問題描述

如何正確地為 switch_id 和 switch_id_popup 創(chuàng)建活動屬性，以便可以使用 kivy 時鐘在 timer_loop 內(nèi)創(chuàng)建條件語句?

How do I properly create active properties for switch_id and switch_id_popup so I can create a conditional statement inside of timer_loop with kivy clock?

我在一個類似問題上得到了很好的反饋(再次感謝 eyllanesc)，但由于涉及到彈出窗口，我無法采納建議.

I got great feedback on a similar question(thanks again eyllanesc), but I am unable to incorporate advice now that popup is involved.

下面是說明我的問題的草圖.我已經(jīng)用箭頭標識了所有有問題的區(qū)域.預(yù)先感謝您的任何幫助.

Below is a sketch that illustrates my issue. I have identified all of the areas in question with arrows. Thank you in advance for any help.

from kivy.app import App
from kivy.lang import Builder
from kivy.clock import Clock
import time
from kivy.uix.popup import Popup

theRoot = Builder.load_string('''

<CustomPopup1>:

    StackLayout:
        active2: switch_id_popup.active #<---- switch_id_popup declared here(active2)


        Switch:                         #<---- This switch (switch_id_popup)
            id: switch_id_popup
            size_hint: .5, .5
            active: switch_id_popup.active

        Button:
            text: 'Close'
            on_release: root.dismiss()
            size_hint: .5, .5



StackLayout:
    active1: switch_id.active           #<---- switch_id declared here(active1)
    orientation: 'lr-tb'
    padding: 10
    spacing: 5


    Label:
        text: "Zone 1 Valve"
        size_hint: .25, .1

    Switch:                             #<---- This switch (switch_id)
        id: switch_id
        size_hint: .25, .1
        active: switch_id.active


    Button:
        text: "Program 1"
        on_press: app.open_popup1()
        size_hint: .5,.1

''')


class CustomPopup1(Popup):
    pass

class theApp(App):


    def build(self):
        Clock.schedule_interval(self.timer_loop, 2)
        return theRoot


    def timer_loop(self, dt):  

        if theRoot.active1 and theRoot.active2: #<---- How do I make this work if switch_id_popup is within a popup?
            print("Do something")
        else:
            print("Do nothing")

    def open_popup1(self):
        the_popup = CustomPopup1()
        the_popup.open()


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

推薦答案

正如我在我之前的解決方案中提到的，你應(yīng)該將每個類視為一個黑盒，并公開允許您獲取和建立值的屬性.對于 Popup，active 屬性必須是類的一部分，而不是內(nèi)部 StackLayout.另一方面，在 open_popup 方法中，您總是在創(chuàng)建一個新的 Popup，當您關(guān)閉它時將刪除它，使該屬性不可訪問，因此我們推斷必須有一個具有更大范圍的 Popup 對象，因為它必須在外部創(chuàng)建App 類的成員或成為它的成員.最后，active2 不是 theRoot 的屬性.

As I mentioned in my previous solution, you should consider each class as a black box and expose properties that allow you to obtain and establish values. In the case of Popup, the active property must be part of the class and not the internal StackLayout. On the other hand in the open_popup method you are always creating a new Popup that will be deleted when you close it making the property is not accessible, so we deduce that there must be a Popup object with a larger scope for it must be created outside of theApp class or be a member of it. Lastly, active2 is not a property of theRoot.

綜合以上，得到如下解決方案:

Considering the above, the following solution is obtained:

from kivy.app import App
from kivy.lang import Builder
from kivy.clock import Clock
import time
from kivy.uix.popup import Popup

theRoot = Builder.load_string('''
<CustomPopup>:
    active: switch_id_popup.active
    StackLayout:
        Switch:
            id: switch_id_popup
            size_hint: .5, .5
        Button:
            text: 'Close'
            on_release: root.dismiss()
            size_hint: .5, .5

StackLayout:
    active: switch_id.active
    orientation: 'lr-tb'
    padding: 10
    spacing: 5
    Label:
        text: "Zone 1 Valve"
        size_hint: .25, .1
    Switch:
        id: switch_id
        size_hint: .25, .1
    Button:
        text: "Program 1"
        on_press: app.open_popup()
        size_hint: .5,.1

''')

class CustomPopup(Popup):
    pass


class TheApp(App):
    def build(self):
        self.the_popup = CustomPopup()
        Clock.schedule_interval(self.timer_loop, 2)
        return theRoot

    def timer_loop(self, dt):  
        if self.root.active and self.the_popup.active:
            print("Do something")
        else:
            print("Do nothing")

    def open_popup(self):
        self.the_popup.open()


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

這篇關(guān)于Kivy 時鐘和彈出窗口的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！