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appflowy board

appflowy_board #
AppFlowy Board
A customizable and draggable Kanban Board widget for Flutter

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Intro #
appflowy_board is a customizable and draggable Kanban Board widget for Flutter.
You can use it to create a Kanban Board tool like those in Trello.
Check out appflowy_board to see to build a BoardView database.

Getting Started #
Add the AppFlowy Board Flutter package to your environment.
With Flutter:
flutter pub add appflowy_board
flutter pub get
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This will add a line like this to your package's pubspec.yaml:
dependencies:
appflowy_board: ^0.1.0
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Create your first board #
Initialize an AppFlowyBoardController for the board. It contains the data used by the board. You can
register callbacks to receive the changes of the board.

final AppFlowyBoardController controller = AppFlowyBoardController(
onMoveGroup: (fromGroupId, fromIndex, toGroupId, toIndex) {
debugPrint('Move item from $fromIndex to $toIndex');
},
onMoveGroupItem: (groupId, fromIndex, toIndex) {
debugPrint('Move $groupId:$fromIndex to $groupId:$toIndex');
},
onMoveGroupItemToGroup: (fromGroupId, fromIndex, toGroupId, toIndex) {
debugPrint('Move $fromGroupId:$fromIndex to $toGroupId:$toIndex');
},
);
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Provide an initial value of the board by initializing the AppFlowyGroupData. It represents a group data and contains list of items. Each item displayed in the group requires to implement the AppFlowyGroupItem class.

void initState() {
final group1 = AppFlowyGroupData(id: "To Do", items: [
TextItem("Card 1"),
TextItem("Card 2"),
]);
final group2 = AppFlowyGroupData(id: "In Progress", items: [
TextItem("Card 3"),
TextItem("Card 4"),
]);

final group3 = AppFlowyGroupData(id: "Done", items: []);

controller.addGroup(group1);
controller.addGroup(group2);
controller.addGroup(group3);
super.initState();
}

class TextItem extends AppFlowyGroupItem {
final String s;
TextItem(this.s);

@override
String get id => s;
}

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Finally, return a AppFlowyBoard widget in the build method.

@override
Widget build(BuildContext context) {
return AppFlowyBoard(
controller: controller,
cardBuilder: (context, group, groupItem) {
final textItem = groupItem as TextItem;
return AppFlowyGroupCard(
key: ObjectKey(textItem),
child: Text(textItem.s),
);
},
groupConstraints: const BoxConstraints.tightFor(width: 240),
);
}

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Usage Example #
To quickly grasp how it can be used, look at the /example/lib folder.
First, run main.dart to play with the demo.
Second, let's delve into multi_board_list_example.dart to understand a few key components:

A Board widget is created via instantiating an AppFlowyBoard object.
In the AppFlowyBoard object, you can find the AppFlowyBoardController, which is defined in board_data.dart, is fed with pre-populated mock data. It also contains callback functions to materialize future user data.
Three builders: AppFlowyBoardHeaderBuilder, AppFlowyBoardFooterBuilder, AppFlowyBoardCardBuilder. See below image for what they are used for.

Glossary #
Please refer to the API documentation.
Contributing #
Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.
Please look at CONTRIBUTING.md for details.