Question

我正在尝试创建一个kivy应用程序。该应用程序的工作方式如下：

我希望通过MQTT在“ tafelxuren”主题上发送我希望计时器持续的秒数（x是1到8之间的数字）。
在发送了我希望它持续的秒数后，我使用命令“ start”向主题“ tafelxstart”（x是1到8之间的数字）发送了第二条MQTT命令。
发送启动命令后，我的计时器开始运行。

在我的计时器下，我有3个按钮，分别是暂停，恢复和停止。在使用MQTT命令启动和暂停计时器时，我似乎无法使我的恢复按钮正常工作，如果在单击暂停按钮后还剩26秒，我希望我的计时器从该点恢复。而是从头开始

我的main.py：

import os
if os.name == 'posix':
    os.environ['KIVY_GL_BACKEND'] = 'gl'
import kivy, time,threading
from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.widget import Widget
from kivy.properties import NumericProperty, ObjectProperty
from kivy.clock import Clock
from kivy.config import Config
import paho.mqtt.client as mqtt
Config.set('graphics', 'fullscreen', 'auto')
import paho.mqtt.publish as publish
import paho.mqtt.subscribe as subscribe
import config

# lege MQTT-client instantie
client = None
# De topics die gebruikt worden
ingesteldetijd = [config.timeTopics['tafel1'],config.timeTopics['tafel2'],config.timeTopics['tafel3'],config.timeTopics['tafel4'],config.timeTopics['tafel5'],config.timeTopics['tafel6'],config.timeTopics['tafel7'],config.timeTopics['tafel8']]
ingesteldetijdTopics = [config.tim1, config.tim2, config.tim3, config.tim4, config.tim5, config.tim6, config.tim7, config.tim8]

starttopics = [config.startTopics['tafel1'],config.startTopics['tafel2'],config.startTopics['tafel3'],config.startTopics['tafel4'],config.startTopics['tafel5'],config.startTopics['tafel6'],config.startTopics['tafel7'],config.startTopics['tafel8']]
def on_connect(client,userdata,flags,rc):
        '''
        This function gets triggered when MQTT is connected succesfully
        '''
        if(rc == 0):
            print("[INFO   ] [MQTT        ] MQTT connected to broker "+config.settings['broker']+".")
            client.subscribe('#')
            ##################################### ingestelde tijd subscriptions #####################################
            for x in range(0,8):
                client.subscribe(ingesteldetijd[x])
                print('[INFO   ] [MQTT        ] Subscribed to '+ingesteldetijd[x])
            ##################################### ingestelde tijd subscriptions #####################################

            ##################################### start topic subscriptions #####################################
            for x in range(0,8):
                client.subscribe(starttopics[x])
                print('[INFO   ] [MQTT        ] Subscribed to '+starttopics[x])
            ##################################### start topic subscriptions #####################################
        else:
            print("MQTT connection to broker "+config.settings['broker']+"failed.")


def on_message(client,userdata,msg):
    '''
    If there's a message received on one of the topics, the messages gets handled here.
    '''
    ################################## tijd instellen topic ##################################
    if msg.topic == 'tafel1uren':
        config.tim1 = int(msg.payload.decode('utf-8'))
    if msg.topic == 'tafel2uren':
        config.tim2 = int(msg.payload.decode('utf-8'))
    if msg.topic == 'tafel3uren':
        config.tim3 = int(msg.payload.decode('utf-8'))
    if msg.topic == 'tafel4uren':
        config.tim4 = int(msg.payload.decode('utf-8'))
    if msg.topic == 'tafel5uren':
        config.tim5 = int(msg.payload.decode('utf-8'))
    if msg.topic == 'tafel6uren':
        config.tim6 = int(msg.payload.decode('utf-8'))
    if msg.topic == 'tafel7uren':
        config.tim7 = int(msg.payload.decode('utf-8'))
    if msg.topic == 'tafel8uren':
        config.tim8 = int(msg.payload.decode('utf-8'))
    ################################## tijd instellen topic ##################################

    if msg.topic == config.startTopics['tafel1']:
        if msg.payload.decode('utf-8') == 'start':
            config.tb1start = True
        if msg.payload.decode('utf-8') == 'stop':
            config.tb1start = False
    if msg.topic == config.startTopics['tafel2']:
        if msg.payload.decode('utf-8') == 'start':
            config.tb2start = True
        if msg.payload.decode('utf-8') == 'stop':
            config.tb2start = False
    if msg.topic == config.startTopics['tafel3']:
        if msg.payload.decode('utf-8') == 'start':
            config.tb3start = True
        if msg.payload.decode('utf-8') == 'stop':
            config.tb3start = False
    if msg.topic == config.startTopics['tafel4']:
        if msg.payload.decode('utf-8') == 'start':
            config.tb4start = True
        if msg.payload.decode('utf-8') == 'stop':
            config.tb4start = False
    if msg.topic == config.startTopics['tafel5']:
        if msg.payload.decode('utf-8') == 'start':
            config.tb5start = True
        if msg.payload.decode('utf-8') == 'stop':
            config.tb5start = False
    if msg.topic == config.startTopics['tafel6']:
        if msg.payload.decode('utf-8') == 'start':
            config.tb6start = True
        if msg.payload.decode('utf-8') == 'stop':
            config.tb6start = False
    if msg.topic == config.startTopics['tafel7']:
        if msg.payload.decode('utf-8') == 'start':
            config.tb7start = True
        if msg.payload.decode('utf-8') == 'stop':
            config.tb7start = False
    if msg.topic == config.startTopics['tafel8']:
        if msg.payload.decode('utf-8') == 'start':
            config.tb8start = True
        if msg.payload.decode('utf-8') == 'stop':
            config.tb8start = False

class CrudeTimerGrid(GridLayout):
    _python_access = ObjectProperty(None)
    time = NumericProperty(0)
    def __init__(self,**kwargs):
        super(CrudeTimerGrid,self).__init__(**kwargs)
        self.runningTimer = 0
        Clock.schedule_interval(self.load_times,1)
        Clock.schedule_interval(self.start,1)

    def load_times(self, *_):
        tafelobjecten = self.parent.parent.ids
        for x in range(0,8):
            if list(tafelobjecten.values())[x] == self:
                if str(list(tafelobjecten.keys())[x]) == 'tafel1':
                    self.time = config.tim1
                if str(list(tafelobjecten.keys())[x]) == 'tafel2':
                    self.time = config.tim2
                if str(list(tafelobjecten.keys())[x]) == 'tafel3':
                    self.time = config.tim3
                if str(list(tafelobjecten.keys())[x]) == 'tafel4':
                    self.time = config.tim4
                if str(list(tafelobjecten.keys())[x]) == 'tafel5':
                    self.time = config.tim5
                if str(list(tafelobjecten.keys())[x]) == 'tafel6':
                    self.time = config.tim6
                if str(list(tafelobjecten.keys())[x]) == 'tafel7':
                    self.time = config.tim7
                if str(list(tafelobjecten.keys())[x]) == 'tafel8':
                    self.time = config.tim8

    def start(self, *_):
        tafelobjecten = self.parent.parent.ids
        self.runningTimer = self.time
        for x in range(0,8):
            if list(tafelobjecten.values())[x] == self:
                if str(list(tafelobjecten.keys())[x]) == 'tafel1':
                    #self.time = config.tim1
                    if config.tb1start == True:
                        if(self.runningTimer > 0):
                            Clock.schedule_interval(self.tick,1)
                elif str(list(tafelobjecten.keys())[x]) == 'tafel2':
                    #self.time = config.tim2
                    if config.tb2start == True:
                        if(self.runningTimer > 0):
                            Clock.schedule_interval(self.tick,1)
                elif str(list(tafelobjecten.keys())[x]) == 'tafel3':
                    #self.time = config.tim3
                    if config.tb3start == True:
                        if(self.runningTimer > 0):
                            Clock.schedule_interval(self.tick,1)
                elif str(list(tafelobjecten.keys())[x]) == 'tafel4':
                    #self.time = config.tim4
                    if config.tb4start == True:
                        if(self.runningTimer > 0):
                            Clock.schedule_interval(self.tick,1)
                elif str(list(tafelobjecten.keys())[x]) == 'tafel5':
                    #self.time = config.tim5
                    if config.tb5start == True:
                        if(self.runningTimer > 0):
                            Clock.schedule_interval(self.tick,1)
                elif str(list(tafelobjecten.keys())[x]) == 'tafel6':
                    #self.time = config.tim6
                    if config.tb6start == True:
                        if(self.runningTimer > 0):
                            Clock.schedule_interval(self.tick,1)
                elif str(list(tafelobjecten.keys())[x]) == 'tafel7':
                    #self.time = config.tim7
                    if config.tb7start == True:
                        if(self.runningTimer > 0):
                            Clock.schedule_interval(self.tick,1)
                elif str(list(tafelobjecten.keys())[x]) == 'tafel8':
                    #self.time = config.tim8
                    if config.tb8start == True:
                        if(self.runningTimer > 0):
                            Clock.schedule_interval(self.tick,1)

    def pause(self):
        tafelobjecten = self.parent.parent.ids
        for x in range(0,8):
            if list(tafelobjecten.values())[x] == self:
                if str(list(tafelobjecten.keys())[x]) == 'tafel1':
                    config.tb1start = False
                    Clock.unschedule(self.tick)
                if str(list(tafelobjecten.keys())[x]) == 'tafel2':
                    config.tb2start = False
                    Clock.unschedule(self.tick)
                if str(list(tafelobjecten.keys())[x]) == 'tafel3':
                    config.tb3start = False
                    Clock.unschedule(self.tick)
                if str(list(tafelobjecten.keys())[x]) == 'tafel4':
                    config.tb4start = False
                    Clock.unschedule(self.tick)
                if str(list(tafelobjecten.keys())[x]) == 'tafel5':
                    config.tb5start = False
                    Clock.unschedule(self.tick)
                if str(list(tafelobjecten.keys())[x]) == 'tafel6':
                    config.tb6start = False
                    Clock.unschedule(self.tick)
                if str(list(tafelobjecten.keys())[x]) == 'tafel7':
                    config.tb7start = False
                    Clock.unschedule(self.tick)
                if str(list(tafelobjecten.keys())[x]) == 'tafel8':
                    config.tb8start = False
                    Clock.unschedule(self.tick)


    def resume(self, *_):
        tafelobjecten = self.parent.parent.ids
        for x in range(0,8):
            if list(tafelobjecten.values())[x] == self:
                if str(list(tafelobjecten.keys())[x]) == 'tafel1':
                    config.tb1start = True
                    Clock.schedule_interval(self.tick,1)
                if str(list(tafelobjecten.keys())[x]) == 'tafel2':
                    config.tb2start = True
                    Clock.schedule_interval(self.tick,1)
                if str(list(tafelobjecten.keys())[x]) == 'tafel3':
                    config.tb3start = True
                    Clock.schedule_interval(self.tick,1)
                if str(list(tafelobjecten.keys())[x]) == 'tafel4':
                    config.tb4start = True
                    Clock.schedule_interval(self.tick,1)
                if str(list(tafelobjecten.keys())[x]) == 'tafel5':
                    config.tb5start = True
                    Clock.schedule_interval(self.tick,1)
                if str(list(tafelobjecten.keys())[x]) == 'tafel6':
                    config.tb6start = True
                    Clock.schedule_interval(self.tick,1)
                if str(list(tafelobjecten.keys())[x]) == 'tafel7':
                    config.tb7start = True
                    Clock.schedule_interval(self.tick,1)
                if str(list(tafelobjecten.keys())[x]) == 'tafel8':
                    config.tb8start = True
                    Clock.schedule_interval(self.tick,1)        #pass

    def stop(self, *_):
        #TODO: implement stop button
        pass

    def tick(self, *_):
        tafelobjecten = self.parent.parent.ids
        if self.runningTimer > 0:
            self.runningTimer -= 1
            # publish de juiste tafel topic met de waarde van de restrerende tijd
            for x in range(0,8):
                if list(tafelobjecten.values())[x] == self:
                    client.publish(topic = str(list(tafelobjecten.keys())[x]), payload = str(self.runningTimer))
                    self.ids.Changelabel.text = str(time.strftime('%H:%M:%S',time.gmtime(self.runningTimer)))
        else:
            pass

class Main(GridLayout):
    pass

class CrudeTimerApp(App):
    pass

if __name__ == '__main__':  
    client = mqtt.Client()
    client.on_connect = on_connect
    client.on_message = on_message
    client.username_pw_set(config.settings['username'], config.settings['password'])
    client.connect(config.settings['broker'])
    t = threading.Thread(target=client.loop_start())
    t.daemon = True
    t.start()
    CrudeTimerApp().run()

我的.kv文件：

#:kivy 1.10.1
################################### Widget template ##########################################
<CrudeTimerGrid>:
    _python_access: Changelabel
    id: timer
    rows: 4
    BoxLayout:
        size_hint_y: 0.15
        orientation: 'horizontal'
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        Label:
            font_size: 20
            text: 'Restrerende tijd:'
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Line:
                    width: 2
                    rectangle: self.x, self.y, self.width, self.height
        Label:
            font_size: 20
            id: Changelabel
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Line:
                    width: 2
                    rectangle: self.x, self.y, self.width, self.height
    BoxLayout:
        size_hint_y: 0.15
        orientation: 'horizontal'
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        Label:
            font_size: 20
            text: 'Pauzetijd:'
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Line:
                    width: 2
                    rectangle: self.x, self.y, self.width, self.height
        Label:
            font_size: 20
            text: '00'
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Line:
                    width: 2
                    rectangle: self.x, self.y, self.width, self.height
    BoxLayout:
        size_hint_y: 0.2
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        Button:
            text: "Pauze"
            on_press: timer.pause()
        Button:
            text: "Hervatten"
            on_press: timer.resume()
        Button:
            text: "Stoppen"
            #on_press: timer.reset()
    Label:
        text: ''
################################### Widget template ##########################################

<Main@Widget>:
    rows: 2 # 2 rijen
    cols: 4 # 4 colums
    padding: 10 
    spacing: 10
    ################################### Tafel 1 ##########################################
    BoxLayout:
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        orientation: 'vertical'
        Label:
            size_hint_y: 0.15
            font_size: 25
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            text: 'Tafel 1'
        CrudeTimerGrid:
            id: tafel1
    ################################### Tafel 1 ##########################################

    ################################### Tafel 2 ##########################################
    BoxLayout:
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        orientation: 'vertical'
        Label:
            size_hint_y: 0.15
            font_size: 25
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            text: 'Tafel 2'
        CrudeTimerGrid:
            id: tafel2
    ################################### Tafel 2 ##########################################

    ################################### Tafel 3 ##########################################
    BoxLayout:
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        orientation: 'vertical'
        Label:
            size_hint_y: 0.15
            font_size: 25
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            text: 'Tafel 3'
        CrudeTimerGrid:
            id: tafel3
    ################################### Tafel 3 ##########################################

    ################################### Tafel 4 ##########################################
    BoxLayout:
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        orientation: 'vertical'
        Label:
            size_hint_y: 0.15
            font_size: 25
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            text: 'Tafel 4'
        CrudeTimerGrid:
            id: tafel4
    ################################### Tafel 4 ##########################################

    ################################### Tafel 5 ##########################################
    BoxLayout:
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        orientation: 'vertical'
        Label:
            size_hint_y: 0.15
            font_size: 25
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            text: 'Tafel 5'
        CrudeTimerGrid:
            id: tafel5
    ################################### Tafel 5 ##########################################

    ################################### Tafel 6 ##########################################
    BoxLayout:
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        orientation: 'vertical'
        Label:
            size_hint_y: 0.15
            font_size: 25
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            text: 'Tafel 6'
        CrudeTimerGrid:
            id: tafel6
    ################################### Tafel 6 ##########################################

    ################################### Tafel 7 ##########################################
    BoxLayout:
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        orientation: 'vertical'
        Label:
            size_hint_y: 0.15
            font_size: 25
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            text: 'Tafel 7'
        CrudeTimerGrid:
            id: tafel7
    ################################### Tafel 7 ##########################################

    ################################### Tafel 8 ##########################################
    BoxLayout:
        canvas.before:
            Color:
                rgba: .5, .5, .5, 1
            Line:
                width: 2
                rectangle: self.x, self.y, self.width, self.height
        orientation: 'vertical'
        Label:
            size_hint_y: 0.15
            font_size: 25
            canvas.before:
                Color:
                    rgba: .5, .5, .5, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            text: 'Tafel 8'
        CrudeTimerGrid:
            id: tafel8
    ################################### Tafel 8 ##########################################

Main:

我的config.py：

# MQTT broker settings.
settings = dict(
    broker = '172.16.24.128',
    username = 'pi',
    password = 'Piaservice123'
)

# start topics.
startTopics = dict(
    tafel1 = 'tafel1start',
    tafel2 = 'tafel2start',
    tafel3 = 'tafel3start',
    tafel4 = 'tafel4start',
    tafel5 = 'tafel5start',
    tafel6 = 'tafel6start',
    tafel7 = 'tafel7start',
    tafel8 = 'tafel8start'
)

# time in seconds topics.
timeTopics = dict(
    tafel1 = 'tafel1uren',
    tafel2 = 'tafel2uren',
    tafel3 = 'tafel3uren',
    tafel4 = 'tafel4uren',
    tafel5 = 'tafel5uren',
    tafel6 = 'tafel6uren',
    tafel7 = 'tafel7uren',
    tafel8 = 'tafel8uren'
)

# Currenttime topics.
currentTime = dict(
    tafel1 = 'tafel1',
    tafel2 = 'tafel2',
    tafel3 = 'tafel3',
    tafel4 = 'tafel4',
    tafel5 = 'tafel5',
    tafel6 = 'tafel6',
    tafel7 = 'tafel7',
    tafel8 = 'tafel8'
)

# Global timer vars
tim1 = 0
tim2 = 0
tim3 = 0
tim4 = 0
tim5 = 0
tim6 = 0
tim7 = 0
tim8 = 0

# startbooleans
tb1start = False
tb2start = False
tb3start = False
tb4start = False
tb5start = False
tb6start = False
tb7start = False
tb8start = False

发生所有魔力的类是CrudeTimerGrid()类。如何做到这一点，以使我的计时器不会在每次单击“恢复”按钮时重置？

编辑：设法解决了我的问题！我做了一个事件（self.event = Clock.schedule_interval(self.tick,1)），有2个按钮可以暂停和继续。我使用暂停按钮（Clock.unschedule(self.event)）取消活动安排，使用恢复按钮（Clock.schedule_once(self.event)）重新安排计时器。

Answer 1

您将无法使用Clock.unschedule(self.tick)来取消Kivy Clock事件的安排。请参考下面的示例。

https://v4-alpha.getbootstrap.com/layout/responsive-utilities/

时间表

替换

Clock.schedule_interval(self.tick, 1)

使用

self.event = Clock.schedule_interval(self.tick, 1)

计划外

，以便您可以取消使用要么

self.event.cancel()

或

Clock.unschedule(self.event)

在Kivy中实现计时器时遇到麻烦

1 个答案:

时间表

计划外