It is not possible to use MDNavigationRailItem in python code

[bibibo-77]

Hello, I try to use MDNavigationRailItem in Python code = it means without KV language but it is not possible. A lot of errors appear. If i use the code without MDNavigationRailItem class everything works fine.

from kivymd.app import MDApp
from kivymd.uix.label import MDLabel
from kivymd.uix.boxlayout import MDBoxLayout
from kivymd.uix.floatlayout import MDFloatLayout
from kivymd.uix.toolbar import MDToolbar
from geocoder.api import elevation

class MyApp(MDApp):
    def build(self):
        boxlayout1 = MDBoxLayout(orientation = "vertical")
        toolbar = MDToolbar(title = "Hello")
        boxlayout1.add_widget(toolbar)
        boxlayout2 = MDBoxLayout()
        boxlayout1.add_widget(boxlayout2)
        
        from kivymd.uix.navigationrail import MDNavigationRail, MDNavigationRailItem
        navigationrail = MDNavigationRail()
        navigationrail.add_widget(MDNavigationRailItem())        
        boxlayout2.add_widget(navigationrail)
        
        return boxlayout1

root = MyApp()
root.run()

Versions

• OS: macOS 11.2.2
• Python: 3.7.6
• Kivy: 2.0.0
• KivyMD: 0.104.2.dev0

[alex-conanec]

Try this

from kivymd.app import MDApp
from kivymd.uix.label import MDLabel
from kivymd.uix.boxlayout import MDBoxLayout
from kivymd.uix.floatlayout import MDFloatLayout
from kivymd.uix.toolbar import MDToolbar
from kivy.utils import get_color_from_hex 

class MyApp(MDApp):
    def build(self):
        boxlayout1 = MDBoxLayout(orientation = "vertical")
        toolbar = MDToolbar(title = "Hello")
        boxlayout1.add_widget(toolbar)
        boxlayout2 = MDBoxLayout()
        boxlayout1.add_widget(boxlayout2)
        
        from kivymd.uix.navigationrail import MDNavigationRail, MDNavigationRailItem
        navigationrail = MDNavigationRail(
                md_bg_color = get_color_from_hex("#344954"),
                # color_normal = get_color_from_hex("#718089"), #crash the app when clicking on an item, don't understand why...
                color_active = get_color_from_hex("#f3ab44"),
                visible = "Persistent")
        for i in range(3):
            item = MDNavigationRailItem(navigation_rail = navigationrail, text="item%d" %(i+1))
            navigationrail.add_widget(item)        
        boxlayout2.add_widget(navigationrail)
        
        return boxlayout1

root = MyApp()
root.run()

[HeaTTheatR]

Fix in master branch.