[英]Is there a focus lost event dispatcher for a kivy TextInput?
如果multiline = True TextInput
失去了焦点,是否有办法触发事件?
我已经尝试过on_touch_up
函数。 但是它返回所有TextInputs
的实例,而不仅仅是当前的小部件。 我尝试了text_validate_unfocus = False
,结果相同。
import kivy
kivy.require("1.10.1")
from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import ObjectProperty, NumericProperty
from kivy.uix.textinput import TextInput
from kivy.uix.bubble import Bubble
from kivy.lang import Builder
from kivy.storage.jsonstore import JsonStore
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: ''
foreground_color: (0,0.61,0.36,1) if self.focus else (0.71,0.75,0.71,1)
unfocus_on_touch: False
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:
color: (0,0,0,1)
pos_hint: {'top': 1, 'right': 0.9}
size_hint: [0.1, None]
height: Window.height / 15
Image:
source: 'gear_2.png'
center_y: self.parent.center_y
center_x: self.parent.center_x
size: self.parent.width /1.5, self.parent.height/ 1.5
allow_stretch: True
Button:
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()
Image:
source: 'plus_text12354.png'
center_y: self.parent.center_y
center_x: self.parent.center_x
size: self.parent.width /1.5, self.parent.height/ 1.5
allow_stretch: True
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 TextInput(TextInput):
got_txt = ObjectProperty(None)
def on_touch_up(self, touch):
if not self.collide_point(*touch.pos):
self.text_validate_unfocus = False
note = Notation()
note.show_bubble
self.got_txt=note.que_txt_input(self)
return super(TextInput, self).on_touch_up(touch)
class Notation(FloatLayout):
which_txt = ObjectProperty(None)
new_txt = ObjectProperty(None)
cnt = NumericProperty(0)
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.the_file=JsonStore('txt_input.json')
self.cnt = self.the_file.count()
lst = self.the_file.keys
def add_input(self):
txt_hld = self.ids.text_holder
self.cnt += 1
self.new_txt = TextInput(id=str(self.cnt))
self.the_file.put(str(self.cnt), the_id=str(self.cnt), the_input='')
txt_hld.add_widget(self.new_txt)
def que_txt_input(self, instance):
self.which_txt = instance
print(instance.text, instance)
return instance
def del_txt_input(self):
print(self.which_txt)
def the_file(self, notestore):
self.notestore = notestore
def show_bubble(self):
self.add_widget(ChoiceBubble())
def get_store(self):
the_keys = list(self.the_file.keys)
print(the_keys)
return the_keys
class theNoteApp(App):
title = 'My Notes'
def build(self):
return Notation()
if __name__ == '__main__':
theNoteApp().run()
一旦失去焦点,我希望将气泡widget
添加到root class
的顶部。 这将使用户可以选择将刚刚失去焦点的TextInput
id和文本保存,加密或删除到JSON
文件中。
Notation
多个实例。 每当on_touch_up
事件时,一个方法都来自App
类的build()
方法( return Notation()
),另一个是on_touch_up()
方法创建的另一个实例( note = Notation()
)。 在on_touch_up()
方法中创建的那些实例没有可见的视图,即它不会显示在窗口中。 AttributeError: 'ChoiceBubble' object has no attribute 'del_txt_input'
ChoiceBubble
文本不可见,即默认的文本颜色是白色背景上的白色。 App.get_running_app().root
获取实例化的根。 root.del_txt_input()
替换app.root.del_txt_input()
color: 0, 0, 0, 1
添加到类别规则<Label>:
on_focus
事件显示BubbleButton
<Label>:
color: 0, 0, 0, 1
...
<ChoiceBubble>:
...
BubbleButton:
text: 'Delete'
on_release: app.root.del_txt_input()
class TextInput(TextInput):
got_txt = ObjectProperty(None)
def on_focus(self, instance, value):
if not value: # defocused
note = App.get_running_app().root
note.show_bubble()
self.got_txt = note.que_txt_input(self)
当焦点布尔值更改时,将触发on_focus
事件。
我已经尝试过on_touch_up函数。 但是它返回我所有TextInput的实例,而不仅仅是当前的小部件。
这是因为您没有编写任何代码来将其限制为您关注的窗口小部件,因此可以根据需要执行此操作。
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