Why is it that setting TextInput focus equal to True, makes TextInput not respond to keyboard input?

Question

Background:

I have a button that adds TextInput widgets to a GridLayout with focus: True. If a TextInput is already present in the layout with focus = True, the previous TextInput is firstly unfocused then a new TextInput is added with focus = True.

Problem:

Once a TextInput is added I cannot type even though the cursor is focused on the added TextInput. Secondary problem is when an user clicks on another widget the TextInput stays focused. Meaning an unfocus event cannot be fired.

Tried:

I removed setting the focus explicitly, but then the desired result to start typing after adding a TextInput is lost. Secondary I tried setting unfocus_on_touch = True, but the TextInput stayed focused even after user left the TextInput.

Code:

import kivy
kivy.require("1.10.1")

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

Builder.load_string('''
#: import Window kivy.core.window.Window
<Button>:
    background_normal: ''
<Label>:
    canvas.before:
        Color:
            rgba: (0,0.59,0.36,1)
        Rectangle:
            pos: self.pos
            size: self.size
<TextInput>:
    hint_text: 'Nuwe nota'
    font_size: self.height / 4.5 if self.focus else self.height / 3
    background_normal: ''
    background_active: ''
    focus: True
    foreground_color: (0,0.61,0.36,1) if self.focus else (0.71,0.75,0.71,1)
    canvas.after:
        Color:
            rgb: (0,0,0,1)
        Line:
            points: self.pos[0] , self.pos[1], self.pos[0] + self.size[0], self.pos[1]
    size_hint_y: None
    height: Window.height / 6 if self.focus else Window.height / 12
<ChoiceBubble>:
    orientation: 'horizontal'
    size_hint: (None, None)
    size: (160, 120)
    pos_hint: {'top': 0.2, 'right': 0.8}
    arrow_pos: 'top_left'
    BubbleButton:
        text: 'Save'
    BubbleButton:
        text: 'Encrypt..'
    BubbleButton:
        text: 'Delete'
        on_release: root.del_txt_input()
<Notation>:
    canvas:
        Color:
            rgba: (0,0.43,0.37,1)
        Rectangle:
            pos: self.pos
            size: self.size
    Label:
        pos_hint: {'top': 1, 'right': 0.8}
        size_hint: [0.8, None]
        height: Window.height / 15
    Button:
        text: 'Set'
        color: (0,0,0,1)
        pos_hint: {'top': 1, 'right': 0.9}
        size_hint: [0.1, None]
        height: Window.height / 15

    Button:
        text: '+ Plus'
        color: (0,0,0,1)
        pos_hint: {'top': 1, 'right': 1}
        size_hint: [0.1, None]
        height: Window.height / 15
        on_release: root.add_input()
    ScrollView:
        size_hint_y: None
        size: Window.width, Window.height
        pos_hint: {'top': 0.92, 'right': 1}
        GridLayout:
            id: text_holder
            cols: 1
            pos_hint: {'top': 0.92, 'right': 1}
            padding: 4
            size_hint_x: 1
            size_hint_y: None
            height: self.minimum_height

''')
class ChoiceBubble(Bubble):
    pass
class Notation(FloatLayout):
    which_txt = ObjectProperty(None)
    new_txt = ObjectProperty(None)
    def add_input(self):
        txt_hld = self.ids.text_holder
        if self.new_txt == None:
            self.new_txt = TextInput()
            txt_hld.add_widget(self.new_txt)
        else:
            self.new_txt.focus = False
            print(self.new_txt.focus)
            self.new_txt = TextInput(focus = True)
            print(self.new_txt.focus)
            txt_hld.add_widget(self.new_txt)
    def que_txt_input(self, instance):
        self.which_txt = instance
        print(instance)
    def del_txt_input(self):
        print(self.which_txt)

class theNoteApp(App):
    title = 'My Notes'
    def build(self):
        return Notation()

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

Desired Result:

I want to start typing after adding a new TextInput and after clicking in another widget I want the TextInput to loose focus and fire a unfocus_on_touch event?

Answer 1

前段时间我遇到了同样的问题，我在kivy的github页面上打开了一个issue。 尚无解决方案，但有解决方法。 您必须将这些行添加到您的TextInput规则中：

keyboard_mode: 'managed'
keyboard_on_key_down: self.show_keyboard()

此后，它开始工作，但是通过添加widgets的方式，您始终将精力集中在所有这些对象上，因此您必须独立解决此问题。
您唯一需要关注的是您的TextInput规则，无处不在。