获取kivy中选中复选框的值 [英] get value of selected checkbox in kivy

问题描述

import sqlite3 as lite

from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.lang import Builder
from kivy.core.window import Window

Window.size = (600, 325)

class UserGroup(Screen):

    def insert_data(self, arg1,arg2):
        print(arg1)
        print(arg2)


class FactUserGroup(App):

    def build(self):
        self.root = Builder.load_file('test.kv')
        return self.root


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

test.kv

<CustomLabel@Label>:
    text_size: self.size
    valign: "middle"
    padding_x: 5

<SingleLineTextInput@TextInput>:
    multiline: False

<GreenButton@Button>:
    background_color: 1, 1, 1, 1
    size_hint_y: None
    height: self.parent.height * 0.120

UserGroup

    GridLayout:
        cols: 2
        padding : 30,30
        spacing: 20, 20
        row_default_height: '30dp'

        Label:
            text: 'Male'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'
            id : chk


        Label:
            text: 'Female'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'

        CustomLabel:
            text: 'age'
            text_size: self.size
            valign: 'middle'

        SingleLineTextInput:
            id: age


        GreenButton:
            text: 'Ok'
            on_press: root.insert_data(chk.text,age.text)


        GreenButton:
            text: 'Cancel'
            on_press: app.stop()

如何获取复选框的值?我正在使用 age.text 获取年龄文本框的值，但我不知道复选框的值?
单击确定"时，如何获取选中的复选框值并传入 root.insert_data.

How to get value of checkbox?I am getting value of age textbox using age.text but checkbox value i don't know?
When click on 'Ok' then How to get selected checkbox value and pass in root.insert_data.

推荐答案

您可以通过其 active 属性来获取复选框的选中状态，因此请尝试更改:

You can get the checked state of a checkbox with its active property, so try change:

GreenButton:
    text: 'Ok'
    on_press: root.insert_data(chk.active ,age.text)

在此代码段中，chk.text 已更改为 chk.active，这对我很有效.

In this snippet chk.text was changed to chk.active which works for me properly.

在 https://kivy.org/docs 查看更多关于 kivy 复选框的参考资料/api-kivy.uix.checkbox.html

希望对您有所帮助.试试看吧.

Hope it helps. Give it a try.

因此，为了能够获取每个复选框的属性和文本输入，您可以将 ObjectProperties 分配给小部件，并且可以将它们链接到您的 test.py文件.

So in order to be able to get the properties of each checkbox and the text input you can assign ObjectProperties to the widgets, and you can link them to your test.py file.

修改后的来源:

from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.lang import Builder
from kivy.core.window import Window
from kivy.properties import ObjectProperty

Window.size = (600, 325)

class UserGroup(Screen):
    male = ObjectProperty(None)
    female = ObjectProperty(None)
    age = ObjectProperty(None)
    
    def insert_data(self):
        if self.male.active:
            print('Male')
        elif self.female.active:
            print('Female')
        else:
            print('No gender selected')
        print(self.age.text)


class FactUserGroup(App):

    def build(self):
        self.root = Builder.load_file('test.kv')
        return self.root


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

在 .py 文件中，您可以找到 ObjectProperty 的新导入.您还可以看到，在 UserGroup 中定义了三个新属性来与视图交互，并且在 UserGroup.insert_data 中的修改非常简单.

In the .py file you can find a new import of ObjectProperty. Also you can see that three new properties were defined in UserGroup to interact with the view, and the modifications in UserGroup.insert_data are straightforward.

<CustomLabel@Label>:
    text_size: self.size
    valign: "middle"
    padding_x: 5

<SingleLineTextInput@TextInput>:
    multiline: False

<GreenButton@Button>:
    background_color: 1, 1, 1, 1
    size_hint_y: None
    height: self.parent.height * 0.120

UserGroup

    male: chk_male
    female: chk_female
    age: txt_age

    GridLayout:
        cols: 2
        padding : 30,30
        spacing: 20, 20
        row_default_height: '30dp'

        Label:
            text: 'Male'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'
            id : chk_male

        Label:
            text: 'Female'
            text_size: self.size
            valign: 'middle'

        CheckBox:
            group: 'check'
            id: chk_female

        CustomLabel:
            text: 'age'
            text_size: self.size
            valign: 'middle'

        SingleLineTextInput:
            id: txt_age


        GreenButton:
            text: 'Ok'
            on_press: root.insert_data()


        GreenButton:
            text: 'Cancel'
            on_press: app.stop()

在 .kv 文件中，两个复选框的 id 和文本输入被重命名为 chk_male、chk_female 和 txt_age 分别.

In the .kv file the ids of the two checkboxes and the text input are renamed to chk_male, chk_female and txt_age respectively.

您还可以看到，对象属性链接是在 UserGroup 部分的开头定义的.

Also you can see that the object property links are defined at the beginning of the UserGroup section.

希望它有意义并符合您的要求.

Hope it makes sense and match your requirements.

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