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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StencilView – limiting the drawing space
In Chapter 3, Widget Events – Binding Actions, we avoided drawing outside of the drawing space by using simple mathematics and collide_points. It was far from perfect (for example, it fails in the group mode or when we resize it), and it was tedious and prone to programming mistakes.
That was sufficient for a first example, however, StencilView is the easier way to go here. StencilView limits the drawing area to the space occupied by itself. Anything drawn outside that area is hidden. First, let's modify the file drawingspace.py with the following header:
97. # File name: drawingspace.py 98. from kivy.uix.stencilview import StencilView 99. 100. class DrawingSpace(StencilView): 101. ...
The DrawingSpace instance ...
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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.
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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.