sliding_top_panel

Description:

sliding top panel

sliding_top_panel #



A flutter widget that allows you to display a sliding top panel, this widget works on both Android & iOS.
Installing #
Add the following to your pubspec.yaml file:
dependencies:
sliding_top_panel: ^0.0.7
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Demo #


How to use #
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);

final String title;

@override
State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
final ValueNotifier<bool> _isPanelVisible = ValueNotifier(false);
final SlidingPanelTopController _controller = SlidingPanelTopController();

@override
void initState() {
super.initState();
_controller.addListener(listenerController);
}

void listenerController() {
_isPanelVisible.value = _controller.isPanelOpen;
}

@override
void dispose() {
_controller.removeListener(listenerController);
_controller.dispose();
super.dispose();
}

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: SlidingTopPanel(
// maxHeight: 100,
decorationPanel: const BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(
bottomLeft: Radius.circular(10),
bottomRight: Radius.circular(10),
),
),
controller: _controller,
header: Container(
color: Colors.white,
child: ListTile(
title: const Text("Header Panel"),
trailing: _buildArrowIconHeader(),
onTap: _controller.toggle,
),
),
panel: (_) => _buildListPanel(),
body: _buildGridList(),
),
floatingActionButton: FloatingActionButton.extended(
onPressed: _controller.toggle,
tooltip: 'Increment',
icon: const Icon(Icons.toggle_off),
label: _buildTextFloatingButton(),
),
);
}

Widget _buildArrowIconHeader() {
return ValueListenableBuilder<bool>(
valueListenable: _isPanelVisible,
builder: (BuildContext _, bool isVisible, Widget? __) {
return Icon(
isVisible
? Icons.keyboard_arrow_up_rounded
: Icons.keyboard_arrow_down_rounded,
size: 20,
color: Colors.black45,
);
},
);
}

Widget _buildTextFloatingButton() {
return ValueListenableBuilder<bool>(
valueListenable: _isPanelVisible,
builder: (BuildContext _, bool isVisible, Widget? __) {
return Text(isVisible ? 'Close Panel' : 'Open Panel');
},
);
}

Widget _buildGridList() => GridView.builder(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2,
),
itemBuilder: (BuildContext _, int __) => Container(
color: _getColor(),
),
);

Widget _buildListPanel() => ListView.builder(
itemCount: 20,
padding: EdgeInsets.zero,
itemBuilder: (BuildContext context, int index) => ListTile(
title: Text("Item $index"),
onTap: _controller.close,
),
);

Color _getColor() => Color.fromRGBO(
math.Random().nextInt(255),
math.Random().nextInt(255),
math.Random().nextInt(255),
1,
);
}
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