Kivy Spinner:是从Spinner中选择一个值时触发的任何事件 [英] Kivy Spinner: is any event triggered when a value is selected from the Spinner

问题描述

我在窗口小部件中引入了Spinner，每当我从中选择一个不同的值时，我都想执行一些操作.

I introduce a Spinner in my widget, and I want to perform some action every time I chose a different value from it.

有可能吗?

我只能似乎得到事件和，但是当不同的价值作出选择，他们不会被触发: - (

I only seem to get events on_press and on_release, but they are not triggered when a choice for a different value is made :-(

最诚挚的问候，

Bojan

推荐答案

由于微调器每次都会更改attr:values值时更改其text属性，所以我会这样:

Beacuse the spinner updates its text property every time attr:values are changes,
I would do someting like this:

    Spinner:        
      text: '<select>'
      values: ['White', 'Yellow', 'Red', 'Green']
      on_text: root.on_spinner_select(self.text)

在python代码中:

In python code:

class RootWidget(BoxLayout):
  def on_spinner_select(self, text):
    print (text)

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