Category Archives: Writings

HTML5 Canvas: Smooth, variable width lines with transparency.

When making a drawing app with HTML5 canvas, you might come up against the problem of making a smooth, variable width line. Eventually you might find that you can make several calls to ctx.quadraticCurveTo(x,y,xc,yc) and get some kind of effect. … Continue reading

Posted in Computer Science, HTML5, HTML5 Canvas, Javascript Tutorials, Tips and Tricks, Topics, Tutorials, Web Design | Tagged , , , , , , | 2 Comments

Qt C++: Threaded Communication with Artema Hybrid on Linux

Communicating with an Artema Hybrid CC Payment device is actually deceptively simple. I’ve written an application what uses a webkit widget exclusively for the UI display, and so I hook into the Javascript to provide some extra functionality to the … Continue reading

Posted in c/C++, C/C++ Programming, Computer Science, Javascript Tutorials, Linux, OOP, Qt, Tips and Tricks, Topics, Tutorials | Tagged , , , , | Leave a comment