This flutter package contains a widget called DecodingTextEffect which is having some cool Decode Effects for texts.

Aadarsh Patel

Last update: Nov 25, 2020

Related tags

Animation decoding_text_effect

Overview

This flutter package contains a widget called DecodingTextEffect which is having some cool Decode Effects for texts.

Installing

1. Depend on it

Add this to your package's pubspec.yaml file:

dependencies:
  decoding_text_effect: ^1.1.1

2. Install it

You can install packages from the command line:

$ flutter pub get

3. Import it

Now in your Dart code, you can use:

import 'package:decoding_text_effect/decoding_text_effect.dart';

Documentation

Decoding effects occurs only for following two cases,

When the widget is rendered for the very first time.
When the value of originalString parameter gets changed.

DecodingTextEffect(
   this.originalString, {
   @required this.decodeEffect,
   Key key,
   this.textStyle,
   this.textAlign,
   this.refreshDuration,
   this.eachCount = 5,
   this.onTap,
   this.onFinished,
  })  : assert(
         originalString != null,
         'A non-null String must be provided to a Decoding Text Effect Widget.',
        ),
        super(key: key);

Usage

List<String> myText = [
   'Decoding Text\nEffect',
   'Welcome to\nthe Dart Side!',
   'I have 50\nwatermelons',
   'Quick Maths,\n2 + 2 = 4'
  ];

1. DecodeEffect.fromStart

Container(
   height: 200,
   width: 350,
   color: Colors.pink[100],
   padding: EdgeInsets.all(50),
   child: DecodingTextEffect(
      myText[index],
      decodeEffect: DecodeEffect.fromStart,
      textStyle: TextStyle(fontSize: 30),
   ),
),

2. DecodeEffect.fromEnd

Container(
   height: 200,
   width: 350,
   color: Colors.yellow[100],
   padding: EdgeInsets.all(50),
   child: DecodingTextEffect(
      myText[index],
      decodeEffect: DecodeEffect.fromEnd,
      textStyle: TextStyle(fontSize: 30),
   ),
),

3. DecodeEffect.toMiddle

Container(
   height: 200,
   width: 350,
   color: Colors.green[100],
   padding: EdgeInsets.all(50),
   child: DecodingTextEffect(
      myText[index],
      decodeEffect: DecodeEffect.to_middle,
      textStyle: TextStyle(fontSize: 30),
   ),
),

4. DecodeEffect.random

Container(
   height: 200,
   width: 350,
   color: Colors.purple[100],
   padding: EdgeInsets.all(50),
   child: DecodingTextEffect(
      myText[index],
      decodeEffect: DecodeEffect.random,
      textStyle: TextStyle(fontSize: 30),
   ),
),

5. DecodeEffect.all

Container(
   height: 200,
   width: 350,
   color: Colors.blue[100],
   padding: EdgeInsets.all(50),
   child: DecodingTextEffect(
      myText[index],
      decodeEffect: DecodeEffect.all,
      textStyle: TextStyle(fontSize: 30),
   ),
),

refreshDuration and eachCount

The refreshDuration is an optional argument that is having a default value of Duration(milliseconds: 60). Shorter the value of refreshDuration, faster will be the effect and hence decreasing the duration of effect. refreshDuration is also the time gap between two consecutive setState() function calls.

The eachCount is also an optional argument that is having a default value of 5. It is the number of random characters that will be shown before showing the original character and then moving on to decode next character and this cycles repeat until the completion of effect.

Demo

Source code of the below app is available in the example directory of this package's github repository.

Below are some other demonstration of DecoratingTextEffect widget. But the source code of below apps are not in this repository.

Comments

Need cancel timer when dispose

for fix this error

E/flutter (17623): This error happens if you call setState() on a State object for a widget that no longer appears in the widget tree (e.g., whose parent widget no longer includes t
he widget in its build). This error can occur when code calls setState() from a timer or an animation callback.
E/flutter (17623): The preferred solution is to cancel the timer or stop listening to the animation in the dispose() callback. Another solution is to check the "mounted" property of
 this object before calling setState() to ensure the object is still in the tree.
E/flutter (17623): This error might indicate a memory leak if setState() is being called because another object is retaining a reference to this State object after it has been remov
ed from the tree. To avoid memory leaks, consider breaking the reference to this object during dispose().
E/flutter (17623): #0      State.setState.<anonymous closure> (package:flutter/src/widgets/framework.dart:1197:9)
E/flutter (17623): #1      State.setState (package:flutter/src/widgets/framework.dart:1232:6)
E/flutter (17623): #2      _DecodingTextEffectState._startDecoding.<anonymous closure> (package:decoding_text_effect/decoding_text_effect.dart:234:9)
E/flutter (17623): #3      _rootRunUnary (dart:async/zone.dart:1134:38)
E/flutter (17623): #4      _CustomZone.runUnary (dart:async/zone.dart:1031:19)
E/flutter (17623): #5      _CustomZone.runUnaryGuarded (dart:async/zone.dart:933:7)
E/flutter (17623): #6      _CustomZone.bindUnaryCallbackGuarded.<anonymous closure> (dart:async/zone.dart:970:26)
E/flutter (17623): #7      _rootRunUnary (dart:async/zone.dart:1138:13)
E/flutter (17623): #8      _CustomZone.runUnary (dart:async/zone.dart:1031:19)
E/flutter (17623): #9      _CustomZone.bindUnaryCallback.<anonymous closure> (dart:async/zone.dart:954:26)
E/flutter (17623): #10     _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398:19)
E/flutter (17623): #11     _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429:5)
E/flutter (17623): #12     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

opened by bigzhu 1

This flutter package contains a widget called DecodingTextEffect which is having some cool Decode Effects for texts.

Related tags

Overview

This flutter package contains a widget called DecodingTextEffect which is having some cool Decode Effects for texts.

Installing

1. Depend on it

2. Install it

3. Import it

Documentation

Usage

1. DecodeEffect.fromStart

2. DecodeEffect.fromEnd

3. DecodeEffect.toMiddle

4. DecodeEffect.random

5. DecodeEffect.all

refreshDuration and eachCount

Demo

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Comments

Owner

Aadarsh Patel

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