Questions tagged [canvas]

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tkinter canvas repeats creating new frame

in my Tkinter GUI widget, the submit button commands to draw a plot on a designated frame (plotframe). Initially, the canvas code, and the navigation toolbar work. However, every time I press the ...
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12 views

SnagIt 2019 - Edit transparent head-shot to fit

I have a head-shot with a transparent background, but the head is in the lower right of an image. I want the entire image to be a small square around the head. If I drag the upper-left circle down ...
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38 views

Which Macmillan Learning Test Generator export format can be imported to the Canvas LMS?

Macmillan Learning allows the export of their question banks in the following formats: Cognero XML Word Document Angel 7.1 + Blackboard 7.1 + Respondus 3.5 + QTI Standard QTI 1.2 QTI 2.1 My ...
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46 views

HTML Canvas performance difference between Linux and Windows

We made some measurements of HTML 5 Canvas drawing performance using http://www.kevs3d.co.uk/dev/canvasmark/ and we noticed that we got a much higher performance out of Linux than Windows: ╔══════════...
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1answer
2k views

How can I block HTML Canvas fingerprinting in Firefox via permissions?

I ran a Canvas fingerprinting browser test and noticed that I am susceptible to Canvas fingerprinting in Firefox 66. This was a surprise to me, as I had read several announcements declaring that ...
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381 views

Can't install Canvas 1.6.13 due to missing Windows 8.1 SDK

I'm trying to install Canvas in order to install chartjs-node, but whenever I try, I get this error: C:\Users\Mark\Desktop\Bot>npm install canvas@1.6.13 > canvas@1.6.13 install C:\Users\Mark\...
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1answer
426 views

Tor Browser: How to disable NAG “…attempted to extract HTML5 canvas…”

Constant Nag: "this website (...) attempted to extract HTML5 canvas image data, which may be used to uniquely identify your computer." There's an option to "remember for this site," which has NEVER ...
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1answer
306 views

Reset remembered firefox canvas decisions

Firefox 58 introduced a new feature, asking the user if we wants to allow HTML5 canvas image data for a website: Will you allow [website] to use your HTML5 canvas image data? This may be used to ...
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1answer
613 views

Chrome displays blank canvas, but displays fine on zoom in/out

In my single page (HTML/JS) app, the first screen is loaded using iframe. The contents of the iframe is a HTML page with canvas. The first time it loads in Chrome, the screen is blank. If I zoom in (...
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656 views

Drawing canvas size in Word 2010

I frequently use the drawing canvas to insert and group figures and text. However, the page size and its margins, size of inserted figures, and figure position change according to type of manual I ...
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366 views

Canvas profiler for updated chrome

Why has chrome removed canvas inspection from developer options? In case I need to trace canvas rendering for each frame, what is the tool/extension that I can use for current version of chrome(mine ...
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2answers
223 views

Photoshop Selection and canvas bugs

Since I upgraded to the new Photoshop CC 2015 I've been having some problems with the selection tool. When making a selection I often get double lines, lines stay after deselection and one selection ...
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1answer
240 views

Adobe Flash Canvas updated images keep exporting as the old image anyway

Is there some hidden image caching in Flash HTML5 Canvas? I updated an image in the library, the updated image showed on the stage. I deleted the old image from the asset folder it was imported from, ...
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1answer
216 views

Automatic sequential filenames for Omnigraffle canvases

Is there a way to automatically name the canvas in Omnigraffle sequentially based on their position? Any applescript or plugin? Such as idea 1, idea 2, idea 3, etc. And if I move it, it'll use new ...
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62 views

firefox 15 not saving canvas in html when using save as webpage

I wanted to save a webpage in which there are pie charts generated using canvas. When i opened the saved file i could not find the pie chart. How to enable firefox to include canvas in the output? ...
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1answer
7k views

How can I fix my Chrome HTML5 canvas?

I've noticed that my Chrome canvas doesn't work properly. For example, if I try to update this W3 school canvas sample (even without changing anything), it no longer renders properly (the red ball ...