simple_widget_markup

(en)Japanese ver is here.
(ja)この解説の日本語版はここにあります。

Overview

This package is a practical Flutter (Dart) implementation of the Simple Widget Markup Language (SpWML).
SpWML allows for users to create statically flutter layout. It also reduces the amount of program code required and often speeds up compilation. Files output in SpWML have the extension .spwml.

Usage

Quick Start

Below is detailed documentation.
SpWML documentation

You can try how it works on the following sites.
SpWML Editor

The states of text fields, dropdowns, etc. are managed by the following manager classes, so no special operations are required.
If you want to send user input values to the server, you can serialize the manager classes.
simple_managers

Sample code

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

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'SpWML Example',
      theme: ThemeData(
        primarySwatch: Colors.green,
      ),
      home: const SpWMLSample(title: 'SpWML Example'),
    );
  }
}

class SpWMLSample extends StatefulWidget {
  const SpWMLSample({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<SpWMLSample> createState() => _SpWMLSampleState();
}

class _SpWMLSampleState extends State<SpWMLSample> {

  Widget _getSpWMLWidget(BuildContext context){
    return SpWMLBuilder("(h1)Example text").build(context);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
            appBar: AppBar(
              title: Text(widget.title),
            ),
            body: _getSpWMLWidget(context)
    );
  }
}

Example of using inline elements

Please rewrite _getSpWMLWidget in Sample code as follows.

  Widget _getSpWMLWidget(BuildContext context){
    return SpWMLBuilder("(span)\n"
            "+(h1,fontWeight:bold)Example\n"
            "+(h1,textColor:#FF0000)text").build(context);
  }

Cooperation with Widget

Please rewrite _getSpWMLWidget in Sample code as follows.

  Widget _getSpWMLWidget(BuildContext context) {
    SpWMLBuilder builder = SpWMLBuilder("(h1)Replace below this text.\n"
            "(block, sid:button_name)");
    builder.replace(
            "button_name",
            OutlinedButton(
                    onPressed: () {
                      ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
                        content: Text("The button was pressed."),
                        duration: Duration(seconds: 3),
                      ));
                    },
                    child: const Text("Flutter button")));
    return builder.build(context);
  }

Customize basic design

Please rewrite _getSpWMLWidget in Sample code as follows.

  Widget _getSpWMLWidget(BuildContext context) {
    SpWMLFontStyle fontStyle1 = SpWMLFontStyle();
    SpWMLFontStyle fontStyle2 = fontStyle1.deepCopy();
    fontStyle2.styleMap[EnumSpWMLElementType.h1]!.fontWeight =
            EnumFontWeight.light;
    return Column(
      children: [
        SpWMLBuilder("(h1)Example text1", spWMLStyle: fontStyle1).build(context),
        SpWMLBuilder("(h1)Example text2", spWMLStyle: fontStyle2).build(context),
      ],
    );
  }

The style can also be saved as a JSON file.
You can create a Map with toDict and restore it with fromDict.
Please consider if necessary.

  SpWMLFontStyle test = SpWMLFontStyle.fromDict(fontStyle1.toDict());

If you do not change the internal elements

It can be written more easily using the following wrapper widget. Please rewrite _getSpWMLWidget in Sample code as follows.

  Widget _getSpWMLWidget(BuildContext context) {
    return SpWML("(h1)Example text");
  }

Support

If you need paid support for any reason, please contact my company.
This package is developed by me personally, but may be supported via the company.
SimpleAppli Inc.

Format name

Simple Widget Markup Language

Extension

.spwml

MIME Type (Temporary)

text/x.spwml

About version control

The C part will be changed at the time of version upgrade.

• Changes such as adding variables, structure change that cause problems when reading previous files.
  • C.X.X
• Adding methods, etc.
  • X.C.X
• Minor changes and bug fixes.
  • X.X.C

License

This software is released under the MIT License, see LICENSE file.

Copyright notice

The “Dart” name and “Flutter” name are trademarks of Google LLC.
*The developer of this package is not Google LLC.