多个 python kivy Switch widgets with loop - 但只有一个可以是 activated/deactivated

Question

我想用多个 Switch 小部件制作一个 python kivy gui。

问题是，当我运行我的代码时，只有 Switch 个小部件 (my switch 3) 中的一个可以工作。具体来说，我可以毫无问题地打开和关闭 my switch 3，但是如果我尝试打开 my switch 2 或 my switch 1，则没有任何反应。

感谢您的帮助！

from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.switch import Switch

class SwitchClass(FloatLayout):
    def __init__(self, **kwargs):
        super(SwitchClass, self).__init__(**kwargs)
        self.size=(600, 200)
        switch_widgets = [('my switch 1', switch1_callback), 
                      ('my switch 2', switch2_callback), 
                      ('my switch 3', switch3_callback)] 
        for increment, switch_widget in enumerate(switch_widgets):   
            self.add_widget(Label(text = switch_widget[0], pos=(25, increment*50+50)))              
            self.settings_sample = Switch(active = False, pos=(125, increment*50+50))               
            self.add_widget(self.settings_sample)                   
            self.settings_sample.bind(active = switch_widget[1])   
                
def switch1_callback(switchObject, switchValue):
    pass 

def switch2_callback(switchObject, switchValue):
    pass 

def switch3_callback(switchObject, switchValue):
    pass 
        
class SwitchApp(App):
    def build(self):
        return SwitchClass()  

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

Answer 1

问题是每个 Label 和 Switch 小部件的默认 size_hint of (1,1) 意味着它们都填满了整个 SwitchClass.所以最后添加的 Switch ('my switch 3')，首先获得鼠标点击并在不允许其他 Switch 小部件机会的情况下声明它。要修复它，只需为这些小部件指定一个大小，如下所示：

class SwitchClass(FloatLayout):
    def __init__(self, **kwargs):
        super(SwitchClass, self).__init__(**kwargs)
        self.size = (600, 200)
        switch_widgets = [('my switch 1', switch1_callback),
                          ('my switch 2', switch2_callback),
                          ('my switch 3', switch3_callback)]
        for increment, switch_widget in enumerate(switch_widgets):
            print(increment, switch_widget)

            # provide sizes for the widgets:
            self.add_widget(Label(text=switch_widget[0], pos=(25, increment * 50 + 50), size_hint=(None, None), size=(100, 50)))
            self.settings_sample = Switch(active=False, pos=(125, increment * 50 + 50), size_hint=(None, None), size=(100, 50))

            self.add_widget(self.settings_sample)
            self.settings_sample.bind(active=switch_widget[1])

多个 python kivy Switch widgets with loop - 但只有一个可以是 activated/deactivated

multiple python kivy Switch widgets with loop - but only one can be activated/deactivated

python

kivy