如何在 kivy 中制作文件选择器以支持不同语言的文件(英语、希伯来语)

How to make a file chooser in kivy to support files with different languages (English, Hebrew)

我正在使用 kivy 的文件选择器,当有一个文件夹的文件具有希伯来文名称时,它会打印出乱码... 如果可能的话,我想支持不同的语言。 试图更改文件选择器中的字体名称,但对我不起作用。 你能帮我找出我做错了什么吗?

不仅是FileChooser - Kivy 中所有Label 的实例都默认使用Roboto 字体,这似乎不支持Unicode 字符。试试 运行 这个代码:

from kivy.app import App
from kivy.uix.label import Label


class TestApp(App):
    def build(self):
        return Label(text="עִבְרִית‎")


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

Kivy 附带 several fonts 个,其中之一是 DejaVuSans。让我们使用它:

from kivy.app import App
from kivy.uix.label import Label


class TestApp(App):
    def build(self):
        return Label(text="עִבְרִית‎", font_name='DejaVuSans.ttf')


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

现在希伯来语可以正确显示了。不过,它不适用于日语。对于该语言,您必须寻找另一种 Unicode 字体,将其放在目录中并传递给 font_name 属性.

无论如何。如何让 FileChooser 使用不同的字体?最简单的方法是将方法绑定到 on_entry_added 事件以更改目录树中新创建项目的属性:

from kivy.app import App
from kivy.clock import Clock
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout


Builder.load_string("""
<MyWidget>:
    FileChooserListView
        id: filechooser
""")

class MyWidget(BoxLayout):
    def __init__(self, *args):
        Clock.schedule_once(self.update_filechooser_font, 0)
        return super().__init__(*args)

    def update_filechooser_font(self, *args):
        fc = self.ids['filechooser']
        fc.bind(on_entry_added=self.update_file_list_entry)
        fc.bind(on_subentry_to_entry=self.update_file_list_entry)    

    def update_file_list_entry(self, file_chooser, file_list_entry, *args):
        file_list_entry.ids['filename'].font_name = 'DejaVuSans.ttf'


class MyApp(App):
    def build(self):
        return MyWidget()


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

这是我的解决方案。一半的功劳归于 Nykakin:

from kivy.app import App
from kivy.clock import Clock
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout


Builder.load_string("""
<MyWidget>:
    FileChooserListView
        id: filechooser
""")

class MyWidget(BoxLayout):
    def __init__(self, *args):
        Clock.schedule_once(self.update_filechooser_font, 0)
        return super(MyWidget, self).__init__(*args)

    def update_filechooser_font(self, *args):
        fc = self.ids.filechooser
        fc.bind(on_entry_added=self.update_file_list_entry)
        fc.bind(on_subentry_to_entry=self.update_file_list_entry)    


    def update_file_list_entry(self, file_chooser, file_list_entry, *args):
        file_list_entry.ids.filename.font_name = 'DejaVuSans.ttf'

        updated_text = []
        # to count where to insert the english letters
        english_counter = 0

        # the next statements used to split the name to name, extention
        splitted = file_list_entry.ids.filename.text.split('.')
        extention = ''
        if len(splitted) > 2:
            name = '.'.join(splitted)
        elif len(splitted) == 2:
            name = splitted[0]
            extention = splitted[1]
        else:
            name = '.'.join(splitted)

        # for each char in the reversed name (extention is always English and need to not be reversed)
        for char in name[::-1]:
            # if its in Hebrew append it regularly (reversed) and make sure to zero the counter
            if u"\u0590" <= char <= u"\u05EA":
                updated_text.append(char)
                english_counter = 0
            # if its an English character append it before the last english word (to un-reverse it) and increase the counter
            else:
                updated_text.insert(len(updated_text) - english_counter, char)
                english_counter += 1

        # add the extention in the end if exists
        if extention == '':
            file_list_entry.ids.filename.text = ''.join(updated_text)
        else:
            file_list_entry.ids.filename.text = ''.join(updated_text) + '.' + extention


class MyApp(App):
    def build(self):
        return MyWidget()


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