网格布局GirdLayout在py中的引用，用于多行多列矩阵

"""
    GridLayout为网格布局为了部件为多行距阵
"""

from kivy.uix.gridlayout import GridLayout
from kivy.app import App
from kivy.uix.button import Button
from kivy.graphics import Color, Rectangle


class GridLayoutWidget(GridLayout):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        # 设置背景色
        with self.canvas:
            Color(1, 1, 1, 1)
            self.rect = Rectangle(pos=self.pos,size=self.size)
            self.bind(pos=self.update_rect, size=self.update_rect)
        # 指定列数行为rows
        self.cols= 10
        # 添加按扭
        for i in range(50):
            btn = Button(text="bt"+str(i))
            self.add_widget(btn)

    def update_rect(self, *args):
        self.rect.pos = self.pos
        self.rect.size = self.size


class GridLayoutApp(App):
    def build(self):
        return GridLayoutWidget()


if __name__ == '__main__':
    GridLayoutApp().run()