Sliding Clipped Nav Bar

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Sliding Clipped Nav Bar

Design Credit

Toolbar icons animation by Cuberto

How to use?

API reference

barItems → List<BarItem>

  • List of bar items that shows horizontally, Minimum 2 and maximum 4 items.
    required

selectedIndex → int

  • Selected index of the bar items.
    required

iconSize → double

  • Size of all icons (inactive items), don't make it too big or will be clipped.
    optional 30

activeColor → Color

  • Color of the selected item which indicate selected.
    required

inactiveColor → Color?

  • Inactive color of item, which actually color icons.
    nullable

onButtonPressed → OnButtonPressCallback

  • Callback when item is pressed.
    required

backgroundColor → Color


Add SlidingClippedNavBar() as bottomNavigationBar of Scaffold() and body would be PageView() with NeverScrollableScrollPhysics() don't try to upate the seleted index from onPageChanged or will see some weird behaviour. You can use Stack() or AnimatedSwitcher() for custom page transition animation.

Keep that in mind this navigation menu is taller than normal for small screen it might cover more screen real estate.

Do and don't

  • Don't make icon size too big.

    • FontAwesomeIcons: 24
    • MaterialIcons: 30
  • Using SlidingClippedNavBar() when you want global active and inactive color.

 return Scaffold(
     
      body: PageView(
      physics: NeverScrollableScrollPhysics(),       
      controller: controller,
...
      ),
      bottomNavigationBar: SlidingClippedNavBar(
        backgroundColor: Colors.white,
        onButtonPressed: (index) {
          setState(() {
            selectedIndex = index;
          });
          controller.animateToPage(selectedIndex,
              duration: const Duration(milliseconds: 400),
              curve: Curves.easeOutQuad);
        },
        iconSize: 30,
        activeColor: Color(0xFF01579B),
        selectedIndex: selectedIndex,
        barItems: [
          BarItem(
            icon: Icons.event,
            title: 'Events',
          ),
          BarItem(
            icon: Icons.search_rounded,
            title: 'Search',
          ),
          BarItem(
            icon: Icons.bolt_rounded,
            title: 'Energy',
          ),
          BarItem(
            icon: Icons.tune_rounded,
            title: 'Settings',
          ),
        ],
      ),
    );
  • Using SlidingClippedNavBar.colorful() when you want to set individual item active & inactive color.
 return Scaffold(
     
      body: PageView(
      physics: NeverScrollableScrollPhysics(),
      controller: controller,
...
      ),
      bottomNavigationBar: SlidingClippedNavBar.colorful(
        backgroundColor: Colors.white,
        onButtonPressed: (index) {
          setState(() {
            selectedIndex = index;
          });
          controller.animateToPage(selectedIndex,
              duration: const Duration(milliseconds: 400),
              curve: Curves.easeOutQuad);
        },
        iconSize: 30,
        selectedIndex: selectedIndex,
        barItems: [
          BarItem(
            icon: Icons.event,
            title: 'Events',
            activeColor: Colors.amber,
            inactiveColor: Colors.red,
          ),
          BarItem(
            icon: Icons.search_rounded,
            title: 'Search',
            activeColor: Colors.red,
            inactiveColor: Colors.green,
          ),
          BarItem(
            icon: Icons.bolt_rounded,
            title: 'Energy',
            activeColor: Colors.green,
            inactiveColor: Colors.blue,
          ),
          BarItem(
            icon: Icons.tune_rounded,
            title: 'Settings',
            activeColor: Colors.purple,
            inactiveColor: Colors.brown,
          ),
        ],
      ),
    );

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Libraries

sliding_clipped_nav_bar