Box Transform Figma Replica

main.dart

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

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Box Transform Figma Replica',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(
          seedColor: Colors.blue,
          brightness: Brightness.dark,
        ),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

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

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

  late Rect rect = Rect.fromCenter(
    center: MediaQuery.of(context).size.center(Offset.zero),
    width: 400,
    height: 300,
  );

  late Rect cropRect = rect;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      // Enable and disable crop mode.
      floatingActionButton: FloatingActionButton(
        tooltip: cropping ? 'Disable cropping' : 'Enable cropping',
        onPressed: () {
          setState(() {
            cropping = !cropping;
            cropRect = rect;
          });
        },
        child: Icon(cropping ? Icons.crop : Icons.crop_free),
      ),
      body: Stack(
        fit: StackFit.expand,
        children: [
          TransformableBox(
            key: const ValueKey('Main TransformableBox'),
            rect: rect,
            onChanged: (result, event) {
              setState(() {
                rect = result.rect;
              });
            },
            contentBuilder: (BuildContext context, Rect rect, Flip flip) {
              return DecoratedBox(
                decoration: BoxDecoration(
                  border: Border.all(
                    color: cropping ? Colors.grey : Colors.blue,
                    width: cropping ? 0.75 : 2,
                  ),
                  image: DecorationImage(
                    image: const AssetImage('assets/image.png'),
                    fit: BoxFit.fill,
                    colorFilter: ColorFilter.mode(
                      Colors.black.withOpacity(!cropping ? 0 : 0.5),
                      BlendMode.hardLight,
                    ),
                  ),
                ),
              );
            },
            visibleHandles: {
              if (!cropping)
                ...HandlePosition.corners,
            },
            enabledHandles: {
              if (!cropping)
                ...HandlePosition.corners,
            },
            cornerHandleBuilder: (context, handle) => DefaultCornerHandle(
              handle: handle,
              decoration: BoxDecoration(
                color: Colors.white,
                border: Border.all(
                  color: Colors.blue,
                  width: 2,
                ),
              ),
            ),
          ),
          if (cropping)
            TransformableBox(
              key: const ValueKey('Crop Region TransformableBox'),
              rect: cropRect,
              clampingRect: rect,
              allowContentFlipping: false,
              onChanged: (result, event) {
                setState(() {
                  cropRect = result.rect;
                });
              },
              contentBuilder: (BuildContext context, Rect rect, Flip flip) {
                return Stack(
                  children: [
                    // const Positioned.fill(child: ColoredBox(color: Colors.red)),
                    Positioned.fromRect(
                      rect: Rect.fromCenter(
                        center: this.rect.center - rect.topLeft,
                        width: this.rect.width,
                        height: this.rect.height,
                      ),
                      child: DecoratedBox(
                        decoration: BoxDecoration(
                          border: Border.all(
                            color: Colors.grey,
                            width: 0.75,
                          ),
                          image: const DecorationImage(
                            image: AssetImage('assets/image.png'),
                            fit: BoxFit.fill,
                          ),
                        ),
                      ),
                    )
                  ],
                );
              },
              cornerHandleBuilder: (context, handle) => AngularHandle(
                handle: handle,
                color: Colors.blue,
                hasShadow: false,
                length: 16,
              ),
              sideHandleBuilder: (context, handle) => AngularHandle(
                handle: handle,
                color: Colors.blue,
                hasShadow: false,
                length: 16,
              ),
            ),
        ],
      ),
    );
  }
}