working condition
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parent
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commit
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# NOQA F401
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from .navigationbar import (
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MDNavigationBar,
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MDNavigationItem,
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MDNavigationItemLabel,
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MDNavigationItemIcon,
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)
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<MDNavigationBar>
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size_hint_y: None
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height: "80dp"
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elevation_level: 0
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md_bg_color:
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self.theme_cls.surfaceContainerColor \
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if root.theme_bg_color == "Primary" else \
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root.md_bg_color
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<MDNavigationItemIcon>
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size_hint: None, None
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size: "24sp", "24sp"
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# theme_text_color: "Custom"
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icon_color:
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( \
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( \
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self.theme_cls.onSecondaryContainerColor \
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if self.parent.parent.active else \
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self.theme_cls.onSurfaceVariantColor \
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) \
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if self.theme_icon_color == "Primary" else \
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( \
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self.icon_color_active if self.icon_color_active else \
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( \
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self.theme_cls.onSecondaryContainerColor \
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if self.parent.parent.active else \
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self.theme_cls.onSurfaceVariantColor \
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) \
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) \
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if self.parent.parent.active else \
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( \
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self.icon_color_normal if self.icon_color_normal else \
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( \
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self.theme_cls.onSecondaryContainerColor \
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if self.parent.parent.active else \
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self.theme_cls.onSurfaceVariantColor \
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) \
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) \
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) \
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if self.parent else self.theme_cls.transparentColor
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on_icon:
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if self.icon not in md_icons.keys(): \
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self.size_hint = (None, None); \
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self.width = self.font_size; \
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self.height = self.font_size
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canvas.before:
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Color:
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rgba:
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( \
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( \
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self.theme_cls.secondaryContainerColor \
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if not self.parent.parent.indicator_color else \
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self.parent.parent.indicator_color \
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) \
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if self.parent.parent.active else \
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self.theme_cls.transparentColor \
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) \
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if self.parent else self.theme_cls.transparentColor
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RoundedRectangle:
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radius: [dp(16), ]
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size:
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( \
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(self.parent.parent._selected_region_width, dp(32)) \
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) \
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if self.parent else (0, dp(32))
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pos:
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( \
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(self.center_x - self.parent.parent._selected_region_width / 2, \
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self.center_y - dp(16)) \
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) \
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if self.parent else (0, 0)
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<MDNavigationItemLabel>
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adaptive_size: True
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role: "medium"
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text_color:
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( \
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( \
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self.theme_cls.onSecondaryContainerColor \
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if self.parent.parent.active else \
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self.theme_cls.onSurfaceVariantColor \
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) \
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if self.theme_text_color == "Primary" else \
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( \
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self.text_color_active if self.text_color_active else \
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( \
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self.theme_cls.onSecondaryContainerColor \
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if self.parent.parent.active else \
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self.theme_cls.onSurfaceVariantColor \
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) \
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) \
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if self.parent.parent.active else \
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( \
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self.text_color_normal if self.text_color_normal else \
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( \
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self.theme_cls.onSecondaryContainerColor \
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if self.parent.parent.active else \
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self.theme_cls.onSurfaceVariantColor \
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) \
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) \
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) \
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if self.parent else self.theme_cls.transparentColor
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<MDNavigationItem>
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MDNavigationItemIconContainer:
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id: icon_container
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size_hint: None, None
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size: self.minimum_size
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pos_hint: {"center_x": .5}
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y:
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( \
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(root.parent.height - (self.height + dp(16))) \
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if len(label_container.children) else \
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(root.parent.height / 2 - self.height / 2) \
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) \
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if root.parent else 0
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MDNavigationItemLabelContainer:
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id: label_container
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size_hint: None, None
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size: self.minimum_size
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pos_hint: {"center_x": .5}
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y:
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"16dp" \
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if len(icon_container.children) else \
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( \
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(root.parent.height / 2 - self.height / 2) if root.parent else 0 \
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)
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"""
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Components/Navigation bar
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=========================
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.. seealso::
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`Material Design 3 spec, Navigation bar <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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MDNavigationBar:
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MDNavigationItem:
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MDNavigationItemIcon:
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MDNavigationItemLabel:
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[...]
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Anatomy
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=======
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/navigationbar-item-anatomy.png
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:align: center
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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 kivy.properties import StringProperty
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from kivymd.app import MDApp
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from kivymd.uix.navigationbar import MDNavigationBar, MDNavigationItem
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from kivymd.uix.screen import MDScreen
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class BaseMDNavigationItem(MDNavigationItem):
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icon = StringProperty()
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text = StringProperty()
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class BaseScreen(MDScreen):
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image_size = StringProperty()
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KV = '''
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<BaseMDNavigationItem>
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MDNavigationItemIcon:
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icon: root.icon
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MDNavigationItemLabel:
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text: root.text
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<BaseScreen>
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FitImage:
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source: f"https://picsum.photos/{root.image_size}/{root.image_size}"
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size_hint: .9, .9
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pos_hint: {"center_x": .5, "center_y": .5}
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radius: dp(24)
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MDBoxLayout:
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orientation: "vertical"
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md_bg_color: self.theme_cls.backgroundColor
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MDScreenManager:
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id: screen_manager
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BaseScreen:
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name: "Screen 1"
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image_size: "1024"
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BaseScreen:
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name: "Screen 2"
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image_size: "800"
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BaseScreen:
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name: "Screen 3"
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image_size: "600"
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MDNavigationBar:
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on_switch_tabs: app.on_switch_tabs(*args)
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BaseMDNavigationItem
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icon: "gmail"
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text: "Screen 1"
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active: True
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BaseMDNavigationItem
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icon: "twitter"
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text: "Screen 2"
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BaseMDNavigationItem
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icon: "linkedin"
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text: "Screen 3"
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'''
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class Example(MDApp):
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def on_switch_tabs(
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self,
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bar: MDNavigationBar,
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item: MDNavigationItem,
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item_icon: str,
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item_text: str,
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):
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self.root.ids.screen_manager.current = item_text
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def build(self):
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return Builder.load_string(KV)
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Example().run()
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.. tab:: Declarative python style
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.. code-block:: python
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from kivy.metrics import dp
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from kivy.properties import StringProperty
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from kivymd.uix.fitimage import FitImage
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from kivymd.uix.screen import MDScreen
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from kivymd.uix.screenmanager import MDScreenManager
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from kivymd.uix.boxlayout import MDBoxLayout
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from kivymd.uix.navigationbar import (
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MDNavigationBar,
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MDNavigationItem,
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MDNavigationItemLabel,
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MDNavigationItemIcon,
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)
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from kivymd.app import MDApp
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class BaseMDNavigationItem(MDNavigationItem):
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icon = StringProperty()
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text = StringProperty()
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.add_widget(MDNavigationItemIcon(icon=self.icon))
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self.add_widget(MDNavigationItemLabel(text=self.text))
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class BaseScreen(MDScreen):
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image_size = StringProperty()
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.add_widget(
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FitImage(
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source=f"https://picsum.photos/{self.image_size}/{self.image_size}",
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size_hint=(0.9, 0.9),
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pos_hint={"center_x": 0.5, "center_y": 0.5},
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radius=dp(24),
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),
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)
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class Example(MDApp):
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def on_switch_tabs(
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self,
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bar: MDNavigationBar,
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item: MDNavigationItem,
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item_icon: str,
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item_text: str,
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):
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self.root.get_ids().screen_manager.current = item_text
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def build(self):
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return MDBoxLayout(
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MDScreenManager(
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BaseScreen(
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name="Screen 1",
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image_size="1024",
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),
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BaseScreen(
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name="Screen 2",
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image_size="800",
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),
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BaseScreen(
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name="Screen 3",
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image_size="600",
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),
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id="screen_manager",
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),
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MDNavigationBar(
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BaseMDNavigationItem(
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icon="gmail",
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text="Screen 1",
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active=True,
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),
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BaseMDNavigationItem(
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icon="twitter",
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text="Screen 2",
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),
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BaseMDNavigationItem(
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icon="linkedin",
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text="Screen 3",
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),
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on_switch_tabs=self.on_switch_tabs,
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),
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orientation="vertical",
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md_bg_color=self.theme_cls.backgroundColor,
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)
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Example().run()
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.. image:: https://github.com/HeaTTheatR/KivyMD-data/raw/master/gallery/kivymddoc/navigationbar-usage.gif
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:align: center
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API break
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=========
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1.2.0 version
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-------------
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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 Example(MDApp):
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def build(self):
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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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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: 'Screen 1'
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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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MDLabel:
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text: 'Screen 2'
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halign: 'center'
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'''
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)
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Example().run()
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2.0.0 version
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-------------
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MDNavigationBar in version 2.0.0 no longer provides a screen manager for
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content placement. You have to implement it yourself. This is due to the fact
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that when using MDNavigationBar and MDTabs widgets at the same time, there
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were conflicts between their screen managers.
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.. code-block:: python
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from kivy.lang import Builder
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from kivy.properties import StringProperty
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from kivymd.app import MDApp
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from kivymd.uix.navigationbar import MDNavigationBar, MDNavigationItem
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from kivymd.uix.screen import MDScreen
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class BaseMDNavigationItem(MDNavigationItem):
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icon = StringProperty()
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text = StringProperty()
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class BaseScreen(MDScreen):
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...
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KV = '''
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<BaseMDNavigationItem>
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MDNavigationItemIcon:
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icon: root.icon
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MDNavigationItemLabel:
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text: root.text
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<BaseScreen>
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MDLabel:
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text: root.name
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halign: "center"
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MDBoxLayout:
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orientation: "vertical"
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md_bg_color: self.theme_cls.backgroundColor
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MDScreenManager:
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id: screen_manager
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BaseScreen:
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name: "Screen 1"
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BaseScreen:
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name: "Screen 2"
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MDNavigationBar:
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on_switch_tabs: app.on_switch_tabs(*args)
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BaseMDNavigationItem
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icon: "gmail"
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text: "Screen 1"
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active: True
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BaseMDNavigationItem
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icon: "twitter"
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text: "Screen 2"
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'''
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|
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class Example(MDApp):
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def on_switch_tabs(
|
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self,
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bar: MDNavigationBar,
|
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item: MDNavigationItem,
|
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item_icon: str,
|
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item_text: str,
|
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):
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self.root.ids.screen_manager.current = item_text
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|
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def build(self):
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return Builder.load_string(KV)
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|
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|
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Example().run()
|
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"""
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|
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from __future__ import annotations
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__all__ = (
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"MDNavigationItem",
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"MDNavigationBar",
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"MDNavigationItemLabel",
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"MDNavigationItemIcon",
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)
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import os
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|
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from kivy.animation import Animation
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from kivy.clock import Clock
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from kivy.lang import Builder
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from kivy.metrics import dp
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from kivy.properties import (
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BooleanProperty,
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ColorProperty,
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NumericProperty,
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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.relativelayout import RelativeLayout
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|
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from kivymd.uix.label import MDLabel, MDIcon
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from kivymd.uix.boxlayout import MDBoxLayout
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from kivymd import uix_path
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from kivymd.uix.behaviors import (
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DeclarativeBehavior,
|
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CommonElevationBehavior,
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RectangularRippleBehavior,
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)
|
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from kivymd.utils.set_bars_colors import set_bars_colors
|
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|
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with open(
|
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os.path.join(uix_path, "navigationbar", "navigationbar.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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|
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|
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class MDNavigationItemLabel(MDLabel):
|
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"""
|
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Implements a text label for the :class:`~MDNavigationItem` class.
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|
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.. versionadded:: 2.0.0
|
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|
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For more information, see in the
|
||||
:class:`~kivymd.uix.label.label.MDLabel` class documentation.
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||||
"""
|
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|
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text_color_active = ColorProperty(None)
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"""
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Item icon color in (r, g, b, a) or string format.
|
||||
|
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:attr:`text_color_active` is a :class:`~kivy.properties.ColorProperty`
|
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and defaults to `None`.
|
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"""
|
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|
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text_color_normal = ColorProperty(None)
|
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"""
|
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Item icon color in (r, g, b, a) or string format.
|
||||
|
||||
:attr:`text_color_normal` is a :class:`~kivy.properties.ColorProperty`
|
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and defaults to `None`.
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||||
"""
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||||
|
||||
|
||||
class MDNavigationItemIcon(MDIcon):
|
||||
"""
|
||||
Implements a icon for the :class:`~MDNavigationItem` class.
|
||||
|
||||
.. versionadded:: 2.0.0
|
||||
|
||||
For more information, see in the
|
||||
:class:`~kivymd.uix.label.label.MDIcon` class documentation.
|
||||
"""
|
||||
|
||||
icon_color_active = ColorProperty(None)
|
||||
"""
|
||||
Item icon color in (r, g, b, a) or string format.
|
||||
|
||||
:attr:`icon_color_active` is a :class:`~kivy.properties.ColorProperty`
|
||||
and defaults to `None`.
|
||||
"""
|
||||
|
||||
icon_color_normal = ColorProperty(None)
|
||||
"""
|
||||
Item icon color in (r, g, b, a) or string format.
|
||||
|
||||
:attr:`icon_color_normal` is a :class:`~kivy.properties.ColorProperty`
|
||||
and defaults to `None`.
|
||||
"""
|
||||
|
||||
|
||||
class MDNavigationItem(
|
||||
DeclarativeBehavior,
|
||||
RectangularRippleBehavior,
|
||||
ButtonBehavior,
|
||||
RelativeLayout,
|
||||
):
|
||||
"""
|
||||
Bottom item class.
|
||||
|
||||
For more information, see in the
|
||||
:class:`~kivymd.uix.behaviors.declarative_behavior.DeclarativeBehavior` and
|
||||
:class:`~kivymd.uix.behaviors.ripple_behavior.RectangularRippleBehavior` and
|
||||
:class:`~kivy.uix.anchorlayout.AnchorLayout` and
|
||||
:class:`~kivy.uix.behaviors.ButtonBehavior`
|
||||
classes documentation.
|
||||
|
||||
.. versionchanged:: 2.0.0
|
||||
Rename class from `MDBottomNavigationItem` to `MDNavigationItem`.
|
||||
"""
|
||||
|
||||
active = BooleanProperty(False)
|
||||
"""
|
||||
Indicates if the bar item is active or inactive.
|
||||
|
||||
:attr:`active` is a :class:`~kivy.properties.BooleanProperty`
|
||||
and defaults to `False`.
|
||||
"""
|
||||
|
||||
indicator_color = ColorProperty(None)
|
||||
"""
|
||||
The background color in (r, g, b, a) or string format of the highlighted
|
||||
item.
|
||||
|
||||
.. versionadded:: 1.0.0
|
||||
|
||||
.. versionchanged:: 2.0.0
|
||||
Rename property from `selected_color_background` to `indicator_color`.
|
||||
|
||||
:attr:`indicator_color` is an :class:`~kivy.properties.ColorProperty`
|
||||
and defaults to `None`.
|
||||
"""
|
||||
|
||||
indicator_transition = StringProperty("in_out_sine")
|
||||
"""
|
||||
Animation type of the active element indicator.
|
||||
|
||||
:attr:`indicator_transition` is an :class:`~kivy.properties.StringProperty`
|
||||
and defaults to `'in_out_sine'`.
|
||||
"""
|
||||
|
||||
indicator_duration = NumericProperty(0.1)
|
||||
"""
|
||||
Duration of animation of the active element indicator.
|
||||
|
||||
:attr:`indicator_duration` is an :class:`~kivy.properties.NumericProperty`
|
||||
and defaults to `0.1`.
|
||||
"""
|
||||
|
||||
_selected_region_width = NumericProperty(dp(0))
|
||||
|
||||
def on_active(self, instance, value) -> None:
|
||||
"""Fired when the values of :attr:`active` change."""
|
||||
|
||||
def on_active(*args):
|
||||
Animation(
|
||||
_selected_region_width=dp(64) if value else 0,
|
||||
t=self.indicator_transition,
|
||||
d=self.indicator_duration,
|
||||
).start(self)
|
||||
|
||||
Clock.schedule_once(on_active)
|
||||
|
||||
def on_release(self) -> None:
|
||||
"""Fired when clicking on a panel item."""
|
||||
|
||||
self.parent.set_active_item(self)
|
||||
|
||||
def add_widget(self, widget, *args, **kwargs):
|
||||
if isinstance(widget, MDNavigationItemLabel):
|
||||
self.ids.label_container.add_widget(widget)
|
||||
elif isinstance(widget, MDNavigationItemIcon):
|
||||
self.ids.icon_container.add_widget(widget)
|
||||
elif isinstance(
|
||||
widget,
|
||||
(MDNavigationItemIconContainer, MDNavigationItemLabelContainer),
|
||||
):
|
||||
return super().add_widget(widget)
|
||||
|
||||
|
||||
class MDNavigationBar(CommonElevationBehavior, MDBoxLayout):
|
||||
"""
|
||||
A navigation bar class.
|
||||
|
||||
For more information, see in the
|
||||
:class:`~kivymd.uix.behaviors.elevation.CommonElevationBehavior` and
|
||||
:class:`~kivymd.uix.boxlayout.MDBoxLayout`
|
||||
classes documentation.
|
||||
|
||||
:Events:
|
||||
:attr:`on_switch_tabs`
|
||||
Fired when switching tabs.
|
||||
|
||||
.. versionadded:: 1.0.0
|
||||
|
||||
.. versionchanged:: 2.0.0
|
||||
Rename class from `MDBottomNavigation` to `MDNavigationBar`.
|
||||
"""
|
||||
|
||||
set_bars_color = BooleanProperty(False)
|
||||
"""
|
||||
If `True` the background color of the navigation bar will be set
|
||||
automatically according to the current color of the toolbar.
|
||||
|
||||
.. versionadded:: 1.0.0
|
||||
|
||||
:attr:`set_bars_color` is an :class:`~kivy.properties.BooleanProperty`
|
||||
and defaults to `False`.
|
||||
"""
|
||||
|
||||
def __init__(self, *args, **kwargs):
|
||||
self.register_event_type("on_switch_tabs")
|
||||
super().__init__(*args, **kwargs)
|
||||
Clock.schedule_once(self.set_status_bar_color)
|
||||
|
||||
def set_active_item(self, item: MDNavigationItem) -> None:
|
||||
"""Sets the currently active element on the panel."""
|
||||
|
||||
for widget in self.children:
|
||||
if item is widget:
|
||||
widget.active = True
|
||||
self.dispatch(
|
||||
"on_switch_tabs",
|
||||
widget,
|
||||
widget.ids.icon_container.children[0].icon
|
||||
if len(widget.ids.icon_container.children)
|
||||
else "",
|
||||
widget.ids.label_container.children[0].text
|
||||
if len(widget.ids.label_container.children)
|
||||
else "",
|
||||
)
|
||||
else:
|
||||
widget.active = False
|
||||
|
||||
def set_status_bar_color(self, interval: int | float) -> None:
|
||||
"""Sets the color of the lower system navigation bar."""
|
||||
|
||||
if self.set_bars_color:
|
||||
set_bars_colors(self.md_bg_color, None, self.theme_cls.theme_style)
|
||||
|
||||
def on_switch_tabs(
|
||||
self, item: MDNavigationItem, item_icon: str, item_text: str
|
||||
) -> None:
|
||||
"""Fired when switching tabs."""
|
||||
|
||||
|
||||
class MDNavigationItemIconContainer(BoxLayout):
|
||||
pass
|
||||
|
||||
|
||||
class MDNavigationItemLabelContainer(BoxLayout):
|
||||
pass
|
||||
Loading…
Add table
Add a link
Reference in a new issue