A noob question about kv language

[me2 beats]

I think it's a noob question, but I have not found a solution at the moment.

Suppose I have an app like this:

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder

kv = '''

<MyLayout>:
    canvas:
        Color
            rgb: (1, 0, 1)

        Rectangle
            pos: (self.pos[0]+10,self.pos[1]+10)
            size: (self.size[0]-20,self.size[1]-20)


BoxLayout
    MyLayout
        Label
            text:'123'
    MyLayout
        Label
            text:'456'

'''


class MyLayout(BoxLayout):
    pass


class TestApp(App):
    def build(self):
        return Builder.load_string(kv)

TestApp().run()

Can I write in the kv something like:

<MyLayout>:
    canvas:
        Color
            rgb: (1, 0, 1)

        Rectangle
            pos: (self.pos[0]+10,self.pos[1]+10)
            size: (self.size[0]-20,self.size[1]-20)
        Label
            id:l

BoxLayout
    MyLayout
        l.text:'123'
    MyLayout
        l.text:'456'


(not to write each time the word Label inside MyLayout)?

[ZenCODE]

Not like that. The "id: l" just gives you a way to reference that instance of the widget. But here, each "MyLayout" has it's own instance of a label, so that won't work. But what you can do is give the "MyLayout a string property that the label reads from. Like so.

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder

kv = '''

<MyLayout>:

    text: ''

    canvas:
        Color
            rgb: (1, 0, 1)

        Rectangle
            pos: (self.pos[0]+10,self.pos[1]+10)
            size: (self.size[0]-20,self.size[1]-20)

    Label:
        text: root.text

BoxLayout
    MyLayout
        text:'123'
    MyLayout

[me2 beats]

Yeah, that's what I was looking for. Thanks, it works :)

суббота, 18 августа 2018 г., 22:52:27 UTC+5 пользователь ZenCODE написал: