I’d like to change the title of the main App screen(AwesomeApp).
The title of my App when it runs is “My house”.
But i want to change it when I click “Update Top Bar’s name” inside “Information” popup window.
When i click “Update Top Bar’s name” button inside “Information” Popup window, I want to update the title of main App with appName.text. (appName is the id of MDTextField inside “Information” popup window). You can input a new app name into MDTextField.
What i have tried is that By clicking “Update Top Bar’s name” button, it saves appName.text in a text file and then Kill the App and re-run the app. then it loades the saved text file and read and put the new app name into the title inside “def build(self):”. But i don’t want to kill the app and re-run the app. I have not included this logic in this code below though.
If anyone could help me to change AwesomeApp’s main title without re-running this program, I would greatly appreciate it.
Regards,
python file ”’
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 file
”’
#: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()
”’
Advertisement
Answer
If you want to change it in kvlang you can do it as,
...
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()
...
Or, from python,
First in 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.
...
Then in method 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