如何通过单击按钮更新kivy中应用程序的标题
How to update the title of an App in kivy by clicking a button
我想更改主应用程序屏幕（AwesomeApp）的标题。
我的App运行时的标题是“我家”。
但是我想在单击“信息”弹出窗口中的“更新顶部栏的名称”时更改它 window。
当我单击“信息”弹出窗口中的“更新顶部栏的名称”按钮时 window，我想用 appName.text 更新主应用程序的标题。
（appName 是“信息”弹出窗口中 MDTextField 的 ID window）。
您可以在 MDTextField 中输入新的应用程序名称。
我尝试过的是，通过单击“更新顶部栏的名称”按钮，它将 appName.text 保存在一个文本文件中，然后终止该应用程序和 re-run 该应用程序。然后它加载保存的文本文件并读取新的应用程序名称并将其放入“def build（self）：”内的标题中。但我不想终止应用程序和 re-run 应用程序。不过，我没有在下面的这段代码中包含这个逻辑。
如果没有人能帮我更改 AwesomeApp 的主标题而不 re-run 宁这个程序，我将不胜感激。
此致，
python 文件
'''
from kivy.uix.widget import Widget
'''Setting the size of first window for program'''
from kivy.config import Config #another way of setting size of window
Config.set('graphics', 'width', '600') # from kivy.core.window import Window
Config.set('graphics', 'height', '750') # Window.size = ("600", "750")
from kivymd.app import MDApp
from kivy.lang import Builder
from kivy.factory import Factory
from kivy.uix.popup import Popup
from kivy.properties import ObjectProperty
Builder.load_file('new_window_popup.kv')
class Dex(Popup):
pass
class Remi(Popup):
pass
class Info(Popup):
def updateName(self):
# This is where I need a logic to change title of this App with self.appName.text
print(self.appName.text)
pass
class MyLayout(Widget):
pass
class AwesomeApp(MDApp):
def build(self):
self.title = "My house"
return MyLayout()
if __name__ == '__main__':
AwesomeApp().run()
'''
new_window_popup.kv 文件
'''
#:import Factory kivy.factory.Factory
#:import MDRaisedButton kivymd.uix.button
<Dex>:
auto_dismiss: False
size_hint: 1, 1
title: "Weight-Based Dose Calculator "
canvas.before:
Color:
rgba: (0,1,0,1)
Rectangle:
pos:self.pos
size:self.size
BoxLayout:
orientation: "vertical"
size:root.width, root.height
Label:
text: "Dex 1"
Button:
text: "Close"
font_size: 24
on_release: root.dismiss()
<Remi>:
auto_dismiss: False
size_hint: 1, 1
title: "Weight-Based Dose Calculator "
canvas.before:
Color:
rgba: (0,1,0,1)
Rectangle:
pos:self.pos
size:self.size
BoxLayout:
orientation: "vertical"
size:root.width, root.height
Label:
text: "Remi"
Button:
text: "Close"
font_size: 24
on_release: root.dismiss()
<Info>:
appName:appName
auto_dismiss: False
size_hint: 1, 1
title: "Change Info"
canvas.before:
Color:
rgba: (0,1,0,1)
Rectangle:
pos:self.pos
size:self.size
BoxLayout:
orientation: "vertical"
size:root.width, root.height
Label:
text: "What is your App name?"
BoxLayout:
orientation: "horizontal"
MDTextField:
id: appName
hint_text: "App Name"
color_mode: 'primary'
current_hint_text_color: 1,1,1,1
hint_text_color_focus: 1,1,1,.9
line_color_focus: 1,1,1,1
font_size: '25sp'
text_color_normal: 1,1,1,.9
text_color_focus: 0,0,1,.9
focus: True
write_tab: False
Button:
text: "Update Top Bar\'s name"
font_size: 24
size_hint: .8, .2
on_release: root.updateName()
Button:
text: "Close"
font_size: 24
on_release: root.dismiss()
<MyLayout>
MDBoxLayout:
orientation:"vertical"
size: root.width, root.height
MDRaisedButton:
text: "Dex"
font_size: 32
text_color: 0,0,0,.9
size_hint: 1,.5
on_press: Factory.Dex().open()
MDRaisedButton:
text: "Remi"
font_size: 32
size_hint: 1,.5
on_press: Factory.Remi().open()
MDRaisedButton:
text: "Information"
font_size: 32
size_hint: 1,.2
md_bg_color: 0.95,0.61,0.73,1
on_press: Factory.Info().open()
'''
如果您想在 kvlang 中更改它，您可以这样做，
...
BoxLayout:
orientation: "vertical"
size:root.width, root.height
Label:
# text: "What is your App name?"
text: "Your current App's name : "+app.title # I changed it just to display the title.
BoxLayout:
orientation: "horizontal"
MDTextField:
id: appName
hint_text: "App Name"
text: app.title
color_mode: 'primary'
current_hint_text_color: 1,1,1,1
hint_text_color_focus: 1,1,1,.9
line_color_focus: 1,1,1,1
font_size: '25sp'
text_color_normal: 1,1,1,.9
text_color_focus: 0,0,1,.9
focus: True
write_tab: False
Button:
text: "Update Top Bar\'s name"
font_size: 24
size_hint: .8, .2
on_release: app.title = appName.text
Button:
text: "Close"
font_size: 24
on_release: root.dismiss()
...
或者，从 python、
kvlang、
第一名
...
MDTextField:
id: appName
hint_text: "App Name"
text: app.title
color_mode: 'primary'
current_hint_text_color: 1,1,1,1
hint_text_color_focus: 1,1,1,.9
line_color_focus: 1,1,1,1
font_size: '25sp'
text_color_normal: 1,1,1,.9
text_color_focus: 0,0,1,.9
focus: True
write_tab: False
Button:
text: "Update Top Bar\'s name"
font_size: 24
size_hint: .8, .2
on_release: root.updateName(appName) # Pass the MDTextField instance.
...
然后在方法updateName
def updateName(self, t_field):
# Access the running App instance.
# Note that this happens to be very useful when you
# need to access the App from anywhere in your code.
app = MDApp.get_running_app()
# Change its title using the text of the t_field (that has been passed).
app.title = t_field.text
我想更改主应用程序屏幕（AwesomeApp）的标题。
我的App运行时的标题是“我家”。
但是我想在单击“信息”弹出窗口中的“更新顶部栏的名称”时更改它 window。
当我单击“信息”弹出窗口中的“更新顶部栏的名称”按钮时 window，我想用 appName.text 更新主应用程序的标题。 （appName 是“信息”弹出窗口中 MDTextField 的 ID window）。 您可以在 MDTextField 中输入新的应用程序名称。
我尝试过的是，通过单击“更新顶部栏的名称”按钮，它将 appName.text 保存在一个文本文件中，然后终止该应用程序和 re-run 该应用程序。然后它加载保存的文本文件并读取新的应用程序名称并将其放入“def build（self）：”内的标题中。但我不想终止应用程序和 re-run 应用程序。不过，我没有在下面的这段代码中包含这个逻辑。
如果没有人能帮我更改 AwesomeApp 的主标题而不 re-run 宁这个程序，我将不胜感激。
此致，
python 文件 '''
from kivy.uix.widget import Widget
'''Setting the size of first window for program'''
from kivy.config import Config #another way of setting size of window
Config.set('graphics', 'width', '600') # from kivy.core.window import Window
Config.set('graphics', 'height', '750') # Window.size = ("600", "750")
from kivymd.app import MDApp
from kivy.lang import Builder
from kivy.factory import Factory
from kivy.uix.popup import Popup
from kivy.properties import ObjectProperty
Builder.load_file('new_window_popup.kv')
class Dex(Popup):
pass
class Remi(Popup):
pass
class Info(Popup):
def updateName(self):
# This is where I need a logic to change title of this App with self.appName.text
print(self.appName.text)
pass
class MyLayout(Widget):
pass
class AwesomeApp(MDApp):
def build(self):
self.title = "My house"
return MyLayout()
if __name__ == '__main__':
AwesomeApp().run()
'''
new_window_popup.kv 文件
'''
#:import Factory kivy.factory.Factory
#:import MDRaisedButton kivymd.uix.button
<Dex>:
auto_dismiss: False
size_hint: 1, 1
title: "Weight-Based Dose Calculator "
canvas.before:
Color:
rgba: (0,1,0,1)
Rectangle:
pos:self.pos
size:self.size
BoxLayout:
orientation: "vertical"
size:root.width, root.height
Label:
text: "Dex 1"
Button:
text: "Close"
font_size: 24
on_release: root.dismiss()
<Remi>:
auto_dismiss: False
size_hint: 1, 1
title: "Weight-Based Dose Calculator "
canvas.before:
Color:
rgba: (0,1,0,1)
Rectangle:
pos:self.pos
size:self.size
BoxLayout:
orientation: "vertical"
size:root.width, root.height
Label:
text: "Remi"
Button:
text: "Close"
font_size: 24
on_release: root.dismiss()
<Info>:
appName:appName
auto_dismiss: False
size_hint: 1, 1
title: "Change Info"
canvas.before:
Color:
rgba: (0,1,0,1)
Rectangle:
pos:self.pos
size:self.size
BoxLayout:
orientation: "vertical"
size:root.width, root.height
Label:
text: "What is your App name?"
BoxLayout:
orientation: "horizontal"
MDTextField:
id: appName
hint_text: "App Name"
color_mode: 'primary'
current_hint_text_color: 1,1,1,1
hint_text_color_focus: 1,1,1,.9
line_color_focus: 1,1,1,1
font_size: '25sp'
text_color_normal: 1,1,1,.9
text_color_focus: 0,0,1,.9
focus: True
write_tab: False
Button:
text: "Update Top Bar\'s name"
font_size: 24
size_hint: .8, .2
on_release: root.updateName()
Button:
text: "Close"
font_size: 24
on_release: root.dismiss()
<MyLayout>
MDBoxLayout:
orientation:"vertical"
size: root.width, root.height
MDRaisedButton:
text: "Dex"
font_size: 32
text_color: 0,0,0,.9
size_hint: 1,.5
on_press: Factory.Dex().open()
MDRaisedButton:
text: "Remi"
font_size: 32
size_hint: 1,.5
on_press: Factory.Remi().open()
MDRaisedButton:
text: "Information"
font_size: 32
size_hint: 1,.2
md_bg_color: 0.95,0.61,0.73,1
on_press: Factory.Info().open()
'''
如果您想在 kvlang 中更改它，您可以这样做，
...
BoxLayout:
orientation: "vertical"
size:root.width, root.height
Label:
# text: "What is your App name?"
text: "Your current App's name : "+app.title # I changed it just to display the title.
BoxLayout:
orientation: "horizontal"
MDTextField:
id: appName
hint_text: "App Name"
text: app.title
color_mode: 'primary'
current_hint_text_color: 1,1,1,1
hint_text_color_focus: 1,1,1,.9
line_color_focus: 1,1,1,1
font_size: '25sp'
text_color_normal: 1,1,1,.9
text_color_focus: 0,0,1,.9
focus: True
write_tab: False
Button:
text: "Update Top Bar\'s name"
font_size: 24
size_hint: .8, .2
on_release: app.title = appName.text
Button:
text: "Close"
font_size: 24
on_release: root.dismiss()
...
或者，从 python、
kvlang、
...
MDTextField:
id: appName
hint_text: "App Name"
text: app.title
color_mode: 'primary'
current_hint_text_color: 1,1,1,1
hint_text_color_focus: 1,1,1,.9
line_color_focus: 1,1,1,1
font_size: '25sp'
text_color_normal: 1,1,1,.9
text_color_focus: 0,0,1,.9
focus: True
write_tab: False
Button:
text: "Update Top Bar\'s name"
font_size: 24
size_hint: .8, .2
on_release: root.updateName(appName) # Pass the MDTextField instance.
...
然后在方法updateName
def updateName(self, t_field):
# Access the running App instance.
# Note that this happens to be very useful when you
# need to access the App from anywhere in your code.
app = MDApp.get_running_app()
# Change its title using the text of the t_field (that has been passed).
app.title = t_field.text