Changing text in Kivy custom button class

Question

Following code from here I've created a simple button with rounded corners like so:

<RoundedButton@Button>:
background_color: 0,0,1,0  
canvas.before:
    Color:
        rgba: (.216,.118,.329,1) if self.state=='normal' else (0,.7,.7,1)  
    RoundedRectangle:
        pos: self.pos
        size: self.size
        radius: [10,]
RelativeLayout:     
    pos: self.parent.pos
    size: self.parent.size
    Label:
        text: 'Button Text'
        font_size: 20
        pos_hint: {'center_x': 0.5,'center_y':0.5}
        id: _labeltext

When I use this button in my kv code, I'd like a simple way to change the text of the button, which I'd like to do using the id value '_labeltext'. This seems like it should be simple but I've not been able to find how to change this in the KV code rather than in python (as a response to an action). I'd just like to reuse my button design multiple times with different text. For example (I know this doesn't work):

RoundedButton:
self.ids._labeltext.text: 'New Button Text'

Thanks

P.S. can't get indentation correct in the editor, apologies

The indentation in your kv is incorrect. Please adjust your posted kv to reflect the actual indentation used. Is the RelativeLayout part of the RoundedButton ? — John Anderson
Yes, I had really issues with this in the text editor. I pasted the code with indentations complete but this didn't copy over. I wasn't able to then add additional tabs to correct it. Do you know how I do this? — Wiredchop

John Anderson John Anderson · Accepted Answer · 2020-12-03T14:30:35

You can adjust the text of the RoundedButton just as you would any other Button:

RoundedButton:
    text: 'Hello'

Changing text in Kivy custom button class

1 Answers