Boxlayout

Date: February 24th 2016
Last updated: February 24th 2016

Box layout arranges "children" in horizontal or vertical positions. A simple box layout can "pass" and the GUI is constructed using the kv file.

main.py

import kivy
kivy.require('1.9.0')

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout

class Sample(BoxLayout):
    # BoxLayout GUI made using kv file below
    pass

class SampleApp(App):
    # note the consistency with 
    # the BoxLayout classs name!
    def build(self):
        # return the boxlayout class defined above
        return Sample()

if __name__ == '__main__':
    # call SampleApp NOT the boxlayout
    # The SampleApp returns the boxlayout called Sample()
    SampleApp().run()

sample.kv
Note the kv file name is in reference to SampleApp (strip off App and make the rest lowercase)

#:kivy 1.9.0
<Sample>:
    orientation: 'vertical'
    Label:
        text: 'Guess N sampling game!'
    TextInput:
        text: 'Guess N...'
    BoxLayout:
        orientation: 'horizontal'
        Button:
            text: 'Guess!'
        Button:
            text: 'Clear'
        Button:
            text: 'Quit'

Output
Things to note:

• Each object gets equal spacing
• Four objects vertical layout gets 25% spacing
• horizontal spacing is the same.