July 2009
Intermediate to advanced
464 pages
12h 25m
English
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Buttons and Selectors
Buttons and selectors are the simplest Mojo widgets. Earlier in the chapter, you saw how to use a toggle button; all the other buttons and selectors work in a very similar way. In this section, we’ll work directly with the Button widget, adding one to the News application, and we’ll touch on the other widgets in this group: Toggle Button, Check Box, Radio Button, List Selector, and Slider.
Buttons
You can use simple HTML divs styled as button widgets; these will work quite well in many cases. Button widgets, can behave dynamically, for example, displaying a spinner to show activity. Figure 3-1 shows an example of the Button widget.
Buttons are the most basic UI element, bounding an action to a region. When a user pushes a button, the button can change state and then gracefully return to the previous state, much like a doorbell. You can create unstyled buttons, or you can style them as objects, and you can label them in some way with text or images. You can disable Mojo buttons, and you can configure them to show activity indicators.
Figure 3-1. A Button widget example
Use an HTML button for initiating actions, but use a Button widget when you are combining an action initiation with an indicator, or for any asynchronous actions. As we did in Chapter 2 for switching scenes, declare HTML buttons in your view file using conventional HTML notation.
Assigning the button ...
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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.