Develop Reference

KivyMD MDRectangleFlatIconButton's text is in two lines when text is updated with a long text

I want to update MDRectangleFlatIconButton's text. It changes with a new text but when the new text is longer than previous text, then the text fits in two lines.
When i use a normal button, the new text fits in one line with proper adjustment.
but Since there is a Icon in MDRectangleFlatIconButton, when a new text is longer than previous text, the text fits in a two line.
To run the program,
Add a new app name which is longer than "Info" inside "Info" button's popup window, then click "Update Top Bar's name". Then, it updated title and the text of "Info" button at the front main App.
I have tried to change this by adding button's text_size: self.width, valign:"center", haling: "center", or manually adding text_size: cm(10), cm(10).
Also, i tried with on_release: "app.root.ids.bt_information.text_size = self.width, None
but nothing works so far.
I greatly appreciate your help.
Python code
'''
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):
pass
class MyLayout(Widget):
pass
class AwesomeApp(MDApp):
def build(self):
self.title = "My house"
return MyLayout()
if __name__ == '__main__':
AwesomeApp().run()
'''
kivyfile: new_window_popup.kv
'''
#: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()
on_release:
app.title = appName.text
app.root.ids.bt_information.text = appName.text
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()
MDRectangleFlatIconButton:
id: bt_information
text: "Info"
icon: "youtube-studio"
font_size: 32
size_hint: 1,.2
text_size: self.width, None
md_bg_color: 0.95,0.61,0.73,1
on_press: Factory.Info().open()
'''

Widgets Position not Fixed in APK file

I am new to kivy and i am very confuse to set the position of the widgets for mobile apllication
As i am using default size of the desktop window screen, In that widgets position look goods and in a proper allignment
i have attached PNG file of window screen and mobile screen
but when i use this in android apk file and installed in mobile, then all position of widgest are messed up and not looks to good for visibillity
so how to adjust the size and postion of widgets for android apk file
from kivymd.app import MDApp
from kivy.lang import Builder
from kivymd.uix.screen import MDScreen
from kivy.uix.screenmanager import ScreenManager
KV = ('''
<LOGIN_Window>:
name: 'login_window1'
FloatLayout:
MDToolbar:
title: 'permit me'
elevation: 10
pos_hint: {"left": 1, "top": 1}
MDLabel:
text: 'Welcome to permit me'
font_size: '35sp'
size: self.size
pos: self.pos
pos_hint: {'x': 0.21, 'y': 0.65}
size_hint_y: '0.35dp'
size_hint_x: '0.50dp'
BoxLayout:
orientation: 'vertical'
pos_hint: {'x': .25, 'y': 0.65}
size_hint: None, None
size_hint: '0.6dp', '0.08dp'
MDLabel:
text: 'Email-ID'
font_size: '15sp'
height: self.texture_size[1] + dp(10)
MDTextFieldRound:
id: login
hint_text: 'For Eg:- XXY...#gmail.com'
icon_left: "email"
input_type: 'text'
MDBoxLayout:
orientation: 'horizontal'
pos_hint: {'x':.25, 'y':4}
spacing: '50dp'
MDFillRoundFlatButton:
id: logIn
text: 'Login'
MDFillRoundFlatButton:
text: 'Register'
MDLabel:
text:'Powered By Technology'
pos_hint : {'x': 0,'y': 0}
size_hint_y: None
height: self.texture_size[1] + dp(10)
WindowManager:
LOGIN_Window:
'''
)
class LOGIN_Window(MDScreen):
pass
class WindowManager(ScreenManager):
pass
class MainApp(MDApp):
def build(self):
return Builder.load_string(KV)
if __name__ == '__main__':
MainApp().run()

Kivy - Referencing IDs of Subclasses (Nested IDs)

I'm creating a kivy app right now. I'm quite new to Kivy and kv lang and there doesn't seam to be much rumour about it although i find it great to seperate code logic and layout, especially after some pygame development.
So to my actuall problem: I have a wiki-style screen for screenmanager, consisting out of a BoxLayout:
Title as Label
Scrollable Label for the Text (later , there shall be displayed a nested kv file)
Buttons for Navigation (scroll up and go back to main screen)
Now I'm recreating the Navigation buttons to be floating type as known from many webpages and apps. Problem is, I suddendly cant reference my ScrollView anymore. Any help or suggestions?
<Wiki>:
name: "wiki"
canvas.before:
Rectangle:
pos: self.pos
size: self.size
source: "picture.jpg"
BoxLayout:
id: box
orientation: "vertical"
padding: 10
spacing: 10
Label:
font_size: 20
size_hint_y: .1
text: root.country_text
ScrollView:
id: scrlvw
BackgroundLabel:
background_color: 220,220,220, 0.5
size_hint_y: None
text_size: self.width, None
height: self.texture_size[1]
halign: "left"
valign: "top"
text: root.wiki_text
FloatLayout:
size_hint_y: .1
Button:
size_hint_x: .2
pos_hint: {"center_x": .25, "center_y": .5}
text: "Back"
on_release:
app.root.current = "main"
root.manager.transition.direction = "right"
FloatButton:
size_hint_x: .2
pos_hint: {"center_x": .75, "center_y": .5}
text: "Up"
on_release:
widget = BoxLayout()
widget.ids.scrlvw.scroll_y = 0
Before, when it worked, it was:
BoxLayout:
FloatLayout:
size_hint_y: .1
Button:
size_hint_x: .2
pos_hint: {"center_x": .25, "center_y": .5}
text: "Back"
on_release:
app.root.current = "main"
root.manager.transition.direction = "right"
Button:
size_hint_x: .2
pos_hint: {"center_x": .75, "center_y": .5}
text: "Up"
on_release:
scrlvw.scroll_y = 0
Well as its just a design question, I guess i temporary have to dismiss the floating design. But I would be so pleased if you could help me understand this language better.

As long as the 'kv' code described as "when it worked" is still in the same <Wiki> rule, it should still work. The newer kv code will never work as you are trying to create a new BoxLayout and reference an id in it. That has two problems:
The newly created BoxLayout is not the BoxLayout instance that appears in your GUI, so any changes to it will have no effect on what appears in the display.
Unless you have a <BoxLayout> rule in your kv, the newly created BoxLayout will not have a scrlvw id.
The ids defined within a kv rule are available for use only within that rule. See the documntation.

kivymd text field stills shows the hint_text in the field after typing

I am having trouble with MDTextField. It carries on displaying the hint inside the textfield while typing. I have tried setting the background color to hide it but that didn't work. I have looked at a few tutorials and everyone seems to be doing it the same way as me and it just works for other people so i feel i have done something really wrong.
Image of what happens this is my first post so i am not aloud to post images :)
Any help will be greatly appreciated. Thanks in advance.
main.py
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.core.window import Windowfrom kivy.config import Config
from kivy.uix.screenmanager import ScreenManager, Screen
from kivymd.theming import ThemeManager
from kivy.lang import Builder
from kivymd.app import MDApp
from kivy.graphics import Rectangle, Color
import pymysql
class WelcomeScreen(Screen):
pass
class LoginScreen(Screen):
pass
class RegisterScreen(Screen):
pass
class WindowManager(ScreenManager):
pass
class MainApp(MDApp):
def build(self):
# theme_cls = ThemeManager()
return Builder.load_file("main.kv")
def change_screen(self, screen, direction):
self.root.transition.direction = direction
self.root.current = screen
if __name__ == "__main__":
MainApp().run()
main.kv
#: import Window kivy.core.window.Window
#: import MDLabel kivymd.uix.label.MDLabel
#: import Rectangle kivy.graphics.Rectangle
#: import Color kivy.graphics.Rectangle
WindowManager:
WelcomeScreen:
LoginScreen:
RegisterScreen:
<WelcomeScreen>:
name: "welcome_screen"
FloatLayout:
orientation: "vertical"
MDToolbar:
id: toolbar
title: "SecureIT 24/7"
pos_hint: {'top': 1}
Button:
text: 'Login'
color: 1, 1, 1, 1
size_hint: 0.25, 0.25
pos_hint: {"right":0.625, "top":0.80}
on_release:
app.root.current = "login_screen"
Button:
text: 'Register'
color: 1,1,1,1
size_hint: 0.25, 0.25
pos_hint: {"right":0.625, "top":0.55 }
on_release:
app.root.current = "register_screen"
<LoginScreen>:
name: "login_screen"
FloatLayout:
MDBanner:
id: banner
text: "Login"
# The widget that is under the banner.
# It will be shifted down to the height of the banner.
MDToolbar:
id: toolbar
title: "Login"
elevation: 10
pos_hint: {'top': 1}
left_action_items: [['arrow-left', lambda screen: app.change_screen('welcome_screen', 'right')]]
FloatLayout:
padding: [50,50,50,50]
spacing: 50
FloatLayout:
orientation: 'vertical'
Label:
text: 'Login'
font_size: 18
halign: 'center'
text_size: root.width-20, 20
color: 0,0,0,1
pos_hint: {"right":1, "top":1.25}
TextInput:
id: login
multiline:False
font_size: 28
size_hint: 0.50, 0.10
pos_hint: {"right":0.75, "top":0.70}
FloatLayout:
orientation: 'vertical'
Label:
text: 'Password'
halign: 'center'
font_size: 18
text_size: root.width-20, 20
color: 0,0,0,1
TextInput:
id: password
multiline:False
password:True
font_size: 28
size_hint: 0.50, 0.10
pos_hint: {"right":0.75, "top":0.45}
Button:
text: 'Login'
size_hint: 0.25, 0.25
font_size: 24
pos_hint: {"right":0.625, "top":0.30}
<WhiteLabel#MDLabel>
height: self.texture_size[1]
theme_text_color: "Custom"
text_color: 1, 1, 1, 1
<CustomInput#MDTextField>
multiline:False
# required: True
mode: "line"
pos_hint: {"right": 0.456}
current_hint_text_color: [0,0,0,0.5]
<RegisterScreen>:
name: "register_screen"
FloatLayout:
MDBanner:
id: banner
text: "ioshrdioaoisdhf"
MDToolbar:
id: toolbar
title: "Register"
elevation: 10
pos_hint: {'top': 1}
left_action_items: [['arrow-left', lambda screen: app.change_screen('welcome_screen', 'right')]]
BoxLayout:
orientation: "vertical"
height: self.minimum_height * 2
size_hint_y: None
pos_hint: {"top": 2}
CustomInput:
id: firstname
hint_text: "color_mode = 'custom'"
CustomInput:
id: surname
hint_text: 'Surname'
CustomInput:
id: email
hint_text: 'Email'

By naming your kv file as main.kv, you are taking advantage of the automatic loading of correctly named kv files as described in the documentation. However, you are also loading the same file using Builder.load_file("main.kv"). Loading the same kv file more than once can cause the sort of problems you are seeing. You can fix your problem by simply eliminating the call to Builder.load_file("main.kv"), or removing the entire build() method, or by changing the name of either the kv file or the MainApp class.

I have some problems when I work with the NavigationDrawer in KivyMD

I want to make an app that has 3 different levels of difficulty and has a NavigationDrawer to change customize the app, for example: Activate dark theme. When I add the navigation drawer, the elements in the window are not moving when the size of the app changes, and it has a weird blank space over the toolbar.
This is thee window with a default size. Notice the blank space over the toolbar.
This happens when I resize the window
This is the window with the NavigationDrawer toggled
Also, when I reduce the size of the window to the minimum value, this happens with the buttons in the NavigationDrawer
This is the kv code, and the Python file contains just an empty class:
Screen:
NavigationLayout:
MDNavigationDrawer:
id: nav_drawer
MDRectangleFlatButton:
text: "Screen 1"
on_release:
screen_manager.current = "menu"
MDRectangleFlatButton:
text: "Screen 2"
on_release:
screen_manager.current = "screen2"
ScreenManager
id: screen_manager
Screen:
name: "menu"
BoxLayout:
orientation: "vertical"
spacing: "50dp"
MDToolbar:
title: "Toolbar"
elevation: 11
left_action_items: [["menu", lambda x: nav_drawer.toggle_nav_drawer()]]
MDLabel:
text: "Select your level"
halign: "center"
pos_hint: {"center_x": 0.5, "center_y": 0.8}
font_style: "H5"
size_hint_y: None
hight: self.texture_size[1]
MDRectangleFlatButton:
text: " Advanced "
pos_hint: {"center_x": 0.5, "center_y": 0.7}
MDRectangleFlatButton:
text: "Intermediate"
pos_hint: {"center_x": 0.5, "center_y": 0.6}
MDRectangleFlatButton:
text: " Basic "
pos_hint: {"center_x": 0.5, "center_y": 0.5}
Screen:
name: "screen2"
MDLabel:
text: "Screen 2"

I tested it here, and the dimensioning is working normally.
the white space is because of the "spacing:" 50dp ", change it to 80dp and change you MDLabel to:
MDLabel:
text: "Select your level"
halign: "center"
pos_hint: {"center_x": 0.5, "center_y": 0.8}
font_style: "H5"