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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Structuring graphic instructions
Apart from the canvas instance, a Widget includes two other canvas instances: canvas.before and canvas.after.
Note
The Widget class has three sets of instructions (canvas.before, canvas, and canvas.after) to organize the order of execution. With them, we can control which elements will go to the background or stay on the foreground.
The following drawing.kv file shows an example of these three sets (lines 92, 98, and 104) of instructions:
90. # File name: drawing.kv (Before and After Canvas) 91. <DrawingSpace>: 92. canvas.before: 93. Color: 94. rgba: 1,0,0,1 95. Rectangle: 96. pos: 0,0 97. size: 100,100 98. canvas: 99. Color: 100. rgba: 0,1,0,1 101. Rectangle: 102. pos: 100,0 103. size: 100,100 104. canvas.after: 105. ...
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