How to set Kivy TextInput background color depending on focus

Question

Kivy has the properties background_active and background_normal for setting a TextInput widget's background when it is in focus and when it is not in focus, respectively. However, this sets a background image, and not an rgba color. There is a background_color property, but this sets the TextInput's background color regardless of whether or not it is in focus.

How can I change an TextInput's background color depending on whether or not it is focused?

Answer 1

Try creating a new TextInput in the KV file

<MyTextInput@TextInput>:
    background_color: (1,0,0,1) if self.focus else (0,0,1,1)

This will bind the focus attribute so the color will change according to the focus...