Bottom Navigation¶
Bottom navigation bars allow movement between primary destinations in an app:
Usage¶
<Root>>:
MDBottomNavigation:
MDBottomNavigationItem:
name: "screen 1"
YourContent:
MDBottomNavigationItem:
name: "screen 2"
YourContent:
MDBottomNavigationItem:
name: "screen 3"
YourContent:
For ease of understanding, this code works like this:
<Root>>:
ScreenManager:
Screen:
name: "screen 1"
YourContent:
Screen:
name: "screen 2"
YourContent:
Screen:
name: "screen 3"
YourContent:
Example¶
from kivymd.app import MDApp
from kivy.lang import Builder
class Test(MDApp):
def build(self):
self.theme_cls.primary_palette = "Gray"
return Builder.load_string(
'''
BoxLayout:
orientation:'vertical'
MDToolbar:
title: 'Bottom navigation'
md_bg_color: .2, .2, .2, 1
specific_text_color: 1, 1, 1, 1
MDBottomNavigation:
panel_color: .2, .2, .2, 1
MDBottomNavigationItem:
name: 'screen 1'
text: 'Python'
icon: 'language-python'
MDLabel:
text: 'Python'
halign: 'center'
MDBottomNavigationItem:
name: 'screen 2'
text: 'C++'
icon: 'language-cpp'
MDLabel:
text: 'I programming of C++'
halign: 'center'
MDBottomNavigationItem:
name: 'screen 3'
text: 'JS'
icon: 'language-javascript'
MDLabel:
text: 'JS'
halign: 'center'
'''
)
Test().run()
MDBottomNavigationItem provides the following events for use:
__events__ = (
"on_tab_touch_down",
"on_tab_touch_move",
"on_tab_touch_up",
"on_tab_press",
"on_tab_release",
)
See also
See __events__
Root:
MDBottomNavigation:
MDBottomNavigationItem:
on_tab_touch_down: print("on_tab_touch_down")
on_tab_touch_move: print("on_tab_touch_move")
on_tab_touch_up: print("on_tab_touch_up")
on_tab_press: print("on_tab_press")
on_tab_release: print("on_tab_release")
YourContent:
How to automatically switch a tab?¶
Use method switch_tab which takes as argument
the name of the tab you want to switch to.