Kivy技术问询：如何设置禁用状态下Button的文本颜色

I ran into this exact issue back when using Kivy 1.10.x—turns out, even though Button inherits from Label (which has the disabled_color property), the Button widget doesn't automatically switch its text color to disabled_color when it's disabled in older versions like 1.10.1.

The Solution: Bind the Color to the Disabled State #

You need to explicitly tie the color property to the button's disabled status, so it uses disabled_color when disabled, and your normal color otherwise. Here's how to modify your KV code:

Button:
    font_size: '35sp'
    # Bind color to switch based on disabled state
    color: self.disabled_color if self.disabled else (1, 1, 1, 1)
    disabled_color: 25/255, 25/255, 25/255, 1
    # Background settings remain the same
    background_normal: 'button_normal.png'
    background_down: 'button_down.png'
    background_disabled_normal: 'button_normal_disn.png'
    background_disabled_down: 'button_normal_disd.png'

Why This Works #

In Kivy 1.10.1, the Button widget doesn't inherit the automatic text color switching behavior from Label. By using a conditional expression in the color property, we're telling Kivy:

• If the button is disabled (self.disabled is True), use self.disabled_color for the text
• Otherwise, use the normal white color (1,1,1,1)

Note for Future Reference #

If you ever upgrade to Kivy 1.11.0 or later, this behavior was adjusted—Button will now automatically use disabled_color for text when disabled, so you won't need this manual binding anymore. But for your current 1.10.1 setup, this binding is the way to go.

内容的提问来源于stack exchange，提问作者fritte2000