Python，基维。文本输入千位分隔符

Question

我需要 thousands separator（例如：1 000 000）在 kivy TextInput 中以提高打字时的可读性。

编辑：这是一个简短的示例，其中 label 显示 space 分隔符，我在输入时需要在 TextInput 中得到相同的结果。我想我必须在 MyTextInput class 中使用过滤，但我真的不知道从哪里开始。你能帮我解决这个问题吗？

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.textinput import TextInput
from kivy.properties import ObjectProperty
from kivy.uix.floatlayout import FloatLayout

Builder.load_string("""
<Calc>:
    first_num:first_num 
    second_num:second_num
    result:result
    
    MyTextInput:
        id: first_num      
        size_hint: 0.3, 0.2
        pos_hint: {"center_x": 0.2, "y": 0.7}
    
    MyTextInput:
        id: second_num       
        size_hint: 0.3, 0.2
        pos_hint: {"center_x": 0.8, "y": 0.7}       
    
    Button:
        text: "R E S U L T"
        
        on_release:
            root.multiplication()
        
        size_hint: 0.3, 0.2
        pos_hint: {"center_x": 0.5, "y": 0.4}
    
    Label:
        id: result       
        
        size_hint: 0.4, 0.2
        pos_hint: {"center_x": 0.5, "y": 0.2}        

    """
)

class MyTextInput(TextInput):
    input_filter = ObjectProperty('int', allownone=True)


class Calc(FloatLayout):
    first_num = ObjectProperty()
    second_num = ObjectProperty()
    result = ObjectProperty()

    def multiplication(self):
        x = int(self.first_num.text)
        y = int(self.second_num.text)

        self.result.text = '{:,}'.format(int(x*y)).replace(",", " ")


class myApp(App):
    def build(self):
        return Calc()

myApp().run()

Answer 1

您可以覆盖 TextInput 对象的 insert_text 方法以获得预期结果，

class MyTextInput(TextInput):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.input_filter = 'int' # Set value using the default property.


    def insert_text(self, substring, from_undo = False):
        # Override this super-class method.
        if not substring.isdigit(): # Eliminates non digit character.
            return
        else:
            cc, cr = self.cursor
            text = self._lines[cr]
            new_text = text[:cc] + substring + text[cc:]
            int_str = new_text.replace(" ", "") # Removing any inbetween space.
            new_text = '{:,d}'.format(int(int_str)).replace(",", " ") # Here insert seperator.
            super().insert_text(substring, from_undo = from_undo)

            self._set_line_text(cr, new_text) # Super-class method.
            Clock.schedule_once(lambda dt : setattr(self, "cursor", (cc+2, cr))) # Advances the cursor.

此外，您还需要对方法进行一些修改 multiplication。

    def multiplication(self):
        # First remove any inbetween space.
        num_text_1 = self.first_num.text.replace(" ", "")
        num_text_2 = self.second_num.text.replace(" ", "")
        if num_text_1 and num_text_2: # Non empty values.
            x = int(num_text_1)
            y = int(num_text_2)

            self.result.text = '{:,}'.format(int(x*y)).replace(",", " ")
        else:
            self.result.text = "" # Or, any other message.

Python，基维。文本输入千位分隔符

Python, Kivy. Textinput thousands separator

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