Book Image

HTML5 Canvas Cookbook

By : Eric Rowell
Book Image

HTML5 Canvas Cookbook

By: Eric Rowell

Overview of this book

The HTML5 canvas is revolutionizing graphics and visualizations on the Web. Powered by JavaScript, the HTML5 Canvas API enables web developers to create visualizations and animations right in the browser without Flash. Although the HTML5 Canvas is quickly becoming the standard for online graphics and interactivity, many developers fail to exercise all of the features that this powerful technology has to offer.The HTML5 Canvas Cookbook begins by covering the basics of the HTML5 Canvas API and then progresses by providing advanced techniques for handling features not directly supported by the API such as animation and canvas interactivity. It winds up by providing detailed templates for a few of the most common HTML5 canvas applications—data visualization, game development, and 3D modeling. It will acquaint you with interesting topics such as fractals, animation, physics, color models, and matrix mathematics. By the end of this book, you will have a solid understanding of the HTML5 Canvas API and a toolbox of techniques for creating any type of HTML5 Canvas application, limited only by the extent of your imagination.
Table of Contents (19 chapters)
HTML5 Canvas Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Canvas Security
Index

Attaching touch event listeners to regions on a mobile device


For those of you crying "What about mobile devices? Desktops and laptops are a thing of the past!" – this recipe is just for you. As Internet surfers migrate away from their giant tethered desktops and begin consuming Internet content from mobile devices, it's becoming more evident every day that the future of the Web, including canvas, will reside mostly in the mobile space.

Unlike web applications running on desktops and laptops, where user interactions are detected using the mouse from mousedown, mouseup, mouseover, mouseout, and mousemove events, web applications running on mobile devices are interacted with touch events from touchstart, touchend, and touchmove events.

In this recipe, we'll create a mobile version of the previous recipe by adding touch event listeners to the triangle and circle.

As mentioned earlier, any of the recipes in this chapter could be modified to support mobile devices by adding touch event listeners...