July 2009
Intermediate to advanced
464 pages
12h 25m
English
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All About Widgets
Widgets are dynamic UI controls that can be integrated within any application. They can be tailored to the application, yet provide reusable, stylistically consistent UI functions. The term “widgets” is widely used within web development, but Mojo widgets are different than other widgets. Mojo widgets have a defined behavior and have many options; they generate complex HTML and are easily styled with CSS.
It helps to understand the HTML that the widget generates. This is especially true for widgets like List and Dialog, for which the application specifies HTML templates that largely define the widget’s appearance.
Declaring Widgets
Widgets are declared in HTML as empty div tags:
<div id="my-toggle" x-mojo-element="ToggleButton"></div>
The x-mojo-element attribute
specifies the widget type used to fill out the div when the HTML is
added to the page. This can happen in either of the following
circumstances:
When a scene is pushed and the scene’s view HTML includes widgets.
When a widget is specified in an HTML template used by another widget.
When the application inserts HTML which includes widgets, and makes a call to explicitly instantiate them.
In the second case, for example, if your scene includes a List widget whose list items include other widgets, a new set of the list item’s widgets are instantiated each time a new item is added to the list.
Setting Up a Widget
Before a widget is inserted into the scene, it must be set up. You should do this in the scene assistant’s ...
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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.