show_more_text_popup 0.3.0

A Flutter plugin to show the extra text as a popup with parameters to configure the size and other behavior

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:meta/meta.dart';
import 'package:show_more_text_popup/show_more_text_popup.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Show more text',
      home: new HomeScreen(),
    );
  }
}

class HomeScreen extends StatelessWidget {
  final String description =
      "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.";

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: const Text("Demo Show More"),
      ),
      body: new Container(
        child: new DescriptionTextWidget(text: description),
      ),
    );
  }
}

class DescriptionTextWidget extends StatefulWidget {
  final String text;

  DescriptionTextWidget({@required this.text});

  @override
  _DescriptionTextWidgetState createState() =>
      new _DescriptionTextWidgetState();
}

class _DescriptionTextWidgetState extends State<DescriptionTextWidget> {
  String firstHalf;
  String secondHalf;
  GlobalKey key = new GlobalKey();
  bool flag = true;

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

    if (widget.text.length > 40) {
      firstHalf = widget.text.substring(0, 40);
      secondHalf = widget.text.substring(40, widget.text.length);
    } else {
      firstHalf = widget.text;
      secondHalf = "";
    }
  }

  @override
  Widget build(BuildContext context) {
    return new Container(
      padding: new EdgeInsets.symmetric(horizontal: 10.0, vertical: 10.0),
      child: secondHalf.isEmpty
          ? new Text(firstHalf)
          : new Row(
              children: <Widget>[
                new Text(firstHalf + " "),
                new InkWell(
                  key: Key("show_more_ink_well"),
                  child: new Row(
                    mainAxisSize: MainAxisSize.min,
                    mainAxisAlignment: MainAxisAlignment.end,
                    children: <Widget>[
                      new Text(
                        "show more",
                        key: key,
                        style: new TextStyle(color: Colors.blue),
                      ),
                    ],
                  ),
                  onTap: () {
                    showMoreText(widget.text);
                  },
                ),
              ],
            ),
    );
  }

  void showMoreText(String text) {
    ShowMoreTextPopup popup = ShowMoreTextPopup(context,
        text: text,
        textStyle: TextStyle(color: Colors.black),
        height: 200,
        width: 100,
        backgroundColor: Color(0xFF16CCCC),
        padding: EdgeInsets.all(4.0),
        borderRadius: BorderRadius.circular(10.0),
        onDismiss: () {
          ScaffoldMessenger.of(context)
              .showSnackBar(SnackBar(content: Text("Dismiss callback!")));
        }
    );

    /// show the popup for specific widget
    popup.show(
      widgetKey: key,
    );
  }
}