June 2015
Intermediate to advanced
206 pages
4h 32m
English
Content preview from Kivy - Interactive Applications and Games in PythonBecome 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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Creating your own events – the magical properties
This section covers the use of the Kivy properties. A Kivy property triggers an event every time we modify it. There are different types of properties, from the simple NumericProperty or StringProperty to much more complex versions such as ListProperty, DictProperty, or ObjectProperty. For example, if we define a StringProperty called text, then an on_text event is going to be triggered each time the text is modified.
Note
Once we define a Kivy property, Kivy internally creates an event associated with that property. The property event is referenced adding the prefix on_ to the name of the property. For example, the on_translation method (line 246) is associated with ListProperty in line 219 called ...
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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.