In 100 pages, you will learn to create and use widgets using Dashcode. Widgets are simple, typically small applications for a specific purpose, such as a weather report, a calculator, a stock quote, and the like that reside on the Mac Dashboard. Building these before Dashcode was time consuming though not hard; but now, you can whip up a widget fast. Creating Mac Widgets with Dashcode teaches you how.

Read more at: http://www.apress.com/book/view/1430209674.