禁用日期CalendarView的不同颜色

pip install kivy

from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.popup import Popup
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.relativelayout import RelativeLayout
from kivy.uix.widget import Widget
from kivy.graphics import Color, Rectangle
from datetime import datetime, timedelta

class CalendarView(GridLayout):
    def __init__(self, **kwargs):
        super(CalendarView, self).__init__(**kwargs)
        self.cols = 7
        self.rows = 7
        self.build_calendar()

    def build_calendar(self):
        # Add day labels
        days = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
        for day in days:
            self.add_widget(Label(text=day))

        # Get current date
        today = datetime.today()
        first_day_of_month = today.replace(day=1)
        start_day = first_day_of_month.weekday()
        if start_day == 6:
            start_day = 0
        else:
            start_day += 1

        # Add empty labels for days before the first day of the month
        for _ in range(start_day):
            self.add_widget(Label(text=''))

        # Add day buttons
        days_in_month = (first_day_of_month.replace(month=first_day_of_month.month % 12 + 1, day=1) - timedelta(days=1)).day
        for day in range(1, days_in_month + 1):
            btn = Button(text=str(day))
            btn.bind(on_press=self.on_day_select)
            self.add_widget(btn)

    def on_day_select(self, instance):
        selected_day = instance.text
        popup = Popup(title='Selected Date',
                      content=Label(text=f'You selected {selected_day}'),
                      size_hint=(0.6, 0.4))
        popup.open()

class CalendarApp(App):
    def build(self):
        return CalendarView()

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

btn = Button(text=str(day), background_color=(1, 1, 1, 1))  # 白色背景