spannable_grid 0.3.0

Custom grid widget that allows it's cells to span columns and rows and supports editing.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:spannable_grid/spannable_grid.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'SpannableGrid Demo',
      theme: ThemeData(
        primarySwatch: Colors.blueGrey,
        accentColor: Colors.amber,
      ),
      home: MyHomePage(title: 'SpannableGrid Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  bool _singleCell = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            SpannableGrid(
              columns: 4,
              rows: 4,
              cells: _getCells(),
              onCellChanged: (cell) { print('Cell ${cell.id} changed'); },
            ),
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: TextButton(
                child: Text('Change'),
                onPressed: () {
                  setState(() {
                    _singleCell = !_singleCell;
                  });
                },
              ),
            ),
          ],
        ),
      ),
    );
  }

  List<SpannableGridCellData> _getCells() {
    var result = <SpannableGridCellData>[];
    if (_singleCell) {
      result.add(SpannableGridCellData(
        column: 1,
        row: 1,
        columnSpan: 4,
        rowSpan: 4,
        id: "Test Cell 1",
        child: Container(
          color: Colors.lime,
          child: Center(
            child: Text("Tile 4x4",
              style: Theme
                  .of(context)
                  .textTheme
                  .headline6,
            ),
          ),
        ),
      ));
    }
    else {
      result.add(SpannableGridCellData(
        column: 1,
        row: 1,
        columnSpan: 2,
        rowSpan: 2,
        id: "Test Cell 1",
        child: Container(
          color: Colors.lime,
          child: Center(
            child: Text("Tile 2x2",
              style: Theme
                  .of(context)
                  .textTheme
                  .headline6,
            ),
          ),
        ),
      ));
      result.add(SpannableGridCellData(
        column: 4,
        row: 1,
        columnSpan: 1,
        rowSpan: 1,
        id: "Test Cell 2",
        child: Container(
          color: Colors.lime,
          child: Center(
            child: Text("Tile 1x1",
              style: Theme
                  .of(context)
                  .textTheme
                  .headline6,
            ),
          ),
        ),
      ));
      result.add(SpannableGridCellData(
        column: 1,
        row: 4,
        columnSpan: 3,
        rowSpan: 1,
        id: "Test Cell 3",
        child: Container(
          color: Colors.lightBlueAccent,
          child: Center(
            child: Text("Tile 3x1",
              style: Theme
                  .of(context)
                  .textTheme
                  .headline6,
            ),
          ),
        ),
      ));
      result.add(SpannableGridCellData(
        column: 4,
        row: 3,
        columnSpan: 1,
        rowSpan: 2,
        id: "Test Cell 4",
        child: Container(
          color: Colors.lightBlueAccent,
          child: Center(
            child: Text("Tile 1x2",
              style: Theme
                  .of(context)
                  .textTheme
                  .headline6,
            ),
          ),
        ),
      ));
    }
    return result;
  }
}