date-picker-from-web-app-on-ios-android

in the Java code replace final PhonegapActivity currentCtx ctx with final Context currentCtx ctx.getContext and in the JavaScript.. currentCtx ctx with final Context currentCtx ctx.getContext and in the JavaScript file replace PhoneGap with..

Get pixel color from canvas, on mouseover

http://stackoverflow.com/questions/6735470/get-pixel-color-from-canvas-on-mouseover

of this Here's what I have so far script function draw var ctx document.getElementById 'canvas' .getContext '2d' var img new.. var img new Image img.src 'Your URL' img.onload function ctx.drawImage img 0 0 canvas.onmousemove function e var mouseX mouseY.. else if e.layerX mouseX e.layerX mouseY e.layerY var c ctx.getImageData mouseX mouseY 1 1 .data '#ttip' .css 'left' mouseX..

How to change color of an image using jquery [closed]

http://stackoverflow.com/questions/9303757/how-to-change-color-of-an-image-using-jquery

mug var canvas document.createElement canvas var ctx canvas.getContext 2d var originalPixels null var currentPixels.. img canvas.width img.width canvas.height img.height ctx.drawImage img 0 0 img.naturalWidth img.naturalHeight 0 0 img.width.. img.naturalHeight 0 0 img.width img.height originalPixels ctx.getImageData 0 0 img.width img.height currentPixels ctx.getImageData..

Get image data in Javascript?

http://stackoverflow.com/questions/934012/get-image-data-in-javascript

img.height Copy the image contents to the canvas var ctx canvas.getContext 2d ctx.drawImage img 0 0 Get the data URL.. image contents to the canvas var ctx canvas.getContext 2d ctx.drawImage img 0 0 Get the data URL formatted image Firefox supports..