Develop Reference

Return value from dropdown button in kivy

I currently have a code that runs a dropdown button in kivy. I would like to send the value 1,2,3,4 into the main class when the value is selected.
Specifying chain of events:
click dropdown button
four options are displayed
select one of the four options ==> this is when the value gets sent back to the main class
dropdown button text replaced with the selection
I have tried using get_screen(), which is equivalent to get_running_app when using windows, but this was delayed. I also tried creating an external variable but this was delayed too.
Below is my code. Thanks.
'''
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.dropdown import DropDown
class WindowManager(ScreenManager):
pass
class Drop_down(DropDown):
pass
class MenuWindow(Screen):
General_select_button_size = (100, 100)
General_select_button_pos = (400, 400)
class GeneralWindow(Screen):
drop_size = (100,100)
drop_pos = (400,400)
xax=''
def on_touch_up(self,touch):
app = self.manager.get_screen('General')
print('use get',app.ids['btn'].text)
print('use variable',self.xax)
KV = Builder.load_string("""
WindowManager:
MenuWindow:
GeneralWindow:
<MenuWIndow>:
name: 'Menu'
RelativeLayout:
Button:
allow_stretch: True
keep_ratio: True
size_hint: None,None
id: general_select_button
text: 'move to general mode'
size: root.General_select_button_size
pos: root.General_select_button_pos
on_release:
app.root.current = "General"
root.manager.transition.direction = "left"
<GeneralWindow>:
name: 'General'
RelativeLayout:
Button:
allow_stretch: True
keep_ratio: True
size_hint: None,None
id: btn
text: 'select number'
size: root.drop_size
pos: root.drop_pos
on_parent: drop_content.dismiss()
on_release:
drop_content.open(self)
root.xax=btn.text
DropDown:
id: drop_content
on_select: btn.text = '{}'.format(args[1])
Button:
id: btn1
text: '1'
size_hint_y: None
height: 30
on_release: drop_content.select('1')
Button:
id: btn2
text:'2'
size_hint_y: None
height: 30
on_release: drop_content.select('2')
Button:
id: btn3
text: '3'
size_hint_y: None
height: 30
on_release: drop_content.select('3')
Button:
id: btn4
text: '4'
size_hint_y: None
height: 30
on_release: drop_content.select('4')
""")
class ImageChangeApp(App):
def build(self):
return KV
if __name__ == '__main__':
ImageChangeApp().run()
'''

Kivy - ScreenManager saying it does not recognize another screen name despite it being there?

So, I wanted to create an app that created tasks/habits in kivy. Basically, there would be a screen that shows you your tasks/habits, and you could click on a button to take you to another screen to create a new task/habit. You would input information about the task/habit in that screen, and click the submit button. The submit button would add the task/habit to the first screen. However, when I run my code, it works the first time. I can go to the second screen, add my habit/code and then go back to the first screen. However, when I click the button on the first screen, it gives me an error.
The error being: kivy.uix.screenmanager.ScreenManagerException: No Screen with name "second".
Here is my code:
main.py:
from kivy.lang import Builder
from kivy.properties import ObjectProperty
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label
from kivy.uix.widget import Widget
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.image import Image
from PIL import Image
import numpy as np
class FirstWindow(Screen):
def add_label(self, name, time, date):
label = Label(text= f' {name}, {time}, {date}')
self.ids.boxlayout.add_widget(label)
class SecondWindow(Screen):
a_task = False
a_habit = False
name = ""
time = ""
date = ""
def task_button(self):
self.a_task = True
self.a_habit = False
def habit_button(self):
self.a_habit = True
self.a_task = False
def submit_button(self):
self.name = self.ids.the_name.text
self.time = f'{self.ids.time_spinner_1.text}:{self.ids.time_spinner_2.text}'
self.date = f'{self.ids.date_spinner_1.text}/{self.ids.date_spinner_2.text}'
def get_name(self):
return self.name
def get_time(self):
return self.time
def get_date(self):
return self.date
kv = Builder.load_file('Button.kv')
class ButtonApp(App):
def build(self):
sm = ScreenManager()
sm.add_widget(FirstWindow())
sm.add_widget(SecondWindow())
return sm
if __name__ == '__main__':
ButtonApp().run()
Button.kv:
<FirstWindow>:
name: "first"
BoxLayout:
id: boxlayout
orientation: "vertical"
canvas.before:
Color:
rgba: (0.3,0.33,0.3,1)
Rectangle:
pos: self.pos
size: self.size
FloatLayout:
Label:
text: "To Do List"
font_size: 32
pos_hint: { 'right': 0.65, 'top': 1.4 }
Button:
text: "add a task"
on_release: root.manager.current = "second"
<SecondWindow>:
name: "second"
BoxLayout:
orientation: "vertical"
spacing: "10dp"
canvas.before:
Color:
rgba: (0.3,0.33,0.3,1)
Rectangle:
pos: self.pos
size: self.size
FloatLayout:
Label:
text: "Add A Task"
font_size: 32
pos_hint: { 'right': 0.65, 'top': 1.2 }
BoxLayout:
orientation: "horizontal"
Button:
text: "task"
on_press: root.task_button()
Button:
text: "habit"
on_press: root.habit_button()
TextInput:
id: the_name
text: "Name"
Label:
text: "alert"
BoxLayout:
orientation: "horizontal"
Spinner:
id: time_spinner_1
text: "00"
values: ['1','2','3','4','5','6','7','8','9','10','11', '12']
Spinner:
id: time_spinner_2
text: "00"
values: ['01','02','03','04','05','06','07','08','09','10','11', '12', '13','14','15','16','17','18','19','20','21','22','23','24','25','26','27','28','29','30','31','32','33','34','35','36','37','38','39','40','41','42','43','44','45','46','47','48','49','50','51','52','53','54','55','56','57','58','59']
BoxLayout:
orientation: "horizontal"
Spinner:
id: date_spinner_1
text: "00"
values: ['1','2','3','4','5','6','7','8','9','10','11', '12']
Spinner:
id: date_spinner_2
text: "00"
values: ['01','02','03','04','05','06','07','08','09','10','11', '12', '13','14','15','16','17','18','19','20','21','22','23','24','25','26','27','28','29','30','31']
Button:
text: "submit"
on_press: root.submit_button()
on_release:
root.manager.current = "first"
root.manager.get_screen("first").add_label(root.get_name(), root.get_time(), root.get_date())

Your code:
def submit_button(self):
self.name = self.ids.the_name.text
self.time = f'{self.ids.time_spinner_1.text}:{self.ids.time_spinner_2.text}'
self.date = f'{self.ids.date_spinner_1.text}/{self.ids.date_spinner_2.text}'
changes the name property of the SecondWindow Screen, so trying to change Screen to the second will no longer work. It looks like you are trying to use name for some other purpose. I suggest you use a variable with a different name.

How to create an buttonloop with parameter in kivy, after the GUI has generated?

I have an problem with the Kivy-Libaray. I' m currently writing the front end, for a ShoppinglistApp. I have an main menu, where you can select what you want to do(add List/ Shop) from where you can get to the Shop selection.
In the shop selection Menu are 4 Shops.
all Items(Produkt) are stored in a list.
If you select the Shop, then for each Item(from this Shop) a Button should be created.
I tired this solution:
from kivy.app import App
from kivy.metrics import dp
from kivy.lang import Builder
from kivy.properties import StringProperty
from kivy.uix.stacklayout import StackLayout
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.screenmanager import ScreenManager, Screen
# the rest
class Produkt:
def __init__(self, name, amount, market):
self.name = name
self.amount = amount
self.market = market
eklist = []
for i in range(0, 100):
nn = "Banane" + str(i)
eklist.append(Produkt(nn, 0, "Baumarkt"))
# Define Screens
class FirstWindow(Screen):
pass
class SecondWindow(Screen):
pass
class ThirdWindow(Screen):
pass
class WindowManager(ScreenManager):
pass
"""Anfang der Chose"""
class Box(BoxLayout):
pass
# Gvar is a class I created for the purpose of transporting variable(s). Especially the selected shop.
class Gvar:
def __init__(self, var1):
self.var1 = var1
def get(self):
return self.var1
gvar = Gvar("default")
# SetBox ist the Class for changing the variable through the shop selection menu.
class SetBox(BoxLayout):
def set(self, market):
gvar.var1 = market
print("Set")
print(gvar.var1)
class BLE(BoxLayout):
pass
# This is the Menus which makes Problems.
class SLE(StackLayout):
def __init__(self, **kwargs):
super().__init__(**kwargs)
for p in eklist:
# In theory, this if request should always be triggerd. In praxis, I made the else Request to debug.
# for Text normally would appear p.name, but I changed it for debugging. Text shown(gvar.var1) is "default".
if p.market == str(gvar.get()):
b = Button(text=str(gvar.get()), size_hint=(None, None), color="blue", size=(dp(200), dp(100)),
on_press=lambda *args: self.test1(*args, str(p.name)))
b.prod = p
self.add_widget(b)
else:
b = Button(text=str(gvar.get()), size_hint=(None, None), color="green", size=(dp(200), dp(100)),
on_press=lambda *args: self.test1(*args, str(p.name)))
b.prod = p
self.add_widget(b)
market = None
# test 1 is a placeholder for a Backend funktion
# Here I print the Produkt and gvar.var1, to debug. Here it get for gvar.var1 the in the GUI selected Value.
def test1(self, b, i):
print("Initialize test2, please wait...")
print(b.prod.name, b.prod.amount, b.prod.market, gvar.var1)
"""Ende der Chose"""
kv = Builder.load_file('einkaufsliste.kv')
class EinkaufsApp(App):
def build(self):
return kv
if __name__ == '__main__':
EinkaufsApp().run()
+
Here is the Kivy file.
WindowManager:
FirstWindow:
SecondWindow:
ThirdWindow:
&ltFirstWindow&gt:
name: "first"
Box:
orientation: "vertical"
size :root.width, root.height
Label:
text: "Hauptmenü"
size_hint: 1, .2
font_size: 32
Button:
text: "Einkaufen"
font_size: 32
background_normal: ' '
background_color: "#666e00"
on_release:
app.root.current = "third"
root.manager.transition.direction = "left"
Button:
text: "Einkaufsliste updaten"
font_size: 32
background_normal: ' '
background_color: "#660000"
on_release:
app.root.current = "second"
root.manager.transition.direction = "left"
&ltSecondWindow&gt:
name: "second"
BLE:
id: BLE
orientation: "vertical"
Button:
text: "to first"
size_hint: 1, .1
font_size: 24
on_release:
app.root.current = "first"
root.manager.transition.direction = "right"
TextInput:
multiline: False
size_hint: 1, .1
SVE:
&ltThirdWindow&gt:
name: "third"
SetBox:
orientation: "vertical"
size :root.width, root.height
id:SetBox
Box:
orientation: "horizontal"
size_hint: 1, .4
Button:
text: "to first"
size_hint: .2, 1
font_size: 24
on_release:
app.root.current = "first"
root.manager.transition.direction = "right"
Label:
text: "Markt auswählen"
size_hint: .8, 1
font_size: 32
Button:
text: "Supermarkt"
font_size: 32
background_normal: ' '
background_color: "#a1b2e3"
on_release:
app.root.current = "second"
root.manager.transition.direction = "left"
on_press: SetBox.set("Supermarkt")
Button:
text: "Drogerie"
font_size: 32
background_normal: ' '
background_color: "#c7bbc9"
on_release:
app.root.current = "second"
root.manager.transition.direction = "left"
on_press: SetBox.set("Drogerie")
Button:
text: "Baumarkt"
font_size: 32
background_normal: ' '
background_color: "#b4eeb4"
on_release:
app.root.current = "second"
root.manager.transition.direction = "left"
on_press: SetBox.set("Baumarkt")
Button:
text: "Elektrogerätefachhandel"
font_size: 32
background_normal: ' '
background_color: "#f4c2c2"
on_release:
app.root.current = "second"
root.manager.transition.direction = "left"
on_press: SetBox.set("Elektrogerätefachhandel")
&ltSVE#ScrollView&gt:
SLE:
id: Scrollwin
size_hint: 1, None
height: self.minimum_height
&ltSLE&gt:
# orientation: "rl-bt"
# spacing: "1dp", "1dp"
</code></pre>
I think the Problem is, that kivy creates the whole GUI before I can change the variable.
Is there a way to reload the Screen or do I have to make for each market/shop another Screen?

It's possible to do what you want. You have to add the items to the corresponidng layout. I'll give you an example with a project I did some time ago:
class ExmapleApp(App):
def build(self):
#Create GridLayout where you will add and remove widgets
self.gridRooms = gridRooms = GridLayout(cols=10, padding=10, spacing=10,
row_force_default=True, row_default_height=50, size_hint_y=None)
gridRooms.bind(minimum_height=gridRooms.setter('height'))
# Generate 10 Rooms items
for i in range(10):
labl = NewLabel() #Instace of NewLabel
labl.num = str(i+1) #Number of room
labl.roomName = "Room "+str(labl.num) # Room name
labl.filename = '12916_sweet_trip_mm_kwik_mod_01.wav'
roomsList.append(labl) #This add the room to a list for further reference
gridRooms.add_widget(labl) #This add the rooms to a grid
Here's an image of how it looks so far:
Finally, you can add widgets to that GridLayout:
#Create the object you want to Add
labl = NewLabel() #Instace of NewLabel
labl.num = str(11) #Number of room
labl.roomName = "Room "+str(labl.num) # Room name
labl.filename = '12916_sweet_trip_mm_kwik_mod_01.wav'
roomsList.append(labl) #This add the room to a list for further reference
#This add the widgets 3 secs after the program starts
Clock.schedule_once(lambda x: gridRooms.add_widget(roomsList[10]), 3) #Add room 11
You can even have a callback to create a new widget everytime you press a button.
To remove a widget just:
gridRooms.remove_widget(roomsList[10]) #Removes Room 11

Python Kivy. My program should append the textfile, but is does not

Textfile should look like this :
e.g
Walking 61.0/2018-09-04 79.0/2018-10-04
Running 24.0/2018-09-04 33.0/2018-10-04
The point of this function is to append the textfile with the new value of the slider or to change one.
There are some names for the slider and each of them can have many values which consist of a slider.value and the current date. If today is not the date of the last value - then we append the file.
If today is the same date as the date of the last value - then it is supposed to change it(I did not do it yet, but this is not a problem, i will do it myself after I solve this problem).
Here is the full Python file and Kivy files, nothing but def save_values matters. Everything else is just to make the program working for you.
Python
from kivy.app import App
import time
import datetime
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.lang import Builder
from kivy.uix.slider import Slider
from kivy.uix.widget import Widget
from kivy.uix.textinput import TextInput
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition
from kivy.config import Config
screen_width = 450
screen_height = 800
Config.set("graphics", "resizable","1")
Config.set("graphics", "width", screen_width)
Config.set("graphics", "height", screen_height)
languages = ["Reading","Writing","Running","Climbing"]
spawned_List = ["False"]
class MenuScreen(Screen):
pass
class JobChoiceScreen(Screen):
def changing_screen(self, instance, *args):
self.manager.current= "sliderScreen"
screenSlider = self.manager.get_screen('sliderScreen')
text = str(instance.text)
screenSlider.changing_label(text)
def on_pre_enter(self, *args):
if spawned_List[0] == "False":
for x in range(0,len(languages)):
word = languages[x]
word = str(word)
btn = Button(text = word, size_hint=(None, None), size = (140,70),
font_size = 18, bold = True, color = [0,1,1,1], background_color = (.156, .172, .24, 0.7),
on_release = self.changing_screen)
self.ids.container.add_widget(btn)
spawned_List[0] = "True"
self.ids.boxLayBottom.add_widget(Widget(size_hint=(1, .4)))
self.ids.datesContainer.add_widget(Button(text = "Day back", size_hint=(.28, 1), font_size = 18, bold = True, color = [0,1,1,1], background_color = (.176, .192, .44, 0.7)))
self.ids.datesContainer.add_widget(Widget(size_hint=(.44, 1)))
self.ids.datesContainer.add_widget(Button(text = "Day forward", size_hint=(.28, 1), font_size = 18, bold = True, color = [0,1,1,1], background_color = (.176, .192, .44, 0.7)))
class SliderScreen(Screen):
def save_values(self, *args, **kwargs):
date = (datetime.datetime.now().strftime("%y-%m-%d"))
written = (str(self.ids.my_slider.value)+ "/" + date + " ")
print("started save_values")
with open('values.txt', 'r') as fileValues:
lines = fileValues.readlines()
print("opened the file")
with open('values.txt', 'a') as fileValues:
for i, line in enumerate(lines):
if line.startswith(self.ids.my_label.text) and line.find(date) == -1:
line = line + ((self.ids.my_label.text) + " " + written)
print(line)
if not line.startswith(self.ids.my_label.text) and line.find(date) == -1:
line = (" " + written)
print(line)
print("hello bill")
def changing_label(self, text):
self.ids.my_label.text = text
class ScreenManagement(ScreenManager):
pass
presentation = Builder.load_file("manager.kv")
class MainApp(App):
def build(self):
return presentation
if __name__ == "__main__":
MainApp().run()
Kivy
ScreenManagement:
#transition: FadeTransition()
MenuScreen:
JobChoiceScreen:
SliderScreen:
<MenuScreen>:
canvas:
Rectangle:
source:"background.jpg"
pos: self.pos
size: self.size
name: "menu"
BoxLayout:
padding: [10,10,10,10]
orientation: "vertical"
Widget:
size_hint: [1,0.2]
BoxLayout:
Button:
bold: True
color: [0,1,1,1]
on_release: app.root.current = "list_of_jobs"
text: "Change"
size_hint: [0.28,1]
font_size: 20
background_color: (.156, .172, .24, 0.7)
Widget:
size_hint: [0.44,1]
Button:
bold: True
color: [.5,0, .8, .7]
text: "View \n Progress"
size_hint: [0.28,1]
font_size: 20
halign: "center"
valign: "center"
background_color: (.156, .172, .24, 0.7)
on_release: app.root.current = "sliderScreen"
Widget:
size_hint: [1,0.2]
<JobChoiceScreen>:
canvas:
Rectangle:
source:"background.jpg"
pos: self.pos
size: self.size
name: "list_of_jobs"
BoxLayout:
orientation: "vertical"
padding: [10,10,10,10]
BoxLayout:
orientation: "vertical"
id: boxLayBottom
size_hint: (1,.1)
BoxLayout:
id: datesContainer
orientation: "horizontal"
size_hint: (1,.6)
AnchorLayout:
anchor_x: "center"
acnhor_y: "top"
size_hint: (1,.8)
GridLayout:
id: container
cols: 3
spacing: 5
BoxLayout:
orientation: "vertical"
id: boxContainer
size_hint: (1,.1)
Button:
text: "Back to Menu"
on_release: app.root.current = "menu"
bold: True
color: [0,1,1,1]
background_color: (.176, .192, .44, 0.7)
<SliderScreen>:
canvas:
Rectangle:
source:"background.jpg"
pos: self.pos
size: self.size
name: "sliderScreen"
BoxLayout:
padding: [10,10,10,10]
orientation: "vertical"
id: my_label_container
Slider:
id: my_slider
min: 0
max: 100
value: 0
orientation: "vertical"
size_hint: [1, 0.7]
step: 1
Label:
id: my_label
size_hint: [1, 0.2]
bold: True
font_size: 40
text: ""
Button:
size_hint: [1, 0.1]
bold: True
on_release: app.root.current = "menu"
text : "Back Home"
font_size: 20
halign: "center"
valign: "center"
background_color: (.156, .172, .24, 0.7)
on_press: root.save_values()
def save_values
def save_values(self, *args, **kwargs):
date = (datetime.datetime.now().strftime("%y-%m-%d"))
written = (str(self.ids.my_slider.value)+ "/" + date + " ")
print("started save_values")
with open('values.txt', 'r') as fileValues:
lines = fileValues.readlines()
print("opened the file")
with open('values.txt', 'a') as fileValues:
for i, line in enumerate(lines):
if line.startswith(self.ids.my_label.text) and line.find(date) == -1:
line = line + ((self.ids.my_label.text) + " " + written)
print(line)
if not line.startswith(self.ids.my_label.text) and line.find(date) == -1:
line = (" " + written)
print(line)
print("hello bill")

I see two problems with your code:
In your save_values() method, You are opening the values.txt file twice at the same time with the same name, but with different modes. I think you need to unindent the second with open block, remove the second with open statement, and modify the mode in the first with open statement to r+. So your code should look something like:
with open('values.txt', 'r+') as fileValues:
lines = fileValues.readlines()
print("opened the file")
for i, line in enumerate(lines):
You never call any write routine, so nothing gets written. When you want to append line/lines to values.txt, you need to call fileValues.write() or fileValues.writelines().
I have not looked at your code logic, so I will not comment on that.

Search Box with suggestions in kivy?

I am new to kivy wanted to know how we can bind textinput box to suggestion so that user and touch and select the suggestions.
I have long list of buttons out of which i want to select on the basis of name.

i am using kivymd i dont real know how to do it in kivy but here are the codes for kivymd
from kivy.lang import Builder
from kivy.properties import StringProperty
from kivy.uix.screenmanager import Screen
from kivymd.icon_definitions import md_icons
from kivymd.app import MDApp
from kivymd.uix.list import OneLineIconListItem
Builder.load_string(
'''
#:import images_path kivymd.images_path
<CustomOneLineIconListItem>:
IconLeftWidget:
icon: root.icon
<PreviousMDIcons>:
BoxLayout:
orientation: 'vertical'
spacing: dp(10)
padding: dp(20)
BoxLayout:
size_hint_y: None
height: self.minimum_height
MDIconButton:
icon: 'magnify'
MDTextField:
id: search_field
hint_text: 'Search icon'
on_text: root.set_list_md_icons(self.text, True)
RecycleView:
id: rv
key_viewclass: 'viewclass'
key_size: 'height'
RecycleBoxLayout:
padding: dp(10)
default_size: None, dp(48)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
'''
)
class CustomOneLineIconListItem(OneLineIconListItem):
icon = StringProperty()
class PreviousMDIcons(Screen):
def set_list_md_icons(self, text="", search=False):
'''Builds a list of icons for the screen MDIcons.'''
def add_icon_item(name_icon):
self.ids.rv.data.append(
{
"viewclass": "CustomOneLineIconListItem",
"icon": name_icon,
"text": name_icon,
"callback": lambda x: x,
}
)
self.ids.rv.data = []
for name_icon in md_icons.keys():
if search:
if text in name_icon:
add_icon_item(name_icon)
else:
add_icon_item(name_icon)
class MainApp(MDApp):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.screen = PreviousMDIcons()
def build(self):
return self.screen
def on_start(self):
self.screen.set_list_md_icons()
MainApp().run()
some results
here is the screen shot result when your not searching for anything
here is a screen shot when i am trying to search
second
here is a result when the word am searching does not exist

Here is a simple example that will use the use text input to search in the option_list and will display the suggestion under the text input widget.
I used the kivymd widget to get a nice look design you replaced with the normal kivy widgets if you want
from kivy.properties import ListProperty
from kivymd.app import MDApp
from kivymd.uix.list import OneLineAvatarIconListItem
from kivymd.uix.textfield import MDTextField
kv = """
Screen:
BoxLayout:
orientation: 'vertical'
spacing: 1
BoxLayout:
size_hint_y: 1/5
canvas.before:
Color:
rgba: 0, 0, 0, 1
Rectangle:
pos: self.pos
size: self.size[0], 2
MDIconButton:
icon: 'magnify'
size_hint_y: 1
SearchTextInput:
id: Search_TextInput_id
size_hint_y: .97
pos_hint:{ 'left':0 , 'top': 1}
hint_text: 'search'
hint_text_color: 1,1,1,1
icon_left: 'magnify'
mode: "fill"
helper_text_mode: "persistent"
helper_text: "Search"
line_color: [1,1,1,1]
color_normal: [1,1,1,1]
font_size: .35 * self.height
active_line: False
multiline: False
MDIconButton:
icon: 'close'
size_hint_y:1
text_color: 0,0,0,1
BoxLayout:
orientation: 'vertical'
padding: 4
RecycleView:
viewclass: 'Search_Select_Option'
data:app.rv_data
RecycleBoxLayout:
spacing: 15
padding : 10
default_size: None, None
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
<Search_Select_Option>:
on_release: print(self.text)
IconRightWidget:
icon: "arrow-top-left"
"""
class Search_Select_Option(OneLineAvatarIconListItem):
pass
class SearchTextInput(MDTextField):
option_list = 'one1,two1,two2,three1,three2,three3,four1,four2,four3,four4,five1,five2,five3,five4,five5'.split(',')
def on_text(self, instance, value):
app = MDApp.get_running_app()
option_list = list(set(self.option_list + value[:value.rfind(' ')].split(' ')))
val = value[value.rfind(' ') + 1:]
if not val:
return
try:
app.option_data = []
for i in range(len(option_list)):
word = [word for word in option_list if word.startswith(val)][0][len(val):]
if not word:
return
if self.text + word in option_list:
if self.text + word not in app.option_data:
popped_suggest = option_list.pop(option_list.index(str(self.text + word)))
app.option_data.append(popped_suggest)
app.update_data(app.option_data)
except IndexError:
pass
class RVTestApp(MDApp):
rv_data = ListProperty()
def update_data(self, rv_data_list):
self.rv_data = [{'text': item} for item in rv_data_list]
print(self.rv_data, 'update')
def build(self):
return Builder.load_string(kv)
RVTestApp().run()

Incase anyone is wondering how can get the value of the selected item from the list, I have a little updated version here:
from kivymd.icon_definitions import md_icons
from kivy.lang import Builder
from kivymd.app import MDApp
from kivymd.uix.list import OneLineListItem
from kivy.uix.screenmanager import Screen
KV = '''
<ListSelect>
BoxLayout:
orientation: 'vertical'
spacing: dp(10)
padding: dp(20)
pos_hint:{'center_x': 0.5, 'y': 0.85}
BoxLayout:
size_hint_y: None
height: self.minimum_height
MDIconButton:
icon: 'magnify'
MDTextField:
id: search_field
hint_text: 'Search icon'
on_text:
root.set_list(self.text)
RecycleView:
pos_hint:{'center_x': 0.5, 'center_y': 0.4}
MDList:
id: container
'''
class ListSelect(Screen):
def pressed(self, value):
# value here is the OneLineListItem
self.ids.container.clear_widgets()
# set TextField text to selected list item
self.ids.search_field.text = value.text
print(value.text)
def set_list(self, text=" "):
# text defaults to blank space to not show any icons initally
# each OneLineListItem takes the pressed func on press
self.ids.container.clear_widgets() # refresh list
for icon in md_icons.keys():
# using casefold() to make the input case insensitve
if icon.startswith(text.casefold()):
self.ids.container.add_widget(
OneLineListItem(text=icon, on_press=self.pressed)
)
class Test(MDApp):
def build(self):
Builder.load_string(KV)
self.screen = ListSelect()
return self.screen
def on_start(self):
self.screen.set_list()
Test().run()
One catch: the search needs quite a long time to finish. If anyone has any hints on how to speed it up, you are very welcome!