如何在Kivy中自定义style.kv [英] How to customize style.kv in Kivy

问题描述

根据 Kivy Doc ，我可以通过创建将使用的不是标准样式的本地style.kv文件来自定义kivy应用外观. 因此，我通过修改按钮小部件的行为来编辑原始文件，如下所示:

According to Kivy Doc, I can customize a kivy app look, by creating a local style.kv file that will be use instead of standard. So I edited the original file, by modifying, the behavior of the Button widget like this :

<-Button,-ToggleButton>:
    canvas:
        Color:
            rgba: [1, 0, 0, 1] if self.state == 'normal' else [0, 0, 1, 1]
        Rectangle:
            pos: self.pos
            size: self.size
        Color:
            rgba: 1, 1, 1, 1
        Rectangle:
            texture: self.texture
            size: self.texture_size
            pos: int(self.center_x - self.texture_size[0] / 2.), int(self.center_y - self.texture_size[1] / 2.)

我希望按钮的背景变为红色，并在单击时变为蓝色.但是什么也没发生，并且应用了默认行为.

I was hoping that buttons background's become red and change to blue when clicked. But nothings happen, and the default behavior was applied.

这是我主文件的内容

from os.path import abspath, dirname, join

from kivy.app import App
from kivy.resources import resource_add_path, resource_find
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button


class MainLayout(BoxLayout):
    def __init__(self, **kwargs):
        super(MainLayout, self).__init__(**kwargs)
        self.add_widget(Button(text="Button1"))
        self.add_widget(Button(text="Button2"))

class MainApp(App):
    def build(self):
        return MainLayout()


if __name__ == '__main__':
    res_path = join(dirname(abspath(__file__)), "custom")
    resource_add_path(res_path)
    print("find ", resource_find("data/style.kv"))
    MainApp().run()

在运行时，style.kv的本地路径会很好地打印出来.

At runtime, the local path of the style.kv is well printed.

非常感谢所有帮助！

推荐答案

即使文档说，您可以按照尝试的方式完全自定义kivy，但看起来并不可行.但是，只需使用kivy.lang.Builder加载修改后的style.kv，即可使其工作. 例如:

Even though the documentation says that you can customize kivy exactly the way you have attempted, it does not look like it works. However, you can get it to work by just loading your modified style.kv using kivy.lang.Builder. For example:

from kivy.lang import Builder

Builder.load_string('''
<-Button,-ToggleButton>:
    canvas:
        Color:
            rgba: [1, 0, 0, 1] if self.state == 'normal' else [0, 0, 1, 1]
        Rectangle:
            pos: self.pos
            size: self.size
        Color:
            rgba: 1, 1, 1, 1
        Rectangle:
            texture: self.texture
            size: self.texture_size
            pos: int(self.center_x - self.texture_size[0] / 2.), int(self.center_y - self.texture_size[1] / 2.)
''')

from os.path import abspath, dirname, join

from kivy.app import App
from kivy.resources import resource_add_path, resource_find
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button


class MainLayout(BoxLayout):
    def __init__(self, **kwargs):
        super(MainLayout, self).__init__(**kwargs)
        self.add_widget(Button(text="Button1"))
        self.add_widget(Button(text="Button2"))

class MainApp(App):
    def build(self):
        return MainLayout()

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

这篇关于如何在Kivy中自定义style.kv的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！