July 2009
Intermediate to advanced
464 pages
12h 25m
English
Content preview from Palm webOSBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Application Framework and OS
Through Palm’s application framework, applications can embed UI widgets with sophisticated editing, navigation, and display features, enabling more sophisticated application UI. The framework also includes event handling, notification services, and a multitasking model. Applications can run in the background, managing data, events, and services behind the scenes while engaging the user when needed.
You can create and manage your own persistent data using HTML 5 storage functions and you can access data from some of the webOS core applications, such as Contacts and Calendar. You also have access to some basic system services, most of which are device-resident, such as Location services and Accelerometer data, along with some web services, such as Publish and Subscribe.
Architecturally, Palm webOS is an embedded Linux operating system that hosts a custom UI System Manager anchored by the open source WebKit core. The System Manager provides a full range of system UI features including navigation, application launching and lifecycle management, event management and notifications, system status, local and web searches, and renders application HTML/CSS/JavaScript code.
You don’t need to build a webOS application to make your web content accessible to webOS devices. Palm webOS maintains a separate instance of WebKit, which supports a browser application to handle standard web pages and browser-based web applications. While it’s expected that more and more web ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.