Welcome to the guide where we will explore how to use the FlipBoxBar, a 3D BottomNavigationBar inspired by an innovative design from Dribbble by Dannniel. This widget not only enhances your application’s aesthetic appeal but also enriches the user experience through its interactive flipping animation.

Getting Started

Before diving into the coding part, ensure that you have the necessary setup for Flutter development. Once you are ready, you can integrate the FlipBoxBar into your application.

Implementation Example

Here is a simple example of how to integrate the FlipBoxBar into your Scaffold:

int selectedIndex = 0;

bottomNavigationBar: FlipBoxBar(
  selectedIndex: selectedIndex,
  items: [
    FlipBarItem(icon: Icon(Icons.map), text: Text('Map'), frontColor: Colors.blue, backColor: Colors.blueAccent),
    FlipBarItem(icon: Icon(Icons.add), text: Text('Add'), frontColor: Colors.cyan, backColor: Colors.cyanAccent),
    FlipBarItem(icon: Icon(Icons.chrome_reader_mode), text: Text('Read'), frontColor: Colors.orange, backColor: Colors.orangeAccent),
    FlipBarItem(icon: Icon(Icons.print), text: Text('Print'), frontColor: Colors.purple, backColor: Colors.purpleAccent),
    FlipBarItem(icon: Icon(Icons.print), text: Text('Print'), frontColor: Colors.pink, backColor: Colors.pinkAccent),
  ],
  onIndexChanged: (newIndex) {
    setState() {
      selectedIndex = newIndex;
    };
  },
),

Understanding the Code

Imagine you are building a sophisticated box of chocolates, where each chocolate represents a different functionality in your app. The FlipBoxBar serves as a charming box that displays these chocolates (or navigation items) in a visually appealing way. When you select one chocolate (navigation item), the entire box flips to reveal the selected option, creating an engaging user experience. Each item is crafted with meticulous attention to detail, using colors and icons that are visually distinct but harmonious.

Properties of FlipBoxBar

• List items; – The collection of navigation items to be displayed in the BottomNavBar.
• Duration animationDuration; – The duration for the flip animation of the box.
• ValueChanged onIndexChanged; – A callback to handle the change in selected index.
• int initialIndex; – Specifies the initially selected index of the BottomNavBar.
• double navBarHeight; – Defines the height of the BottomNavBar.

Breaking Changes

Starting from version 0.9.0, a key change was introduced. The selected index must now be explicitly modified and rebuilt to trigger the animation. Previously, only initialIndex was required. The reason for this change is to allow better programmatic control over the selected index, enhancing the interactivity of the FlipBoxBar.

Older Version Example

If you happen to be working with a version prior to 0.9.0, your implementation would look like this:

bottomNavigationBar: FlipBoxBar(
  initialIndex: 0,
  items: [
    FlipBarItem(icon: Icon(Icons.map), text: Text('Map'), frontColor: Colors.blue, backColor: Colors.blueAccent),
    FlipBarItem(icon: Icon(Icons.add), text: Text('Add'), frontColor: Colors.cyan, backColor: Colors.cyanAccent),
    FlipBarItem(icon: Icon(Icons.chrome_reader_mode), text: Text('Read'), frontColor: Colors.orange, backColor: Colors.orangeAccent),
    FlipBarItem(icon: Icon(Icons.print), text: Text('Print'), frontColor: Colors.purple, backColor: Colors.purpleAccent),
    FlipBarItem(icon: Icon(Icons.print), text: Text('Print'), frontColor: Colors.pink, backColor: Colors.pinkAccent),
  ],
  onIndexChanged: (newIndex) {
    print(newIndex);
  },
),

Troubleshooting

If you encounter any issues during the implementation or functionality of the FlipBoxBar, here are a few troubleshooting ideas:

• Ensure that you have imported the necessary packages and dependencies in your pubspec.yaml file.
• Check if the selectedIndex is being updated correctly within the onIndexChanged callback.
• Verify that the widget tree is being rebuilt after changing the index to see the animation.

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Final Thoughts

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.