I've come to a problem in a larger app im writing that seems dumb but I can't figure it out. I want to have the user select an image path on screen1 and then have the path load onto screen2. This presents 2 problems.
if the path is first empty, kivy runs the second window anyway, and cv2 reads an empty path. I would like to keep the path empty and prevent the window from running until the path is loaded from the previous window
my code isn't even loading the data from the previous window. I know i could update the image source directly, but I am seeking to update the path variable
Here is a test code and test image
from kivy.app import App
from kivy.uix.relativelayout import RelativeLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
import cv2
class WindowManager(ScreenManager):
pass
class Window1(Screen, RelativeLayout):
button_size = (100, 100)
button_pos = (400, 400)
class Window2(Screen,RelativeLayout):
path=''
print(cv2.imread(path).shape)
KV = Builder.load_string("""
WindowManager:
Window1:
Window2:
<Window1>:
name: 'one'
RelativeLayout:
Button:
allow_stretch: True
keep_ratio: True
size_hint: None,None
size: root.button_size
pos: root.button_pos
on_press:
root.manager.screens[1].path='/MRI-scan.jpg'
on_release:
app.root.current = "two"
root.manager.transition.direction = "left"
<Window2>:
name: 'two'
RelativeLayout:
Image:
id: my_image
size_hint: 0.5,0.5
pos: (0,0)
source: root.path
""")
class TApp(App):
def build(self):
return KV
if __name__ == '__main__':
TApp().run()
I was able to solve the problem with one shortcoming. Anyone who figures out this shortcoming, I'll check mark your answer. I can switch between images using the path and I did not even need to use StringProperty. However, I cannot start with path=''. I need to start with a file initially. Here's the solution. Anyone who can provide an answer by starting with an empty string, I'll give a check mark to you. I solved the problem with on_pre_enter.
from kivy.app import App
from kivy.uix.relativelayout import RelativeLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
import cv2
class WindowManager(ScreenManager):
pass
class Window1(Screen, RelativeLayout):
button_size = (100, 100)
button_pos = (400, 400)
btn2_size=(100,100)
btn2_pos=(400,300)
def on_touch_up(self, touch):
if self.ids.btn1.collide_point(*touch.pos):
self.manager.get_screen('two').path='img1'
if self.ids.btn2.collide_point(*touch.pos):
self.manager.get_screen('two').path = 'img2'
class Window2(Screen,RelativeLayout):
btn3_size = (100, 100)
btn3_pos = (400, 200)
path='img start' #===> this is where I want to start with a blank string
print(cv2.imread(path).shape)
def on_pre_enter(self, *args):
self.manager.get_screen('two').ids['my_image'].source=self.path
print(print(cv2.imread(self.path).shape)
)
KV = Builder.load_string("""
WindowManager:
Window1:
Window2:
<Window1>:
name: 'one'
RelativeLayout:
Button:
id: btn1
text: 'one'
allow_stretch: True
keep_ratio: True
size_hint: None,None
size: root.button_size
pos: root.button_pos
on_release:
app.root.current = "two"
root.manager.transition.direction = "left"
Button:
id: btn2
text: 'two'
allow_stretch: True
keep_ratio: True
size_hint: None,None
size: root.btn2_size
pos: root.btn2_pos
on_release:
app.root.current = "two"
root.manager.transition.direction = "left"
<Window2>:
name: 'two'
RelativeLayout:
Image:
id: my_image
size_hint: 0.5,0.5
pos: (0,0)
source: root.path
Button:
id: btn3
text: 'previous'
allow_stretch: True
keep_ratio: True
size_hint: None,None
size: root.btn3_size
pos: root.btn3_pos
on_release:
app.root.current = "one"
root.manager.transition.direction = "right"
""")
class TApp(App):
def build(self):
return KV
if __name__ == '__main__':
TApp().run()
Related
I am trying to make a children's learning app using KIVY and gTTS where a child will be shown a random image and will have to identify it by saying what it is ("square" for square, "three" for 3 etc).
So far I have the menus working fine.
I am using random.choice() in a dictionary where the value is the image path and the key is "the name"
If I open the relevant screen the image is correctly selected at random and displayed using def on_pre_enter(self, *args): and gTTS kicks in fine as well using def on_enter(self, *args): but only ONCE
I want it to load a new random image once the user replies to the previous one for an X amount of loops but no matter what I try I cannot get it to work (I thought of putting everything on a for x in range() loop as well as using a counter on a while X < Y: but without any success).
here's my .py file
import random
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.properties import StringProperty
class MenuWindow(Screen):
pass
class ShapeGame(Screen):
rand_shape = StringProperty()
def on_pre_enter(self, *args):
random_shape = {"square":'shapes/square.png', "triangle":'shapes/triangle.jpg', "circle":'shapes/circle.jpg'}
random_shape_key, random_shape_value = random.choice(list(random_shape.items()))
print(random_shape_key)
self.rand_shape_key = random_shape_key
self.rand_shape = random_shape_value
def on_enter(self, *args):
print(self.random_shape_key)
class WindowManager(ScreenManager):
pass
class MainApp(App):
def build(self):
return Builder.load_file('Main.kv')
if __name__ == '__main__':
MainApp().run()
and my .kv file
#:kivy 2.0
WindowManager:
MenuWindow:
ShapeGame:
<MenuWindow>:
name: "menu"
BoxLayout:
orientation: "vertical"
size: root.width, root.height
Label:
id:"menu"
text: "Menu Screen"
font_size: 34
BoxLayout:
size_hint: 1.0, 0.2
Button:
text: "Shape Game"
font_size: 22
on_release:
app.root.current = "shapes"
root.manager.transition.direction = "left"
Button:
text: "Exit"
font_size: 22
size_hint: 1.0, 0.2
on_release: app.root.current = exit()
<ShapeGame>:
name: "shapes"
id: ShapeGame
BoxLayout:
orientation: "vertical"
size: root.width, root.height
Image:
id:"shapes"
screen: ShapeGame
source: self.screen.rand_shape
before_source: self.source
BoxLayout:
size_hint: 1.0, 0.2
size: root.width, root.height
Button:
text: "Menu"
on_release:
app.root.current = "menu"
root.manager.transition.direction = "right"
Button:
text: "Exit"
on_release:
app.root.current = exit()
and the entire repo
Not sure I can follow your problem, assuming that you want to shuffle images on entering screen after some time until some value reaches its limit.
For that you can use Clock.schedule_interval with some waiting time, say 2.0 sec.
Thus your ShapeGame will now look like,
class ShapeGame(Screen):
rand_shape = StringProperty()
count = 0
def on_pre_enter(self, *args):
self.count = 0
self.change_event = Clock.schedule_interval(self.chage_photo, 2.0)
def chage_photo(self, *args):
if self.count < 3:
self.count += 1
else:
self.change_event.cancel()
random_shape = {"square":'shapes/square.png', "triangle":'shapes/triangle.jpg', "circle":'shapes/circle.jpg'}
random_shape_key, random_shape_value = random.choice(list(random_shape.items()))
print(random_shape_key)
self.rand_shape_key = random_shape_key
self.rand_shape = random_shape_value
You should change source: self.screen.rand_shape to source: root.rand_shape.
You may also trigger the same action by a button instead of using Clock.schedule.
I want to catch a value from my first screen into my thirdscreen.
In the first, I write my name in an input field.
I go to the next window.
And I try to show my name in this last window.
So I share the code with you and I hope I will find an issue.
Python code :
import kivy
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.lang import Builder
from kivy.core.window import Window
from kivy.properties import ObjectProperty
from kivy.uix.screenmanager import ScreenManager, Screen
#define ou different screens
class FirstWindow(Screen):
def envoyer(self):
name = self.ids.nom_input.text
self.ids.my_name.text = name
class SecondWindow(Screen):
pass
class ThirdWindow(Screen):
#PROBLEM HERE
def on_press(self):
self.ids.recup_infos.text = self.root.get_screen('FirstWindow').ids.my_name.text
class WindowManager(ScreenManager):
pass
class MonWidget(Widget):
pass
kv = Builder.load_file('new_window.kv')
class AwesomeApp(App):
def build(self):
Window.clearcolor = (0,0,0,0)
return kv
if __name__ == '__main__':
AwesomeApp().run()
My KV CODE :
WindowManager:
FirstWindow:
SecondWindow:
ThirdWindow:
<FirstWindow>:
name: "romain"
BoxLayout:
orientation: "vertical"
size: root.width, root.height
Label:
id: my_name
text: "Entrez votre nom"
font_size: 32
TextInput:
id: nom_input
multiline: False
size_hint: (1, .5)
Button:
text: "Next screen"
font_size: 32
on_press: root.envoyer()
on_release:
app.root.current = "Mickael"
root.manager.transition.direction = "left"
<SecondWindow>:
name: "Mickael"
BoxLayout:
orientation: "vertical"
size: root.width, root.height
Label:
text: "Entre votre ville"
font_size: 32
TextInput:
id: ville_input
multiline: False
size_hint: (1, .5)
Button:
text: "Vérifier les infos"
font_size: 32
on_release:
app.root.current = "foncier"
root.manager.transition.direction = "left"
Button:
text: "go back first screen"
font_size: 32
on_release:
app.root.current = "romain"
root.manager.transition.direction = "right"
<ThirdWindow>:
name: "foncier"
BoxLayout:
orientation: "vertical"
size: root.width, root.height
Label:
text: "Verifier : "
font_size: 32
Label:
id: recup_infos
text: ""
font_size: 32
color: 'white'
Button:
text: "On press"
font_size: 32
#Problem HERE
on_press: root.on_press()
Button:
text: "Précedent"
font_size: 32
on_release:
app.root.current = "Mickael"
root.manager.transition.direction = "right"
Could you help me ?
Thank you
Romain
In your on_press method:
def on_press(self):
self.ids.recup_infos.text = self.root.get_screen('FirstWindow').ids.my_name.text
self.root.get_screen('FirstWindow').ids.my_name.text isn't the correct way to get access to widgets outside of the class that you are in right now, or in this situation, screen. The correct way is to use the App.get_running_app() method:
self.ids.recup_infos.text = App.get_running_app().root.ids.First.ids.my_name.text
But before doing that, you have to give ids to the screens of your app, so that the First argument of the method demonstrated above actually makes sense:
WindowManager:
FirstWindow:
id: First
# "First" is the id of the FirstWindow class
# which can also explain why there was a "First" arg
# inside "App.get_running_app().root.ids.First.ids.my_name.text"
SecondWindow:
id: Second
ThirdWindow:
id: Third
Still confused to why this works? Let's divide the attributes of App.get_running_app().root.ids.First.ids.my_name.text into 3 parts:
App.get_running_app(): this method returns the location of your running App class, in this case AwesomeApp. This also acts as self if you were to get the variable inside the App object itself
.root.ids.First: if you read the Kivy documentation, or just simply watched Kivy course videos online, carefully, you should know that self.root.ids inside the App object returns a list of ids of the widgets inside your root widget. In this case, App.get_running_app().root.ids is doing the same thing here, and your screens are passed in the ScreenManager root widget, hence make First an available attribute in App.get_running_app().root.ids
.ids.my_name.text: same as above, App.get_running_app().root.ids.First acts the same as self if you were to run it in your FirstWindow class, which gives you the opportunity to get access to variables outside of your working classes/screens
I have the following classes in my kivy app, and i would like to call the blink method in my mainApp class. The start pulsing and blink methods enable the MainWindow background to pulse. However it's not working inside the MainWindow class and i need to call it in my mainApp class. Commented out (build method in mainApp) is what i tried, which results to the error Exception: Invalid instance in App.root. My python file:
from kivy.uix.widget import Widget
from kivy.properties import ObjectProperty
from kivy.lang import Builder
from kivy.uix.screenmanager import Screen
from kivy.core.window import Window
from kivymd.app import MDApp
from kivy.uix.image import Image
from kivy.animation import Animation
from kivy.clock import Clock
from kivy.properties import ColorProperty
from kivy.uix.popup import Popup
from kivy.uix.floatlayout import FloatLayout
from plyer import filechooser
data = ""
class MainWindow(Screen):
def analyze_data(self):
global data
data = self.ids.user_input.text
data = analyze(data)
animated_color = ColorProperty()
pulse_interval = 4
def blink(self):
x = Clock.schedule_once(self.start_pulsing, 5)
return x
def start_pulsing(self, *args):
d = self.pulse_interval / 2
anim = Animation(animated_color=(69/255, 114/255, 147/255, 1), duration=d) + Animation(animated_color=(1, 1, 1, 1), duration=d)
anim.repeat = True
anim.start(self)
class OutputScreen(Screen):
def on_enter(self, *args):
self.ids.output_label.text = data
class mainApp(MDApp):
def __init__(self):
super().__init__()
def choose_file(self):
try:
filechooser.open_file(on_selection = self.handle_selection)
except:
pass
def handle_selection(self,selection):
global path
selection_ls = selection[0]
path = selection_ls
#print(path)
def change_screen(self,screen):
screemanager = self.root.ids['screenmanager']
screemanager.current = screen
def change(self):
self.change_screen('output')
def back(self):
self.change_screen('main')
'''
def build(self):
x = MainWindow().blink()
return x'''
and my kv file:
#:import utils kivy.utils
GridLayout:
cols:1
ScreenManager:
id: screenmanager
MainWindow:
id: main
name: 'main'
OutputScreen:
id: output
name: 'output'
<MainWindow>:
BoxLayout:
orientation:'vertical'
MDBottomNavigation:
panel_color: utils.get_color_from_hex("#ffffff")
MDBottomNavigationItem:
name:'analytics'
text:'analytics'
icon:'account-circle'
FloatLayout:
size: root.width, root.height
canvas.before:
Color:
rgba: root.animated_color
Rectangle:
pos:self.pos
size:self.size
TextInput:
multiline:True
id: user_input1
pos_hint:{"x" : 0.05, "top" : 0.9}
size_hint: 0.9, 0.37
Label:
markup: True
id:input_label
pos_hint:{"x" : 0, "top":1}
size_hint: 1 ,0.08
font_size : 32
bold: True
canvas.before:
Color:
rgb: utils.get_color_from_hex("01121c")
Rectangle:
size: self.size
pos: self.pos
Button:
pos_hint:{"top" : 0.51, "x" : 0.05}
size_hint: (None,None)
width : 150
height : 40
font_size : 23
text:'Submit'
on_press: root.analyze_data()
on_release: app.change()
Button:
pos_hint:{"top":0.42, "x":0.05}
size_hint: (None,None)
width : 150
height : 40
font_size : 23
text:'Upload'
on_release:app.choose_file()
Button:
id:'info_button'
pos_hint:{"top":0.47, "x":0.8}
size_hint: (None,None)
width : 50
height : 22
font_size : 23
text:'i'
on_release:root.analytics_info()
<OutputScreen>:
ScrollView:
GridLayout:
cols:1
MDIconButton:
icon:'arrow-left'
pos_hint:{'top':1,'left':1}
size_hint: 0.1,0.1
user_font_size : '64sp'
on_release: app.back()
Label:
id: output_label
multiline:True
text_size: self.width, None
size_hint: 1, None
height: self.texture_size[1]
color: 0,0,0,1
padding_x: 15
Any help will be much appreciated.
The build() method of an App should return a Widget that will become the root of the App. But your build() method returns a ClockEvent (the return from Clock.schedule_once()). Try changing your build() method to:
def build(self):
x = MainWindow()
x.blink()
return x
Since you do not call Builder.load_file(), I assume that your kv file is named main.kv, and therefore will get loaded automatically. If that is true, then you do not need a build() method at all. Instead add an on_start() method to your mainApp class, like this:
def on_start(self):
self.root.ids.main.blink()
I am new to Kivy and need some help in understanding function scope. I have built a simple app with two screens. The first screen has two buttons and the second screen has a text label at the centre. On the first screen, I have used app.root.current='new_screen_name' with the on_release attribute for one button and it works fine. It takes me to the next screen which is the intended function. For the second button, I have used a function call which has been defined in the Python file under the class definition of the first screen (the root widget of the button). However, this method does not work and the app window simply closes. I guess I am making a mistake in the function scope and call But I cannot figure out what. Any help would be greatly appreciated.
Python file:
from kivy.config import Config
# Config.set should be used before importing any other Kivy module.
Config.set('kivy','window_icon','sivaicon.png')
# Config set for resizing image button
Config.set('graphics', 'resizable', True)
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.tabbedpanel import TabbedPanel
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.button import Button
from kivy.uix.behaviors import ButtonBehavior
from kivy.uix.image import Image
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.lang.builder import Builder
class SivaLoginScreen(Screen):
def func_authentication(self):
app.root.current='tabbed_screen'
class SivaTabbedScreen(Screen):
pass
class SivaScreenManager(ScreenManager):
pass
class ImageButton(ButtonBehavior, Image):
pass
# Tell Kivy to directly load a file. If this file defines a root widget, it will be returned by the method.
root_widget = Builder.load_file('siva.kv')
class SivaApp(App):
def build(self):
# Initialize root widget
return root_widget
if __name__ == '__main__':
# Run application
SivaApp().run()
Kivy file (.kv):
SivaScreenManager:
SivaLoginScreen:
SivaTabbedScreen:
<ImageButton>:
keep_ratio: True
<SivaLoginScreen>:
name: 'login_screen'
canvas.before:
Color:
rgba: 195/255, 60/255, 35/255, 1
Rectangle:
pos: self.pos
size: self.size
FloatLayout:
size: root.width, root.height
Image:
id: login_logo_siva
source: 'images/sivalogo4.png'
keep_ratio: True
size_hint: 0.2, 0.2
pos_hint: {'center_x':0.5, 'center_y':0.75}
Label:
id: login_label_siva
pos: self.x*0.5-4, self.y*0.5+15
markup: True
font_name: 'roboto/Roboto-Medium.ttf'
text: '[color=#FDFD98]S.[/color][color=#B29DD9]I[/color][color=#FDFD98].[/color][color=#77DD77]V[/color][color=#FDFD98].[/color][color=#779ECB]A[/color]'
font_size: '50sp'
Label:
id: login_label_slogan1
pos: self.x*0.5-3, self.y*0.5-6
markup: True
font_name: 'roboto/Roboto-Regular.ttf'
text: '[color=#FDFD98]SLOGAN TEXT[/color]'
font_size: '15sp'
Label:
id: login_label_slogan2
pos: self.x*0.5-3, self.y*0.5-20
markup: True
font_name: 'roboto/Roboto-Regular.ttf'
text: '[color=#FDFD98]HEADLINE TEXT[/color]'
font_size: '15sp'
BoxLayout:
id:login_button_layout
orientation: 'horizontal'
size_hint: 0.2, 0.2
pos_hint: {'center_x':0.5, 'center_y':0.25}
ImageButton:
id: first_button
source: {'normal': 'images/first.png', 'down': 'images/first-down.png'} [self.state]
on_release: app.root.current='tabbed_screen'
ImageButton:
id: second_button
source: {'normal': 'images/second.png', 'down': 'images/second-down.png'} [self.state]
on_release: app.root.func_authentication()
<SivaTabbedScreen>:
name: 'tabbed_screen'
FloatLayout:
size: root.width, root.height
Label:
pos: self.x*0.5, self.y*0.5
text: 'SECOND SCREEN'
font_size: '50sp'
In your case, app.root link to SivaScreenManager which is the root widget of your application. And in these class, there is not a func_authenticationfunction, why you app crashed.
To refer a class itself in a KV definition, you must just use root, so right code must be :
on_release: root.func_authentication()
see Kivy Language - Reserved Keywords
Definition of func_authentication is not correct also, app is unknown. Use either :
App.get_running_app().root.current='tabbed_screen' or
self.manager.current='tabbed_screen'
Question:
How do you use an On-Press event to change screen for dynamically created buttons in python, and without using KV language?
Goal:
Be able to navigate to new screen from clicking on dynamically created button,
[without needing to create button in Kivy, and still getting to use Screenmanager in both Python and Kivy (not sure if you have to stick with either Python or Kivy throughout entire program?]
Things I've already tried:
Using button_share.bind(on_press = self.changer), then this:
def changer(self,*args):
ScreenManager()
screenmanager.current = 'MainScreen'
But I get the error ScreenManagerException: No Screen with name "MainScreen".
Suspicion:
I think this is because I'm creating a new instance of ScreenManager, instead of referencing the existing one. To combat this issue, I considered instantiating Screenmanager() in the App class, then referencing that instantiation in the my button def changer(self, *args) method, but that's useless if it's not the same ScreenManager I'm actually using for all my screens. And those are all defined in KV language. I wouldn't be able to switch them all over without a substantial amount of effort.
Using:
button_share.bind(on_press=partial(app.sm.setter('current'), (app.sm, "MainScreen")))`
But the error I get here is ValueError: ScreenManager.current accept only str
Below is a fully runnable example:
Note: In this example, I want to click 'Continue Editing' button, then click on 'Test 1', 'Test 2' or 'Test 3' button and have it take me to another screen.
Python Code:
from kivy.app import App
# kivy.require("1.10.0")
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.clock import Clock
from kivy.uix.widget import Widget
#from kivy.base import runTouchApp
from kivy.properties import StringProperty, ObjectProperty, NumericProperty
from functools import partial
class ScrollableLabelDataEntryInstructions(BoxLayout):
pass
class NewGarageScreen(Screen):
pass
class ContinueEditingScreen(Screen):
pass
class GarageNameBoxLayout(BoxLayout):
box_share2 = ObjectProperty()
sm = ScreenManager()
def __init__(self, **kwargs):
super(GarageNameBoxLayout, self).__init__(**kwargs)
self.orientation = "vertical"
Clock.schedule_interval(self.create_button, 5)
def create_button(self, *args):
self.box_share2.clear_widgets()
app = App.get_running_app()
#put GarageNameStartList data into app class, then pull from it in this class
top_button_share = 1.1
color = (.4, .4, .4, 1)
for i in range(len(app.GarageNameStartList)):
top_button_share -= .4
id_ = app.GarageNameStartList[i]
button_share = Button(background_normal='',
background_color = color,
id = id_,
pos_hint = {"x": 0, "top": top_button_share},
size_hint_y = None,
height = 60,
font_size = 30,
text = app.GarageNameStartList[i])
button_share.bind(on_press = self.changer)
#button_share.bind(on_press=partial(app.sm.setter('current'), (app.sm, "MainScreen")))
self.box_share2.add_widget(button_share)
def changer(self,*args):
ScreenManager()
#app = App.get_running_app()
screenmanager.current = 'MainScreen'
class BackHomeWidget(Widget):
pass
class MainScreen(Screen):
pass
class AnotherScreen(Screen):
pass
class ScreenManagement(ScreenManager):
pass
presentation = Builder.load_file("example_on_press.kv")
class MainApp(App):
GarageNameStartList = ["Test1", "Test2", "Test3"]
def Update_GarageNameStartList(self, *args):
self.GarageNameStartList = ["Test1", "Test2", "Test3"]
def build(self):
return presentation
if __name__ == "__main__":
MainApp().run()
KV Code:
#: import FadeTransition kivy.uix.screenmanager.FadeTransition
ScreenManagement:
transition: FadeTransition()
MainScreen:
AnotherScreen:
NewGarageScreen:
ContinueEditingScreen:
<SmallNavButton#Button>:
font_size: 32
size: 125, 50
color: 0,1,0,1
<MedButton#Button>:
font_size: 30
size_hint: 0.25, 0.1
color: 0,1,0,1
<BackHomeWidget>:
SmallNavButton:
on_release: app.root.current = "main"
text: "Home"
pos: root.x, root.top - self.height
<MainScreen>:
name: "main"
FloatLayout:
MedButton:
on_release: app.root.current = "edit"
text: "Edit"
pos_hint: {"x":0.3728, "top": 0.4}
<AnotherScreen>:
name: "edit"
BackHomeWidget:
SmallNavButton:
on_release: app.root.current = "main"
text: "Back"
pos: root.x, root.top - (2.25*(self.height))
FloatLayout:
MedButton:
on_release: app.root.current = "continueediting"
text: "Continue Editing"
pos_hint: {"x":0.25, "top": 0.6}
MedButton:
on_release: app.root.current = "newgarage"
text: "Create New"
pos_hint: {"x":0.3728, "top": 0.4}
<NewGarageScreen>:
name: "newgarage"
BackHomeWidget:
SmallNavButton:
on_release: app.root.current = "edit"
text: "Back"
pos: root.x, root.top - (2.25*(self.height))
FloatLayout:
MedButton:
text: "1. Groundfloor"
pos_hint: {"x":0, "top": 0.6}
<GarageNameBoxLayout>:
box_share2: box_share2
ScrollView:
GridLayout:
id: box_share2
cols: 1
size_hint_y: None
size_hint_x: 0.5
spacing: 5
padding: 130
height: self.minimum_height
canvas:
Color:
rgb: 0, 0, 0
Rectangle:
pos: self.pos
size: self.size
<ContinueEditingScreen>:
name: "continueediting"
GarageNameBoxLayout:
BackHomeWidget:
SmallNavButton:
on_release: app.root.current = "edit"
text: "Back"
pos: root.x, root.top - (2.25*(self.height))
Your code can be improved in the following things:
You do not have to create box_share2 in the .py since you're creating it in the .kv
When you use sm = ScreenManager() you are creating another ScreenManager different from the original, that is not necessary.
It is not necessary to use range and len, make your code less readable, you just have to iterate.
If we look at the structure of the .kv we see that the presentation object is the ScreenManager so you can get it via app.root.
Using the above your code the solution is:
[...]
class GarageNameBoxLayout(BoxLayout):
def __init__(self, **kwargs):
super(GarageNameBoxLayout, self).__init__(**kwargs)
self.orientation = "vertical"
Clock.schedule_interval(self.create_button, 5)
def create_button(self, *args):
self.box_share2.clear_widgets()
app = App.get_running_app()
sm = app.root
#put GarageNameStartList data into app class, then pull from it in this class
top_button_share = 1.1
color = (.4, .4, .4, 1)
for text in app.GarageNameStartList:
top_button_share -= .4
id_ = text
button_share = Button(background_normal='',
background_color = color,
id = id_,
pos_hint = {"x": 0, "top": top_button_share},
size_hint_y = None,
height = 60,
font_size = 30,
text = text)
button_share.bind(on_press=lambda *args: setattr(sm, 'current', "main"))
self.box_share2.add_widget(button_share)
[...]