test.py

# -*- encoding: UTF-8 -*-


from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.widget import Widget
#kivy.require(’1.0.6’) 

from kivy.graphics import Quad
from kivy.uix.gridlayout import GridLayout


class MyWidget(Widget):

    def __init__(self, *args, **kwargs):

        kwargs.setdefault('width', 100)
        kwargs.setdefault('height', 150)

        super(MyWidget, self).__init__(*args, **kwargs)
        self.bind(pos=self.refresh)
        self.bind(size=self.refresh)

    def refresh(self, *args):
        self.canvas.clear()
        with self.canvas:
            Quad(points=(
                self.x, self.y + 10,
                self.right, self.y + 10,
                self.right, self.top,
                self.x, self.top
                ))


class TestApp(App):
    def build(self):
        layout = GridLayout(cols=4, padding=20, spacing=10, size_hint=(1, 1))
        for i in range(8):
            card = MyWidget() 
            layout.add_widget(card)
        return layout


TestApp().run()