在kivy制作一个时钟

Question

我是Kivy的新手，我正在努力更好地处理事件，以及框架的一些基础知识。

为此目的，任何人都可以提供在Kivy中实现的简单时钟的代码，它显示当前时间并每秒更新一次吗？

Answer 1

简单的图形化如何：

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.graphics import Color, Line
from kivy.uix.floatlayout import FloatLayout
from math import cos, sin, pi
from kivy.clock import Clock
from kivy.lang import Builder
from kivy.properties import NumericProperty

import datetime

kv = '''
#:import math math

[ClockNumber@Label]:
    text: str(ctx.i)
    pos_hint: {"center_x": 0.5+0.42*math.sin(math.pi/6*(ctx.i-12)), "center_y": 0.5+0.42*math.cos(math.pi/6*(ctx.i-12))}
    font_size: self.height/16

<MyClockWidget>:
    face: face
    ticks: ticks
    FloatLayout:
        id: face
        size_hint: None, None
        pos_hint: {"center_x":0.5, "center_y":0.5}
        size: 0.9*min(root.size), 0.9*min(root.size)
        canvas:
            Color:
                rgb: 0.1, 0.1, 0.1
            Ellipse:
                size: self.size     
                pos: self.pos
        ClockNumber:
            i: 1
        ClockNumber:
            i: 2
        ClockNumber:
            i: 3
        ClockNumber:
            i: 4
        ClockNumber:
            i: 5
        ClockNumber:
            i: 6
        ClockNumber:
            i: 7
        ClockNumber:
            i: 8
        ClockNumber:
            i: 9
        ClockNumber:
            i: 10
        ClockNumber:
            i: 11
        ClockNumber:
            i: 12
    Ticks:
        id: ticks
        r: min(root.size)*0.9/2
'''
Builder.load_string(kv)

class MyClockWidget(FloatLayout):
    pass

class Ticks(Widget):
    def __init__(self, **kwargs):
        super(Ticks, self).__init__(**kwargs)
        self.bind(pos=self.update_clock)
        self.bind(size=self.update_clock)

    def update_clock(self, *args):
        self.canvas.clear()
        with self.canvas:
            time = datetime.datetime.now()
            Color(0.2, 0.5, 0.2)
            Line(points=[self.center_x, self.center_y, self.center_x+0.8*self.r*sin(pi/30*time.second), self.center_y+0.8*self.r*cos(pi/30*time.second)], width=1, cap="round")
            Color(0.3, 0.6, 0.3)
            Line(points=[self.center_x, self.center_y, self.center_x+0.7*self.r*sin(pi/30*time.minute), self.center_y+0.7*self.r*cos(pi/30*time.minute)], width=2, cap="round")
            Color(0.4, 0.7, 0.4)
            th = time.hour*60 + time.minute
            Line(points=[self.center_x, self.center_y, self.center_x+0.5*self.r*sin(pi/360*th), self.center_y+0.5*self.r*cos(pi/360*th)], width=3, cap="round")

class MyClockApp(App):
    def build(self):
        clock = MyClockWidget()
        Clock.schedule_interval(clock.ticks.update_clock, 1)
        return clock

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

编辑：我将代码更新为1.8.0版，修复了显示标签的问题

Answer 2

这是一个非常简单的时钟：

from kivy.app import App
from kivy.uix.label import Label
from kivy.clock import Clock

import time

class IncrediblyCrudeClock(Label):
    def update(self, *args):
        self.text = time.asctime()

class TimeApp(App):
    def build(self):
        crudeclock = IncrediblyCrudeClock()
        Clock.schedule_interval(crudeclock.update, 1)
        return crudeclock

if __name__ == "__main__":
    TimeApp().run()