By Mitch Allen
A word from the writer and from O'Reilly Media approximately what this bookdoes--and doesn't--do:
Palm webOS is a new platform and represents a truly varied sort ofoperating approach the place the net runtime is used because the foundation for the UI andApplication version. Palm and O'Reilly felt that it was once very important to have abook to be had to aid builders get a uncomplicated figuring out of the recent Palmplatform on the time that the SDK was once published; this timing performed a majorrole within the content material and constitution of the book.
Ideally this booklet may were an entire reference of the hot platformbut that wasn't attainable because the content material used to be written while asthe software program SDK used to be being built via the Palm engineering workforce. The bookdoes supply an entire review of Palm webOS, a radical description ofthe program version and provides info on many key layout ideas. Thereare descriptions and examples of UI widgets, providers, storage,notifications, dashboards and history functions, serving as a greatintroduction yet now not as a definitive source.
The e-book makes use of an easy information reader program to demonstrate the technicaldescriptions however the examples usually are not meant to function a cookbooktutorial. skilled builders will be capable of use the examples to buildup a operating program bankruptcy by means of bankruptcy yet others won't locate theloose descriptions sufficient for recreating the applying unaided. additional time, those assorted wishes could be crammed by way of different books, yet in themeantime we are hoping that this e-book will serve a important function introducingdevelopers to webOS and giving them a manner of having begun with webOSapplication development.
A moment printing of the e-book will replace any unique insurance obsoleted bysubsequent Mojo SDK builds. For proprietors of the unique printing of the book,all of those updates are published at the "View/Submit Errata" hyperlink (please seeleft-hand column of this net page).
- Get a radical assessment of the webOS platform and architecture
- Understand the severe strategies for program layout: what separates webOS from different internet and cellular platforms
- Learn the main points of Mojo's improvement instruments and SDK for construction and checking out cellular applications
- Examine top practices, vital concerns, and guiding rules for constructing with webOS and the Mojo framework
Read or Download Palm webOS PDF
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Additional info for Palm webOS
6 kernel, with a combination of open source and Palm components providing user space services, referred to as the Core OS. You won’t have any direct interaction with the Core OS, nor will the end users. Instead your access is through Mojo and the various services. Users interact with applications and the UI System Manager, which is responsible for the System UI. Collectively, this is known as the application environment. Figure 1-11 shows a simplified view of the webOS architecture. Figure 1-11.
Strict JSON parser; this file must follow all the rules for correct JSON. png as the icon for your application. Application icons should be 64 × 64 pixels, encoded as a PNG with 24 bit/pixel RGB and 8 bits alpha. The icon’s image should be about 56 × 56 pixels within the PNG bounds. 28 | Chapter 2: Application Basics Refer to the webOS style guidelines found in the SDK documentation for more information about icon design. html is the first page loaded when a webOS application is launched. html, but you do need to load the Mojo framework here.
A set of the News wireframes is shown in Figure 2-1. This shows the main scene of the News application with a featured story in the top third of the screen. This is a text scroller widget encapsulated with a base div style called palm-group-title. Below the feature story area is the feed list widget, which serves as an index of the selected feeds. At the top of the scene is a search field built with a filterlist widget, which is hidden until some text is keyed, at which point the entered text will be used in a keyword search of the entire feed database.