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How Can I Remove BoxLayout?

I want to remove a Boxlayout in my widget, but I cant.
There is a Boxlayout at the begining of the app called "Speca". After my sellections it must be removed.
When you run the app, sellect something in "Home" Spinner and click any of the new Toggle buttons.
Wtih the press of any of the Toggle buttons "Speca" must disappear.
Please help.
Here is main.py:
from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.widget import Widget
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.spinner import Spinner
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.properties import ObjectProperty, StringProperty, BooleanProperty
from kivy.properties import ListProperty
from collections import OrderedDict
from kivy.uix.togglebutton import ToggleButton
data1=["mother","father","son"]
data2=["uncle","aunt","grandfather"]
data3=["jack","mike","simon"]
data4=["1898","1975","1985","1885"]
amd="0dp"
class MainWidget(Widget):
def remove_layout(self, *ignore):
self.remove_widget(self.layout)
global amd
an0=tuple(list(OrderedDict.fromkeys(data1)))
cal5= ObjectProperty()
cal6= ObjectProperty()
def btn10(self,text):
if self.cal5:
self.cal5.parent.remove_widget(self.cal5)
self.cal5 =ModelSpecifications()
a=data2
b=data3
c=data4
mi=[]
n=0
while n < len(a):
aba=n
mi.append(aba)
n+=1
for i in mi:
self.b1=MyTButton(text=str(i),size_hint=(1,None),height="100dp",group="selections")
self.cal5.add_widget(self.b1)
self.ids.scd.add_widget(self.cal5, index=3)
def on_state(self, togglebutton): #<----THIS IS THE TUGGLEBUTTON I WANT USE
global amd
tb = togglebutton
text1=tb.text
if text1=="0":
amd="50dp"
elif text1=="1":
amd="100dp"
else:
amd="200dp"
if self.cal6:
self.cal6.parent.remove_widget(self.cal6)
self.cal6 =Spec()
self.ids.scd.add_widget(self.cal6, index=2)
class SecondPage(ScrollView):
pass
class Speca(BoxLayout): #<------ THIS IS THE BOXLAYOUT I WANT TO REMOVE
pass
class Spec(BoxLayout):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.size_hint=(1,None)
self.height=amd
class MyTButton(ToggleButton):
def __init__(self, **kwargs):
super().__init__(**kwargs)
class ModelSpecifications(BoxLayout): #this is the class I want add after my spinner selection
pass
class Calculation(GridLayout):
pass
class MyApp(App):
pass
MyApp().run()
here is my.kv :
MainWidget:
<MainWidget>:
hideable: hideable
ScreenManager:
id: scmanager
size: root.width, root.height
Screen:
id: scndpage
name: "second"
SecondPage:
Calculation:
id:scd
cols:1
height: self.minimum_height
row_default_height: "70dp"
size_hint_y: None
spacing:"10dp"
canvas.before:
Rectangle:
pos: self.pos
size: self.size
BoxLayout:
size_hint: 1, None
height: "50dp"
pading:"10dp"
spacing:"10dp"
orientation: "vertical"
BoxLayout:
orientation: "horizontal"
Label:
text:"Name:"
color: 0,0,0,1
TextInput:
text:"---"
color: 0,0,0,1
Label:
text:"Surname:"
color: 0,0,0,1
TextInput:
text:"-----"
color: 0,0,0,1
BoxLayout:
id:scdd
size_hint: 1, 1
height: "100dp"
orientation: "vertical"
BoxLayout:
size_hint: 1, None
height: "50dp"
orientation: "horizontal"
Label:
text: " Sellection:"
color: 0,0,0,1
Spinner:
text: 'Home'
values: root.an0
on_text: app.root.btn10(self.text)
Speca: #<------ THIS IS THE BOXLAYOUT I WANT TO REMOVE
Button:
text:" Calculate"
Button:
text:"Sellect"
Button:
text:"Back"
<ModelSpecifications>:
id:anss
pading:"10dp"
spacing:"10dp"
size_hint: 1, None
height: "100dp"
orientation: "horizontal"
<MyTButton#ToggleButton>: #<----THIS IS THE TUGGLEBUTTON I WANT USE
on_state:
app.root.on_state(self)
<Speca>: #<------ THIS IS THE BOXLAYOUT I WANT TO REMOVE
orientation:"vertical"
Label:
color: (1,1,0,1)
text:"I WANT TO REMOVE THIS PART WHEN I PRESS ANY OF TOGGLE BUTTONS"
Please run the app and see it.

Looks to me like speca is a child of the calculation widget with ID scd. So give speca an ID and then Remove speca via ids in on_srate python function.
Kv
SecondPage:
Calculation:
id:scd
speca:
id: speca
py
def on_state():
self.root.ids.scd.remove_widget(self.root.ids.speca)

YES.
When I make those changes;
Kv
SecondPage:
Calculation:
id:scd
speca:
id: speca
py
def on_state():
self.ids.scd.remove_widget(self.ids.speca)
It works.

RecycleView with multiple colums with different class

I have a kind of major problem here. I want to create a list at the bottom of my app. I have a dictionary which works on this guy's solution: How to put multiple columns into a kivy RecycleView?
HOWEVER, I want to add that widget with button. Everything looks fine but I have problem with ids.
Please take a look at it, "FinalList" class cant find variables.
When you run it click "Calculate selections" it adds another class which has another button called "Confirm". Click "Confirm", it should add list at the bottom but it does not.
here is my main.py code;
from kivy.animation import Parallel
from kivy.app import App
from kivymd.app import MDApp
from kivy.uix.gridlayout import GridLayout
from kivy.uix.recycleview import RecycleView
from kivy.uix.widget import Widget
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.stacklayout import StackLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.scrollview import ScrollView
from kivy.uix.button import Button
from kivy.uix.checkbox import CheckBox
from kivy.uix.label import Label
from kivy.uix.popup import Popup
from kivy.core.window import Window
from kivy.lang import Builder
from functools import partial
from kivy.properties import ObjectProperty, StringProperty, BooleanProperty
#Window.size=((640/1.5),(960/1.5))
items = [{'SP1': 'Artikelnummer', 'SP2': 'Name', 'SP3': 'Groesse'},
{'SP1': '510001', 'SP2': 'Big Pump', 'SP3': '1.50 L'},
{'SP1': '523001', 'SP2': 'Leonie Still', 'SP3': '1.50 L'},
{'SP1': '641301', 'SP2': 'Cola Mix', 'SP3': '1.50 L'}
]
class MainWidget(Widget):
cal2= ObjectProperty()
cal4= ObjectProperty()
def btn4(self):
self.cal2 = MaterialS() #MaterialS is my class with different widget
self.ids.scd.add_widget(self.cal2, index=0) #scd is the id of my main widget, index =0 help me to insert to the bottom
def btn8(self):
self.cal4 = RV() **#HERE I CALL THE RV CLASS**
self.ids.scd.add_widget(self.cal4, index=0)
class SecondPage(ScrollView):
pass
class Calculation(GridLayout):
pass
class MaterialS(BoxLayout):
def btn7(self,x):
self.ids[x].disabled= True
def btn9(self,x):
self.ids[x].disabled= True
class FinalList(BoxLayout):
pass
class RV(RecycleView):
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
self.data = [{'spalte1_SP': str(x['SP1']), 'spalte2_SP': str(x['SP2']), 'spalte3_SP': str(x['SP3'])} for x in items]
class MyApp(MDApp):
pass
MyApp().run()
here is my.kv file;
MainWidget:
<MainWidget>:
ScreenManager:
id: scmanager
size: root.width, root.height
Screen:
id: scndpage
name: "second"
SecondPage:
Calculation:
id:scd
cols:1
height: self.minimum_height
row_default_height: "70dp"
size_hint_y: None
spacing:"10dp"
canvas.before:
Rectangle:
pos: self.pos
size: self.size
Button:
id: cslect
text:"Calculate Selections"
on_press: app.root.btn4()
<MaterialS>:
pading:"10dp"
spacing:"10dp"
size_hint: 1, None
height: "250dp"
orientation:"vertical"
BoxLayout:
size_hint: 1, 1
orientation:"horizontal"
Label:
text:"cutter head material"
color: 0,0,0,1
Button:
id: btnStd
text:"Confirm"
on_press: app.root.btn8()
on_release: root.btn9("btnStd")
<Optionals>:
BoxLayout:
orientation: "vertical"
Button:
id: btnStd
text:"Confirm"
on_press: app.root.btn8()
on_release: root.btn9("btnStd")
<FinalList>:
orientation: 'horizontal'
spalte1_SP: 'spalte1'
spalte2_SP: 'spalte2'
spalte3_SP: 'spalte3'
Label:
id: SP1
text: app.root.spalte1_SP **#HERE IS THE MAIN PROBLEM**
Label:
id: SP2
text: app.root.spalte2_SP **#HERE IS THE MAIN PROBLEM**
Label:
id: SP3
text: app.root.spalte3_SP **#HERE IS THE MAIN PROBLEM**
<RV>:
viewclass: 'FinalList'
RecycleBoxLayout:
default_size: None, dp(20)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'

You just need to correct your references to the properties of the FinalList. Like this:
<FinalList>:
orientation: 'horizontal'
spalte1_SP: 'spalte1'
spalte2_SP: 'spalte2'
spalte3_SP: 'spalte3'
Label:
id: SP1
text: root.spalte1_SP #**#HERE IS THE MAIN PROBLEM**
Label:
id: SP2
text: root.spalte2_SP #**#HERE IS THE MAIN PROBLEM**
Label:
id: SP3
text: root.spalte3_SP #**#HERE IS THE MAIN PROBLEM**

I get an attribute error when I run this program. I'm working with kivy module in python and am not sure of how to overcome this

So, here's the python file:
import kivy
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.gridlayout import GridLayout
from kivy.lang import Builder
from kivy.properties import ObjectProperty
from kivy.uix.screenmanager import Screen, ScreenManager
from kivy.uix.textinput import TextInput
from kivy.graphics import *
class Login(Widget):
name = ObjectProperty(None)
email = ObjectProperty(None)
print(name, email)
kv = Builder.load_file("test_page.kv")
class MyApp(App):
def build(self):
return kv
if __name__ == '__main__':
MyApp().run()
And here's the kivy file, that I've saved as 'test_page.kv'
<SmoothButton#Button>:
background_color: (0,0,0,0)
background_normal: ''
back_color: (1,0,1,1)
border_radius: [18]
canvas.before:
color:
rgba: self.back_color
RoundedRectangle:
size: self.size
pos: self.pos
radius: self.border_radius
Login:
name: name
email: email
GridLayout:
cols: 1
size: root.width-200, root.height-200
pos: 100, 100
GridLayout:
cols: 2
Label:
text: "Name"
TextInput:
id: name
multiline: False
Label:
text: "Email"
TextInput:
id: email
multiline: False
SmoothButton:
text: "Submit"
back_color: (0,0.95,0.105,0)
I want to build a page which has a rounded rectangular submit button... I watched several tutorials on how to do the same but got no efficient results. I'd be thankful if anyone could guide me through this.

In your canvas.before, Color must be capitalized:
canvas.before:
Color:
rgba: self.back_color

Making TextInput on_text_validate event accessible from another widget

I'm trying to create a custom widget as a module. My custom widget includes a TextInput and some other stuff inside a FloatLayout widget.
When i import my custom widget i want to use on_text_validate event for TextInput within the Floatlayout.
As you know we can add the button behavior to any widget via ButtonBehavior class but i couldn't find a way to add on_text_validate event to my custom widget.
That's my module named mymodule.py inside my project folder.
from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.lang import Builder
#from kivy.uix.behaviors import FocusBehavior
Builder.load_string("""
<SearchBar>:
id: search_bar
size_hint: 1,.1
pos_hint: {'top':1}
canvas:
Color:
rgba: 1,1,1,1
Rectangle:
pos: self.pos
size: self.size
TextInput:
id: input
hint_text: 'search'
size_hint: .82,None
height: dp(33)
pos_hint: {'center_x':.565,'center_y': .5}
multiline: False
padding_y: [self.height / 2.0 - (self.line_height / 2.0) * len(self._lines), 0]
padding_x: 20,150
""")
class SearchBar(FloatLayout):
pass
I call it from main.py as
#:import SearchBar mymodule.SearchBar
And that's my main.py
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.floatlayout import FloatLayout
Builder.load_string("""
#:import SearchBar mymodule.SearchBar
<MyTest>:
SearchBar:
id: search
size_hint: 1,.1
# on_text_validate: root.do_something()
""")
class MyTest(FloatLayout):
def do_something(self,*args):
print('done')
class Test(App):
def build(self):
return MyTest()
Test().run()

A possible solution is to create an event with the same name and shoot it with the TextInput event:
from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.lang import Builder
Builder.load_string("""
<SearchBar>:
id: search_bar
size_hint: 1,.1
pos_hint: {'top':1}
canvas:
Color:
rgba: 1,1,1,1
Rectangle:
pos: self.pos
size: self.size
TextInput:
id: input
hint_text: 'search'
size_hint: .82,None
height: dp(33)
pos_hint: {'center_x':.565,'center_y': .5}
multiline: False
padding_y: [self.height / 2.0 - (self.line_height / 2.0) * len(self._lines), 0]
padding_x: 20,150
on_text_validate: root.dispatch('on_text_validate', *args)
""")
class SearchBar(FloatLayout):
def __init__(self, **kwargs):
super(SearchBar, self).__init__(**kwargs)
self.register_event_type('on_text_validate')
def on_text_validate(self, *args):
pass

How can I update screen values when I change the screen

I have a script in python and a kivy file with different screens. In screen 1 i introduce some information in a TextInput and when I change to the following screen (screen 2) I want to recover the values of the variable I introduce in TextInput of screen 1. I have problem to update value in function __init__ of screen 2.
I don't know which is the best way to update values automatically.
class PantallaDos(Screen):
def __init__(self, *args):
super(PantallaDos, self).__init__(**kwargs)
softinput_mode = 'below_target'
Window.softinput_mode = softinput_mode
self.ids['pol'].text = 'verdadero'
Kivy kv.file
<PantallaDos>:
BoxLayout:
orientation: 'vertical'
padding: 10
spacing: 3
canvas:
Color:
rgb: 0.15,0.14,0.14
Rectangle:
pos: self.pos
size: self.size
....
SLabel:
id: pol
size_hint: None, None
size: root.width, 30

You can save the shared data in the ScreenManager class, or App class forexample.
Or just access it directly in kv.
Here is an example, where you just use the id of the textinput, in kv, to set the label text in the other screen.
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
Builder.load_string("""
<Manager>:
Screen:
name: 'first'
BoxLayout:
TextInput:
id: ti
text: 'type something'
Button:
text:'go to other'
on_press: app.sm.current = 'other'
Screen:
name: 'other'
BoxLayout:
Label:
text: ti.text
Button:
text:'go to first'
on_press: app.sm.current = 'first'
""")
class Manager(ScreenManager):
pass
class ClassApp(App):
def build(self):
self.sm = Manager()
return self.sm
if __name__ == '__main__':
ClassApp().run()