mirror of
https://github.com/liberatedsystems/Sideband_CE.git
synced 2024-09-03 04:13:27 +02:00
863 lines
26 KiB
Python
Executable File
863 lines
26 KiB
Python
Executable File
"""
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Components/BottomNavigation
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===========================
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.. seealso::
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`Material Design 2 spec, Bottom navigation <https://material.io/components/bottom-navigation>`_ and
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`Material Design 3 spec, Bottom navigation <https://m3.material.io/components/navigation-bar/overview>`_
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.. rubric:: Bottom navigation bars allow movement between primary destinations in an app:
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/bottom-navigation.png
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:align: center
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Usage
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-----
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.. code-block:: kv
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<Root>
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MDBottomNavigation:
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MDBottomNavigationItem:
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name: "screen 1"
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YourContent:
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MDBottomNavigationItem:
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name: "screen 2"
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YourContent:
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MDBottomNavigationItem:
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name: "screen 3"
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YourContent:
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For ease of understanding, this code works like this:
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.. code-block:: kv
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<Root>
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ScreenManager:
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Screen:
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name: "screen 1"
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YourContent:
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Screen:
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name: "screen 2"
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YourContent:
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Screen:
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name: "screen 3"
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YourContent:
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Example
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-------
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.. tabs::
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.. tab:: Declarative KV style
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.. code-block:: python
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from kivy.lang import Builder
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from kivymd.app import MDApp
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class Test(MDApp):
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def build(self):
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self.theme_cls.material_style = "M3"
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self.theme_cls.theme_style = "Dark"
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return Builder.load_string(
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'''
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MDScreen:
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MDBottomNavigation:
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#panel_color: "#eeeaea"
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selected_color_background: "orange"
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text_color_active: "lightgrey"
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MDBottomNavigationItem:
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name: 'screen 1'
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text: 'Mail'
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icon: 'gmail'
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badge_icon: "numeric-10"
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MDLabel:
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text: 'Mail'
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halign: 'center'
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MDBottomNavigationItem:
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name: 'screen 2'
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text: 'Twitter'
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icon: 'twitter'
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badge_icon: "numeric-5"
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MDLabel:
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text: 'Twitter'
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halign: 'center'
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MDBottomNavigationItem:
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name: 'screen 3'
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text: 'LinkedIN'
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icon: 'linkedin'
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MDLabel:
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text: 'LinkedIN'
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halign: 'center'
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'''
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)
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Test().run()
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.. tab:: Declarative python style
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.. code-block:: python
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from kivymd.app import MDApp
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from kivymd.uix.bottomnavigation import MDBottomNavigation, MDBottomNavigationItem
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from kivymd.uix.label import MDLabel
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from kivymd.uix.screen import MDScreen
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class Test(MDApp):
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def build(self):
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self.theme_cls.material_style = "M3"
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self.theme_cls.theme_style = "Dark"
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return (
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MDScreen(
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MDBottomNavigation(
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MDBottomNavigationItem(
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MDLabel(
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text='Mail',
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halign='center',
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),
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name='screen 1',
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text='Mail',
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icon='gmail',
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badge_icon="numeric-10",
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),
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MDBottomNavigationItem(
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MDLabel(
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text='Twitter',
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halign='center',
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),
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name='screen 1',
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text='Twitter',
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icon='twitter',
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badge_icon="numeric-10",
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),
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MDBottomNavigationItem(
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MDLabel(
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text='LinkedIN',
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halign='center',
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),
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name='screen 1',
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text='LinkedIN',
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icon='linkedin',
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badge_icon="numeric-10",
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),
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selected_color_background="orange",
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text_color_active="lightgrey",
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)
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)
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)
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Test().run()
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/bottom-navigation.gif
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:align: center
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.. rubric:: :class:`~MDBottomNavigationItem` provides the following events for use:
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.. code-block:: python
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__events__ = (
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"on_tab_touch_down",
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"on_tab_touch_move",
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"on_tab_touch_up",
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"on_tab_press",
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"on_tab_release",
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)
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.. code-block:: kv
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Root:
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MDBottomNavigation:
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MDBottomNavigationItem:
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on_tab_touch_down: print("on_tab_touch_down")
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on_tab_touch_move: print("on_tab_touch_move")
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on_tab_touch_up: print("on_tab_touch_up")
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on_tab_press: print("on_tab_press")
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on_tab_release: print("on_tab_release")
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YourContent:
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How to automatically switch a tab?
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----------------------------------
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Use method :attr:`~MDBottomNavigation.switch_tab` which takes as argument
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the name of the tab you want to switch to.
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Use custom icon
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---------------
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.. code-block:: kv
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MDBottomNavigation:
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MDBottomNavigationItem:
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icon: "icon.png"
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/bottom-navigation-custom-icon.png
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:align: center
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"""
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__all__ = (
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"TabbedPanelBase",
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"MDBottomNavigationItem",
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"MDBottomNavigation",
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"MDTab",
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)
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import os
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from typing import Union
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from kivy.animation import Animation
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from kivy.clock import Clock
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from kivy.core.window import Window
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from kivy.core.window.window_sdl2 import WindowSDL
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from kivy.lang import Builder
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from kivy.metrics import dp, sp
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from kivy.properties import (
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BooleanProperty,
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ColorProperty,
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ListProperty,
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NumericProperty,
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ObjectProperty,
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StringProperty,
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)
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from kivy.uix.behaviors import ButtonBehavior
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from kivy.uix.boxlayout import BoxLayout
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from kivy.uix.screenmanager import FadeTransition, ScreenManagerException
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from kivymd import uix_path
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from kivymd.material_resources import STANDARD_INCREMENT
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from kivymd.theming import ThemableBehavior, ThemeManager
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from kivymd.uix.anchorlayout import MDAnchorLayout
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from kivymd.uix.behaviors import CommonElevationBehavior, DeclarativeBehavior
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from kivymd.uix.behaviors.backgroundcolor_behavior import (
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SpecificBackgroundColorBehavior,
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)
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from kivymd.uix.floatlayout import MDFloatLayout
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from kivymd.uix.screen import MDScreen
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from kivymd.utils.set_bars_colors import set_bars_colors
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with open(
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os.path.join(uix_path, "bottomnavigation", "bottomnavigation.kv"),
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encoding="utf-8",
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) as kv_file:
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Builder.load_string(kv_file.read())
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class MDBottomNavigationHeader(
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ThemableBehavior, ButtonBehavior, MDAnchorLayout
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):
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panel_color = ColorProperty([1, 1, 1, 0])
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"""
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Panel color of bottom navigation.
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:attr:`panel_color` is an :class:`~kivy.properties.ColorProperty`
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and defaults to `[1, 1, 1, 0]`.
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"""
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tab = ObjectProperty()
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"""
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:attr:`tab` is an :class:`~MDBottomNavigationItem`
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and defaults to `None`.
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"""
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panel = ObjectProperty()
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"""
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:attr:`panel` is an :class:`~MDBottomNavigation`
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and defaults to `None`.
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"""
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active = BooleanProperty(False)
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text = StringProperty()
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"""
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:attr:`text` is an :class:`~MDTab.text`
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and defaults to `''`.
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"""
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text_color_normal = ColorProperty([1, 1, 1, 1])
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"""
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Text color of the label when it is not selected.
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:attr:`text_color_normal` is an :class:`~kivy.properties.ColorProperty`
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and defaults to `[1, 1, 1, 1]`.
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"""
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text_color_active = ColorProperty([1, 1, 1, 1])
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"""
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Text color of the label when it is selected.
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:attr:`text_color_active` is an :class:`~kivy.properties.ColorProperty`
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and defaults to `[1, 1, 1, 1]`.
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"""
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selected_color_background = ColorProperty(None)
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"""
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The background color of the highlighted item when using Material Design v3.
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.. versionadded:: 1.0.0
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:attr:`selected_color_background` is an :class:`~kivy.properties.ColorProperty`
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and defaults to `None`.
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"""
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opposite_colors = BooleanProperty(True)
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_label = ObjectProperty()
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_label_font_size = NumericProperty("12sp")
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_text_color_normal = ColorProperty([1, 1, 1, 1])
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_text_color_active = ColorProperty([1, 1, 1, 1])
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_selected_region_width = NumericProperty(dp(64))
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def __init__(self, panel, tab):
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self.panel = panel
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self.tab = tab
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super().__init__()
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self._text_color_normal = (
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self.theme_cls.disabled_hint_text_color
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if self.text_color_normal == [1, 1, 1, 1]
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else self.text_color_normal
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)
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self._label = self.ids._label
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self._label_font_size = sp(12)
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self.theme_cls.bind(disabled_hint_text_color=self._update_theme_style)
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self.active = False
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def on_press(self) -> None:
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"""Called when clicking on a panel item."""
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if self.theme_cls.material_style == "M2":
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Animation(_label_font_size=sp(14), d=0.1).start(self)
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elif self.theme_cls.material_style == "M3":
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Animation(
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_selected_region_width=dp(64),
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t="in_out_sine",
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d=0,
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).start(self)
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Animation(
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_text_color_normal=self.theme_cls.primary_color
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if self.text_color_active == [1, 1, 1, 1]
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else self.text_color_active,
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d=0.1,
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).start(self)
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def _update_theme_style(
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self, instance_theme_manager: ThemeManager, color: list
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):
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"""Called when the application theme style changes (White/Black)."""
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if not self.active:
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self._text_color_normal = (
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color
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if self.text_color_normal == [1, 1, 1, 1]
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else self.text_color_normal
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)
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class MDTab(MDScreen, ThemableBehavior):
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"""
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A tab is simply a screen with meta information that defines the content
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that goes in the tab header.
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"""
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__events__ = (
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"on_tab_touch_down",
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"on_tab_touch_move",
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"on_tab_touch_up",
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"on_tab_press",
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"on_tab_release",
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)
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"""Events provided."""
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text = StringProperty()
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"""
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Tab header text.
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:attr:`text` is an :class:`~kivy.properties.StringProperty`
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and defaults to `''`.
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"""
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icon = StringProperty("checkbox-blank-circle")
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"""
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Tab header icon.
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:attr:`icon` is an :class:`~kivy.properties.StringProperty`
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and defaults to `'checkbox-blank-circle'`.
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"""
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badge_icon = StringProperty()
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"""
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Tab header badge icon.
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.. versionadded:: 1.0.0
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:attr:`badge_icon` is an :class:`~kivy.properties.StringProperty`
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and defaults to `''`.
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"""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.index = 0
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self.parent_widget = None
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self.register_event_type("on_tab_touch_down")
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self.register_event_type("on_tab_touch_move")
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self.register_event_type("on_tab_touch_up")
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self.register_event_type("on_tab_press")
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self.register_event_type("on_tab_release")
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def on_tab_touch_down(self, *args):
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pass
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def on_tab_touch_move(self, *args):
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pass
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def on_tab_touch_up(self, *args):
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pass
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def on_tab_press(self, *args):
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par = self.parent_widget
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if par.previous_tab is not self:
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if par.previous_tab.index > self.index:
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par.ids.tab_manager.transition.direction = "right"
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elif par.previous_tab.index < self.index:
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par.ids.tab_manager.transition.direction = "left"
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par.ids.tab_manager.current = self.name
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par.previous_tab = self
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def on_tab_release(self, *args):
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pass
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def __repr__(self):
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return f"<MDTab name='{self.name}', text='{self.text}'>"
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class MDBottomNavigationItem(MDTab):
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header = ObjectProperty()
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"""
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:attr:`header` is an :class:`~MDBottomNavigationHeader`
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and defaults to `None`.
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"""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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def animate_header(
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self, bottom_navigation_object, bottom_navigation_header_object
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) -> None:
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if bottom_navigation_object.use_text:
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Animation(_label_font_size=sp(12), d=0.1).start(
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bottom_navigation_object.previous_tab.header
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)
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Animation(
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_selected_region_width=0,
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t="in_out_sine",
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d=0,
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).start(bottom_navigation_header_object)
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Animation(
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_text_color_normal=bottom_navigation_header_object.text_color_normal
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if bottom_navigation_object.previous_tab.header.text_color_normal
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!= [1, 1, 1, 1]
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else self.theme_cls.disabled_hint_text_color,
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d=0.1,
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).start(bottom_navigation_object.previous_tab.header)
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bottom_navigation_object.previous_tab.header.active = False
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self.header.active = True
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def on_tab_press(self, *args) -> None:
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"""Called when clicking on a panel item."""
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bottom_navigation_object = self.parent_widget
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bottom_navigation_header_object = (
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bottom_navigation_object.previous_tab.header
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)
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if bottom_navigation_object.previous_tab is not self:
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self.animate_header(
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bottom_navigation_object, bottom_navigation_header_object
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)
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super().on_tab_press(*args)
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def on_disabled(
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self, instance_bottom_navigation_item, disabled_value: bool
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) -> None:
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self.header.disabled = disabled_value
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def on_leave(self, *args):
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pass
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class TabbedPanelBase(
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ThemableBehavior, SpecificBackgroundColorBehavior, BoxLayout
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):
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"""
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A class that contains all variables a :class:`~kivy.properties.TabPannel`
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must have. It is here so I (zingballyhoo) don't get mad about
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the :class:`~kivy.properties.TabbedPannels` not being DRY.
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"""
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current = StringProperty(None)
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"""
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Current tab name.
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:attr:`current` is an :class:`~kivy.properties.StringProperty`
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and defaults to `None`.
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"""
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previous_tab = ObjectProperty(None, aloownone=True)
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"""
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:attr:`previous_tab` is an :class:`~MDTab` and defaults to `None`.
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"""
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panel_color = ColorProperty(None)
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"""
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Panel color of bottom navigation.
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:attr:`panel_color` is an :class:`~kivy.properties.ColorProperty`
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and defaults to `None`.
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"""
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tabs = ListProperty()
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class MDBottomNavigation(DeclarativeBehavior, TabbedPanelBase):
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"""
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A bottom navigation that is implemented by delegating all items to a
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:class:`~kivy.uix.screenmanager.ScreenManager`.
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:Events:
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:attr:`on_switch_tabs`
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Called when switching tabs. Returns the object of the tab to be
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opened.
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.. versionadded:: 1.0.0
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"""
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transition = ObjectProperty(FadeTransition)
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"""
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Transition animation of bottom navigation screen manager.
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.. versionadded:: 1.1.0
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:attr:`transition` is an :class:`~kivy.properties.ObjectProperty`
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and defaults to `FadeTransition`.
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"""
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transition_duration = NumericProperty(0.2)
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"""
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Duration animation of bottom navigation screen manager.
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.. versionadded:: 1.1.0
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:attr:`transition_duration` is an :class:`~kivy.properties.NumericProperty`
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and defaults to `0.2`.
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"""
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text_color_normal = ColorProperty([1, 1, 1, 1])
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"""
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Text color of the label when it is not selected.
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.. code-block:: kv
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MDBottomNavigation:
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text_color_normal: 1, 0, 1, 1
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/bottom-navigation-text_color_normal.png
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:attr:`text_color_normal` is an :class:`~kivy.properties.ColorProperty`
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and defaults to `[1, 1, 1, 1]`.
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"""
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text_color_active = ColorProperty([1, 1, 1, 1])
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"""
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Text color of the label when it is selected.
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.. code-block:: kv
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MDBottomNavigation:
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text_color_active: 0, 0, 0, 1
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/bottom-navigation-text_color_active.png
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:attr:`text_color_active` is an :class:`~kivy.properties.ColorProperty`
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and defaults to `[1, 1, 1, 1]`.
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"""
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use_text = BooleanProperty(True)
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"""
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Use text for :class:`~MDBottomNavigationItem` or not.
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If ``True``, the :class:`~MDBottomNavigation` panel height will be reduced
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by the text height.
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.. versionadded:: 1.0.0
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/bottom-navigation-use-text.png
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:align: center
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:attr:`use_text` is an :class:`~kivy.properties.BooleanProperty`
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and defaults to `True`.
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"""
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selected_color_background = ColorProperty(None)
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"""
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The background color of the highlighted item when using Material Design v3.
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.. versionadded:: 1.0.0
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.. code-block:: kv
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MDBottomNavigation:
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selected_color_background: 0, 0, 1, .4
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/bottom-navigation=selected-color-background.png
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:attr:`selected_color_background` is an :class:`~kivy.properties.ColorProperty`
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and defaults to `None`.
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"""
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font_name = StringProperty("Roboto")
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"""
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Font name of the label.
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.. versionadded:: 1.0.0
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.. code-block:: kv
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MDBottomNavigation:
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font_name: "path/to/font.ttf"
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/bottom-navigation-font-name.png
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:attr:`font_name` is an :class:`~kivy.properties.StringProperty`
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and defaults to `'Roboto'`.
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"""
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first_widget = ObjectProperty()
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"""
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:attr:`first_widget` is an :class:`~MDBottomNavigationItem`
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and defaults to `None`.
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"""
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tab_header = ObjectProperty()
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"""
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:attr:`tab_header` is an :class:`~MDBottomNavigationHeader`
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and defaults to `None`.
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"""
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set_bars_color = BooleanProperty(False)
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"""
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If `True` the background color of the navigation bar will be set
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automatically according to the current color of the toolbar.
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.. versionadded:: 1.0.0
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:attr:`set_bars_color` is an :class:`~kivy.properties.BooleanProperty`
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and defaults to `False`.
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"""
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widget_index = NumericProperty(0)
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# Text active color if it is selected.
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_active_color = ColorProperty([1, 1, 1, 1])
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def __init__(self, *args, **kwargs):
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self.previous_tab = None
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self.register_event_type("on_switch_tabs")
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super().__init__(*args, **kwargs)
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self.theme_cls.bind(material_style=self.refresh_tabs)
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Window.bind(on_resize=self.on_resize)
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Clock.schedule_once(lambda x: self.on_resize())
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Clock.schedule_once(self.set_status_bar_color)
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def set_status_bar_color(self, interval: Union[int, float]) -> None:
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if self.set_bars_color:
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set_bars_colors(self.panel_color, None, self.theme_cls.theme_style)
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def switch_tab(self, name_tab) -> None:
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"""Switching the tab by name."""
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if not self.ids.tab_manager.has_screen(name_tab):
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raise ScreenManagerException(f"No Screen with name '{name_tab}'.")
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self.ids.tab_manager.get_screen(name_tab).dispatch("on_tab_press")
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count_index_screen = [
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self.ids.tab_manager.screens.index(screen)
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for screen in self.ids.tab_manager.screens
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if screen.name == name_tab
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][0]
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numbers_screens = list(range(len(self.ids.tab_manager.screens)))
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numbers_screens.reverse()
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self.ids.tab_bar.children[
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numbers_screens.index(count_index_screen)
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].dispatch("on_press")
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def refresh_tabs(self, *args) -> None:
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"""Refresh all tabs."""
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if self.ids:
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tab_bar = self.ids.tab_bar
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tab_bar.clear_widgets()
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tab_manager = self.ids.tab_manager
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self._active_color = self.theme_cls.primary_color
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if self.text_color_active != [1, 1, 1, 1]:
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self._active_color = self.text_color_active
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for tab in tab_manager.screens:
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self.tab_header = MDBottomNavigationHeader(tab=tab, panel=self)
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tab.header = self.tab_header
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tab_bar.add_widget(self.tab_header)
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if tab is self.first_widget:
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self.tab_header._text_color_normal = self._active_color
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self.tab_header._label_font_size = sp(14)
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self.tab_header.active = True
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else:
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self.tab_header.ids._label.font_size = sp(12)
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self.tab_header._label_font_size = sp(12)
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def on_font_name(self, instance_bottom_navigation, font_name: str) -> None:
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for tab in self.ids.tab_bar.children:
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tab.ids._label.font_name = font_name
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def on_selected_color_background(
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self, instance_bottom_navigation, color: list
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) -> None:
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def on_selected_color_background(*args):
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for tab in self.ids.tab_bar.children:
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tab.selected_color_background = color
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Clock.schedule_once(on_selected_color_background)
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def on_use_text(
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self, instance_bottom_navigation, use_text_value: bool
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) -> None:
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if not use_text_value:
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for instance_bottom_navigation_header in self.ids.tab_bar.children:
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instance_bottom_navigation_header.ids.item_container.remove_widget(
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instance_bottom_navigation_header.ids._label
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)
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if self.theme_cls.material_style == "M2":
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height = dp(42)
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else:
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height = dp(80)
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self.height = height
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self.ids.bottom_panel.height = height
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self.ids.tab_bar.height = height
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else:
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if self.theme_cls.material_style == "M2":
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height = STANDARD_INCREMENT
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else:
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height = dp(80)
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self.height = height
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self.ids.bottom_panel.height = height
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self.ids.tab_bar.height = height
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def on_text_color_normal(
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self, instance_bottom_navigation, color: list
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) -> None:
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MDBottomNavigationHeader.text_color_normal = color
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for tab in self.ids.tab_bar.children:
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if not tab.active:
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tab._text_color_normal = color
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def on_text_color_active(
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self, instance_bottom_navigation, color: list
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) -> None:
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def on_text_color_active(*args):
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MDBottomNavigationHeader.text_color_active = color
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self.text_color_active = color
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for tab in self.ids.tab_bar.children:
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tab.text_color_active = color
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if tab.active:
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tab._text_color_normal = color
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Clock.schedule_once(on_text_color_active)
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def on_switch_tabs(self, bottom_navigation_item, name_tab: str) -> None:
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"""
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Called when switching tabs. Returns the object of the tab to be opened.
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"""
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def on_size(self, *args) -> None:
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self.on_resize()
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def on_resize(
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self,
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instance: Union[WindowSDL, None] = None,
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width: Union[int, None] = None,
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do_again: bool = True,
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) -> None:
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"""Called when the application window is resized."""
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full_width = 0
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for tab in self.ids.tab_manager.screens:
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full_width += tab.header.width
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tab.header.text_color_normal = self.text_color_normal
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self.ids.tab_bar.width = full_width
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if do_again:
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Clock.schedule_once(lambda x: self.on_resize(do_again=False), 0.1)
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def add_widget(self, widget, **kwargs):
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if isinstance(widget, MDBottomNavigationItem):
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self.widget_index += 1
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widget.index = self.widget_index
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widget.parent_widget = self
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self.ids.tab_manager.add_widget(widget)
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if self.widget_index == 1:
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self.previous_tab = widget
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self.first_widget = widget
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self.refresh_tabs()
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else:
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super().add_widget(widget)
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def remove_widget(self, widget):
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if isinstance(widget, MDBottomNavigationItem):
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self.ids.tab_manager.remove_widget(widget)
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self.refresh_tabs()
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else:
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super().remove_widget(widget)
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def _get_switchig_tab(self, name_tab: str) -> MDBottomNavigationItem:
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bottom_navigation_item = None
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for bottom_navigation_header_instance in self.ids.tab_bar.children:
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if bottom_navigation_header_instance.tab.name == name_tab:
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bottom_navigation_item = bottom_navigation_header_instance.tab
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break
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return bottom_navigation_item
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class MDBottomNavigationBar(
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ThemableBehavior, CommonElevationBehavior, MDFloatLayout
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):
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pass
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