test-kivy-app/kivy_venv/lib/python3.11/site-packages/kivymd/uix/navigationbar/navigationbar.kv

<MDNavigationBar>
    size_hint_y: None
    height: "80dp"
    elevation_level: 0
    md_bg_color:
        self.theme_cls.surfaceContainerColor \
        if root.theme_bg_color == "Primary" else \
        root.md_bg_color


<MDNavigationItemIcon>
    size_hint: None, None
    size: "24sp", "24sp"
    # theme_text_color: "Custom"
    icon_color:
        ( \
        ( \
        self.theme_cls.onSecondaryContainerColor \
        if self.parent.parent.active else \
        self.theme_cls.onSurfaceVariantColor \
        ) \
        if self.theme_icon_color == "Primary" else \
        ( \
        self.icon_color_active if self.icon_color_active else \
        ( \
        self.theme_cls.onSecondaryContainerColor \
        if self.parent.parent.active else \
        self.theme_cls.onSurfaceVariantColor \
        ) \
        ) \
        if self.parent.parent.active else \
        ( \
        self.icon_color_normal if self.icon_color_normal else \
        ( \
        self.theme_cls.onSecondaryContainerColor \
        if self.parent.parent.active else \
        self.theme_cls.onSurfaceVariantColor \
        ) \
        ) \
        ) \
        if self.parent else self.theme_cls.transparentColor
    on_icon:
        if self.icon not in md_icons.keys(): \
        self.size_hint = (None, None); \
        self.width = self.font_size; \
        self.height = self.font_size

    canvas.before:
        Color:
            rgba:
                ( \
                ( \
                self.theme_cls.secondaryContainerColor \
                if not self.parent.parent.indicator_color else \
                self.parent.parent.indicator_color \
                ) \
                if self.parent.parent.active else \
                self.theme_cls.transparentColor \
                ) \
                if self.parent else self.theme_cls.transparentColor
        RoundedRectangle:
            radius: [dp(16), ]
            size:
                ( \
                (self.parent.parent._selected_region_width, dp(32)) \
                ) \
                if self.parent else (0, dp(32))
            pos:
                ( \
                (self.center_x - self.parent.parent._selected_region_width / 2, \
                self.center_y - dp(16)) \
                ) \
                if self.parent else (0, 0)


<MDNavigationItemLabel>
    adaptive_size: True
    role: "medium"
    text_color:
        ( \
        ( \
        self.theme_cls.onSecondaryContainerColor \
        if self.parent.parent.active else \
        self.theme_cls.onSurfaceVariantColor \
        ) \
        if self.theme_text_color == "Primary" else \
        ( \
        self.text_color_active if self.text_color_active else \
        ( \
        self.theme_cls.onSecondaryContainerColor \
        if self.parent.parent.active else \
        self.theme_cls.onSurfaceVariantColor \
        ) \
        ) \
        if self.parent.parent.active else \
        ( \
        self.text_color_normal if self.text_color_normal else \
        ( \
        self.theme_cls.onSecondaryContainerColor \
        if self.parent.parent.active else \
        self.theme_cls.onSurfaceVariantColor \
        ) \
        ) \
        ) \
        if self.parent else self.theme_cls.transparentColor


<MDNavigationItem>

    MDNavigationItemIconContainer:
        id: icon_container
        size_hint: None, None
        size: self.minimum_size
        pos_hint: {"center_x": .5}
        y:
            ( \
            (root.parent.height - (self.height + dp(16))) \
            if len(label_container.children) else \
            (root.parent.height / 2 - self.height / 2) \
            ) \
            if root.parent else 0

    MDNavigationItemLabelContainer:
        id: label_container
        size_hint: None, None
        size: self.minimum_size
        pos_hint: {"center_x": .5}
        y:
            "16dp" \
            if len(icon_container.children) else \
            ( \
            (root.parent.height / 2 - self.height / 2) if root.parent else 0 \
            )