python : How to make label bold in kivy

Question

我正在使用 Popup python-2.7 中的小部件和 kivy 。有人能帮我吗？
1.如何使标签加粗？ (例如 text: "make label bold")
2. 如何改变标题的颜色？ (例如 title : "change title color")

测试文件

from kivy.app import App
from kivy.core.window import Window
from kivy.uix.popup import Popup

class abc(Popup):
    def __init__(self, **kwargs):
        super(abc, self).__init__(**kwargs)
        self.open()


class TestApp(App):
    def build(self):
        return abc()


TestApp().run()

测试.kv

<abc>
    title : "change title color"
    BoxLayout:
        orientation: "vertical"
        GridLayout:
            Label:
                text: "make label bold"

Answer 1

粗体标签文本

有两种方法可以使标签的文本加粗。它们如下:

方法一

使用 bold: True

Label:
    bold: True

Label » bold

bold

Indicates use of the bold version of your font.

Note

Depending of your font, the bold attribute may have no impact on your text rendering.

bold is a BooleanProperty and defaults to False.

方法二

使用 Markup text , markup: True

Label:
    markup: True
    text: '[b]make label bold[/b]

更改标题颜色

使用 title_color

<abc>
    title : "change title color"
    title_color: [1, 0, 0, 1]    # red title

Popup » title_color

title_color

Color used by the Title.

title_color is a ListProperty and defaults to [1, 1, 1, 1].

例子

主文件

from kivy.app import App
from kivy.uix.popup import Popup
from kivy.uix.button import Button
from kivy.lang import Builder


Builder.load_string('''
#:kivy 1.11.0

<abc>
    title : "change title color"
    title_color: 1, 0, 0, 1    # red title
    BoxLayout:
        orientation: "vertical"
        GridLayout:
            cols: 1
            Label:
                bold: True
                text: "make label bold"

            Label:
                markup: True
                text: "[b]make label bold[/b]"

''')


class abc(Popup):
    pass


class PopupApp(App):
    title = 'Popup Demo'

    def build(self):
        self._popup = abc()
        return Button(text="press me", on_press=self._popup.open)


PopupApp().run()

输出