Wsrtjtyk

I use kivy.factory.Factory to open the popups, but it's not working when I want to close them.

Code:

from kivy.app import App

from kivy.lang import Builder





x = Builder.load_string("""

#:import F kivy.factory.Factory

#:import Window kivy.core.window.Window



Screen:

    Button:

        text: 'Press to Open First Popup'

        on_press:

            F.FirstPopup().open()



<FirstPopup@Popup>:

    title: 'First Popup'

    size_hint: None, None

    width: Window.width / 1.4

    height: Window.width / 1.4



    Button:

        text: 'Press to Open Second Popup'

        on_press: F.SecondPopup().open()



<SecondPopup@Popup>:

    title: 'Second Popup'

    size_hint: None, None

    width: Window.width / 1.8

    height: Window.width / 1.8



    Button:

        text: 'Press to Close Both Popups'

        on_press:

            root.dismiss()

            F.FirstPopup().dismiss() # < DOSEN'T WORK

""")



class MyApp(App):



    def build(self):

        return x



MyApp().run()

The problem is that every time you call F.Foo() you are creating a new object of the Foo class, so in your case F.FirstPopup().open() of the Screen is different from F.FirstPopup().dismiss() SecondPopup, in other words you are closing a popup that you have just created instead of the start. To make it obvious, you can change your code to:

# ...

Button:

    text: 'Press to Close Both Popups'

    on_press:

        print(F.FirstPopup())

Obtaining the following:

<kivy.factory.FirstPopup object at 0x7f8f9a183e18>

<kivy.factory.FirstPopup object at 0x7f8f996fc118>

<kivy.factory.FirstPopup object at 0x7f8f996fc388>

<kivy.factory.FirstPopup object at 0x7f8f996fc5f8>

<kivy.factory.FirstPopup object at 0x7f8f996fc528>

<kivy.factory.FirstPopup object at 0x7f8f996fc2b8>

<kivy.factory.FirstPopup object at 0x7f8f996fc048>

And as you see each time you press it you get a new id indicating that it is a new object.

So a possible solution is to save a reference of the object created by a property:

from kivy.app import App

from kivy.lang import Builder



x = Builder.load_string("""

#:import F kivy.factory.Factory

#:import Window kivy.core.window.Window



Screen:

    Button:

        text: 'Press to Open First Popup'

        on_press:

            F.FirstPopup().open()



<FirstPopup@Popup>:

    title: 'First Popup'

    size_hint: None, None

    width: Window.width / 1.4

    height: Window.width / 1.4

    Button:

        text: 'Press to Open Second Popup'

        on_press: 

            second_popup = F.SecondPopup()

            second_popup.first_popup = root

            second_popup.open()



<SecondPopup@Popup>:

    title: 'Second Popup'

    size_hint: None, None

    width: Window.width / 1.8

    height: Window.width / 1.8

    first_popup: None

    Button:

        text: 'Press to Close Both Popups'

        on_press:

            root.dismiss()

            if root.first_popup is not None: root.first_popup.dismiss()

""")



class MyApp(App):

    def build(self):

        return x



MyApp().run()