无法更改BoxLayout的高度

Question

我想要改变一个嵌套在另一个BoxLayout里的BoxLayout的高度。我试过了十几种不同的组合，包括大小、大小提示和高度，但都没有效果。问题是，不管我怎么做，"ContainerBox"这个BoxLayout里面的BoxLayouts总是保持一样的大小。我该怎么改变嵌套BoxLayouts的高度呢？我想用kv语言来设置高度，而不是用Python代码。

Python

import kivy
kivy.require('1.7.1')
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.textinput import TextInput
from kivy.uix.widget import Widget
from kivy.properties import ObjectProperty
from kivy.core.window import Window
Window.clearcolor = (1, 1, 1, 1)

class ContainerBox(BoxLayout):
def __init__(self, **kwargs):
    super(ContainerBox, self).__init__(**kwargs)

class Header(BoxLayout):
def __init__(self, **kwargs):
    super(Header, self).__init__(**kwargs)

class Toolbar(BoxLayout):
def __init__(self, **kwargs):
    super(Toolbar, self).__init__(**kwargs)     

class LoginScreen(GridLayout):
    f_username = ObjectProperty(None)
    f_password = ObjectProperty(None)   
    def __init__(self, **kwargs):
        super(LoginScreen, self).__init__(**kwargs)     

class LoginApp(App):
    def build(self):
        return ContainerBox()


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

Kv文件

# kivy 1.7.1
<LoginScreen>:
    f_username: username
    f_password: password
    GridLayout:
        size: root.width, 200
        pos: root.pos
        row_default_height: 10
        rows: 3
        cols: 2
        padding: 20
        spacing: 10     
        Label:
            text: 'User Name:'
            color: 0.212, 0.486, 0.169, 1
            font_size: 24
        TextInput:
            id: username
        Label:
            text: 'Password:'
            color: 0.212, 0.486, 0.169, 1
            font_size: 24
        TextInput:
            id: password
            password: True
        Label:
        Button:
            text: 'Login'
            background_normal: 'white_20x20.png'
            background_color: 0.212, 0.486, 0.169, 1
            font_size: 24

<Header>:
    BoxLayout:
        orientation: 'vertical'
        height: 100
        size_hint_x: 1
        size_hint_y: None
        Label:
            text: 'Dealer App'
            color: 0.212, 0.486, 0.169, 1
            font_size: 48


<Toolbar>           
    BoxLayout:
        orientation: 'horizontal'
        height: 36
        size_hint_x: 1
        size_hint_y: None
        pos: root.pos
        spacing: 5  
        Button:
            text: 'One'
            background_normal: 'white_20x20.png'
            background_color: 0.212, 0.486, 0.169, 1
            font_size: 16
        Button:
            text: 'Two'
            background_normal: 'white_20x20.png'
            background_color: 0.212, 0.486, 0.169, 1
        Button:
            text: 'Three'
            background_normal: 'white_20x20.png'
            background_color: 0.212, 0.486, 0.169, 1
        Button:
            text: 'Four'
            background_normal: 'white_20x20.png'
            background_color: 0.212, 0.486, 0.169, 1


<ContainerBox>:
    BoxLayout:
        orientation: 'vertical'
        Header:
        Toolbar:
        LoginScreen:

界面布局高度设置 kv语言组件大小 boxlayout 嵌套布局

无法更改BoxLayout的高度

1 个回答

撰写回答