import 'package:flutter/material.dart';

class OpacityDialog extends StatefulWidget {
  final double initial;
  const OpacityDialog({super.key, required this.initial});
  @override
  _OpacityDialogState createState() => _OpacityDialogState();
}

class _OpacityDialogState extends State<OpacityDialog> {
  late double val;
  @override
  void initState() {
    super.initState();
    val = widget.initial;
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: Text('Opacity Watermark'),
      content: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Slider(
            value: val,
            min: 0.1,
            max: 1.0,
            divisions: 9,
            label: '${(val * 100).toStringAsFixed(0)}%',
            onChanged: (v) => setState(() => val = v),
          ),
          SizedBox(height: 8),
          Text('Preview: ${(val * 100).toStringAsFixed(0)}%'),
        ],
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.pop(context),
          child: Text('Batal'),
        ),
        TextButton(
          onPressed: () => Navigator.pop(context, val),
          child: Text('OK'),
        ),
      ],
    );
  }
}