Kivy Python TextInput显示冒泡

Question

我正在尝试在Kivy中为TextInput在气泡中显示数字键盘。可能吗？ 到目前为止，我有：

Builder.load_string('''
<NumericKeyboard>
size_hint: (None, None)
size: (160, 120)
pos_hint: {'center_x': .5, 'y': .6}
BubbleButton:
    text: 'Cut'
BubbleButton:
    text: 'Copy'
BubbleButton:
    text: 'Paste'
''')

class NumericKeyboard(Bubble):
    pass

class CustomTextInput(TextInput):
def __init__(self, **kwargs):
    super(CustomTextInput, self).__init__(**kwargs)

def on_focus(self, instance, value):
    self.bubb = NumericKeyboard()
    self.add_widget(self.bubb)

但气泡不会显示。

Answer 1

感谢@ikolim 代码和解释，我做了一些改进并与您分享。

1. 替换了kivy提供的图片背景
2. canvas 和 padding 指定，制作圆角矩形外观
3. 记住：客户widget添加到Bubble Widget中，Bubble Widget必须添加到FloatLayout中
4. 代码运行在win10-64,kivy2.0.0,py366（如有问题请稍作修改）bubble_arrow_up.png Show resultsbubble_down.png delete.png

mycalculate.py

# !/usr/bin/env python  
# -*- coding: utf-8 -*- 
from functools import partial

from kivy.app import App
from kivy.core.window import Window
from kivy.core.text import LabelBase
from kivy.uix.bubble import Bubble, BubbleButton
from kivy.properties import ObjectProperty
from kivy.uix.boxlayout import BoxLayout


class NumBubbleButton(BubbleButton):
    pass


class Calculate(Bubble):
    content = ObjectProperty("")

    def __init__(self, **kwargs):
        super(Calculate, self).__init__(**kwargs)
        self.create_keyboard()

    def create_keyboard(self):
        num_key = ['7', '8', '9', '4', '5', '6', '1', '2', '3', ' ', '0', '⌫']
        for x in num_key:
            btn = NumBubbleButton(text=str(x))
            btn.bind(on_press=partial(self.add_text, str(x)))
            if x == " ":
                btn.disabled = True
                btn.background_disabled_normal = ""
            elif x == "⌫":
                btn.text = ""
                btn.background_normal = "delete.png"
            self.ids.calculator.add_widget(btn)
    @staticmethod
    def add_text(text, *args):
        print(text)

class Cale(BoxLayout):
    def __init__(self, **kwargs):
        super(Cale, self).__init__(**kwargs)

        self.cale = Calculate()
        self.cale.width, self.cale.height = 200, 400
        self.ids.float_grid.add_widget(self.cale)

class MyCalculateApp(App):
    def __init__(self, **kwargs):
        super(MyCalculateApp, self).__init__(**kwargs)

    def build(self):
        # Window.fullscreen = False
        # Window.left, Window.top, Window.size = 10, 0, (300, 500)
        return Cale()

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

mycalculate.kv

<NumBubbleButton>:
    background_normal: ""
    background_color: 1, 1, 1, 1
    color: 0, 0, 0, 1
    bold: True
    font_size: "48px"
<Calculate>:
    size_hint: None, None
    orientation: "vertical"
    arrow_image: "bubble_arrow_up.png"
    background_image: "bubble_down.png"
    arrow_pos: "top_mid"


    BoxLayout:
        padding: 5, 5, 5, 0
        size_hint: 1, 1

        GridLayout:
            id: calculator
            canvas:
                Color:
                    rgba: 232/255, 232/255, 232/255, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            spacing: 2
            rows: 5
            cols: 3
    BoxLayout:
        size_hint: 1, 0.2
        padding: 5
        canvas.before:
            Color:
                rgba: 199/255, 31/255, 58/255, 1
            RoundedRectangle:
                pos: self.pos
                size: self.size
                radius: [0, 0, 10, 10]
        Button:
            background_normal: ""
            background_color: 199/255, 31/255, 58/255, 1
            font_size: "32px"
            text: t.t("Confirm")
            markup: True
            on_press: print("Confirm")
<Cale>:
    FloatLayout:
        id: float_grid
        GridLayout:
            id: grid_goods

Answer 2

您无法将小部件添加到文本输入中，因为它不是布局。您应该将文本输入添加到布局，然后将气泡添加到此布局。试试这个：

from kivy.app import App
from kivy.uix.bubble import Bubble
from kivy.uix.textinput import TextInput
from kivy.lang import Builder
from kivy.uix.floatlayout import FloatLayout

Builder.load_string('''
<NumericKeyboard>
    size_hint: (None, None)
    size: (160, 120)
    pos_hint: {'center_x': .5, 'y': .6}
    BubbleButton:
        text: 'Cut'
    BubbleButton:
        text: 'Copy'
    BubbleButton:
        text: 'Paste'
''')

class NumericKeyboard(Bubble):
    pass


class CustomTextInputLayout(FloatLayout):
    def __init__(self, **kwargs):
        super(CustomTextInputLayout, self).__init__(**kwargs)
        self.add_widget(CustomTextInput(self))


class CustomTextInput(TextInput):
    def __init__(self, layout,**kwargs):
        super(CustomTextInput, self).__init__(**kwargs)
        self.layout = layout

    def on_focus(self, instance, value):
        self.bubb = NumericKeyboard()
        self.layout.add_widget(self.bubb)

class MyTestApp(App):
    def build(self):
        return CustomTextInputLayout()

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

Answer 3

是的，可以使用Kivy Bubble for TextInput小部件显示数字键盘。有关详细信息，请参阅以下示例。

注意： 不会过滤文字输入。

实施例

main.py

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.bubble import Bubble, BubbleButton
from kivy.uix.label import Label
from kivy.properties import ObjectProperty
from kivy.lang import Builder


class CustomBubbleButton(BubbleButton):
    pass


class NumericKeyboard(Bubble):
    layout = ObjectProperty(None)

    def __init__(self, **kwargs):
        super(NumericKeyboard, self).__init__(**kwargs)
        self.create_bubble_button()

    def create_bubble_button(self):
        numeric_keypad = ['7', '8', '9', '4', '5', '6', '1', '2', '3', '', '0', '.']
        for x in numeric_keypad:
            if len(x) == 0:
                self.layout.add_widget(Label(text=""))
            else:
                bubb_btn = CustomBubbleButton(text=str(x))
                self.layout.add_widget(bubb_btn)


class BubbleShowcase(FloatLayout):
    text_input = ObjectProperty(None)

    def show_bubble(self, *l):
        if not hasattr(self, 'bubb'):
            self.bubb = bubb = NumericKeyboard()
            self.bubb.arrow_pos = "bottom_mid"
            self.add_widget(bubb)


Builder.load_file("test.kv")


class TestBubbleApp(App):
    title = "Numeric Key Pad - Using Bubble"

    def build(self):
        return BubbleShowcase()


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

test.kv

#:kivy 1.10.0

<CustomBubbleButton>:
    on_release:
        app.root.text_input.text += self.text


<NumericKeyboard>:
    layout: layout

    size_hint: (None, None)
    size: (160, 120)
    pos_hint: {'center_x': .5, 'y': .6}

    GridLayout:
        id: layout
        cols: 3

<BubbleShowcase>:
    text_input: text_input

    canvas:
        Color:
            rgba: 0, 1, 1, 1
        Rectangle:
            size: self.width, self.height
    TextInput:
        id: text_input
        pos_hint: {'center_x': .5, 'y': .54}
        size_hint: (0.2, 0.06)
        cursor_blink: True
        font_size: 20
        multiline: False
        on_focus:
            root.show_bubble()

输出