python - 在 Kivy 中更改窗口大小时如何更改小部件的大小？

问题描述

我是一个尝试做计算器的python初学者。我需要帮助解决一个问题。当我运行应用程序并通过拖动鼠标调整窗口大小时，小部件不会调整到窗口的大小并且位于窗口的末尾。我试图返回 FloatLayout 而不是 KalkulackaLayout 类，它以我想要的方式工作。但是当我返回类 KalkulackaLayout 时，它不起作用，我需要返回这个类。

蟒蛇文件：

from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button
from kivy.uix.widget import Widget

class KalkulackaLayout(Widget):
    def button_cislo(self, cislo):
        pred = self.ids.kalkulacka_input.text

        if pred == "0":
            self.ids.kalkulacka_input.text = ""
            self.ids.kalkulacka_input.text = f"{cislo}"

        else:
            self.ids.kalkulacka_input.text = f"{pred}{cislo}"

    def znamenko(self, znamenko):
        pred = self.ids.kalkulacka_input.text
        self.ids.kalkulacka_input.text = f"{pred}{znamenko}"

    def vymazat(self):
        self.ids.kalkulacka_input.text = ""

    def vypocitej(self):
        pred = self.ids.kalkulacka_input.text
        try:
            vysledek = eval(pred)
            self.ids.kalkulacka_input.text = str(vysledek)
        except:
            self.ids.kalkulacka_input.text = "ERROR!"

    pass

class Kalkulacka(App):
    def build(self):
        return KalkulackaLayout()

if __name__=="__main__":
    Kalkulacka().run()

.kv 文件：

<KalkulackaLayout>
    FloatLayout:
        size:300,300
        Button:
            text: "1"
            size_hint:0.5,0.5
            pos_hint: {"bottom":0.1}
            on_press: root.button_cislo(1)

        Button:
            text: "2"
            size_hint:0.5,0.5
            pos_hint:{"right": 1, "bottom": 0.1}
            on_press: root.button_cislo(2)

        Button:
            text: "3"
            size_hint:0.5,0.5
            pos_hint:{"right": 1.5, "bottom": 0.1}
            on_press: root.button_cislo(3)

        Button:
            text: "÷"
            size_hint:0.5,0.5
            pos_hint:{"right": 2, "bottom": 0.1}
            on_press: root.znamenko("/")

        Button:
            text: "-"
            size_hint:0.5,0.5
            pos_hint:{"right": 2.5, "bottom": 0.1}
            on_press: root.znamenko("-")

        Button:
            text: "4"
            size_hint:0.5,0.5
            pos_hint:{"top": 1}
            on_press: root.button_cislo(4)

        Button:
            text: "5"
            size_hint:0.5,0.5
            pos_hint:{"right": 1, "top": 1}
            on_press: root.button_cislo(5)

        Button:
            text: "6"
            size_hint:0.5,0.5
            pos_hint:{"right": 1.5, "top": 1}
            on_press: root.button_cislo(6)

        Button:
            text: "x"
            size_hint:0.5,0.5
            pos_hint:{"right": 2, "top": 1}
            on_press: root.znamenko("*")

        Button:
            text: "+"
            size_hint:0.5,0.5
            pos_hint:{"right": 2.5, "top": 1}
            on_press: root.znamenko("+")

        Button:
            text: "7"
            size_hint:0.5,0.5
            pos_hint:{"top": 1.5}
            on_press: root.button_cislo(7)

        Button:
            text: "8"
            size_hint:0.5,0.5
            pos_hint:{"right": 1, "top": 1.5}
            on_press: root.button_cislo(8)

        Button:
            text: "9"
            size_hint:0.5,0.5
            pos_hint:{"right": 1.5, "top": 1.5}
            on_press: root.button_cislo(9)

        Button:
            text: "="
            size_hint:0.5,0.5
            pos_hint:{"right": 2, "top": 1.5}
            on_press: root.vypocitej()

        Button:
            text: "C"
            size_hint:0.5,0.5
            pos_hint:{"right": 2.5, "top": 1.5}
            on_press: root.vymazat()

        TextInput:
            text: ""
            size_hint: 2.667,0.25
            font_size: 60
            pos_hint: {"top":2, "right":2.667}
            id: kalkulacka_input

标签： pythonkivy

python - 在 Kivy 中更改窗口大小时如何更改小部件的大小？

问题描述

解决方案

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