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timelines

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A powerful & easy to use timeline package for Flutter! 🚀

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[![banner](https://raw.github.com/chulwoo-park/timelines/main/design/feature_graphic.png)](https://github.com/chulwoo-park/timelines)

<p align="center">A powerful & easy to use timeline package for Flutter! 🚀</p>

> ***Caveat***: This package is an early stage. Not enough testing has been done to guarantee stability. Some APIs may change.

# Examples

Check it out on the [web](https://chulwoo.dev/timelines/) or look at the [source code](https://github.com/chulwoo-park/timelines/tree/main/example).

| Timeline status | Package delivery tracking | Process timeline |
| - | - | - |
| [![timeline_status](https://raw.github.com/chulwoo-park/timelines/main/screenshots/timeline_status.gif)](https://chulwoo.dev/timelines/#/timeline_status) | [![package_delivery_tracking.gif](https://raw.github.com/chulwoo-park/timelines/main/screenshots/package_delivery_tracking.gif)](https://chulwoo.dev/timelines/#/package_delivery_tracking) | [![process_timeline.gif](https://raw.github.com/chulwoo-park/timelines/main/screenshots/process_timeline.gif)](https://chulwoo.dev/timelines/#/process_timeline) |

<p align="center">More examples<br/>🚧 WIP 🚧</p>

# Features

### The [timeline](#timeline) and each [components](#components) are all WIDGET.

* Common styles can be easily implemented with predefined components.
* Vertical, horizontal direction.
* Alternating contents.
* Combination with Flutter widgets(Row, Column, CustomScrollView, etc).
* Customize each range with themes.

# Getting started

- [Installation](#installation)
- [Basic Usage](#basic-usage)
- [Components](#components)
  - [Theme](#theme)
  - [Indicator](#indicator)
  - [Connector](#connector)
  - [TimelineNode](#timelinenode)
  - [TimelineTile](#timelinetile)
  - [Timeline](#timeline)
  - [TimelineTileBuilder](#timelinetilebuilder)

## Installation

#### 1. Depend on it

Add this to your package's pubspec.yaml file:
``` yaml
dependencies:
  timelines: ^[latest_version]
```

#### 2. Install it
You can install packages from the command line:

with Flutter:
``` console
$ flutter pub get
```

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

#### 3. Import it
Now in your Dart code, you can use:
``` dart
import 'package:timelines/timelines.dart';
```

## Basic Usage

``` dart
@override
Widget build(BuildContext context) {
  return Timeline.tileBuilder(
    builder: TimelineTileBuilder.fromStyle(
      contentsAlign: ContentsAlign.alternating,
      contentsBuilder: (context, index) => Padding(
        padding: const EdgeInsets.all(24.0),
        child: Text('Timeline Event $index'),
      ),
      itemCount: 10,
    ),
  );
}
```

Check the [Example](https://github.com/chulwoo-park/timelines/tree/main/example) or the [API reference](https://pub.dev/documentation/timelines/latest/) for more details.

## Components

### Theme

Check out [Theme Demo](https://chulwoo.dev/timelines/#/theme) to see how the values inside TimelineTile work with the theme.

To customize the timeline component with a theme, do the following:

``` dart
TimelineTheme(
  data: TimelineThemeData(...),
  child: DotIndicator(...),
);
```

If you only want to change part of the parent theme, use `TimelineTheme.of(context)`:

``` dart
TimelineTheme(
  data: TimelineThemeData.of(context).copyWith(...),
  child: DotIndicator(...),
);
```

If the component you want to customize is `Timeline` or `FixedTimeline`, this is also possible:

``` dart
FixedTimeline(
  theme: TimelineThemeData(...),
  children: [...],
);
```

### Indicator

<table>
  <th colspan="2">ContainerIndicator</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/container_indicator.png" alt="ContainerIndicator">
    </td>
    <td>
      <pre lang="dart">
ContainerIndicator(
  child: Container(
    width: 15.0,
    height: 15.0,
    color: Colors.blue,
  ),
)</pre>
    </td>
  </tr>
  <th colspan="2">DotIndicator</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/dot_indicator.png" alt="DotIndicator">
    </td>
    <td><pre lang="dart">DotIndicator()</pre></td>
  </tr>
  <th colspan="2">OutlinedDotIndicator</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/outlined_dot_indicator.png" alt="OutlinedDotIndicator">
    </td>
    <td><pre lang="dart">OutlinedDotIndicator()</pre></td>
  </tr>
</table>

### Connector

<table>
  <th colspan="2">SolidLineConnector</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/solid_line_connector.png" alt="SolidLineConnector">
    </td>
    <td>
      <pre lang="dart">
SizedBox(
  height: 20.0,
  child: SolidLineConnector(),
)</pre>
    </td>
  </tr>
  <th colspan="2">DashedLineConnector</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/dashed_line_connector.png" alt="DashedLineConnector">
    </td>
    <td>
      <pre lang="dart">
SizedBox(
  height: 20.0,
  child: DashedLineConnector(),
)</pre>
    </td>
  </tr>
  <th colspan="2">DecoratedLineConnector</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/decorated_line_connector.png" alt="DecoratedLineConnector">
    </td>
    <td>
      <pre lang="dart">
SizedBox(
  height: 20.0,
  child: DecoratedLineConnector(
    decoration: BoxDecoration(
      gradient: LinearGradient(
        begin: Alignment.topCenter,
        end: Alignment.bottomCenter,
        colors: [Colors.blue, Colors.lightBlueAccent[100]],
      ),
    ),
  ),
)</pre>
    </td>
  </tr>
</table>

### TimelineNode

Pure timeline UI component with no content.

The TimelineNode contains an indicator and two connectors on both sides of the indicator:

<table>
  <th colspan="2">Simple TimelineNode</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/simple_timeline_node.png" alt="Simple TimelineNode">
    </td>
    <td>
      <pre lang="dart">
SizedBox(
  height: 50.0,
  child: TimelineNode.simple(),
)</pre>
    </td>
  </tr>
  <th colspan="2">Complex TimelineNode</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/complex_timeline_node.png" alt="Complex TimelineNode">
    </td>
    <td>
      <pre lang="dart">
SizedBox(
  height: 80.0,
  child: TimelineNode(
    indicator: Card(
      margin: EdgeInsets.zero,
      child: Padding(
        padding: EdgeInsets.all(8.0),
        child: Text('Complex'),
      ),
    ),
    startConnector: DashedLineConnector(),
    endConnector: SolidLineConnector(),
  ),
)</pre>
    </td>
  </tr>
</table>

### TimelineTile

Displays content on both sides of the node:

<table>
  <th colspan="2">TimelineTile</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/timeline_tile.png" alt="TimelineTile">
    </td>
    <td>
      <pre lang="dart">
TimelineTile(
  oppositeContents: Padding(
    padding: const EdgeInsets.all(8.0),
    child: Text('opposite\ncontents'),
  ),
  contents: Card(
    child: Container(
      padding: EdgeInsets.all(8.0),
      child: Text('contents'),
    ),
  ),
  node: TimelineNode(
    indicator: DotIndicator(),
    startConnector: SolidLineConnector(),
    endConnector: SolidLineConnector(),
  ),
)</pre>
    </td>
  </tr>
</table>

### TimelineTileBuilder

TimelineTileBuilder provides powerful build features.

#### Connection

Each tile draws only half of the line connecting the neighboring tiles.
Using the `connected` constructor, lines connecting adjacent tiles can build as one index.

<table>
  <th colspan="2">ConnectionDirection.before</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/connection_direction_before.png" alt="Connection direction before">
    </td>
    <td>
      <pre lang="dart">
FixedTimeline.tileBuilder(
  builder: TimelineTileBuilder.connectedFromStyle(
    connectionDirection: ConnectionDirection.before,
    connectorStyleBuilder: (context, index) {
      return (index == 1) ? ConnectorStyle.dashedLine : ConnectorStyle.solidLine;
    },
    indicatorStyleBuilder: (context, index) => IndicatorStyle.dot,
    itemExtent: 40.0,
    itemCount: 3,
  ),
)</pre>
    </td>
  </tr>
  <th colspan="2">ConnectionDirection.after</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/connection_direction_after.png" alt="Connection direction after">
    </td>
    <td>
      <pre lang="dart">
FixedTimeline.tileBuilder(
  builder: TimelineTileBuilder.connectedFromStyle(
    connectionDirection: ConnectionDirection.after,
    connectorStyleBuilder: (context, index) {
      return (index == 1) ? ConnectorStyle.dashedLine : ConnectorStyle.solidLine;
    },
    indicatorStyleBuilder: (context, index) => IndicatorStyle.dot,
    itemExtent: 40.0,
    itemCount: 3,
  ),
)</pre>
    </td>
  </tr>
</table>

#### ContentsAlign

This value determines how the contents of the timeline will be built:

<table>
  <th colspan="2">ContentsAlign.basic</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/contents_align_basic.png" alt="Basic contents align">
    </td>
    <td>
      <pre lang="dart">
FixedTimeline.tileBuilder(
  builder: TimelineTileBuilder.connectedFromStyle(
    contentsAlign: ContentsAlign.basic,
    oppositeContentsBuilder: (context, index) => Padding(
      padding: const EdgeInsets.all(8.0),
      child: Text('opposite\ncontents'),
    ),
    contentsBuilder: (context, index) => Card(
      child: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Text('Contents'),
      ),
    ),
    connectorStyleBuilder: (context, index) => ConnectorStyle.solidLine,
    indicatorStyleBuilder: (context, index) => IndicatorStyle.dot,
    itemCount: 3,
  ),
)</pre>
    </td>
  </tr>
  <th colspan="2">ContentsAlign.reverse</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/contents_align_reverse.png" alt="Reverse contents align">
    </td>
    <td>
      <pre lang="dart">
FixedTimeline.tileBuilder(
  builder: TimelineTileBuilder.connectedFromStyle(
    contentsAlign: ContentsAlign.reverse,
    oppositeContentsBuilder: (context, index) => Padding(
      padding: const EdgeInsets.all(8.0),
      child: Text('opposite\ncontents'),
    ),
    contentsBuilder: (context, index) => Card(
      child: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Text('Contents'),
      ),
    ),
    connectorStyleBuilder: (context, index) => ConnectorStyle.solidLine,
    indicatorStyleBuilder: (context, index) => IndicatorStyle.dot,
    itemCount: 3,
  ),
)</pre>
    </td>
  </tr>
  <th colspan="2">ContentsAlign.alternating</th>
  <tr>
    <td align="center">
      <img src="https://raw.github.com/chulwoo-park/timelines/main/screenshots/contents_align_alternating.png" alt="Alternating contents align">
    </td>
    <td>
      <pre lang="dart">
FixedTimeline.tileBuilder(
  builder: TimelineTileBuilder.connectedFromStyle(
    contentsAlign: ContentsAlign.alternating,
    oppositeContentsBuilder: (context, index) => Padding(
      padding: const EdgeInsets.all(8.0),
      child: Text('opposite\ncontents'),
    ),
    contentsBuilder: (context, index) => Card(
      child: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Text('Contents'),
      ),
    ),
    connectorStyleBuilder: (context, index) => ConnectorStyle.solidLine,
    indicatorStyleBuilder: (context, index) => IndicatorStyle.dot,
    itemCount: 3,
  ),
)</pre>
    </td>
  </tr>
</table>

### Timeline

The timeline component has two widgets, `Timeline` similar to ScrollView and `FixedTimeline` similar to Flex.

Also their constructors are similar to ScrollView and Flex.

The main difference is that they has TimelineTheme as an ancestor.

The `tileBuilder` constructor provides more powerful features using [TimelineTileBuilder](https://pub.dev/documentation/timelines/latest/timelines/TimelineTileBuilder-class.html).

If you don't need TimelineTileBuilder, you can use other flutter widgets like ListView, Column, Row, etc.

Even if you use the flutter widget, you can use TimelineTheme.

# Documentation

See full [documentation](https://pub.dev/documentation/timelines/latest/)

# Changelog

See [CHANGELOG.md](https://github.com/chulwoo-park/timelines/blob/main/CHANGELOG.md).

# Code of conduct

See [CODE_OF_CONDUCT.md](https://github.com/chulwoo-park/timelines/blob/main/CODE_OF_CONDUCT.md).

# License

[MIT](https://github.com/chulwoo-park/timelines/blob/main/LICENSE)

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