view method

@override Widget view(BuildContext context)

Display your widget.

Implementation

@override
Widget view(BuildContext context) {
  Map<int, NavigationTab> pages = orderedPages;
  _layout = layout(context);

  if (_layout?.kind == "journey") {
    return _buildJourneyLayout(context, pages);
  }

  if (_layout?.kind == "bottomNav") {
    Widget body = maintainState
        ? IndexedStack(
            index: currentIndex,
            children: [
              for (var page in pages.entries)
                Navigator(
                  key: getNavigationKey(page),
                  onGenerateRoute: (settings) => MaterialPageRoute(
                    builder: (context) =>
                        page.value.page ?? SizedBox.shrink(),
                    settings: settings,
                  ),
                ),
            ],
          )
        : Navigator(
            key: getNavigationKey(pages.entries.elementAt(getCurrentIndex)),
            onGenerateRoute: (settings) => MaterialPageRoute(
              builder: (context) =>
                  (pages.entries.elementAt(getCurrentIndex).value.page ??
                  SizedBox.shrink()),
              settings: settings,
            ),
          );

    // Build the navigation bar items
    List<BottomNavigationBarItem> navItems = [
      for (MapEntry<int, NavigationTab> page in pages.entries)
        _buildBottomNavigationBarItem(page),
    ];

    // Check for custom builder first
    if (_layout?.navBarBuilder != null) {
      final data = NavBarData(
        items: navItems,
        currentIndex: getCurrentIndex,
        onTap: onTap,
      );

      Widget customNavBar = _layout!.navBarBuilder!(context, data);

      try {
        return bottomNavBuilder(context, body, customNavBar);
      } on UnimplementedError catch (_) {
        return Scaffold(body: body, bottomNavigationBar: customNavBar);
      }
    }

    // Build standard nav bar
    Widget bottomNavigationBar = BottomNavigationBar(
      currentIndex: getCurrentIndex,
      onTap: onTap,
      selectedLabelStyle:
          _layout?.selectedLabelStyle ??
          TextStyle(color: Colors.black, fontWeight: FontWeight.w600),
      unselectedLabelStyle:
          _layout?.unselectedLabelStyle ??
          TextStyle(color: Colors.black, fontWeight: FontWeight.w400),
      showSelectedLabels: _layout?.showSelectedLabels ?? true,
      showUnselectedLabels: _layout?.showUnselectedLabels ?? true,
      selectedItemColor: _layout?.selectedItemColor ?? Colors.black,
      unselectedItemColor: _layout?.unselectedItemColor ?? Colors.black,
      selectedFontSize: _layout?.selectedFontSize ?? 14.0,
      unselectedFontSize: _layout?.unselectedFontSize ?? 12.0,
      iconSize: _layout?.iconSize ?? 24.0,
      elevation: _layout?.elevation ?? 8.0,
      backgroundColor: _layout?.backgroundColor,
      type: _layout?.type ?? BottomNavigationBarType.fixed,
      items: navItems,
    );

    // Apply style if provided
    if (_layout?.style != null) {
      bottomNavigationBar = _layout!.style!.build(
        context,
        bottomNavigationBar,
      );
    }

    try {
      return bottomNavBuilder(context, body, bottomNavigationBar);
    } on UnimplementedError catch (_) {
      return Scaffold(body: body, bottomNavigationBar: bottomNavigationBar);
    }
  }

  if (_layout?.kind == "topNav") {
    return DefaultTabController(
      length: pages.length,
      initialIndex: getCurrentIndex,
      animationDuration: _layout?.animationDuration,
      child: Scaffold(
        appBar: AppBar(
          backgroundColor: _layout?.backgroundColor,
          title: pages[getCurrentIndex]?.title == null
              ? null
              : Text(pages[getCurrentIndex]?.title ?? ""),
          toolbarHeight: (_layout?.hideAppBarTitle ?? true) ? 0 : null,
          bottom: TabBar(
            isScrollable: _layout?.isScrollable ?? false,
            labelColor: _layout?.labelColor,
            labelStyle: _layout?.labelStyle,
            labelPadding: _layout?.labelPadding,
            unselectedLabelColor: _layout?.unselectedLabelColor,
            unselectedLabelStyle: _layout?.unselectedLabelStyle,
            indicatorColor: _layout?.indicatorColor,
            automaticIndicatorColorAdjustment:
                _layout?.automaticIndicatorColorAdjustment ?? true,
            indicatorWeight: _layout?.indicatorWeight ?? 2.0,
            indicatorPadding: _layout?.indicatorPadding ?? EdgeInsets.zero,
            indicator: _layout?.indicator,
            indicatorSize: _layout?.indicatorSize,
            dividerColor: _layout?.dividerColor,
            dividerHeight: _layout?.dividerHeight,
            dragStartBehavior:
                _layout?.dragStartBehavior ?? DragStartBehavior.start,
            overlayColor: _layout?.overlayColorState,
            mouseCursor: _layout?.mouseCursor,
            enableFeedback: _layout?.enableFeedback,
            physics: _layout?.physics,
            splashFactory: _layout?.splashFactory,
            splashBorderRadius: _layout?.splashBorderRadius,
            tabAlignment: _layout?.tabAlignment,
            textScaler: _layout?.textScaler,
            tabs: [
              for (MapEntry page in pages.entries)
                _buildTab(page.value, page.key),
            ],
            onTap: onTap,
          ),
        ),
        body: maintainState
            ? IndexedStack(
                index: getCurrentIndex,
                children: [
                  for (var page in pages.entries)
                    Navigator(
                      key: getNavigationKey(page),
                      onGenerateRoute: (settings) => MaterialPageRoute(
                        builder: (context) =>
                            (page.value.page ?? SizedBox.shrink()),
                        settings: settings,
                      ),
                    ),
                ],
              )
            : TabBarView(
                physics: _layout?.physics,
                children: [
                  for (var page in pages.entries)
                    Navigator(
                      key: getNavigationKey(page),
                      onGenerateRoute: (settings) => MaterialPageRoute(
                        builder: (context) =>
                            (page.value.page ?? SizedBox.shrink()),
                        settings: settings,
                      ),
                    ),
                ],
              ),
      ),
    );
  }
  throw Exception("Invalid layout type");
}