napa_widgets 0.4.0

napa_widgets: ^0.4.0 copied to clipboard

example/lib/main.dart

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:napa_widgets/napa_widgets.dart';

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

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

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(colorScheme: .fromSeed(seedColor: Colors.deepPurple)),
      home: const MyHomePage(title: 'Napa widgets example'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  late TextEditingController _ted;
  late ScrollController _scrollController;
  Widget? widgetToPresent;

  @override
  void initState() {
    super.initState();

    final testWidget = NapaColumn(
      crossAxisAlignment: .stretch,
      children: [
        NapaContainer(
          color: Colors.blue,
          child: NapaPadding(
            padding: EdgeInsetsGeometry.all(8.0),
            child: NapaText('Hello world!!!'),
          ),
        ),
        NapaExpanded(
          child: NapaClipRect(
            child: NapaCustomPaint(
              painter: NapaCustomPainter(
                scriptType: .lua,
                script: '''
                  function paint(canvas, size)
                    --print("calling paint function from dart")
                    
                    -- color = 0xFFFF0000 
                    local c = ui.newColorFrom(1,1,0,0)
                    canvas:drawColor(c, ui.BlendMode.srcOver)
                    
                    local paint = ui.newPaint()
                    paint.color = ui.newColorFrom(1,0,1,0)
                    local rect = ui.newRectFromLTWH(10,10,100,100)
                    canvas:drawRect(rect,paint)
                    
                    --canvas:save()
                    --canvas:restore()
                    
                    -- print(tostring(size) .. " - " .. tostring(size.flipped))
                  end
                  
                  ''',
              ),
              child: NapaCenter(child: NapaText('NapaCustomPaint')),
            ),
          ),
        ),
        NapaExpanded(child: NapaFlow(
          delegate: NapaFlowDelegate(
            script: '''
              function paintChildren(context)
                print("paintChildren executed")
              end
            '''
          ),
          children: [NapaText('NapaFlow')]
        )),
      ],
    );
    widgetToPresent = testWidget.toWidget();
    final serializableObject = testWidget.toJson();

    // beauty json
    final encoder = JsonEncoder.withIndent('  ');
    final jsonString = encoder.convert(serializableObject);

    _ted = TextEditingController(text: jsonString);
    _scrollController = ScrollController();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisSize: .max,
          crossAxisAlignment: .stretch,
          children: [
            Expanded(
              child: Scrollbar(
                controller: _scrollController,
                trackVisibility: true,
                thumbVisibility: true,
                child: TextField(
                  scrollController: _scrollController,
                  controller: _ted,
                  autofocus: true,
                  expands: true,
                  maxLines: null,
                  minLines: null,
                  onChanged: (value) {
                    try {
                      final deserializedObject = jsonDecode(value);
                      final napaWidget = NapaWidget.decode(deserializedObject);
                      widgetToPresent = napaWidget?.toWidget();
                    } catch (ex) {
                      print(ex);
                      widgetToPresent = Center(
                        child: Text(
                          ex.toString(),
                          style: TextStyle(color: Colors.red),
                        ),
                      );
                    }
                    setState(() {});
                  },
                ),
              ),
            ),
            Expanded(child: Container(child: widgetToPresent)),
          ],
        ),
      ),
    );
  }
}