Question

在普通Kivy中，当您在按钮上设置disabled属性时，该按钮会自动变灰以显示状态变化。但是KivyMD的MD *按钮似乎没有这样做。我尝试绑定到disabled并手动更改一些属性，但是如下面的示例所示，再次启用该按钮后，似乎无法恢复颜色。如何在KivyMD中显示禁用的按钮？什么是在状态更改时更改其颜色的正确方法？这种信息是否记录在某处？

# Shows two round flat buttons, "Control" and "Button".  The former toggles enabled/disabled status of the latter.
from kivymd.app import MDApp
from kivymd.uix.boxlayout import MDBoxLayout
from kivy.properties import ObjectProperty
from kivy.lang import Builder

class MyLayout (MDBoxLayout):
    control = ObjectProperty (None)
    def on_press (self):
        self.button.disabled = not self.button.disabled # Doesn't change color
        if self.button.disabled:
            self.button.color = (.4,.4,.4,.4)  # Doesn't do anything
            self.button.md_bg_color = (.8,.8,.8,1)  # Changes background
        else:
            self.button.color = self.button.theme_cls.primary_color  # Doesn't do anything
            self.button.md_bg_color = self.button.theme_cls.primary_color  # Fills the whole thing, effectively turning this into MDFillRoundFlatButton, which I don't want
            # self.button.md_bg_color = (1,1,1,1)  # Obliterates distinction between border and fill
            self.button.bg_color = (1,1,1,1)  # Doesn't do anything

class TestApp (MDApp):
    def build (self):
        self.theme_cls.primary_palette
        return Builder.load_string ('''
MyLayout:
    control: control
    button: button
    MDRoundFlatButton:
        id: control
        text: "Control"
        on_press: root.on_press ()
        size_hint: (.3,.3)
        font_size: "50sp"
    MDRoundFlatButton:
        id: button
        text: "Button"
        md_bg_color_disabled: (.4,.4,.4,.4) # Does nothing AFAICT
        size_hint: (.3,.3)
        font_size: "50sp"
''')

if __name__ == '__main__':
    TestApp ().run ()

如何在KivyMD中正确显示禁用的按钮？

0 个答案: